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Determination of the kinetic parameters of ferrocene-N-phenylaza-15-crown-5 by methods of convolution Y.I. Moharram, M.M. Ghoneim15 August 2004Journal of Electroanalytical ChemistryA method of analysis for the determination of the electrochemical parameters in the case of a quasi-reversible electron transfer process followed by a homogeneous chemical reaction (ECirrev) is reported. It is based on methods of convolution electrochemistry and can be applied to chronoamperometric curves. Digital simulation studies are also frequently performed to confirm the results. A procedure for calculation of the values of kc and E1/2 is reported. As an experimental example, the electrooxidation of ferrocene-N-phenylaza-15-crown-5 at a glassy carbon electrode in 0.1 M TBAP as supporting electrolyte in acetonitrile was
Methanolic extract of Marrubium vulgare ameliorates hyperglycemia and dyslipidemia in streptozotocin-induced diabetic ratsEssam Abdel-SattarfMay 2015Volume 3, Issue 1,Aim and background Marrubium vulgare is used in traditional medicine in some countries such as Mexico in the treatment of diabetes. On the other hand, some studies reported the antioxidant effect of the extract due to its flavonoid content. The current study was designed to investigate the antidiabetic and antidyslipidemic effects of the methanolic extract of the aerial part of M. vulgare in streptozotocin-induced diabetic rats. Materials and methods The antidiabetic activity of a daily single oral dose of 500 mg/kg/day of M. vulgare for 28 days was evaluated by measuring the fasting blood glucose and the peak of blood glucose level within 120 min of oral glucose tolerance test (OGTT) in diabetic rats. In addition, the effect of the extract on blood plasma insulin was measured as well as its effect on tissue glycogen contents in muscles and liver. Moreover, its effect on the oxidant status was evaluated. Results M. vulgare significantly reduced the blood glucose level starting on the second week. Furthermore, the extract of M. vulgare showed significant increase in plasma insulin and tissue glycogen contents. The antidyslipidemic effect was demonstrated by a significant reduction in plasma total cholesterol (TC), triglycerides (TG), and low density lipoprotein-cholesterol (LDL-C), while the cardio-protective lipid, high density lipoprotein-cholesterol (HDL-C), was increased. Conclusion The present data suggest that M. vulgare’s methanolic extract has antihyperglycemic with antidyslipidemic effect. The protective effect of the extract may be in part due to its antioxidant activity. Keywords Marrubium vulgare; Antihyperglycemic; Antioxidant; Dyslipedimia; Diabetes; OGTTEngineering
Development and evaluation of glibenclamide floating tablet with optimum releaseEbtessam A. Essa, Fatma E. Elkotb, Esmat E. Zin Eldin, Gamal M. El MaghrabyJune 2015Journal of Drug Delivery Science and Technology, Volume 27Glibenclamide is a poorly soluble drug with narrow absorption window. The strategy of this work was to enhance the dissolution rate of Glibenclamide by solid dispersion (SD) technique with optimum formulation being developed as floating tablets. Binary SDs of drug and poloxamer 407 were prepared at different ratios. Ternary dispersion was prepared by the addition of sodium bicarbonate as third component. For floating tablets, a series of floating formulations was prepared using HPMC k4 (F1), HPMC k15 (F2) and combination of both with Carbopol (F3), using ternary solid dispersion as the drug matrix. Effect of matrix type was studied, F4 and F5 were prepared using the same floating matrix as F3 but drug was either binary poloxamer SD or physically mixed with bicarbonate. Unprocessed drug in floating matrix was used as control. All SDs increased drug dissolution rate, with ternary mixture showing the highest dissolution efficiency reflecting synergism between poloxamer and sodium bicarbonate. Solid state characterization showed evidences of decreased drug crystalline structure. F3 showed the best floating behavior. Considering floating behavior together with the release pattern, F3 was the optimum formulation. Overall, employing drug as ternary SD with optimum dissolution can provide flexibility in developing controlled release floating system.Pharmacy
Development of liquid oral sustained release formulations of nateglinide: In vitro and in vivo evaluationGamal M. El Maghraby, Alaa E. Elsisi, Gehad A. ElmeshadOctober 2015ournal of Drug Delivery Science and Technology, Volume 29,Nateglinide is a phenyl alanine derivative which is used orally for treatment of diabetes mellitus [1]. It lowers the plasma level of glucose by stimulating insulin secretion from pancreas. This is dependent upon functioning beta cells in pancreatic islets as it interacts with ATP-sensitive channel with subsequent depolarization, producing calcium influx and insulin secretion [2]. This novel anti-diabetic agent can compensate for the impaired glucose excursion with subsequent improve in early phase of insulin release. It can be considered as a highly physiologic meal time glucose regulator [3]. Nateglinide mono therapy controls signifi- cantly mealtime hyperglycemia and results in improved overall glycemic control in patient with T2DM by reducing glycosylated hemoglobin (HbA1C) levels. Nateglinide has an excellent safety and tolerability profile and provides a life time flexibility that other anti-diabetic agents could not accomplish. Nateglinide is an effective gateekeeper in T2DM [2]. Nateglinide has rapid onset so it is important in preventing diabetic complication. The peak plasmaPharmacy
Distally based medial island septocutaneous flap for repair of soft-tissue defects of the lower legHelmy A. Shalaby, M. Higazi, S. Mandour, M.A. El-Khalifa, H. Ayad1991British Journal of Plastic Surgery, Volume 44, Issue 3A medial island septocutaneous flap, based on the lower septocutaneous vessels from the posterior tibial artery and vein, has been designed. This flap was rotated 90 degrees in 5 cases and 180 degrees in 2 cases to cover soft-tissue defects on the lower third of the leg.Medicine
Dielectric behaviour in Mg–Zn ferritesM.A. El Hiti15 February 1999ournal of Magnetism and Magnetic Materials,he effect of frequency, temperature and composition on the dielectric behaviour was studied for Science
Utility of immunohistochemical markers in differential diagnosis of follicular cell-derived thyroid lesionsHanan AlSaeid AlshenawySeptember 2014Journal of Microscopy and Ultrastructure, Volume 2, Issue 3Each studied marker was sensitive and specific for certain thyroid lesion but the sensitivity and the specificity were increased when two or more markers from the panel were used together.Medicine
Can Lactobacillus acidophilus improve minimal hepatic encephalopathy? A neurometabolite study using magnetic resonance spectroscopyDina H. Ziada, Hanan H. Soliman, Saher A. El Yamany, Manal F. Hamisa, Azza M. HasanSeptember 2013,Arab Journal of Gastroenterology, Volume 14, Issue 3Both probiotic and lactulose therapy can improve blood ammonia and psychometric tests in MHE and reduce the risk of developing overt encephalopathy. MRS showed more improvement in the levels of brain neurometabolites in the probiotic group.Medicine
Synthesis, spectral, antitumor and antimicrobial studies onSaid Amer, Nadia El-Wakiel, Hoda El-Ghamry8 October 2013Journal of Molecular Structurepyridinecarbaldehyde, salicylaldehyde, 2,4-dihydroxybenzaldehyde and 2-hydroxy-1-naphthaldehyde have been prepared. The donor atoms and the possible geometry of the complexes were investigated by means of elemental and thermal analyses, molar conductance, magnetic momentscience
Circulating endothelial cells and serum visfatin are indicators of cardiovascular disease risk in psoriasis patientsLamia Elgarhy, Naeim Abdelnabi, Amani Abdullatif, Mohamed Attia, Maaly Mohammad Mabrouk, Eman El SheikhMarch 2016Dermatologica Sinica, Volume 34, Issue 1Both numbers of CECs and serum visfatin levels were increased in PS patients compared with controls and also increased in CVD risk positive when compared with CVD risk negative PS patients. Both correlated with disease severity suggesting the possibility of increased CVD risk in PS patients.Medicine
Magnetic resonance imaging of uterovaginal lesions associated with female infertilityManal Ezzat Badawy, Dina Gamal Eldeen Y. Elkholi, Mohamed Fouad Sherif, Mohamed Abd Elgeleel HefedahMarch 2015Middle East Fertility Society Journal, Volume 20, Issue 1The present study proved that MR imaging was the method of choice for precise diagnosis of uterovaginal lesions associated with infertility, when the diagnosis was not conclusive on HSG and TVUS. MR imaging was mandatory for conclusive diagnosis of mullerian duct anomalies, adenomyosis uteri and multiple uterine leiomyomas destined to myomectomy or uterine artery embolization. The accuracy, sensitivity, specificity and positive and negative predictive values of MR imaging for diagnosis of these lesions were 100%.Medicine
Effect of different irrigant solutions on microhardness and smear layer removal of root canal dentinHebatalla E. Kandil, Ahmed H. Labib, Hatem A. AlhadainyApril 2014Tanta Dental Journal, Volume 11, Issue 1, April 2014, Pages 1-11To compare the effect of different irrigants on root dentin microhardness and smear layer removal.Dentistry
Polarographic behaviour of loratadine and its direct determination in pharmaceutical formulation and human plasma by cathodic adsorptive stripping voltammetryM.M Ghoneim, M.M Mabrouk, A.M Hassanein, A TawfikJuly 2001Journal of Pharmaceutical and Biomedical Analysis, Volume 25, Issues 5–6,The polarographic behaviour of the antihistaminic drug loratadine has been investigated in B.R. buffer solution of different pH values. Contradictory to that mentioned before in a previously published workPharmacy
Thermal performance of a packed bed double-pass solar air heaterM.R.I. Ramadan, A.A. El-Sebaii, S. Aboul-Enein, E. El-Bialy, August 2007,Energy,The thermal performance of a double-glass double-pass solar air heater with a packed bed (DPSAHPB) above the heater absorber plate was investigated experimentally and theoretically. Suitable computer program was developed for the analytical solution of the energy-balance equations for the various elements of the system. Limestone and gravel were used as packed bed materials. Numerical calculations were carried out, on typical summer days of 2003, to study the effect of different operational and science
Spectroscopic studies of 4-(4,6-dimethylpyrimidin-2-ylazo) benzene-1,3-diol and its Cu(II) complexesM. Gaber, Tarek A. Fayed, S. El-Daly, Y.S.Y. El-Sayed1, September 2007Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyThe electronic absorption spectra of 4-(4,6-dimethylpyrimidin-2-ylazo)benzene-1,3-diol have been studied in organic solvents of different polarities as well as in buffer solutions of varying pH. The observed UV–vis absorption bands are assigned to the corresponding electronic transitions. The effect of methanol ratio on the pK-value is discussed. Also, semiemperical molecular orbital calculations at the AM1 level have been performed to investigate the molecular and electronic structures of the free ligand in the ground state. According to these calculations, an intramolecular hydrogen bond leads to increasing of the molecular stability. The important bands in the IR spectrum as well as the main signalsScience
DC conductivity M.A. El Hiti1 September 1994ournal of Magnetism and Magnetic Materials,The dc conductivity was studied as a function of temperatureScience
Pyroelectricity and dielectric anisotropy in polarized and niobium modified barium titanate ceramicsOriginal Thermochimica Acta30 December 1980Thermochimica Acta,The effect of time of soaking on bulk density and dielectric constant has been measured on pure and niobium-doped barium titanate pyroelectric specimens. The temperature dependence of the dielectric constant for both pure and niobium-doped barium titanate samples has been investigated before and after poling. The percentage dielectric anisotropy and ferroelectricity was also calculated for various pure and modified barium titanate pyroelectric materials. Our results can be explained in terms of the redistribution of the barium titanate lattice in a different crystallographic orientation, polarization, as well as the existence of lattice imperfection accompanying temperature, poling and niobium doping. The obtained results were in good conformity, and correlated with the increased proportion of the remnant 90° domains (induced electrically charged vacancies as a result of Nb3+ substitution of Ti4+ in octahedral lattice sites). It was concluded that poling of Nb-doped barium titanate samples produces the best quality ceramic pyroelectrics.Medicine
Experimental schistosomal hepatitis: Protective effect of coenzyme Q10 against the state of oxidative stressAhmad A. Othman, Zeinab S. Shoheib, Ghada A. Abdel-Aleem, Mohamed M. ShareefOctober 2008Experimental Parasitology, Volume 120, Issue 2Schistosoma mansoni (S. mansoni) eggs trapped in the host liver elicit a chain of oxidative processes that may be, at least in part, responsible for the pathology and progression of fibrosis associated with schistosomal hepatitis.Medicine
Histochemistry of gastric epithelial glycoprotein of the glandular stomach of the one humped camel (Camelus Dromedarius)M.H FayedJune 1997PathophysiologyThe gastric mucosa of the one humped camel was histochemically analyzed by a series of selected staining procedures. The surface mucous cells (SMC), foveolar mucous cells (FMC) and glandular mucous cells (GMC) secrete a mixture of glycoproteins (Gps) with oxidizable vicinal diols,Agriculture
In vitro stress analysis study of different prosthetic options using single posterior implant for management of mandibular unilateral distal extension saddleI.A. Dahab, A.A. El-Gendy, I.R. EltorkyMarch 2015Original Research Article Tanta Dental Journal, Volume 12, Issue 1, March 2015, Pages 7-15The aim of this study is to compare in vitro, micro-strain induced by different prosthetic options using single posterior implant in lower unilateral distal extension saddle (Kennedy class II).Dentistry
Thermal performance of a box-type solar cookerA.A. El-SebahOctober 1997EnergyA simple mathematical model is presented for a box-type solar cooker with outer-inner reflectors. It is based on analytical solution of the energy-balance equations for different elements of the cooker. The cooker performance is investigated by computer simulation in terms of the cooker efficiency as well as characteristic and specific boiling timesscience
Behavior of RC beams strengthened with strain hardening cementitious composites (SHCC) subjected to monotonic and repeated loadsAbd El-Hakim Khalil, Emad Etman, Ahmed Atta, , Mohamed Essam June 2017Engineering StructuresUltra High Performance Strain Hardening Cementitious Composites (UHP-SHCC) is a newly developed construction material, has large advantages on large strain capacity as well as high compressive and tensile strength, which is useful for strengthening or repair concrete members. However, some important obstacles need to be studied, such as the strain localization occurs in the UHP-SHCC strengthening layer around the substrate concrete cracks, which severely limits the ductility of the strengthened beam subjected to monotonic and repeated loads. In the present study, ten specimens were tested experimentally, which divided into two major groups, each group contains five specimens, one as a control and four strengthened with constant UHP-SHCC layer thickness having variable reinforcement ratios embedded in the middle of the strengthening layer. Two types of loading were applied; Monotonic loading for the first group and short time repeated loading for the second group. The recorded tests showed that use additional reinforcement embedded in the strengthening layer for beams strengthened with UHP-SHCC become sufficient at certain limit to eliminate the observed early strain localization and to gain adequate ductility under both monotonic and repeated loading. Another important conclusion is the strengthening of RC structures using an unreinforced UHP-SHCC layer may lead to a brittle failure especially in case of repeated loading.Engineering
Solvatochromism, molecular and electronic structures of trans and cis isomers of a typical styryl pyridinium Shakir T. Abdel-Halim, Mohamed K. Awad28 February 2009,Journal of Molecular StructureThis paper reports on solvatochromism and molecular and electronic structures of a typical styryl pyridinium cyanine dyescience
Low dose ribavirin has been effective in the treatment of incapacitating muco-cutaneous extrahepatic manifestations in patients with hepatitis C with contraindication or no access for approved antiviral treatmentEslam Saber Esmail, Fat-heyah Elsayed Asal, Mohammed Yussif, Asem Ahmed ElfertSeptember–December 2015Arab Journal of Gastroenterology, Volume 16, Issues 3–4low dose ribavirin was effective in the treatment of incapacitating mucocutaneous extrahepatic manifestations of chronic HCV infection in patients with contraindication or no access to the approved antiviral treatments.Medicine
Evidences for antiosteoporotic and selective estrogen receptor modulator activity of silymarin compared with ethinylestradiol in ovariectomized ratsNagla A. El-Shitany, Sahar Hegazy, Karema El-desokyDecember 2012Biomedicine & Pharmacotherapy, Volume 66, Issue 8Recently, growing multiple uses of silymarin (SIL) as a complementary and alternative medicine, for alcohol-induced liver disease, acute and chronic viral hepatitis, as well as some other nonhepatic indications have been reported. Therefore, more attention should be paid for the hormonal side effects of SIL. Since the available data on the possible estrogenic effects of SIL is rather rare, this study aimed to further elucidate the different estrogenic effects and antiosteoporotic activity of SIL in ovariectomized (OVX) rats. OVX rats were treated chronically (12 weeks) with ethinylestradiol (EE) or SIL. Uterine and body weight were measured in all animalsMedicine
Asthma remodeling: The pathogenic role of matrix metalloproteinase-9Amgad A. Farhat, Ahmad S. Mohamad, Mohamad M. Shareef, Ghada Atef Attia, Manal A. Eid, Rehab W. TahaOctober 2014Egyptian Journal of Chest Diseases and Tuberculosis, Volume 63, Issue 4Background Asthma is an airway inflammatory disease with functional and structural changes, leading to bronchial hyperresponsiveness and airflow obstruction. Pathological repair of the airways leads to these structural changes referred as airway remodeling. Matrix metalloproteinases (MMPs) are extracellular degrading enzymes that play a critical role in the remodeling process. Aim of the study Is to study matrix metalloproteinase-9 in asthmatic patients, detecting its pathogenic role in airway remodeling. Subjects and methods Samples of broncho-alveolar lavage (BAL) fluid and bronchoscopic biopsies from 30 asthmatic patients (10 mild, 10 moderate and 10 severe) and 10 healthy volunteers were assessed for the levels of matrix metalloproteinase-9 (MMP-9) total and differential cell count (in BAL fluid), histological airway remodeling changes and immunohistochemical expression of MMP-9 (in mucosal biopsies). Results BAL and tissue MMP-9 (going hand in hand with airway remodeling changes) were higher in asthmatic patients and it was significantly increased with increased severity. BAL total cell count is higher in asthmatic patients. BAL eosinophils, neutrophils, lymphocytes as well as MMP-9 positive cell count were higher in asthmatic patients and increased with severity. MMP-9 tissue expression was also strongly inversely correlated with the spirometric parameters in asthmatic patients.Medicine
The relationship between salivary levels of cortisol, chromogranin A (CgA) and xerostomia in post-menopausal womenE.A. Al-Kholy, M.A. Mahmoud, F.A. EL Nomany, E.A. EL ZamaranyDecember 2014Tanta Dental Journal, Volume 11, Issue 3, December 2014, Pages 161-168Menopause may be associated with some adverse changes, such as oral dryness (OD) feeling. The exact mechanisms that mediate sensation of OD in menopausal women have not been firmly established. The purpose of the present study was to assess the relationship of un-stimulated whole saliva cortisol and chromogranin A (CgA) levels with OD feeling in post-menopausal women.Dentistry
Comparison of accuracy of transabdominal ultrasonography, progesterone and pregnancy-associated glycoproteins tests for discrimination between single and multiple pregnancy in sheep Aly Karena, Bouchra El Amiri, Jean-Francios Beckersb, 15 July 2006TheriogenologyThe aim of the present study was to evaluate and, compare the accuracy of transabdominal ultrasonographic (US) and the progesterone (P4-RIA) and ovine pregnancy-associated glycoprotein (ovPAG-RIA) tests for the discrimination between single and multiple pregnancy in sheep.Medicine
Unexplained postmenopausal uterine bleeding from atrophic endometrium: Histopathological and hormonal studiesDina Gamal Eldeen Elkholi, Halah Mohamed NagyDecember 2015Middle East Fertility Society Journal, Volume 20, Issue 4Objective: To study the histopathology of endometrium and the serum concentration of sex steroid hormones in different types of atrophic endometrium associated with postmenopausal uterine bleeding (PMB). Design: Prospective observational study. Main outcome measures: Types of atrophic endometrium with PMB and serum concentration of sex steroid hormones in each type during and between episodes of bleeding. Materials and methods: One hundred and nine patients with PMB were investigated. Transvaginal ultrasonography was performed for all the cases. Medicine
Assessment of ureteral obstruction in patients with compromised renal function: Value of Curved Planar Reformations in MDCT Insights into regulatory molecules of intestinal epithelial cell turnover during experimental infection by Heterophyes heterophyesAugust 2014,Experimental Parasitology, Volume 143Curved planar reformation MDCT is a useful noninvasive technique which is accurate in diagnosing the cause and level of ureteral obstruction in patients with compromised renal functions and is helpful for planning the therapeutic management of such patients.Medicine
The inhibition of steel corrosion in aqueous solutions containing oxygenM.A. Elmorsi, M.M. Ghoneim, F.M. Issa, E.M. Mabrouk October 1987Surface and Coatings Technologyhe corrosion behaviour of steel in aerated aqueousscience
Eradication of Helicobacter pylori decreases the expression of p53 and c Myc oncogenesHanan AlSaeid Alshenawy, Amr Mahrous AlshafeyDecember 2009Arab Journal of Gastroenterology, Volume 10, Issue 4H. pylori infection in the gastric mucosa may be implicated in the pathway of gastric carcinogenesis. It seems that H. pylori infection is responsible for early genomic instability even before any neoplastic changes and its eradication can reverse the sequence of inflammation and related atrophy, metaplasia, and genomic instability and, thus, may prevent gastric cancer development.Medicine
Efficacy and safety of tamsulosin as a medical expulsive therapy for stones in childrenHussein A. Aldaqadossi, Hossam Shaker, Mohammed Saifelnasr, Mohammed GaberJune 2015Arab Journal of Urology, Volume 13, Issue 2Tamsulosin used as a medical expulsive therapy for children with ureteric stones is safe and effective, as it facilitates spontaneous expulsion of the stone.Medicine
Effect of biofilm forming plant growth promoting rhizobacteria on salinity tolerance in barley Wedad A. Kasim , Reda M. Gaafar, Rania M. Abou-Ali, Mohamed N. Omar, Heba M. HewaitDecember 2016Annals of Agricultural SciencesFormation of biofilm under varying stress conditions is a significant strategy adopted by bacterial strains for their successful survival in plant rhizosphere. In this study, the activity of biofilm formation of 20 isolates and strains of plant growth promoting rhizobacteria (PGPR) was determined under different salt concentrations. Agriculture
Non-linear analysis of creeping flow on the inclined permeable substrate plane subjected to an electric Kadry Zakaria, Magdy A. Sirwah, Sameh A. AlkharashiJuly 2012International Journal of Non-Linear Mechanics,he effect of an externally applied electric field on the stability of a thin fluid film over an inclined porous plane is analyzed using linear and non-linear stability analysis in the long wave limit. The principle aim of this study is to illustrate the influence of electric field on the non-linear stability of a thin liquid layer flow down incline substrate when the plane is porous. The driving force for the instability under an electric field is an electrostatic force exerted on the free charges accumulated at the dividing interface. The coupled non-linear evolution equations for the local film thickness and the interfacial charge for two-dimensional disturbances are derived to analyze the effect of long-wave instabilities. The method of multiple scales is applied to obtain approximate solutions and analyze the stability criteria. Numerical simulations of this system of non-linear evolution equations are performed. It is found that the permeability parameter as well as the inclination of the plane plays a destabilizing role in the stability criteria, while the damping influence is observed for increasing of the electrical conductivity in both linear and non-linear behaviorscience
Immunohistochemical expression of epidermal growth factor receptor, E-cadherin, and matrix metalloproteinase–9 in ovarian epithelial cancer and relation to patient deathsHanan AlSaeid AlshenawyDecember 2010Annals of Diagnostic Pathology, Volume 14, Issue 6Ovarian cancer is the most frequent cause of death from gynecologic cancer in the world. Current prognostic factors do not allow reliable prediction of response to chemotherapy and survival for individual ovarian cancer patients. Epidermal growth factor receptor (EGFR), E-cadherin, and matrix metalloproteinase (MMP)–9 are frequently studied in cancer; but their prognostic value in ovarian carcinoma remains unclear. In this study, we investigated the immunohistochemical expression of EGFR, E-cadherin, and MMP-9 in 120 cases of ovarian epithelial carcinoma; their relation to each other; their relation to histologic type, grade, and stage; and their relation to death rates after 3years of follow-up. Our results show that EGFR and MMP-9 were overexpressed extensively in high grades and advanced stages especially in nonserous carcinomas. E-cadherin was gradually lost in advanced cancers. There was a positive relation between the 3 antibodies and between them and the death rates. There is a strong relationship between EGFR and MMP-9, and this relation may occur by affecting E-cadherin. The present study provides a rationale for evaluating drugs that target these new pathways that may be promising in ovarian cancer treatment.Medicine
Thermo-optical properties of a solar energy storage materialH. El-Kashef, G.E. Hassan1 September 1999,Optics & Laser TechnologyA dual wavelength laser Mach–Zehnder interferometric technique is applied for measuring the absolute values of refractive index n and its thermo-optic coefficients dn/dT for paraffin wax. The values of n and dn/dT are used to calculate a number of the decisive thermo-optic propertiesscience
Direct determination of praziquantel in pharmaceutical formulations and human plasma by cathodic adsorptive stripping differential-pulse voltammetryM.M Ghoneim, M.M Mabrouk, A Tawfik7 November 2002Journal of Pharmaceutical and Biomedical Analysis, Volume 30, Issue 4, The polarographic and cyclic voltammetric behaviour of praziquantel was studied in B.R. buffers of different pH values. Contradictory to that mentioned in a previously published work, praziquantel is an electro-active compound. Its polarogram exhibited a single 2-electron irreversible reduction wave in B.R. buffer of pH 5Pharmacy
Influence of glass cover inclination angle on radiation heat transfer rate within stepped solar stillY.A.F. El-Samadonya, , , Wael M. El-Maghlanyb, , A.E. Kabeela, 15 April 2016DesalinationIn the present work, a new theoretical analysis of the radiation heat transfer rate inside a stepped solar still is presented. Radiation shape factor between hot saline water and glass cover for a stepped solar still is computed. The effect of taking the radiation shape factor into consideration is qualitatively and quantitatively determined. The effect of glass cover inclination angle (from 10° to 70°) and solar insolation (from 200 to 1200 W/m2) on stepped solar still productivity; taking into account the radiation shape factor is investigated. It is found that the influence of the radiation shape factor on the thermal performance predictions is significant. Moreover, the productivity of the solar still is found to be sensitive to the radiation shape particularly at low solar insolation and/or high glass cover inclination angle (i.e. latitude angle of the site) and vice versa. At low solar insolation of 200 W/m2 and glass cover inclination angle of 70°, the percentage increase in the still productivity, when considering the radiation shape factor, is up to 18.8%. Finally, fair agreement between the present theoretical work and the previous experimental result has been accomplished.Engineering
Metal complexes with Alizarin complexone—I: Physiocochemical characters and stability constants of theSafaa H. Etaiw, Raafat M. Issa, Nasef B. El-Assy 2, 1981complexesOriginal Research Articleynthesized and characterized by, pH titrations, conductance measurements, UV, visible and IR spectral studies.Science
Lead substitutions for promoted critical current density Jc and mechanical properties Khaled M. Elsabawy, Elsayed E. Kandyel 5 June 2007,Materials Research Bulletin,he crystalline lattice constants were evaluated and exhibit noticeable length elongation in case of c-axis as x increases while a, b-axes were nearly constant. Furthermore,science
Neural network modeling of the load-carrying capacity of eccentrically-loaded single-angle strutsSherief S.S. Sakla2004Journal of Constructional Steel ResearchIn the majority of structural applications, single angles are usually loaded in such a manner that the applied load is eccentric. Eccentrically loaded single-angle struts are among the most difficult structural members to analyse and design. In many cases, the compressive resistances calculated using existing conventional design models can differ greatly from experimental results available in the literature. In this study, the potential of using artificial neural networks (ANNs) to predict the load-carrying capacity of pin-ended single-angle struts is investigated. Results of reported experimental studies on eccentrically loaded steel single-angle struts were used to train and validate the proposed ANN model. The performance of the proposed ANN model was subsequently compared to that of the AISC specification currently in use. It is shown that neural networks outperform the current AISC specification and provide an efficient alternative method in predicting the load-carrying capacity of eccentrically loaded single-angle struts. Using the developed ANN model, a parametric study was then conducted on angles connected by one leg to investigate the effect of changing the location of the applied loadEngineering
Proteolytic activity, amino acid composition and protein quality of germinating fenugreek seeds (Trigonella foenum graecum L.)Ahmed Rafik El-Mahdy1985Food ChemistryThis study determined the changes in proteolytic activity and trypsin inhibitor, due to germination for 120 h, and their relationships to amino acid content and protein quality. The activities of cas-ase, Hb-ase, and BAPA-ase, as well as the trypsin inhibitor of the fenugreekAgriculture
The effect of local application of melatonin gel on the healing of periodontal osseous defects in experimentally induced diabetes in rabbitsD.A. Yousuf, O.M. Afify, K.S. El Soudany, S.M. GhoniemAugust 2013Tanta Dental Journal, Volume 10, Issue 2, August 2013, Pages 48-57The aim of our study was to evaluate the effect of local application of melatonin gel on the healing of surgically induced periodontal osseous defects in diabetes-induced rabbits.Dentistry
Comparative evaluation of 2 skeletally anchored maxillary protraction protocolsMohammed H. Elnagar, Eman Elshourbagy, Safaa Ghobashy, Mohamed Khedr, Carla A. EvansNovember 2016American Journal of Orthodontics and Dentofacial Orthopedics, Volume 150, Issue 5, November 2016, Pages 751-762The aim of this study was to evaluate and compare the effects of 2 protocols of bone-anchored maxillary protraction with an untreated control group.Dentistry
Association of STAT4 polymorphism with susceptibility and severity of rheumatoid arthritis and systemic lupus erythematosus in Egyptian patientsHanan M. El-Saadany, Wesam H. Amer, Haidy S. Khalil, Rasha A. Gaber, Samah A. ElshweikhJanuary 2016 The Egyptian Rheumatologist, Volume 38, Issue 1STAT4 polymorphism was associated with an increased risk of RA and SLE patients, so it may be a common genetic risk factor for both diseases. Moreover RA, SLE patients who are homozygous for the T-allele are susceptible to have increased disease activity and severity.Medicine
History of the solar ponds: A review studyA.A. El-Sebaii, M.R.I. Ramadan, S. Aboul-Enein, A.M. Khallaf6, August 2011Renewable and Sustainable Energy ReviewsSolar pond was discovered as a natural phenomena around the turn of the last century in the Medve Lake in Transylvania in Hungary. In this lake, temperatures up to 70 °C were recorded at a depth of 1.32 m at the end of the summer season. The minimal temperature was 26 °C during early spring. The bottom of this lake had a salt NaCl with concentration of 26
Reduction of polymerization shrinkage in methyl methacrylate-montmorillonite compositesNehal Salahuddin, Mohamed M Shehata February 2002Materials Letters, Volume 52, Issues 4–5, February 2002, Pages 289-294Polymethylmethacrylate-clay composites were synthesized by adding an organophilic montmorillonite up to 1% by weight to one commercial type of polymethylmethacrylate. Acrylic test specimens were processed by the conventional heat curing method following the manufacturer's instructions. Evidence for the reduction of warpage and linear dimensional changes in composites was provided using a travelling microscope. The resulting materials have been identified by X-ray diffraction and thermogravimetric analysis.Dentistry
Effect of repeated bleaching by low hydrogen peroxide regimens – with and without MI Paste Plus – on enamel hardness and compositionS.E. Abo-Hamar, W.M. EtmanAugust 2014Tanta Dental Journal, Volume 11, Issue 2, August 2014, Pages 114-121The aim of the present study was to test the following hypotheses: 1. In-vitro repeated bleaching by low hydrogen peroxide (HP) regimens –at 2-month interval- will affect enamel hardness and composition. 2. The use of MI Paste Plus, GC Co. (MIPP) during bleaching treatments will reduce these possible enamel changes.Dentistry
New Leaf Diseases of Barley in EgyptFarid F. Mehiar, Emad El-Deen H. Wasfy, Ibrahim A. El-Samra,1976Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische MikrobiologieLeaf diseases of barley were observed also in Egypt. From leaves of barley were isolated: Helminthosporium teres, H. gramineum, Stemphylium vesicarium, Alternaria triticina, Ulocladium chartarum, Acremonium kiliense, Stemphylium spec. accompanied with the Pleospora stage.Agriculture
Development of the rabbit craniomandibular joint in association with tooth eruptionN.B. Nagy, J.C. DanielApril 1992Archives of Oral Biology, Volume 37, Issue 4, April 1992, Pages 271-280The adult rabbit craniomandibular joints (CMJs) are stress-bearing joints. The two CMJs and the teeth form an articular triad. In early fetal life the developing triad consists of the CMJ primordia, the tooth germs for the entire set of deciduous teeth, as well as the posterior extensions of the dental lamina, which will give rise to the permanent teeth with no deciduous predecessors. During postnatal life, before occlusion is established, there is a remodelling stage in which the CMJ builds up its matrix components such as collagenous and elastic fibres, proteoglycans and type II collagen. Remodelling gradually diminishes into the maintenance stage once occlusion is fully established and after eruption of the first and second molars. Chondrocytes first appear in the CMJ articular disc during the second week of postnatal development. These cells localize in the band areas of the disc and establish an extensive cartilaginous matrix 3–4 weeks postnatally. This study supports the concept that the full development of a fibrocartilaginous articular disc, rich in proteoglycans, occurs as adult occlusion is established.Dentistry
Augmentation of thermal efficiency of the glass evacuated solar tube collector with coaxial heat pipe with different refrigerants and filling ratioA.E. Kabeela, , , Mohamed M. Khairat Dawoodb, Ali I. Shehatac15 April 2017Energy Conversion and ManagementModified coaxial heat pipes have been designed and manufactured to improve the thermal performance of the glass evacuated solar collectors. Heat pipes were made up of two concentric copper tubes so that the annulus volume space between the concentric tubes was charged with refrigerant. In addition, the air as the working fluid at four different mass flow rates 0.0051, 0.0062, 0.007 and 0.009 kg/s flows through the inner tube of the heat pipe to the flow through the annulus between the heat pipe and glass evacuated solar tubes. The effect of the tilt angle of the evacuated tube on thermal performance of the evacuated solar tube collector was examined to obtain the optimum tilt angle during the experiments period. The influence of filling ratio for the two types of refrigerant R22 and R 134a on the thermal efficiency of the coaxial heat pipe solar collector at filing ratio range from 30% to 60% was conducted experimentally. Results show that the maximum increased in the thermal efficiency reached 67% corresponding to without heat pipes at mass flow rate 0.009 kg/s. The experiment results showed similarity between the two refrigerants.Engineering
Kinetics of catalyzed hydrolysis of 4-methylumbelliferyl caprylate (MUCAP) salmonella reagentaAhmed S. Al-Kady, El-Sadat I. Ahmed, M. Gaber, Mohamed M. Hussein, El-Zeiny M. EbeidSeptember 2011Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 79, Issue 5, September 2011, Pages 1540-1545The kinetics of chemical hydrolysis including neutral, acid- and base-catalyzed hydrolysis of 4-methylumbelliferyl caprylate (MUCAP) salmonella reagent were studied at different temperatures. The rate constants and activation parameters were determined by following the build-up of fluorescence peak of the hydrolysis product 4-methylumbelliferone (4-MU). The time scale of esterase enzyme hydrolysis caused by salmonella was compared with chemical hydrolysis as a background process.Pharmacy
Improvement of postharvest quality of cut rose cv. ‘First Red’ by biologically synthesized silver nanoparticlesF.A.S. Hassan, E.F. Alib, B. El-Deeb24 November 2014Scientia HorticulturaeThe efficacy of biologically synthesized silver nanoparticles (AgNPs) was evaluated for their potential to improve the postharvest quality of rose cut flowers cv. ‘First Red’. AgNPs were applied as pulse treatment Agriculture
Co-crystallization for enhanced dissolution rate of nateglinide: In vitro and in vivo evaluationMona F. Arafa, Sanaa A. El-Gizawy, Mohamed A. Osman, Gamal M. El MaghrabyApril 2017ournal of Drug Delivery Science and Technology, Volume 38Nateglinide is a non-sulphonylurea which was approved for treatment of type II diabetes mellitus. Its pH dependent slow dissolution resulted in variable oral bioavailability. This work presents Co-crystallization as a strategy for enhanced dissolution rate of nateglinide. The study was extended to investigate the effect of this dissolution enhancement on the hypoglycemic effect of the drug in diabetic rats. Sucralose was utilized as a co-crystal co-former at two different molar ratios (1:1 and 1:2, drug to sugar). The co-crystal formulations were prepared utilizing wet co-grinding technique in presence of acetone. The Co-crystallization process was monitored using infrared spectroscopy, thermal analysis and X-ray diffraction. Drug dissolution was monitored before and after processing with and without sucralose. The optimum co-crystalline product was evaluated for hypoglycemic effect with reference to the unprocessed drug. The study revealed polymorphic conversion of nateglinide after precipitation from acetone. Co-crystals were formed with 1:2 drug to sucralose (molar ratio) being optimum for co-crystallization process. The developed co-crystals exhibited fast drug dissolution and resulted in faster and more extensive reduction in blood glucose level compared with the unprocessed drug. The study thus introduced co-crystallization technique for enhanced dissolution rate and hypoglycemic efficacy of nateglinide.Pharmacy
Evaluation of using microplates osteosynthesis for pediatric mandibular fracturesM.S. Sheta, M.M. Shoushan, M.M. Hussein, S.E. Abd ElaalSeptember 2015Tanta Dental Journal, Volume 12, Issue 3, September 2015, Pages 149-155The purpose of this study was to evaluate both clinically and radiographically using of two microplates in treatment of displaced pediatric mandibular fractures.Dentistry
Ultrasonic assessment of facial soft tissue thicknesses in adult EgyptiansInas Hassan El-Mehallawi, Eman Mostafa SolimanMarch 2001Forensic Science International, Volume 117, Issues 1–2The production of a three-dimensional plastic face on an unknown human skull has been practiced sporadically since the latter part of the last century. In recent years, the technique has been revived and applied to forensic science cases. The morphometric method of forensic facial reconstruction rests heavily on the use of facial soft tissue depth measurements. Moreover, it has been established that measurements made on the living are of more value than those made on the dead. In view of the well-known genetic complexities of the Egyptians, and the lack of knowledge of average facial soft tissue depths of the Egyptians that makes facial reconstruction questionable, it was decided to set up a table of norms for facial tissue thicknesses in 204 adult Egyptians aged 20–35 years. Tissue depths at 17 established landmarks (according to Aulsebrook et al. [Forensic Sci. Int. 79 (1996) 83]) were obtained using ultrasonic probing. The study revealed a unique spectrum of measurements for the Egyptians that might be useful for facial reconstruction purposes with obvious sexual dimorphism in facial soft tissue thickness. Additionally, the study provided evidence for the presence of interpopulation differences in average facial soft tissue thicknesses as evidenced from the comparison of the present data of Egyptians with those previously reported for some other populations.Medicine
Serum resistin level in obstructive sleep apnea patients complicated with cardiac diseases, diabetes mellitus or renal impairmentBasem I. El-Shafey, Mohammad M. El-Bedewy, Tymor Mostafa, Mohmad AttiaJanuary 2015,Egyptian Journal of Chest Diseases and Tuberculosis, Volume 64, Issue 1The aim of this work is screening of cardiac dysfunction, DM and renal impairment in OSA patients and to study the role of resistin serum level in occurrence of these complications. OSA patients can be complicated with cardiac diseases, DM and renal impairment through elevated resistin serum levels.Medicine
The Paleozoic sandstones in Wadi Feiran - El Tor area, SinaiA. Allam 1, 1989Journal of African Earth Sciences (The Paleozoic sandstone succession between Wadi Feiran and El-Tor in southwestern Sinai has been subdivided into five distinct lithostratigraphic units: the Lower Cambrian Araba Formation; the Upper Cambrian Naqus Formation; the Lower Carboniferous Abu Durba Formation; the Upper Carboniferous Aheimer Formation and the Permian Qiseib Formation. The present study has also proved that the Paleozoic Earth movements have undergone distinct changes in the sedimentary facies, together with lateral variations in the composition and thickness of strata. The distribution of the sediments and their faunal contents point to the existence of five major phases of sedimentation during the Paleozoic Era.Science
Morphological appearance of Toxoplasma gondii in tissue cultures and tissues of various hostsAdel Mohamed Aly Abbas1971Transactions of the Royal Society of Tropical Medicine and Hygiene, Volume 65, Issue 3Abstract Tissues from mice infected with the RH or Beverley strain were used to inoculate tissue culture, chick embryos and mice. Schizont-like structures were demonstrated in the former two systems as well as in chicks infected during embryonic life. Ring and partial ring arrangements as well as rosettes were also demonstrated in tissue culture. An interesting cytoplasmic mass with 4 nuclei as one developmental stage inside a cyst was found in a mouse brain.Medicine
Clinical and biochemical predictors of carotid intima media thickness in adolescents with type 2 diabetesRania Gaber, Nesreen A. kotb, Hala M. NagyMarch 2014The Egyptian Heart Journal, Volume 66, Issue 1, Supplement CIMT is increased in adolescents with type 2 diabetes as compared to control subjects. Poor glycemic control, HOMA, increased C reactive protein, BMI, duration of diabetes and elevated blood pressure are associated with early atherosclerosis in these patients.Medicine
Effects of the herbicide atrazine on Entomobrya musatica (Collembola) in field and laboratory experimentsA.I.M. Al-Assiuty, M.A. KhalilSeptember 1996Applied Soil EcologyField and laboratory toxicity tests were carried out, to evaluate the effects of atrazine on population abundance, distribution pattern, fecundity and instar duration of Entomobrya musatica (Collembola). In field experiments atrazine treatments at doses of 1.6 kg a.i. Science
Pullout capacity of batter pile in sandAshraf Nazir, , Ahmed Nasr March 2013Journal of Advanced ResearchMany offshore structures are subjected to overturning moments due to wind load, wave pressure, and ship impacts. Also most of retaining walls are subjected to horizontal forces and bending moments, these forces are due to earth pressure. For foundations in such structures, usually a combination of vertical and batter piles is used. Little information is available in the literature about estimating the capacity of piles under uplift. In cases where these supporting piles are not vertical, the behavior under axial pullout is not well established. In order to delineate the significant variables affecting the ultimate uplift shaft resistance of batter pile in dry sand, a testing program comprising 62 pullout tests was conducted. The tests are conducted on model steel pile installed in loose, medium, and dense sand to an embedded depth ratioEngineering
Supramolecular host–guest systems as frameworks for excitation energy transferMoustafa Sh Ibrahim, Safaa El-din H Etaiw15 January 2002Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, The antenna behavior of rhodamine 6G and methylene blue loaded novel host supramolecular frameworks is investigated. The geometrical constraints of these supramolecular hosts allows the cationic dye molecules encapsulating within the parallel channels to form novel host–guest systems. The cationic dyes are close together that self-quenching of electronic excitation energy can occur. The excitation energy transfer occurs from rhodamine 6G as a donor (D) to methylene blue as an acceptor (A) within supramolecular systems filled with a mixture of both dyes.Science
Cytogenetic activities of 3 sulphonamidesA. Badr April 1982Mutation Research LettersThe cytogenetic effects of 3 sulphonamides were analysed by a standard Allium test. Mitotic and chromosomal abnormalities are described. The sulphonamides tested were sulphadiazine, sulphadimidine and sulphaphenazole. Actively dividing cells were treated with 4 concentrations of each drug for 4, 24 and 48 h. Treatment for 4 h caused a marked increase in the mitotic index (MI), whereas longer treatment induced a severe reduction in mitotic activity. The 3 drugs produced a number of mitotic abnormalities resulting from an action of the spindle apparatus. They also induced some chromosomal abnormalities by direct or indirect action on the chromosomes. science
Intra-bullous blood instillation could be an effective and safe volume reduction technique of emphysematous bullae.Ahmed Sh. Mohamed, Dalia E. El-Sharawy, Mohamed M. Hefeda17 November 2016Egyptian Journal of Chest Diseases and TuberculosisIntra-bullous blood instillation could be an effective and safe volume reduction technique of emphysematous bullae.Medicine
Chemical and technological studies on faba bean seeds. I—Effect of storage on some physical and chemical propertiesAhmed A. El-Refai, Hussien M. Harras, Kamal M. El-Nemr,.Mohammed A. Noaman1988Food ChemistryThe effects of different methods of storage on some physical and chemical properties of sun-dried Faba beans were studied. Studied methods of storage were: storage in Makamer (the method most commonly used in Egypt),Agriculture
Nonlinear behavior of RC beams strengthened with strain hardening cementitious composites subjected to monotonic and cyclic loadsAbd El-Hakim Khalil, Emad Etman, Ahmed Atta, , Mohamed Essam June 2016Alexandria Engineering JournalUltra High Performance Strain Hardening Cementitious Composites (UHP-SHCC) are useful for strengthening or repairing concrete members. However there is a need to use refined analytical tools to simulate response of strengthened system. In this study, ABAQUS finite element program is used to numerically perform a parametric study including two major groups. Each group contains nine specimens strengthened from the tension side with variable thickness of UHP-SHCC and reinforced with variable reinforcement ratios embedded in the strengthening layer. Two types of loading were applied: monotonic loading for the first group and cyclic loading for the second group. ABAQUS CPS4R mesh element nonlinear is used to model the concrete, while truss element nonlinear is used to model longitudinal and transverse steel reinforcement. The numerical results obtained are in good agreement with the experimental work found in the literature. The results from the parametric study showed that it is sufficient to use 1.2% additional reinforcement ratio embedded in the strengthening layer for beams strengthened with UHP-SHCC to eliminate the observed early strain localization and to gain adequate ductility under both static and cyclic loadings.Engineering
The potential role of cyclooxygenase-2 inhibitors in the treatment of experimentally-induced mammary tumour: does celecoxib enhance the anti-tumour activity of doxorubicin?Wageh M. Awara, Alaa E. El-Sisi, Magda E. El-Sayad, Ahmed E. GodaNovember 2004Pharmacological Research, Volume 50, Issue 5The potential anti-tumour activity of non-steroidal anti-inflammatory drugs (NSAIDS) has been previously discussed. This study was undertaken to assess the possible anti-tumour activity of the cyclooxygenase-2 (COX-2) inhibitor; celecoxib in an animal model of mammary carcinoma; the solid Ehrlich carcinoma (SEC). The possibility that celecoxib may modulate the anti-tumour activity of doxorubicin on the SEC was also studied. Some of the possible mechanisms underlying such modulation were investigatedPharmacy
Electrochemical behavior and determination of amiloride drug in bulk form and pharmaceutical formulationG.B El-Hefnawy, I.S El-Hallag, E.M Ghoneim, M.M Ghoneim10 March 2004,Journal of Pharmaceutical and Biomedical AnalysisThe polarographic behavior of amiloride hydrochloride has been studied in Britton–Robinson bufferscience
Use of a percutaneous puncture needle for true lumen re-entry during subintimal recanalization of the superficial femoral arteryAmr M. AborahmaSeptember 2016Journal of Vascular Surgery Cases and Innovative Techniques, Volume 2, Issue 3Failure of subintimal angioplasty commonly results from an inability to re-enter the true lumen. When re-entry devices are not available, an alternative is the retrograde approach. This case report describes three patients with superficial femoral artery occlusion treated by endovascular intervention that showed failure of re-entry into the true lumen after the subintimal approach. In these patients, re-entry was achieved by the use of a percutaneous needle inside the lumen at the proposed re-entry point. This needle creates an aperture in the intima. The antegrade wire is directed to this gap to slide beside the needle and to enter the true lumen.Medicine
Determination of the chemical and electrochemical parameters for a CE system by methods of convolution electrochemistryY.I Moharram 1 March 2004Journal of Electroanalytical ChemistryFor a rapid electron transfer process which follows a reversible chemical step (CE), an analysis procedure is presented for the determination of chemical and electrochemical parameters. It is based on methods of convolution electrochemistry and can be applied to chronoamperometric curves. The main equations of the reported procedure are very simple and are easily analyzed. The analysis procedure has been applied to both simulated and experimental data. Science
Experimental testing of a shallow solar pond with continuous heat extractionM.R.I Ramadan, A.A El-Sebaii, S Aboul-Enein, A.M KhallafSeptember 2004,Energy and Buildings,he thermal performance of a shallow solar pond (SSP) under the batch and open cycle modes of heat extraction has been investigated experimentally. Experiments have been performed during the summer season of 2001 under different operational conditions for the two modes of heat extraction. The pond performance is investigated in terms of the heat loss coefficients and the rates of energy losses and energy collected. science
Composition of bolti (Tilapia nilotica) muscle proteinsM.E. KhalilApril–June 1980Food ChemistryDuring the study described in this paper it was found that the edible portion of bolti fish (Tilapia nilotica) comprises about 36% of its total weight and contains 79·5% moisture, 18·8% crude protein, 0·36% fat and 1·4% ash. The proteins of fresh bolti muscles consist of 66% myosin nitrogen, 25% non-myosin nitrogen and 8·5% insoluble protein nitrogen. The non-protein accounts for 15·3% of the total nitrogen.Agriculture
Ultrasound-guided laryngeal air column width difference and the cuff leak volume in predicting the effectiveness of steroid therapy on postextubation stridor in adult. Are they useful?Ghada F. El-Baradey, Nagat S. EL-Shmaa, Fatma ElsharawyDecember 2016Journal of Critical Care, Volume 36Steroids therapy improves postextubation stridor. Both LACWD and CLV are non-invasive and simple methods for monitoring of laryngeal edema regression after steroid therapy. We recommend administration of corticosteroids to patients with a lower level of leak volume and LACWD before extubation.Medicine
In vitro and in vivo studies of the immunomodulatory effect of Echinacea purpurea on dendritic cellsN.E. El-Ashmawy, E.A. El-Zamarany, M.L. Salem, H.A. El-Bahrawy, G.M. Al-Ashmawy5 August 2013Journal of Genetic Engineering and Biotechnology, Volume 13, Issue 2,Extracts of Echinacea have been used traditionally for the treatment of diverse types of infections and wounds. They have become very familiar immunostimulant herbal medicine. However, the specific immunomodulatory effect of Echinacea remains to be elucidatedPharmacy
Spectral and thermal studies of 4-(1H-pyrazolo {3,4-d} pyrimidin-4-ylazo) benzene-1,3-diol complexes of cobalt(II), nickel(II) and copperM. Gaber, K.Y. El-Baradie, Y.S.Y. El-Sayed2, February 2008Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy-(1H-Pyrazolo {3,4-d} pyrimidin-4-ylazo) benzene-1,3-diol was synthesized and characterized by various spectral and analytical techniques. Semiempirical quantum calculations using the AM1 method have been performed in order to evaluate the geometry and electronic structure of the title azodye in the ground state. The complex formation between Co(II), Ni(II) and Cu(II) ions and the title azodye was studied conductometrically and spectrophotometrically. The spectrophotometric determination of the title metal ions and titration using EDTA are reported. Co(II), Ni(II) and Cu(II) complexes of the title azodye have been synthesized and characterized by elemental analysis, conductivity, magnetic susceptibility, IR, UV-Vis and thermal analysis (TGA and DTA).The spectral and magnetic data suggested the octahedral geometry for Co(II) and Ni(II) complexes while Cu(II) complexes have square planar geometry. The thermal studies confirmed the chemical formulations of the title complexes. The thermal degradation takes place in two or three steps depending on the type of the metal and the geometry of the complexesScience
Effect of gadolinium substitutions on the structure and electrical conductivity of Ni-ferriteM.Z SaidMarch 1998,Materials Lettersshows that they are cubic spinel (single phase). The lattice parameter a, theoretical density science
Comparison, determination and optimizing the conditions required for rhizome and shoot formation, and flowering of in vitro cultured calla explantsMohsen K.H Ebrahim10 September 2004Scientia HorticulturaeThereafter, four subcultures were made in liquid media similar to the latter one. Shoots produced developed rhizomes and/or rooted plantlets depending on the culture conditions. Rhizomes were successfully formed on MS-basal media containing sucroseScience
Adsorptive stripping voltammetric quantification of the antipsychotic drug clozapine in bulk form, pharmaceutical formulation and human serum at a mercury electrodeE. Hammam, A. Tawfik, M.M. Ghoneim21 September 2004Journal of Pharmaceutical and Biomedical Analysis,Using the cyclic voltammetry technique and the Britton–Robinsonscience
Groundwater quality assessment of the shallow aquifers west of the Nile Delta (Egypt) using multivariate statistical and geostatistical techniquesAlaa A. Masoud July 2014ournal of African Earth SciencesExtensive urban, agricultural and industrial expansions on the western fringe of the Nile Delta of Egypt have exerted much load on the water needs and lead to groundwater quality deterioration. Documenting the spatial variation of the groundwater quality and their controlling factors is vital to ensure sustainable water management and safe use. A comprehensive dataset of 451 shallow groundwater samples were collected in 2011 and 2012. On-site field measurements of the total dissolved solids (TDS), electric conductivity (EC), pH, temperature, as well as lab-based ionic composition of the major and trace components were performed. Groundwater types were derived and the suitability for irrigation use was evaluated. Multivariate statistical techniques of factor analysis and K-means clustering were integrated with the geostatistical semi-variogram modeling for evaluating the spatial hydrochemical variations and the driving factors as well as for hydrochemical pattern
Chromatic stability of light-activated resin and heat-cure acrylic resin submitted to accelerated agingSafa’a A. Asal, Maha M. Fahmy, Saeed M. AbdullaJanuary 2015The Saudi Journal for Dental Research, Volume 6, Issue 1, January 2015, Pages 41-47Several denture base resins providing easier/or faster processing have recently been introduced. Even though these materials have improved physical properties, their color stability is also of vital interest.Dentistry
Diatoms from the Quaternary sediments of the Nile Delta, Egypt, and their palaeoecological significanceAbdelfattah A. Zalat2, February 1995Journal of African Earth Sciences,This study represents the first contribution describing diatom taxa from the Quaternary sediments of the Nile Delta, Egypt. A total of 99 diatom species and varieties belonging to 28 genera were identified. The palaeoecological conditions during the time of deposition (pH salinity, eutrophication and dissolved silica concentration) are discussed. Deposition of the Quaternary Nile Delta sediments occurred in slightly alkaline, fresh water of oligohalobian type, which was of variable trophic status with a high dissolved silica concentration. The variations visible in the ratio of planktic to epiphytic and benthic diatoms generally reflect shallow environments with water-level changes related to climatic fluctuationsScience
Biochemical and immunopathological changes in experimental neurotoxocariasisAhmad A. Othman, Ghada A. Abdel-Aleem, Eman M. Saied, Wael W. Mayah, Afaf M. ElatrashJuly 2010Ahmad A. Othman, Ghada A. Abdel-Aleem, Eman M. Saied, Wael W. Mayah, Afaf M. ElatrashToxocariasis is a widespread soil-transmitted parasitic disease. Toxocara canis larvae migrate through the tissues with a special predilection for the central nervous system. Recently, neurotoxocariasis is being diagnosed in humans with increasing frequency due to improved diagnostic tools.Medicine
Effects of preoperative oral beta blocker versus intraoperative nitroprusside or esmolol on quality of surgical field during tympanoplastyYasser Mohamed Amr, Sabry M. AminNovember 2011Journal of Clinical Anesthesia, Volume 23, Issue 7Although the three drugs are acceptable for obtaining an optimum surgical field, preoperative oral beta blocker appeared to be rapid in onset and was simpler to implement.Medicine
Dielectric behaviour in Ni-Al ferrites at low frequenciesM.A. Ahmed, M.K. El Nimr, A. Tawfik, A.M. El Hasab July 1991Journal of Magnetism and Magnetic MaterialsThe peak shifts to lower frequency due to increasing aluminium substitution. The abnormal behaviour of the dielectric is explained due to two types of charge carriers. The temperature dependence of the dielectric relaxation frequency is measured and the activation energy of the dielectric relaxation is calculated.Science
Gastroprotective effect of garlic in indomethacin induced gastric ulcer in ratsNahla E. El-Ashmawy, Eman G. Khedr, Hoda A. El-Bahrawy, Hend M. SelimJuly–August 2016Nutrition, Volume 32, Issues 7–8, Garlic, in its natural plant state, has a great history in ancient medicine as a remedy for many diseases. In our study, the gastroprotective effect of aged garlic extract (AGE) and the possible underlying mechanisms were investigated in an experimental model of indomethacin-induced gastric ulcer.Pharmacy
A prospective randomised comparative study of endoscopic band ligation versus injection sclerotherapy of bleeding internal haemorrhoids in patients with liver cirrhosisAtif ElSayed Awad, Hanan Hamed Soliman, Sabry Abdel Latif Abou Saif, Abdel Monem Nooman Darwish, Samah Mosaad, Asem Ahmed ElfertJune 2012Arab Journal of Gastroenterology, Volume 13, Issue 2Both EBL and EIS were effective in the treatment of bleeding internal haemorrhoids in patients with liver cirrhosis. EBL had significantly less pain and higher patient satisfaction than EIS. EBL was also safer in patients with advanced cirrhosis.Medicine
Effect of indomethacin on postsurgical edema in ratsMohamed M. Amin, Milton B. Engel, Daniel M. LaskinMarch 1983Oral Surgery, Oral Medicine, Oral Pathology, Volume 55, Issue 3, March 1983, Pages 244-246The effectiveness of intramuscular indomethacin was compared with that of hydrocortisone succinate for the control of edema resulting from experimentally induced surgical trauma in rats. Both drugs produced a significant reduction in tissue water, but no difference could be detected between the effects of the two drugs. These findings indicate the advisability of clinical trials of indomethacin in the control of postsurgical swelling and pain.Dentistry
Synthesis of poly(vinylbenzyltriphenylphosphonium)-bound nucleophilic reagents and their applications for anionic activation in nucleophilic substitutionsM. Hassanein, A. Akelah, F. Abdel-Galil 5, 1985European Polymer JournalInsoluble polymer-bound nucleophilic reagents derived from poly(vinylbenzyltriphenylphosphonium chloride) have been prepared by treatment with the sodium salts of carboxylic acids, benzenesulphinic acid and phenols. These reagents were used for the synthesis of carboxylic acid esters, sulphones and C/O-alkylation of phenols by reactions with alkyl halides. In addition to the ease and simplicity of the method and regeneration of the polymeric by-product, Science
Experimental investigation on concrete-filled stainless steel stiffened tubular stub columnsM.A. Dabaon , M.H. El-Boghdadi , M.F. Hassanein, February 2009,Engineering StructuresThis paper presents an experimental investigation on concrete-filled normal-strength stainless steel stiffened tubular stub columns using the austenitic stainless steel grade EN 1.4301 (304). The stiffened stainless steel tubes were fabricated by welding four lipped angles or two lipped channels at the lips. Therefore, the stiffeners were formed at the mid-depth of the sections. In total, five hollow columns and ten concrete-filled columns were tested. The longitudinal stiffener of the column plate was formed to avoid shrinkage of the concrete and to behave as a continuous connector between the concrete core and the stainless steel tube. The behavior of the columns was investigated using two different nominal concrete cubic strengths of 30 and 60 MPa.Engineering
Fabrication of a custom-made ceramic post and core using CAD-CAM technologyMohamed Abdelmageed Awad, Thamer Yousif MarghalaniAugust 2007The Journal of Prosthetic Dentistry, Volume 98, Issue 2, August 2007, Pages 161-162Most commercially available esthetic post systems rely on the use of a prefabricated post component that is incorporated into the definitive post. The use of a prefabricated post made out of either composite resin or ceramic materials requires preparation of the canal to the size and shape of the post. This is usually followed by either adding a composite resin core to the post after post cementation or, alternatively, heat pressing a ceramic core onto the ceramic post during its fabrication.Dentistry
Pathogenesis of restricted movements in trichinellosis: An experimental studyDalia S. Ashour, Reda H. ElbakaryMay 2013,Experimental Parasitology, Volume 134, Issue 1Trichinellosis is a zoonosis acquired by the ingestion of insufficiently cooked pork meat containing the encapsulated larvae of Trichinella spiralis. Trichinellosis is presented with myalgia which affects various muscle groups; its intensity is usually related to the severity of the disease and may cause restriction of joint movement. However, joint pain in the course of trichinellosis could not be explained entirely by myositis. This study investigated the other possible causes of restricted movements of joints in animal model. We found that the histopathological changes in the joints of T. spiralis infected rats were in the form of inflammatory cellular infiltrates and ulceration in the synovial membrane with degeneration and ulceration of the articular cartilage. Immunohistochemical examination of the joints revealed the presence of T. spiralis local antigen or immune complex deposited in the synovial membrane. Leukocytosis and eosinophilia were observed throughout the experimental period but eosinophil level declined slowly but still elevated. In conclusion, the restricted movements during the course of trichinellosis seem to be not only due to direct invasion of muscles by the encapsulated T. spiralis larvae but also due to immune complex deposition in the joints.Medicine
Accuracy of magnetic resonance imaging in diagnosis of deeply infiltrating endometriosisMohamed Fouad Sherif, Manal Ezzat Badawy, Dina Gamal Eldeen Y. ElkholiMarch 2015Mohamed Fouad Sherif, Manal Ezzat Badawy, Dina Gamal Eldeen Y. ElkholiObjective To determine the accuracy of MRI and diffusion weighted images in the diagnosis of deep infiltrating endometriosis (DIE). Patients and methods This study included 72 patients (mean age, 28 years; range, 17–41 years). Inclusion criteria were patients who: (a) had a history of symptoms consistent with endometriosis, such as pelvic pain, dysmenorrhea, deep dyspareunia, dyschezia, and infertility; (b) had a pelvic examination revealing thickening of the posterior cul-de-sac and/or nodules; (c) had transvaginal ultrasound showing ovarian cysts with thickened low amplitude echoes. Exclusion criteria were the common contraindications to MRI (pacemaker, metallic foreign bodies, and claustrophobia). MRI was performed using a GE Signa 1.5 T MRI system and no contrast medium was used for imaging. Results In 70/72 patients, DIE was confirmed at surgery and histopathologic examination. 36/72 (50%) patients had endometriotic nodules infiltrating the rectouterine pouch and rectum, 24/72 (33%) the vesicouterine pouch, 6/72 (8.3%) the urinary bladder and 6/72 (8.3%) the anterior abdominal wall. 20/72 patients (27%) had endometrioma correlating with DIE and another 8/72 (11%) had also adenomyosis. Conclusion In conclusion, preoperative MRI is an excellent tool to provide a reasonably accurate mapping of multiple sites of pelvic endometriosis with high accuracy.Medicine
Expression of the signal transducer and activator of transcription factor 3 and Janus kinase 3 in colorectal carcinomas, colonic adenomas and ulcerative colitisMohamed M. Shareef, Maha M. Shamloula, Asem A. Elfert, Mohamed El-sawaf, Hanan H. SolimanMarch 2009Arab Journal of Gastroenterology, Volume 10, Issue 1JAK3 and STAT3, and particularly their activated forms, were found to correlate significantly with the degree of dysplasia in adenomas and UC, indicating their potential role in colorectal carcinogenesis. They also correlate with anaplasia and invasion, suggesting a definitive role in progression of CRC.Medicine
Corrosion behavior of as-received and previously cast high noble alloyMohamed F. Ayad, Stanley G. Vermilyea, Stephen F. RosenstielJuly 2008The Journal of Prosthetic Dentistry, Volume 100, Issue 1, July 2008, Pages 34-40The rationale for using high noble alloys is based largely upon their alleged ability to resist corrosion. However, combining previously cast metal with new alloy might have a detrimental effect on the corrosion behavior of a high noble alloy.Dentistry
Effect of thermocycling on the micro-shear bond strength of solvent free and solvent containing self-etch adhesives to dentinH.Y. El Sayed, A.I. Abdalla, M.E. Shalby, M.E. Essa, D.M. AminMarch 2015Tanta Dental Journal, Volume 12, Issue 1, March 2015, Pages 28-34The aim was to investigate the effect of thermocycling on the microshear bond strength of one solvent free self etch adhesive system, Bond-1SF, and two solvent containing self-etch adhesives, Futurabond DC and Adper Easy One.Dentistry
Oxidation of 2-aminophenol with molecular oxygen and hydrogen peroxide catalyzed by water soluble metalloporphyrinsSahar H. El-Khalafy, M. HassaneinNovember 2012,Journal of Molecular Catalysis A: Chemical,etrakis-(p-sulfonatophenyl)porphinatocobalt(II) and 5,10,15,20-tetrakis-(p-sulfonatophenyl)porphinatomanganese(III) chloride have been used as catalysts for the oxidative coupling of 2-aminophenol to 2-aminophenoxazine-3-one with molecular oxygen and hydrogen peroxide. The effects of pH and concentration of catalysts, hydrogen peroxide and oxygen on the oxidation reaction and yield of 2-aminophenoxazine-3-one have been studied. The oxidation of 2-aminophenol with molecular oxygen catalyzed by cobalt(II) tetra(4-sulfophenyl)porphyrin involves a hydrogen atom abstraction from 2-aminophenol by cobalt(II) superoxo species. UV–vis analysis indicated that oxomanganese(IV) is the active species in the oxidation of 2-aminophenol with hydrogen peroxide and manganese(III)tetra(4-sulfophenyl)
Solar still with condenser – A detailed reviewA.E. Kabeela, , , , Z.M. Omarab, F.A. Essab, A.S. Abdullahc, aJune 2016Renewable and Sustainable Energy ReviewsAccess to potable water to the people is narrowing down day after day all over the world. Most of the human diseases are caused by polluted or non-purified water resources. Water purification without affecting the ecosystem is the necessity of the hour. Solar distillation is one of the water purification techniques producing ultrapure distilled water. Solar still distillation systems offer sustainable tools for freshwater production. Numerous environmental and operational parameters attribute to optimize the still design. Different designs were tested by researchers to improve the productivity of solar still. In their experimentations, the solar still integrated with external or internal condenser is deemed to be effective and efficient design. In this detailed survey, we are seeking to introduce, explain and discuss the status of different solar stills integrated with different condensers arrangements.Engineering
Nonlinear dynamics and chaos of magnetized resonant surface waves in a rectangular containerMagdy A. Sirwah3, April 2013,Wave Motion, n this paper the nonlinear evolution of the three-dimensional instability of resonated standing surface waves along the interface of a weakly viscous, incompressible magnetic liquid within a rectangular basin is investigated. A combination of the Rosensweig instability with Faraday instability is created, where the system is assumed to be stressed by a normal alternating magnetic field together with an external vertical oscillating force. First, it is assumed that the liquid is inviscid and thereby the motion is irrotational, a system of nonlinear coupled evolution equations governing the complex amplitudes of the different modes is derived. Second, a system of linear equations, derived via solving the linearized Navier–Stokes equations, is obtained. Consequently, the nonlinear equations of the complex amplitudes that correspond to the ideal fluid case are modified by adding the linear damping. This system is exploited to determine the steady-state solutions and then studying their stability both analytically and numerically. The results show that the liquid viscosity rather than the magnetic field affects the qualitative behavior of the wave motion and the system response alternates between the regular periodic and chaotic behavior depending on the specific values of some parameters.Science
Synthesis, structural and physical properties of new Terbium containingElsayed Kandyel5, May 2003,Journal of Physics and Chemistry of SolidsSamples with various nominal compositions in the Tb–Hg–Sr–Ca–Cu–O system were prepared and studied by EDX, powder X-ray diffraction including the Rietveld refinement, electrical resistivity, magnetic susceptibility and thermoelectric power measurements. EDX and powder X-ray diffraction studies showed that Tb is required for the stabilization of the 1212Science
Temperature-dependence of creep behaviour of dental resin-compositesS. El-Safty, N. Silikas, D.C. Watts April 2013Journal of Dentistry, Volume 41, Issue 4, April 2013, Pages 287-296To determine the effect of temperature, over a clinically relevant range, on the creep behaviour of a set of conventional and flowable resin-composites including two subgroups having the same resin matrix and varied filler loading.Dentistry
Finite element analysis of skirted foundation adjacent to sand slope under earthquake loadingW.R. Azzam August 2015HBRC JournalThis paper reports the application of using a skirted foundation system to study the behavior of foundations with structural skirts adjacent to a sand slope and subjected to earthquake loading. The effect of the adopted skirts to safeguard foundation and slope from collapse is studied. The skirts effect on controlling horizontal soil movement and decreasing pore water pressure beneath foundations and beside the slopes during earthquake is investigated. This technique is investigated numerically using finite Engineering
Cost analysis for several solar desalination systemsE. El-Bialya, , , S.M. Shalabyb, 1, A.E. Kabeelc, A.M. Fathyd, e15 April 2016DesalinationIn this paper, a detailed cost analysis was presented for various configurations of passive and active solar stills. An Excel program was prepared for calculating the cost analysis parameters for the considered systems. There are only two input parameters; the present capital cost (P) and the annual yield (M = daily average productivity × 260 days). Number of life years was assumed to be 10 years. Cost comparisons between the different passive and active solar stills and with another works were presented; and some conclusions were drawn. Based on the obtained results, it can be concluded that the production cost per liter of potable water using either passive or active solar desalination techniques was more competitive compared to the price per liter in both Egyptian and Saudi markets.Engineering
Effect of implant assisted partial overdenture with neutral zone concept in partially resected mandible restoration on facial contour and bone densityShaimaa A. Mohamed, H.M. Amin, A.A. Sadakah, N.A. KashefAugust 2014Tanta Dental Journal, Volume 11, Issue 2, August 2014, Pages 139-149This study was performed to evaluate the effect of implant assisted partial overdenture located in neutral zone for restoring partially resected mandible on facial contour and bone density.Dentistry
The predictive value of soluble endothelial selectin plasma levels in children with acute lung injuryMohammed A. Al-Biltagi, Ahmed Abd ElBasset Abo-Elezz, Rasha Mohamed Gamal Elshafiey, Ghada Abudelmomen Suliman, Maaly Mohamed Mabrouk, Hossam Ahmed MouradApril 2016Journal of Critical Care, Volume 32The study aimed to evaluate the value of soluble endothelial selectin (sE-selectin) plasma level measurement in predicting acute lung injury (ALI) outcome in children. Methods The study was a prospective, controlled study that involved 50 children with ALI and 50 healthy children as a control. Soluble endothelial selectin and C-reactive protein plasma levels were measured at days 1 and 7 of development of ALI for the patient group and done only once for the control group. Conclusion Plasma sE-selectin level served as a good predictor biomarker for both mechanical ventilation duration and the mortality risk in children with ALI.Medicine
Clinical Significance of Plasma Osteopontin Level in Egyptian Patients with Hepatitis C Virus-related Hepatocellular CarcinomaSahar Saad El-Din Bessa, Nadia Mohamed Elwan, Ghada Abdul Moemen Suliman, Safinaz Hamdy El-ShourbagyOctober 2010Archives of Medical Research, Volume 41, Issue 7,Plasma OPN can be regarded as a promising diagnostic biomarker for HCC in the surveillance of Egyptian patients with HCV infection. It could also serve as an adverse prognostic factor for HCV-related HCC patients.Medicine
Drug interaction and location in liposomes: correlation with polar surface areasG.M.M. El Maghraby, A.C. Williams, B.W. Barry23 March 2005International Journal of Pharmaceutics, Volume 292, Issues 1–2, 23 March 2005, Pages 179-185An important step in liposome characterization is to determine the location of a drug within the liposome. This work thus investigated the interaction of dipalmitoylphosphatidylcholine liposomes with drugs of varied water solubility, polar surface area (PSA) and partition coefficient using high sensitivity differential scanning calorimetry. Lipophilic estradiol (ES) interacted strongest with the acyl chains of the lipid membrane, followed by the somewhat polar 5-fluorouracil (5-FU). Strongly hydrophilic mannitol (MAN) showed no evidence of interaction but water soluble polymers inulin (IN) and an antisense oligonucleotide (OLG), which have very high PSAs, interacted with the lipid head groups. Accordingly, the drugs could be classified as: hydrophilic ones situated in the aqueous core and which may interact with the head groups; those located at the water–bilayer interface with some degree of penetration into the lipid bilayer; those lipophilic drugs constrained within the bilayer.Pharmacy
One year clinical follow up of nano filled glass ionomer and composite resin restorationsA.M. Nassar, A.I. Abdalla, M.E. ShalabyApril 2014Original Research Article Tanta Dental Journal, Volume 11, Issue 1, April 2014, Pages 21-35The authors evaluated the clinical performance of a nano filled glass ionomer restorative material (Ketac N100) and a nano filled composite resin restorations (Grandio SO) with its adhesive (Futurabond DC) in Class V carious lesions over one year.Dentistry
The value of diffusion weighted MR imaging in T staging and correlation with histologic grading in urinary bladder cancerMohamed Fouad Sherif March 2015The Egyptian Journal of Radiology and Nuclear Medicine, Volume 46, Issue 1Accurate predictions for T staging of urinary bladder carcinoma can be made by means of DWI and ADC quantification. ADC value is a beneficial method for providing information about grade of bladder carcinomas.Medicine
Thermo-optical properties of polar dielectric laser dye solventsH. El-Kashef, R. Shalaby1, February 2012Optics & Laser Technology,This paper is concerned with the study of necessary and sufficient optimality conditions for convex–concave fractional disjunctive programming problems for which the decision set is the union of a family of convex sets. The Lagrangian function for such problems is defined and the Kuhn–Tucker saddle and stationary points are characterized. In addition, some important theorems related to the Kuhn–Tucker problem for saddle and stationary points are established. Moreover, a general dual problem is formulated, and weak, strong and converse duality theorems are proved. Throughout the presented paper illustrative examples are given to clarify and implement the developed
P01-34 - Risky behaviors of HIV infection among drug dependents in EgyptH.F. Elsawy, I.M. Al-Kabash2011European Psychiatry, Volume 26, Supplement 1The objective was to study risky behaviors for HIV infection by drug dependents and assess their needs for prevention. Risky behaviors for HIV infection are common among studied addicts. Their risk perception and knowledge about HIV/AIDS was, however, found defective. There is urgent need for outreach programs to increase their awarness about harm reduction meaures. Medicine
Evaluation of circulating ADH and MIC-1 as diagnostic markers in Egyptian patients with pancreatic cancerAmal A. Mohamed, Hanan Soliman, Mohamed Ismail, Dina Ziada, Taher M. Farid, Ahmed M. Aref, Moustfa E. Al Daly, Zakaria Y. Abd ElmageedJanuary–February 2015PancreatologyDespite the incidence rate of pancreatic cancer (PC) is uncommon in developing countries, it is considered as one of the most lethal disease. Improving patients' survival requires diagnosis of the disease at early stage.Medicine
Mechanism of biosynthesis of trimethylamine oxide from choline in the teleost tilapia, Oreochromis niloticus, under freshwater conditionsIbrahaim El-Shourbagy March 2002Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular BiologyThe mechanism of biosynthesis of trimethylamine oxide (TMAO) from dietary precursors in the teleost tilapia (Oreochromis niloticus) was investigated. Diets supplemented with quaternary ammonium choline, glycine betaine, carnitine or phosphatidylcholine were administered and significant increases in TMAO levels in the muscle were only observed with choline. Agriculture
IR spectral studiesO.M. Hemeda 1, October 2004Journal of Magnetism and Magnetic Materials,Infrared spectra were carried out in studies of the ferrite systemScience
New and Simple Methylene Blue Colorimetric Assay for Glycyrrhizin in PharmaceuticalsA.A.M. Habib, N.A. El-Sebakhy, H.A. KadryOctober 1979,Journal of Pharmaceutical Sciences, Volume 68, Issue 10,A new colorimetric method for glycyrrhizin in licorice and drug preparations is given. The method is based on Pharmacy
Variational iteration method for solving wave equationA.A. Hemeda 8, October 2008Computers & Mathematics with Applications,By the variational iteration method the solution of the wave equation in different forms is exactly obtained. The obtained solutions show that the variational iteration method is effective, simple and easy compared with many of the other methods. So it has a wide range of applications in physical and mathematical problems, linear and nonlinear as well. By the variational iteration method the solution of the wave equation in different forms is exactly obtained. The obtained solutions show that the variational iteration method is effective, simple and easy compared with many of the other methods. So it has a wide range of applications in physical and mathematical problems, linear and nonlinear as well. Science
Mathematical and experimental investigation of a solar humidification–dehumidification desalination unitMofreh H. Hameda, , A.E. Kabeelb, , , Z.M. Omaraa, S.W. Sharshira, c16 February 2015,DesalinationIn this paper, performance of a proposed desalination system based on air humidification–dehumidification (HDH) is investigated theoretically and experimentally. To evaluate the performance and productivity of the proposed solar humidification–dehumidification desalination unit, a theoretical simulation model is developed in which the energy equations of each component are considered. Productivity of the proposed system at different operating times during the day is calculated in two periods. First one starts at 9 am and ends at 17 pm, while the second starts after preheating before entering the humidifier at 13 pm to 17 pm. The results show that the highest fresh water productivity is found to be in the second period. A comparison between experimental and theoretical results shows a good agreement and gives evidence that the proposed model is valid to be used under different boundary conditions. The results also show that when the system operates 4 h in a day with preheating before it gives higher productivity of about 22 L/day (11 L/day·m2 of collector) as a result of stored energy in the system since sunrise. The total cost per 1 l for the unit is 0.0578$.Engineering
Behavior of laterally loaded small scale barrettes in sand A.Z. El Wakila, , , Ashraf K. Nazirb, 1, September 2013,Ain Shams Engineering JournalThis paper aims to investigate the response of laterally loaded rectangular cross sectional barrettes. Twenty-eight model tests for laterally loaded barrette were investigated to study the effect of sand relative density, aspect ratio of pile cross section, loading direction and load eccentricity. Based on this study, the lateral resistance of the barrette that loaded in the direction of major axis is higher than that loaded in the direction of minor axis. Sand relative density has significant effect on the lateral capacity of the barrettes. The ratio of the lateral capacity of the barrettes loaded in the direction of major axis compared to the barrettes loaded in the direction of minor axis is reduced as the sand relative density increases. Increasing the flexure stiffness of the barrette cross section causes a reduction in the lateral displacement of the barrette head. Increasing load eccentricity causes a significant reduction in the barrette lateral resistance.Engineering
Brachial artery flow mediated dilatation and carotid intima media thickness measured by high resolution B mode ultrasound in patients with rheumatoid arthritisMohamed A. Amin, Alsiagy A. Salama, Ashraf M. Elaggan, Salwa E. ElsayedMarch 2015The Egyptian Journal of Radiology and Nuclear Medicine, Volume 46, Issue 1FMD% and CIMT are important non-invasive independent imaging methods for early prediction of subclinical atherosclerosis in RA patientsMedicine
Canal configuration of mandibular first premolars in an Egyptian populationHatem A. AlhadainyMarch 2013Journal of Advanced Research, Volume 4, Issue 2, March 2013, Pages 123-128The purpose of this study was to investigate canal configuration of mandibular first premolars in an Egyptian population. Two hundred fifty human extracted mandibular first premolars were collected from Egyptian patients and a small hole in the center of the occlusal surface of each tooth was made perforating the roof of the pulp chamber. Teeth were decalcified by immersing in nitric acid and dehydrated in ascending concentrations of ethyl alcohol. A waterproof black ink was passively injected from the occlusal hole into pulp system and stained teeth were immersed in methyl salicylate solution for clearing. Standardized pictures of the cleared teeth were obtained and anatomical features of the root canal were observed. The average length of the mandibular first premolar teeth was 22.48 ± 1.74 mm, one-rooted teeth were 96.8% and the two-rooted were 3.2%. Vertucci Type I canal configuration represented the highest percentage (61.2%) followed by Type V (16.4%), Type IV (13.2%), Type II (5.6%) and Type III (2.8%). Vertucci Type VI canal configuration represented the lowest percentage (0.4%) and a complex configuration was found in one tooth. Accessory canals were detected in 22.8% and inter-canal connections were observed in 24.8% while 54% showed apical delta. Such knowledge is clinically useful for localization and negotiation of canals of mandibular first premolar, as well as their subsequent management in Egyptian population.Dentistry
Deltamethrin-induced testicular apoptosis in rats: the protective effect of nitric oxide synthase inhibitorMona El-Gohary, Wageh M Awara, Samia Nassar, Samia Hawas1 January 1999Toxicology, Volume 132, Issue 1, 1 January 1999, Pages 1-8This study is the first to examine and characterize the testicular apoptosis which might be induced due to exposure of male rats to deltamethrin. Furthermore, the role which might be played by nitric oxide (NO), as well as the other reactive oxygen species (ROS) in controlling this testicular apoptosis was assessed. Apoptosis was evaluated by DNA fragmentation detected by agarose gel electrophoresis and cellular morphology on testicular tissue sections. It was found that administration of deltamethrin (1 mg/kg daily for 21 days) to animals resulted in characteristic DNA migration patterns (laddering), thereby providing evidence that apoptosis is the major mechanism of cell death in the testicular tissues. In addition, histopathological examination of testicular tissue sections showed that apoptosis was confined to the basal germ cells, primary and secondary spermatocytes. These changes, in addition to the appearance of Sertoli cell vacuoles in deltamethrin-intoxicated animals, indicates the suppression of spermatogenesis. At the same time, the plasma levels of both NO and lipid peroxides measured as malondialdehyde (MDA) were found to be significantly Pharmacy
Changes in some chemical characteristics and lipid composition of salted fermented Bouri Fish muscle (Mugil cephalus)Laila A. El-Sebaiy,Samir M. Metwalli1989Food Chemistry‘Feseekh’ is the traditional name in Egypt of salted-fermented Bouri Fish (Mugil cephalus). The effect of the salting-fermenting process on gross chemical composition was studied. The lipid content decreased from 12·6 to 11·2% in small fish and from 7·5 to 6·3% in large fish accompanied by an increase in peroxide value and production of free fatty acids. Agriculture
A novel chalcone-analogue as an optical sensor based on ground and excited states intramolecular charge transfer: A combined experimental and theoretical studyTarek A. Fayed31 May 2006Chemical PhysicsSteady-state absorption and emission spectroscopic techniques as well as semiempirical quantum calculations at the AM1 and ZINDO/S levels have been used to investigate the intramolecular charge transfer (ICT) behaviour of a novel chalcone namely; 1-(2-pyridyl)-5-(4-dimethylaminophenyl)-penta-2,4-diene-1-one, DMAC.Science
Further investigations of semiconductivity and pyroelectricity for the development of poled and Cd-doped mercury telluride thin film in electronics and engineeringM.M.Abou Sekkina, A. Tawfik, M.I.Abd El-Ati5 December 1984,Thermochimica Acta, Volume 82, Issue 2The crystalline structure, electrical conductivity and pyroelectricity of developed mercury telluride thin films have been investigated in detail. Analysis of data obtained confirms that these properties are in agreement. Consequently, the role of Hg migration, non-stoichiometry, diffusion of impurities and degree of crystallinity are clearly cut. Finally, the optimum conditions were evaluated and recommended for mercury telluride thin films in electronic industries and
Assessment of vinyl chloride-induced DNA damage in lymphocytes of plastic industry workers using a single-cell gel electrophoresis techniqueWageh M Awara, Sobhy H El-Nabi, Mona El-Gohary26 June 1998Toxicology, Volume 128, Issue 1, 26 June 1998, Pages 9-16DNA damage and the formation of stable carcinogen–DNA adducts are considered critical events in the initiation of the carcinogenic process. This study was carried out to assess whether exposure of plastics industry workers to the vinyl chloride monomer (VCM) for different periods of time would cause DNA damage, using the single-cell gel electrophoresis (SCGE) technique. Levels of DNA damage was assessed by both extent of DNA migration and numbers of DNA damaged spots in the peripheral blood lymphocytes from 32 plastics workers with different periods of exposure to VCM; they were evaluated by comparison with a group of non-exposed individuals. It was found that plastics workers who were exposed to VCM for different periods of time showed significantly increased levels of DNA damage compared with the non-exposed subjects. There was a significant correlation between the severity of DNA damage and duration of exposure. However, no significant correlation was found between the age of all subjects and DNA damage. Concentrations of VCM in the air inside the factory were found to be significantly higher than values in non-exposed areas, despite being lower than the threshold limit value (TLV). Our results encourage the application of SCGE as a sensitive, simple, fast and useful technique in the regular health screening of workers occupationally exposed to VCM (even at concentrations below the TLV) to assess the possibility of any DNA damage.Pharmacy
Combination of telmisartan with sildenafil ameliorate progression of diabetic nephropathy in streptozotocin-induced diabetic modeNageh Ahmed El-Mahdy, Magda El-Sayed El-Sayad, Aya Hassan El-KademJuly 2016Biomedicine & Pharmacotherapy, Volume 81Diabetic nephropathy (DN) is a leading cause of end-stage renal disease in the world. Several signaling pathways are involved in the pathogenesis of DN including elevation in level of angiotensin II, formation of advanced glycation end products (AGE), activation of protein kinase c (PKC), and lipid accumulation. These pathways activate one another mutually leading to oxidative stress, Pharmacy
Insights into regulatory molecules of intestinal epithelial cell turnover during experimental infection by Heterophyes heterophyesDalia S. Ashour, Ahmad A. Othman, Dina A. RadiAugust 2014Experimental Parasitology, Volume 143, August 2014Heterophyiasis is an intestinal disease that remains endemic in many parts of the world, particularly the Nile Delta of Egypt and Southeast Asia, yet the populations at risk of infection expand throughout the world. The main histopathological feature of infection is villous atrophy, but the underlying factors are not well understood. Apoptosis of the villous epithelial cells was previously reported to be enhanced during intestinal parasitic infections; however, the role of Heterophyes heterophyes on enterocyte apoptosis was to be explored.Medicine
Lipid changes during germination of fenugreek seeds (Trigonella foenum-graecum)Laila A. El-SebaiyApril 1983Food ChemistryFenugreek seeds were germinated in the dark for 96 h. Total lipid extracts were prepared and found to decrease on germination. Ultraviolet, visible and infra-red spectra were estimated for the lipids of ungerminated and germinated fenugreek seeds. Free fatty acids (FFA)Agriculture
Antimicrobial effect of different intracanal medications on various microorganismsD.A. Attia, A.M. Farag, I.K. Afifi, A.M. DarragMarch 2015Tanta Dental Journal, Volume 12, Issue 1, March 2015, Pages 41-47To compare the antimicrobial effect of Calcium hydroxide paste (CaOH), Chlorhexidine gluconate (CHX) gel and Antibiotic-Corticosteroid paste against Streptococcus mutans, Enterococcus faecalis and Candida albicans in root canal lumen and radicular dentin.Medicine
Behaviour of normal and high strength concrete-filled compact steel tube circular stub columnsEhab Ellobodya, Ben Youngb, , , Dennis LamcJuly 2006Journal of Constructional Steel ResearchThis paper presents the behaviour and design of axially loaded concrete-filled steel tube circular stub columns. The study was conducted over a wide range of concrete cube strengths ranging from 30 to 110 MPa. The external diameter of the steel tube-to-plate thickness (D/t) ratio ranged from 15 to 80 covering compact steel tube sections. An accurate finite element model was developed to carry out the analysis. Accurate nonlinear material models for confined concrete and steel tubes were used. The column strengths and load–axial shortening curves were evaluated. The results obtained from the finite element analysis were verified against experimental results. An extensive parametric study was conducted to investigate the effects of different concrete strengths and cross-section geometries on the strength and behaviour of concrete-filled compact steel tube circular stub columns. The column strengths predicted from the finite element analysis were compared with the design strengths calculated using the American, Australian and European specifications. Based on the results of the parametric study, it is found that the design strengths given by the American Specifications and Australian Standards are conservative, while those of the European Code are generally unconservative. Reliability analysis was performed to evaluate the current composite column design rules.Engineering
Interleukin-23p19 expression in patients with ulcerative colitis and its relation to disease severityHanan El-Bassat, Lobna AboAli, Sahar El Yamany, Hanan Al Shenawy, Rasha A. Al Din, Atef TahaSeptember 2016Advances in Digestive Medicine, Volume 3, Issue 3The purpose of this study was to determine whether the mucosal expression of interleukin (IL)-23p19 has a role in the pathogenesis of ulcerative colitis, and to determine its relation to disease severity. Methods This study was performed on 50 patients with ulcerative colitis and 10 normal individuals as the controls. They were divided into Group I (27 patients with mild to moderate disease), Group II (23 patients with severe disease), and Group III (10 normal individuals). All patients and the controls were subjected to histopathological study, IL-23p19 immunohistochemical staining, IL-23R expression by flow cytometry, and serum IL-23 by enzyme-linked immunoassay. Results There was a significant increase in IL-23p19 gene expression and IL-23R level in patients with ulcerative colitis, compared to the controls. A significant positive correlation was detected between increased expression of the IL-23p19 gene, IL-23R, high serum IL-23, and the severity of the disease. Conclusion Increased expression of the IL-23p19 gene has a role in the pathogenesis of ulcerative colitis. Targeted therapy directed against IL-23p19 may be effective in its treatment. Increased expression of the IL-23p19 gene and IL-23R with high serum IL-23 is correlated positively with disease severity.Medicine
Synthesis, characterization, and theoretical studies of Co(II) and Cu(II) complexesNadia El-Wakiel, Yusif El-Sayed, Mohamed Gaber24 August 2011Journal of Molecular Structureelemental analyses, molar conductance, magnetic susceptibility measurements, IR, electronic as well as ESR spectral studies. The thermal decomposition of the metal complexes was studied by TGA and DTA techniques. The thermo-kinetic parameters; activation energy, pre-exponential factor and entropy of activation were estimated. The interaction between the Schiff base under investigation and the copper nanoparticles in the ground and excited state was considered. The fluorescence quenching rate constant of Schiff base by Cu nanoparticles has a large
ProExC is a novel marker for distinguishing between primary endometrial and endocervical adenocarcinomasGhada E. EshebaJune 2013Journal of the Egyptian National Cancer Institute, Volume 25, Issue 2Background Distinguishing endocervical adenocarcinoma (ECA) from endometrial adenocarcinoma (EMA) is clinically significant and cannot always be made on the basis of morphology alone or clinical findings. The aim of this study was to study the potential utility of ProExC as a new marker for cervical adenocarcinoma, and to evaluate a panel of monoclonal antibodies composed of p16, ER, PR, and vimentin, and assess their diagnostic value in distinguishing between ECA and EMA. Methods Immunohistochemistry using monoclonal antibodies to ProExC, p16, estrogen receptor (ER), progesterone receptor (PR), and vimentin, was performed to examine 30 cases, including 10 ECAs and 20 EMAs. Results Eight out of 10 cases (80%) of ECA were positive for ProExC, whereas only 2 cases of EMA (10%) were positive. The difference of ProExC expression in the two groups of malignancy was statistically significant (p = 0.003). P16 was positive in 8 cases (80%) of ECAs and in 4 cases (20%) of EMAs. Estrogen receptor was negative in all cases of ECA, while it was positive in 95% of EMA. Progesterone receptor was positive in 2 cases (20%) of ECA and in 16 cases (80%) of EMA. Vimentin was positive in only one case (10%) of ECA, and in 16 cases (80%) of EMA. Conclusion ProExC is a novel immunohistochemical marker for differentiating ECA from EMA and its inclusion in a panel of immunohistochemical markers including p16, ER, PR, and vimentin is recommended when there is morphological and clinical doubt as to the primary site of endocervical or endometrial origin.Medicine
Apparent isolation of Toxoplasma gondii from human faecesAdel Mohamed Aly Abbas, Adel Barrada1971Transactions of the Royal Society of Tropical Medicine and Hygiene, Volume 65, Issue 3After repeated abortions a woman had a healthy child followed by 2 children who had choroido-retinitis since birth. These 4 subjects showed Toxoplasma antibodies of moderate titre. Ascaris lumbricoides ova found in the stools of the mother and the healthy child were collected, and after 7 days' incubation, a suspension of non-larvated ova collected from the mother was inoculated orally and subcutaneously into mice. 3 of the 4 mice inoculated orally showed Toxoplasma cysts in their brains. No success attended attempts for further isolation from specimens containing mature ova of the same batch or from other stool specimens collected over 2 years from the mother or healthy child or from 2 female worms and their ova obtained from the motherMedicine
Self-microemulsifying and microemulsion systems for transdermal delivery of indomethacin: Effect of phase transitionGamal M. El Maghraby1 February 2010Colloids and Surfaces B: Biointerfaces, Volume 75, Issue 2, 1 February 2010, Pages 595-600This study investigated the transdermal delivery of indomethacin (model drug) from self-microemulsifying system, microemulsions and their phase transition systems. The study selected five formulations with fixed surfactant–oil ratio and increasing water content. These included a water free self-microemulsifying drug delivery system (SMEDDS),Pharmacy
Physical properties of chemically deposited CdS films for solar cellsM.H. Badawi, S. Aboul-Enein, M. Ghali, G. Hassan May–August 1998Renewable EnergyCdS semiconductor films prepared by chemical-solution growth have been studied. The technique offers the possibility for better control over the preparation processes, because of the slower rate of deposition. Effect of pH value of the solution and its temperature have been correlated. The crystalline structure of the CdS film on glass substrate was wurtzite highly oriented with small amount of cubic phase. The band gap of the film has been estimated from the optical absorption studies under different growth conditions.Science
Role of MRI in differentiating benign from malignant breast lesions using dynamic contrast enhanced MRI and diffusion weighted MRIMohamed Ahmed Youssef, Hanan Mohamed Saleh Elahwal, Mohamed Morsi Alwageeh, Sally Elbially Attya15 February 2017Alexandria Journal of MedicineQuantitative analysis of DWI was done for the 33 breast lesions and their ADC values are recorded at 3 different b-values (250, 600, and 1000). Seventeen lesions showed facilitated diffusion, proved to be benign and 10 lesions showed restricted diffusion, 9 lesions of them proved to be malignant and one proved to be benign. There are 6 lesions showed mixed restricted and facilitated diffusion proved to be malignant.Medicine
Parametric study of a solar air heater with and without thermal storage for solar drying applicationsS. Aboul-Enein, A.A. El-Sebaii, M.R.I. Ramadan, H.G. El-Gohary1 November 2000Renewable Energy transient analytical model is presented for a flat-plate solar air heater with and without thermal storage. The flowing air temperature is assumed to vary with time and space coordinates. Analytical expressions are obtained for various temperatures of the air heater elements as well as for the temperature of the storage material. The performance of the air heater is investigated by computer simulation using the climatic conditions of Tanta science
Toxicity of Aspergillus flavus Cultures Isolated from EgyptM.M. Naguib, M. El-Khadem1976Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologiethe Aspergillus flavus cultures, isolated from Egypt. A wide potential range for aflatoxins B and G groups was obvious among the isolates.Agriculture
Nanomechanical properties of dental resin-compositesS. El-Safty, R. Akhtar, N. Silikas, D.C. WattsDecember 2012Dental Materials, Volume 28, Issue 12, December 2012, Pages 1292-1300To determine by nanoindentation the hardness and elastic modulus of resin-composites, including a series with systematically varied filler loading, plus other representative materials that fall into the categories of flowable, bulk-fill and conventional nano-hybrid types.Dentistry
Theoretical investigation of some experimental data of Al-substituted MnZn spinel ferritesS.A. Saafan, A.S. Seoud, R.E. El Shater1 August 2005Physica B: Condensed MatterIn the present study, we have tried to find the best realistic theoretical methods to analyze experimental data taken for Al-substituted MnZn spinel ferrites. For this purpose, we have followed two approaches. The first was by constructing a master curve for different functions of frequency science
Effect of nitrogen plasma conditions on electrical properties of silicon oxynitrided thin films for flash memory applicationsAkihiro Ikeda, a, , M Abd Elnabyb, Reiji Hattoria, Yukinori Kurokia1 May 2001Thin Solid Filmshin silicon oxynitride films were deposited on Si(100) substrates using nitrogen plasma at various exposure times, followed by thermal oxidation in dry O2 without the use of toxic or global warming gases. Secondary ion mass spectroscopy measurements confirmed that nitrogen is confined to the immediate vicinity of the surface. The damage induced in the thin silicon oxynitride film after exposure to nitrogen plasma for between 10 and 60 s was estimated from an analysis of capacitance–voltage and current–voltage measurements. Generation of different densities of positive oxide charge was observed. Correlation between the local bonding structures in the oxynitride films and the electrically active defective states at the oxynitride/Si interface are also discussed. It is proposed that improved electrical characteristics such as positive charge trapping, interface state density, leakage current, and stress immunity of thin silicon oxynitride films, can be obtained by using an optimal plasma exposure time of approximately 30 s. The preliminary results obtained in this study indicate that these oxynitride films can be considered as potential candidates for ultra-thin gate oxide flash memory applications.Engineering
Changes in distribution of some crucial elements in masseter myofibers following surgically induced traumaMilton B. Engel, Mohamed M. AminJuly 1985Journal of Oral and Maxillofacial Surgery, Volume 43, Issue 7, July 1985, Pages 528-530Experimentally induced surgical trauma of the masseter muscle in rats led to changes in the distribution of some crucial intracellular elements as determined by microprobe analysis. Sulfur, phosphorus, and potassium values were lowered while sodium and chlorine levels were elevated. These changes were accompanied by increased formation of ice crystal artifacts in myofibers. The findings suggest that trauma causes alterations in cytoplasmic macromolecules and in the state of water in the cells. The method of analysis provides a means for the further evaluation of anti-inflammatory drugs.Dentistry
A Randomized Prospective Controlled Study for Assessment of Different Ureteral Occlusion Devices in Prevention of Stone Migration During Pneumatic LithotripsyYasser A. Farahat, Abd-Elhamid M. Elbahnasy, Osama M. ElashryJanuary 2011Urology, Volume 77, Issue 1The use of Stone Cone or N-Trap is valuable during ureteroscopic pneumatic lithotripsy for treatment of proximal ureteral stones. Both devices significantly diminish residual fragments, the incidence of ureteral wall trauma, and the need for the auxiliary procedure. However, the stone cone was more effective in preventing proximal stone migration and the subsequent stone-free rate.Medicine
Goserelin acetate before transurethral resection of moderately enlarged benign prostatic hyperplasia: Prospective randomised-controlled clinical trialMohamed Abo El-Enen, Ahmed Tawfik, Ahmed S. El-Abd, Maged Ragab, Sherin El-Abd, Mohamed Elrashidy, Nehal Elmashad, Mohamed Rasheed, Shawky El-AbdMarch 2016Arab Journal of Urology, Volume 14, Issue 1A single dose of GA, a LHRH agonist, before TURP is safe and effective in reducing surgical blood loss. It significantly reduced MVD in both suburethral and stromal nodular prostatic tissues without regional discrepancy.Medicine
The effect of various fiber reinforced composite post surface treatments on its bond strength to root canal dentinA.A. Younes, M.S. Kamel, M.A. Shakal, A.E. FahmyDecember 2015Tanta Dental Journal, Volume 12, Supplement 1, December 2015, Pages S15-S21Evaluating the effect of various fiber reinforced composite (FRC) post surface treatments on its tensile bond strength to root canal dentin.Dentistry
Ultrasonographic and clinical study of post-stroke painful hemiplegic shoulderDecember 2014,Rania E. Mohamed, Mohamed A. Amin, Ashraf A. Aboelsafa December 2014The Egyptian Journal of Radiology and Nuclear Medicine, Volume 45, Issue 4Ultrasonography is an essential method in evaluation of post-stroke PHS. However, the U/S grades were not correlated with the stages of motor recovery. Avoiding overuse of the unaffected shoulder will be helpful for prevention of shoulder injuries following hemiplegic stroke.Medicine
Antimicrobial efficacy of endodontic irrigation solutions against planktonic microorganisms and dual-species biofilmAbeer M. DarragDecember 2013Tanta Dental Journal, Volume 10, Issue 3, December 2013, Pages 129-137To compare the antimicrobial effect of different irrigation solutions against Enterococcus faecalis (E. faecalis) and Streptococcus mutans (S. mutans) planktonic microorganisms and dual-species biofilm within the root canal.Dentistry
Collagen — Emerging collagen based therapies hit the patient Ensanya A. Abou Neela, Laurent Bozecc, Jonathan Knowlesc, Omaer Syed, Vivek Muderad, Richard Daye, Jung Keun HyunApril 2013Advanced Drug Delivery ReviewsThe choice of biomaterials available for regenerative medicine continues to grow rapidly, with new materials often claiming advantages over the short-comings of those already in existence. Going back to nature, Medicine
The effect of amalgam bonding on the stiffness of teeth weakened by cavity preparationOmar Zidan, Usama Abdel-KeriemNovember 2003Dental Materials, Volume 19, Issue 7, November 2003, Pages 680-685Objective. The objective of this study is to evaluate the effect of amalgam bonding on the stiffness of teeth weakened by cavity preparation. Methods. Strain gages were bonded to maxillary premolars. The rigidity was tested by applying a load to a sequence of sound, prepared and restored teeth as follows: sound tooth, MOD preparation, amalgam restoration, amalgam removed recovering the MOD preparation, bonded amalgam restoration, bonded amalgam removed recovering the MOD preparation, bonded composite restoration. The relative stiffness (RS) and relative deformation (RD) of each condition for each cusp to that of the sound tooth was determined.Dentistry
Electromechanical and pyroelectric properties of ferric acetylacetonate transducerA. Tawfik, O.M. Hemeda March 2003Materials LettersFerric acetylacetonate Fe( was pressed in the form of tablets and polarized at 200 V/mm. The pyroelectric voltage was studied as a function of different temperatures. When the tablet was subjected to high frequency applied ac field, it exhibited a vibration in the thickness mode. It was also found that the mechanical stress decreased the electromechanical coupling factor of the transducer because of the damping effect of the domain wall motion.Science
Penetration enhancers in proniosomes as a new strategy for enhanced transdermal drug deliveryGamal M. El Maghraby, Amal A. Ahmed, Mohamed A. Osmananuary 2015Saudi Pharmaceutical Journal, Volume 23, Issue 1The aim of this work is to investigate penetration enhancers in proniosomes as a transdermal delivery system for nisoldipine. This was performed with the goal of optimising the composition of proniosomes as transdermal drug delivery systems. Plain proniosomes comprising sorbitan monostearate, cholesterol, ethanol and a small quantity of water were initially prepared. Subsequently, proniosomes containing lecithin or skin penetration enhancers were prepared and evaluated for transdermal delivery of nisoldipine. Pharmacy
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Oroantral communication repair using bone substitute and platelets rich fibrinM.H. ElShourbagy, M.M. Hussein, M.S. Khedr, S. Abd ElalJune 2015Tanta Dental Journal, Volume 12, Issue 2, June 2015, Pages 65-70The aim of this study is to evaluate oroantral communication (OAC) repair using one bone substitute (Fisiograft) and platelets rich fibrin (PRF).Dentistry
dL-Filters of principal MS-algebrasAbd El-Mohsen Badawy October 2015Journal of the Egyptian Mathematical SocietyIn this paper the notion of image-filters is introduced and characterized in principal MS -algebras. Also many properties of principal image-filters of a principal MS -algebra are observed and a characterization of the class of all principal image-filters is given. Finally, a relationship between image-filters and congruences on a principal MS-algebra is investigated.Science
Genotoxicity of three endodontic sealers by single cell gel-electrophoresis/comet assayA.M. Darrag, D.M. FayyadAugust 2014Tanta Dental Journal, Volume 11, Issue 2, August 2014, Pages 85-92The aim of this study was to compare the genotoxicity of two MTA-based sealers (MTA Fillapex and MTA Plus) and a RealSeal self etch (SE) sealer.Dentistry
The performance of a modified solar still using hot air injection and PCMA.E. Kabeela, , , , Mohamed Abdelgaieda, M. Mahgoubb1 February 2016DesalinationA double passes solar air collector–coupled modified solar still, with Phase Change Material (PCM), have been experimentally investigated to enhance the freshwater productivity. The influence of the injected hot air on the performance of a modified still, with PCM, is investigated. A comparison between a modified still, with both PCM and hot air injection, and the conventional still is carried out to evaluate the enhancement in the freshwater productivity. The experiments were carried out under the same atmospheric conditions. The experimental results show that, the freshwater productivity approximately reached 9.36 (L/m2 day) for the double passes solar air collector–coupled modified solar still, with PCM, while its value is recorded 4.5 (L/m2 day) for the conventional still. The freshwater productivity of the double passes solar air collector–coupled modified solar still with PCM is 108% higher than that of the conventional still on average. This percentage is obtained during the period from June to July 2015 under the Egyptian climatic conditions.Engineering
Root perforations: A review of literatureHatem A. AlhadainySeptember 1994Oral Surgery, Oral Medicine, Oral Pathology, Volume 78, Issue 3, September 1994, Pages 368-374Root perforations that result in a communication of the root space with the periodontal tissues occasionally occur during endodontic procedures. They may be induced iatrogenically, by resorptive process, or by caries. Identification of root perforations is possible by direct observation of bleeding, indirect bleeding assessment using a paper point, radiography, and an apex locator. Prognosis of a tooth with root perforation depends on the time lapsed before obturation of the perforation, location and size of the lesion, and the sealability of the repair material. Perforation defects may be repaired by nonsurgical or surgical techniques. A review of causes, diagnosis, prognosis, and management of root perforations provides information for avoiding, detecting, and treating of such defects.Dentistry
Immediate effect of balloon valvuloplasty on hemostatic changes in mitral stenosisAdel Zaki, Mai Salama, Magdy El Masry, Mohamed Abou-Freikha, Dosoky Abou-Ammo, Mohamed Sweelum, Eman Mashhour, Abdou Elhendy1 February 2000The American Journal of Cardiology, Volume 85, Issue 3This study was conducted to assess right and left atrial hemostatic function in patients with mitral stenosis (MS) and to investigate the immediate effect of balloon mitral valvuloplasty (BMV) on hemostatic function.Medicine
In vivo and in vitro evaluation of the mutagenic potential of carbamazepine: Does melatonin have anti-mutagenic activity16 January 1998Wageh M Awara, Mona El-Gohary, Sobhi H El-Nabi, Wael A FadelToxicology, Volume 125, Issue 1, 16 January 1998, Pages 45-52The mutagenic potential of carbamazepine (CBZ) therapy has been evaluated both in vivo and in vitro. Analysis of chromosome aberrations (CA),Pharmacy
Investigation of a single-basin solar still with deep basinsS. Aboul-Enein, A.A. El-Sebaii, E. El-Bialy May–August 1998Renewable EnergyA single basin solar still (SBSS) is designed and constructed. A simple transient mathematical model is presented for the still. It is based on analytical solution of the energy-balance equations for different parts of the still. Analytical expressions for temperatures of different components have been obtained. The thermal performance of the still has been investigatedboth experimentally and theoretically. Good agreement between experimental and theoretical results is observed. The influence of cover slope on the daily productivity of the still was investigated. Effect of heat capacity of basin water on the daylight and overnight productivities was also studied. It is inferred that, the productivity of the still decreases with an increase of heat capacity of basin water during daylight and the reverse is the case overnight. The optimum tilt angles of the still cover were found to be 10 and 50° during the summerScience
Cystic echinococcosis in the middle region of the Nile Delta, Egypt: Clinical and radiological characteristicsAlsiagy A. Salama, Ahmad A. Othman, Hanaa A. ZayedSeptember 2014,The Egyptian Journal of Radiology and Nuclear Medicine, Volume 45, Issue 3 Cystic echinococcosis (CE) is a parasitic disease characterized by cystic lesions mainly in the liver. The diagnosis relies on clinical, laboratory, and radiological examination. Aim To explore the clinical, radiological, and biological features of patients with CE in the middle region of the Nile Delta, Egypt. Patients and methods From March 2012 to February 2014, this study was conducted on 45 patients, aged 20–65 years. Patients were subjected to clinical, laboratory, and radiological assessment using conventional X-ray chest, ultrasound and multi-detector CT of the abdomen and chest. Results This study identified the epidemiological, clinical, laboratory, and radiological characteristics of patients with CE in the middle Delta region, Egypt. The CT may display the same findings as US in diagnosing and staging of most cases; however, CT is more superior to US in the evaluation of heavily calcified cysts, small inaccessible cysts, and pulmonary hydatid cysts. Conclusion Biological markers seem neither sensitive nor specific, whereas the serological tests, preferably two different techniques, are useful. Ultrasound showed high accuracy rate, but CT, whenever possible, should be employed as it provides additional diagnostic value.Medicine
Effect of different surface treatments of luted fiber posts on push out bond strength to root dentinS.E. Sultan, A.M. Korsiel, M.S. Kamel, W.M. EtmanDecember 2013Tanta Dental Journal, Volume 10, Issue 3, December 2013, Pages 116-122The purpose of this in vitro study was to evaluate the influence of different post surface treatments on the micro push out bond strength of a luting agent to a fiber post.Dentistry
Diffusion tensor imaging for characterizing white matter changes in multiple sclerosisRasha Elshafey, Omar Hassanien, Mohamed Khalil September 2014The Egyptian Journal of Radiology and Nuclear Medicine, Volume 45, Issue 3Significant increase of MD and decrease of FA and VR from normal appearing white matter of the patients to MRI detected active lesions and the least is inactive plaques comparing with NWM of the control group (P value 0.003 for MD, 0.013 for FA, and 0.014 for VR). Correlation and significant difference between {(increase in MD) and (decrease in FA and VR)} and lesion load (strongest in parietal lobes) and also Kurtzke expanded disability status scale (EDSS) and Kurtzke functional system score (KFS-p). Conclusion DTI–MRI quantitative parameters are good predictors of tissue damage not only in MRI-defined lesions but also in NAWM as a result of Wallerian degeneration and are helpful as diagnostic and prognostic tools.Medicine
Added value of 18-F-FDG-PET/CT in patients with pancreatic cancer: Initial observationEkhlas Abdelmonem Ibrahem Nasr ShabanDecember 2016The Egyptian Journal of Radiology and Nuclear Medicine, Volume 47, Issue 4Purpose The goal of the study was to highlight the added value of 18-F-FDG PET/CT over isolated CT to depict pancreatic tumors, distant metastases, monitor response to treatment and its usefulness in distinguishing fibrosis from residual/recurrence, thus direct biopsy to sites more likely to yield representative tumor tissue. Patients and methods This study included 20 patients for which 18-F-PET/CT scans were performed. A case based analysis was performed in detailed manner for lesions on CT and fused images of 18-F-PET/CT. Statistical analysis including specificity, Sensitivity, negative predictive value (NPV) and positive predictive value (PPV) of each of these modalities was performed. A final diagnosis of metastasis was confirmed by further clinical and radiological workup. Results PET/CT has 100% sensitivity, 88.9% specificity, 91.7% PPV, 100% NPV and 95% accuracy compared to 77.8% sensitivity and 54.5% specificity, 58.3% PPV, 75% NPV and 65% accuracy for CT in diagnosis and monitoring treatment response. Conclusion Combined 18-F FDG PET/CT significantly improves the sensitivity and specificity of isolated CT for depicting pancreatic tumors, distant metastases, monitor response to treatment distinguishing fibrosis from residual/recurrence.Medicine
Gastroenterologists and interventional radiologists: Friends or foes? A multidisciplinary approach for solving gastrointestinal problemsAsem Ahmed Elfert, Ferial Salah El-Kalla March 2011Arab Journal of Gastroenterology, Volume 12, Issue 1While endoscopy used to have more therapeutic abilities than radiology, interventional radiology is now racing to lead the minimally invasive diagnostic and therapeutic techniques in medicine as well as surgery. Expecting the new epidemic of hepatocellular carcinoma, radiologists and gastroenterologists are on the run competing in many procedures that are needed. While some radiologists worry about non-radiologists who “intervene” in radiology, many gastroenterologists defend their specialty. Both gastroenterologists and radiologists are invited to collaborate in diagnosing and treating many diseases. Treatment of upper gastrointestinal bleeds should be multidisciplinary involving a team of gastroenterologists, radiologists and surgeons. The role of the interventional radiologist and surgeon arises only after the failure of the endoscopic treatment. Transjugular intrahepatic portosystemic shunt (TIPS) is the preferred treatment for variceal bleeding after failed endoscopy. As the entire field of gastroenterology continues towards less invasive, safer and more effective means of diagnosing and treating diseases, digestive endoscopy will continue to expand the ways in which this unique and minimally invasive technology can be applied to the benefit of patients. In line with this trend, there will be a decline in simple diagnostic standard endoscopies. Development of new techniques, such as CT colonography and capsule endoscopy will actually increase the demand for digestive endoscopy. The trend of future digestive endoscopy will continue to move from diagnostic to therapeutic modalities.Medicine
Cyclic settlement behavior of strip footings resting on reinforced layered sand slopeMostafa A. El Sawwaf, , Ashraf K. NazirJournal of Advanced ResearchJournal of Advanced ResearchThe paper presents a study of the behavior of model strip footings supported on a loose sandy slope and subjected to both monotonic and cyclic loads. The effects of the partial replacement of a compacted sand layer and the inclusion of geosynthetic reinforcement were investigated. Different combinations of the initial monotonic loads and the amplitude of cyclic loads were chosen to simulate structures in which loads change cyclically such as machine foundations. The affecting factors including the location of footing relative to the slope crest, the frequency of the cyclic load and the number of load cycles were studied. The cumulative cyclic settlement of the model footing supported on a loose sandy slope, un-reinforced and reinforced replaced sand deposits overlying the loose slope were obtained and compared. Test results indicate that the inclusion of soil reinforcement in the replaced sand not only significantly increases the stability of the sandy slope itself but also decreases much both the monotonic and cumulative cyclic settlements leading to an economic design of the footings. However, the efficiency of the sand–geogrid systems depends on the properties of the cyclic load and the location of the footing relative to the slope crest. Based on the test results, the variation of cumulative settlements with different parameters is presented and discussed.Engineering
Comparison of three-dimensional plate versus double miniplate osteosynthesis for treatment of unfavorable mandibular angle fracturesN.H. Al-Tairi, M.M. Shoushan, M.M. Saad Khedr, S.E. Abd-alalJune 2015Tanta Dental Journal, Volume 12, Issue 2, June 2015, Pages 89-98To compare three-dimensional plate versus double-miniplate osteosynthesis for the stability of unfavorable mandibular angle fractures.Dentistry
Effect of Fusarium isolates and their filtrates on respiratory rate and chemical analysis of squash plantsZ. El-Shenawy, M.A.mansour, S. El-Bahrawi1978Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Mikrobiologie der Landwirtschaft, der Technologie und des UmweltschutzesThe highly pathogenic isolate stimulated the emergence of the squash seedlings first, caused, however, the highest death rate of the seedlings finally. Fusarium isolates and their culture filtrates inhibited the respiratory rate of squash plants significantly. Agriculture
Nitric oxide synthase gene G298 allele: Is it a marker for microvascular angina in hypertensive patients?Galal E. Nagib El-Kilany, Ehab Nayel, Sahar HazzaaJuly–September 2004Cardiovascular Radiation Medicine, Volume 5, Issue 3,eNOS gene polymorphism is proved to be an important etiology in microvascular angina (x- syndrome) among hypertensive patients. In addition, the eNOS mutant gene showed a significant increase in isolated HPN and in patients with CADMedicine
Histopathological and immunohistochemical alterations in rat heart after thyroidectomy and the role of hemin and ketoconazole in treatmentEhab Tousson, Ehab M. Ali, Wafaa Ibrahim, Rana M. Ashraf December 2012Biomedicine & Pharmacotherapy, Volume 66, Issue 8The heart is a major target organ for thyroid hormone action and marked changes occur in cardiac function in the case of hypo- or hyperthyroidism. Also, thyroid hormone has a significant regulatory effect on the rate of heme oxidation in the liver. Heme oxygenase (HO) is a heme-catabolizing enzyme that converts heme into biliverdin, iron and carbon monoxide.Medicine
X-ray diffraction and IR absorption in the systemI.M Hamada3, May 2004,Journal of Magnetism and Magnetic Materials,X-ray diffraction patterns and IR spectra were carried out on the compositionsScience
Corrigendum to “Testosterone, gonadotropins and androgen receptor during spermatogenesisNahla El-Sayed El-Shazly Omran November 2012Reproductive Biology,Endocrine regulation of reproductive processes of the snail Biomphalaria alexandrina is poorly recognized. Thus, the aims of the study werescience
Protective effects of 1-methylcyclopropene and salicylic acid on senescence regulation of gladiolus cut spikesF.A.S. Hassan, E.F. Ali24 November 2014Scientia HorticulturaeReports indicate that senescence in cut flowers is accelerated. Therefore, the effects of 1-methylcyclopropene (1-MCP) or salicylic acid (SA) on the postharvest quality of gladiolus cut flowers and whether these treatments can regulate the flower senescence were investigated.Agriculture
Cement kiln dust and coal filters treatment of textile industrial effluentsEsawy Kasem Mahmoued31 May 2010DesalinationEffluent discharge from textile industries to neighbouring water bodies and wastewater treatment systems is currently causing significant health concerns to environmental regulatory agenciesAgriculture
Effect of endodontic irrigation solutions on microhardness of root canal dentineA.A Saleh, W.M EttmanJanuary 1999Original Research Article Journal of Dentistry, Volume 27, Issue 1, January 1999, Pages 43-46Methods: Eighteen freshly extracted maxillary incisors were used in this experiment. The crowns of teeth were sectioned at the cemento–enamel junction. The root canals were instrumented to an apical size #50 file, and irrigated with saline solution. The prepared roots were divided equally into two groups each of nine roots. Each root was sectioned transversely into cervical, middle and apical segments. The three sections of each root were separately mounted in a metal chuck with acrylic resin. The coronal dentine surfaces of the root segments were polished. The microhardness of the dentine was measured for the purposes of control data Dentistry
Further investigations on the thermoelectrical and photochemical properties of 2,5-distyrylpyrazine (DSP) and azodiisobutyronitrile (AIBN) single crystalsM.M. Abou-Sekkina1 June 1986Thermochimica Acta DC-electrical conductivity has been studied for fresh and partially photopolymerized 2,5-distyryl-pyrazine (DSP) single crystalsScience
Because of the complexity of reconstructive surgical techniques, the high failure rate and cost of the devices used, as well as the associated mechanical malfunctions there is need for an alternative operation to treat post-prostatectomy urinary incontinence. We present a new procedure along with promising results in cases of simple post-prostatectomy incontinence after transurethral resection of the prostate or open prostatectomy. Materials and Methods The principles of our technique include lysis of the pelvic urethra with preservation of the neurovascular bundle, as well as suspension of the prostatic capsule to the anterior abdominal wall. With this technique we corrected post-prostatectomy sphincteric incompetence in 21 patients. Preoperative evaluation included physical examination, excretory urography, ascending urethrocystography and urethrocystoscopy. Urodynamic investigations included uroflowmetry, cystometrography and urethral pressure profilometry. The patients were reevaluated radiologically and urodynamically 3 months postoperatively. Mean followup was 19 months. Results All patients tolerated the procedure well. Few intraoperative and postoperative complications were encountered. The success rate was 81 percent and these 17 patients became continent day and night. Conclusions Our procedure combines the continence enhancing features of pelvic urethral elongation, urethral suspension, angulation of the prostatomembranous junction and prostatic fixation. The preliminary success rate of this technique is encouraging. However, larger numbers of patients and long-term followup are needed to confirm our findings.M. Elsharaby, O. Abo-Farha, M. Rasheed, A. Omar, A. Elgamasy, G. Ghoniem December 1996The Journal of Urology, Volume 156, Issue 6Because of the complexity of reconstructive surgical techniques, the high failure rate and cost of the devices used, as well as the associated mechanical malfunctions there is need for an alternative operation to treat post-prostatectomy urinary incontinence. We present a new procedure along with promising results in cases of simple post-prostatectomy incontinence after transurethral resection of the prostate or open prostatectomy. Materials and Methods The principles of our technique include lysis of the pelvic urethra with preservation of the neurovascular bundle, as well as suspension of the prostatic capsule to the anterior abdominal wall. With this technique we corrected post-prostatectomy sphincteric incompetence in 21 patients. Preoperative evaluation included physical examination, excretory urography, ascending urethrocystography and urethrocystoscopy. Urodynamic investigations included uroflowmetry, cystometrography and urethral pressure profilometry. The patients were reevaluated radiologically and urodynamically 3 months postoperatively. Mean followup was 19 months. Results All patients tolerated the procedure well. Few intraoperative and postoperative complications were encountered. The success rate was 81 percent and these 17 patients became continent day and night. Conclusions Our procedure combines the continence enhancing features of pelvic urethral elongation, urethral suspension, angulation of the prostatomembranous junction and prostatic fixation. The preliminary success rate of this technique is encouraging. However, larger numbers of patients and long-term followup are needed to confirm our findings.Medicine
Voltammetry and quantification of the contraceptive drug norethisterone in bulk form and pharmaceutical formulationM.M. Ghoneim, A.M. Abushoffa, Y.I. Moharram, H.S. El-Desoky17 January 2007Journal of Pharmaceutical and Biomedical Analysis, Volume 43, Issue 2, 17 January 2007, Pages 499-505The electrochemical behavior of norethisterone at the mercury electrode was studied in the universal buffer of various pH values using dc-polarography, cyclic voltammetry and controlled-potential electrolysis. Norethisterone was reduced at the mercury electrode via the consumption of two electrons corresponding to reduction of the 3-keto-delta-4-group in the A-ring of the moleculePharmacy
Sloshing waves in a heated viscoelastic fluid layer in an excited rectangular tankMagdy A. Sirwah3 October 2014Physics Letters AIn this paper, we have investigated the motion of a heated viscoelastic fluid layer in a rectangular tank that is subjected to a horizontal periodic oscillation. The mathematical model of the current problem is communicated with the linearized Navier–Stokes equation of the viscoelastic fluid and heat equation together with the boundary conditions that are solved by means of Laplace transform. Time domain solutions are consequently computed by using Durbin's numerical inverse Laplace transform scheme. Various numerical results are provided and thereby illustrated graphically to show the effects of the physical parameters on the free-surface elevation time histories and heat distribution. The numerical applications revealed that increasing the Reynolds number as well as the relaxation time parameter leads to a wider range of variation of the free-surface elevation, especially for the short time
Combination of tadalafil and diltiazem attenuates renal ischemia reperfusion-induced acute renal failure in ratsAlaa E. El-Sisi, Samia S. Sokar, Sally E. Abu-Risha, Hanaa A. IbrahimDecember 2016Biomedicine & Pharmacotherapy, Volume 84Life threatening conditions characterized by renal ischemia/reperfusion (RIR) such as kidney transplantation, partial nephrectomy, renal artery angioplasty, cardiopulmonary bypass and aortic bypass surgery, continue to be among the most frequent causes of acute renal failure. The current study investigated the possible protective effects of tadalafil alone and in combination with diltiazem in experimentally-induced renal ischemia/reperfusion injury in rats. Possible underlying mechanisms were also investigated such as oxidative stress and inflammation. Rats were divided into sham-operated and I/R-operated groups. Anesthetized rats (urethane 1.3 g/kg) were subjected to bilateral ischemia for 30 min by occlusion of renal pedicles, tPharmacy
Repair of orthodontically induced root resorption by ultrasound in humansTarek El-Bialy, Iman El-Shamy, Thomas M. GraberAugust 2004American Journal of Orthodontics and Dentofacial Orthopedics, Volume 126, Issue 2, August 2004, Pages 186-193Root resorption is an adverse outcome of orthodontic tooth movement. In addition to the iatrogenic response and compromising the crown-root ratio, root resorption has led to increased malpractice litigation against orthodontists. A clinically acceptable method of treating root resorption has not been validated in the literature to date. Previous research has shown that low-intensity pulsed ultrasound (LIPUS) can enhance healing of various types of traumatized connective tissues and stimulate dental tissue formation. The purpose of this study was to evaluate the effect of LIPUS on the healing process of orthodontically induced tooth-root resorption in humans. Twelve orthodontic patients who were seeking orthodontic treatment that necessitated extracting the first premolars before mechanotherapy participated in this study. For each patient, buccally activated springs were used to tip the maxillary first premolars buccally, with an initial force level of 50 g; the springs were checked weekly to ensure continuous force levels. A short period of LIPUS was applied to 1 side of each patient's mouth, with the other side used as a control. After 4 weeks, the experimental premolars of all patients were extracted, and the premolars of 6 patients were studied by scanning electron microscopy (SEM); the premolars of the other 6 patients were studied histologically. The number and total area of resorption lacunae as examined by SEM were compared between the LIPUS-treated and the control premolars with a t test. The SEM study showed a statistically significant decrease in the areas of resorption and the number of resorption lacunae in the LIPUS-exposed premolars. Histologic examination showed healing of the resorbed root surface by hypercementosis. The results of this study provide a noninvasive method for reducing root resorption in humans.Dentistry
Ellagic acid protects against carrageenan-induced acute inflammation through inhibition of nuclear factor kappa B, inducible cyclooxygenase and proinflammatory cytokines and enhancement of interleukin-10 via an antioxidant mechanismNagla A. El-Shitany, Eman A. El-Bastawissy, Karema El-desokyApril 2014International Immunopharmacology, Volume 19, Issue 2, April 2014, Pages 290-299There are several hypotheses that explain the process of acute inflammation, including free radical overproduction, pro-inflammatory enzyme activation, and release of pro-inflammatory cytokines. In this study, the protective role of ellagic acid against carrageenan-induced acute inflammation was assessed. Pharmacy
Effect of Three Nematicides on the Growth of Some Phytopathogenic Bacteria and FungiM. El-Khadem, F. Mehiar, M.S. Embabi1977Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische MikrobiologieThe effect of three nematicides, aldicarb, fensulfothion, and phenamiphos at four concentrations (1, 5, 25, and 125 ppm) was tested on the growth of five bacteria, Agrobacterium tumefaciens, Corynebacterium fascians, Erwinia carotovora, Pseudomonas solanacearum, and Streptomyces scabies and four fungi, Fusarium oxysporum f. sp. vasinfectum, Agriculture
The venous island flap: is it purely venous?H.A. Shalaby, M.A. Saad1993British Journal of Plastic Surgery, Volume 46, Issue 4Histological study of the pedicles of long and short saphenous and cephalic venous flaps in fresh human cadavers and two clinical cases showed that one or two arterioles and multiple capillaries were present in the perivenous areolar tissue. This challenges the concept that these flaps are purely venous.Medicine
One year clinical follow up of a silorane-based versus a methacrylate-based composite resinR.M. Attia, W.M. Etman, T.M. GenaidApril 2014Tanta Dental Journal, Volume 11, Issue 1, April 2014, Pages 12-20To report one year clinical performance of two types of composite (silorane based versus methacrylate based) in class I preparations.Dentistry
Effect of cycocel and spacings on the growth and volatile oil of Cymbopogon citratusHosny M. EllabbanMay 1978Scientia HorticulturaeCymbopogon citratus, lemongrass, plants were sprayed with cycocel (0, 250, 500, 1000 or 2000 p.p.m.) twice at 2 plant spacings (50 and 75 cm). Significant decreases were noted in the height of the plants and the fresh weight of the above-ground plant parts due to CCC. The percentage of volatile oil in the fresh above-ground parts was increased with a rise in its percentage of citral. The volatile oil content per plant increased with increasing concentration of CCC up to 500 p.p.m. and then tended to decrease.Agriculture
Tumor markers of breast cancer: New prospectivesAhmed M. Kabel16 January 2017Journal of Oncological Sciences, In Press, Corrected Proof, Available online 16 January 2017Tumor markers are substances produced by the tumors or by other cells of the body in response to cancer or certain benign conditions. Although most of these markers are made by the normal cells as well as by cancer cells, they are produced at much higher levels in cancerous conditions. These markers are used to evaluate the patient's response to treatment and to detect the presence of metastasis or recurrence. Breast cancer is one of the most common malignancies in females worldwide. The CA 27-29, CA 15-3, CA27.29, carcinoembryonic antigen, tissue polypeptide specific antigen, p53, cathepsin D, cyclin E, nestin and HER-2 are tumor markers that are often expressed in people with breast cancer. They play a crucial role in diagnosis, monitoring response to therapy, early detection of metastasis and determination of recurrence in patients with breast cancer.Medicine
Effect of pharmaceutical excipients on the permeability of P-glycoprotein substrateA.M. Al-Mohizea, F. Zawaneh, M.A. Alam, F.I. Al-Jenoobi, G.M. El-Maghraby2014,Journal of Drug Delivery Science and Technology, Volume 24, Issue 5, 2014, Pages 491-495Present investigation evaluated permeability enhancing potential of pharmaceutical excipients (HPMC, PVP, Tween-80, Cremophor EL, Cremophor RH40, Transcutol, Labrasol and pluronics F-68) on the intestinal permeability of a P-glycoprotein substrate (domperidone). Everted and non-everted rat gut sacs were used for permeability studies. The investigation revealed that serosal to mucosal (S-M) transport of domperidone was greater than the mucosal to serosal (M-S) transport, which indicates that net movement of domperidone was towards lumen. Further, it was observed that S-M flux of domperidone was reduced by surfactant such as Tween-80, Cremophor EL, Cremophor RH40, Transcutol, Labrasol and pluronics F-68. Pluronics F-68 showed inhibitory effect at higher concentration (0.8 % w/v), but no significant inhibition was observed at lower concentrations. Polymers like HPMC and PVP did not produce any remarkable effect on the permeability of domperidone. The findings suggested that some of the excipients may be used to increase the permeability and absorption of P-gp substrates. However, their role should be confirmed at molecular level and clinical relevance of these findings should be evaluated.Pharmacy
Effect of mechanical load cycling on the marginal integrity of adhesive Class I resin composite restorationsA.I. Abdalla, C.L. DavidsonMarch 1996Journal of Dentistry, Volume 24, Issues 1–2, January–March 1996, Pages 87-90Objectives: The purpose of this study was to determine the effect of cycle loading on the sealing capacity of different adhesive systems in Class I restorations in vitro.Dentistry
The effect of water storage on micro-shear bond strength of contemporary composite resins using different dentin adhesive systemsM.M. Kamel, H.Y. Elsayed, A.I. Abdalla, A.M. DarragApril 2014Tanta Dental Journal, Volume 11, Issue 1, April 2014, Pages 47-55To evaluate effect of water storage on micro-shear bond strength of adhesives to class I cavity-bottom dentin using two types of composites resin.Dentistry
Study of DC conductivity and relative magnetic permeability of nanoparticle NiZnFe2O4/PPy compositesS.A. Saafan, T.M. Meaz, E.H. El-GhazzawyJune 2011Journal of Magnetism and Magnetic Materials,By comparing the results it is found that there is an obvious increase in DC conductivity of the ferrite/PPy composite samples compared to the corresponding pure ferrite samples, whereas compared to the pure PPy sample there is a decrease in DC conductivity. On the contrary, the magnetic permeability of the composites is higher than that of the pure PPy sample and lower than that of the pure ferrite samples as was expected.Science
Thermal and spectral studies of 5-(phenylazo)-2-thiohydantoin and 5-(2- hydroxyphenylazo)-2-thiohydantoin complexesSamir S. Kandil, Gad B. El-Hefnawy, Eman A. Baker27 May 2004Thermochimica Acta,TG studies confirmed the chemical formulations of these complexes and showed that their thermal degradation takes place in three to five steps, depending on the type of the ligand and the geometry of the complexscience
Preparation and application of functional polymers Preparation of vinyl ethers and thioethers using polymer-supported phosphonium saltsAhmed Akelah 7, 1982European Polymer JournalInsoluble polystyryldiphenyl-methoxymethyl- and methylthiomethyl-phosphonium chlorides have been prepared by treating polystyryldiphenylphosphine with chloromethylmethyl-ether and thioether respectivelyScience
Liquid chromatographic determination of fluoxetineOriginal Research ArticleMohamed A El-dawy, Mokhtar M Mabrouk, Fawzy A El-Barbary15 October 2002Journal of Pharmaceutical and Biomedical Analysis, Volume 30, Issue 3, A simple, accurate and sensitive high pressure liquid chromatographic technique is described for the determination of fluoxetine in Pharmacy
A transient solution of the state-dependent queue: M/M/1/N with balking and reflecting barrierM.O. Abou-El-AtaApril 1993Microelectronics ReliabilityIn this paper, we derive the probability that the system sizeEngineering
Anti-fibrotic potential of human umbilical cord mononuclear cells and mouse bone marrow cells in CCl4- induced liver fibrosis in miceNageh Ahmed Elmahdy, Samia Salem Sokar, Mohamed Labib Salem, Naglaa Ibrahim Sarhan, Sherin Hamed Abou-ElelaMay 2017Biomedicine & Pharmacotherapy, Volume 89, May 2017, Pages 1378-1386Liver fibrosis is the consequence of hepatocyte injury that leads to the activation of hepatic stellate cells (HSC). The treatment of choice is Liver transplantation; however, it has many problems such as surgery-related complications, immunological rejection and high costs associated with the procedure. Stem cell-based therapy would be a potential alternative, so the aim of this study is to investigate the therapeutic potential of human umbilical cord mononuclear cells (MNC) and mouse bone marrow cells (BMC) against Pharmacy
Correlation of respiratory pump function with symptomatology in COPDGhada A. AttiaJanuary 2016Egyptian Journal of Chest Diseases and Tuberculosis, Volume 65, Issue 1Staging criteria for COPD include symptoms and lung function parameters, but the role of respiratory pump function parameters in determining disease severity remains unclear.Medicine
Augmentation of solar still performance using flash evaporationA.M. El-Zahabya, A.E. Kabeela, , , , A.I. Bakrya, S.A. El-agouza, O.M. HawambJuly 2010DesalinationA new design of a stepped solar desalination system with flashing chamber is experimentally investigated. The main objective of the investigation was to study the performance of step-wise water basin coupled with a spray water system by augmenting desalination productivity through using two air heaters. The effect of using the spray system for seawater is investigated experimentally at different velocities of the water spray's holder and flow rates on the performance of the solar still in a previous work by El-Zahaby et al. [1]. In the present work, the effect of the inlet sea water temperature and the power consumed by the two air heaters (at both 100 and 250 rpm and water flow rates 3.635, 4.0 and 9.333 l/h) on the performance of the proposed solar system are investigated. It is found that the productivity and performance of the system are significantly positive dependent on both inlet sea water temperature and the power consumed. They decrease with the increase of inlet impure water temperature. At 250 rpm the productivity and efficiency increase with the power consumed to a certain limit after which they begin to decrease gradually while at 100 rpm the productivity and also the efficiency decrease with the power consumed gradually.Engineering
Changes in phytate and minerals during germination and cooking of fenugreek seedsAhmed Rafik El-MahdyOctober 1982Food ChemistryThe effects of germination, cooking and roasting on the phytic acid content, total phosphorus, water soluble inorganic phosphorus and mineral content of fenugreek seeds have been estimated. After 96 h germination, the dry weight of fenugreek seeds decreased while total ash content increased. Agriculture
Simultaneous determination of loratadine and pseudoephedrine sulfate in pharmaceutical formulation by RP-LC and derivative spectrophotometryM.M Mabrouk, H.M El-Fatatry, Sherin Hammad, Abdel Aziz M Wahbi24 November 2003Journal of Pharmaceutical and Biomedical Analysis, Volume 33, Issue 4, 24 November 2003, Pages 597-604Highly sensitive, simple and accurate reversed phase liquid chromatographic and first derivative spectrophotometric methods for determination of antihistaminic drug loratadine Pharmacy
Confinement effect of stiffened and unstiffened concrete-filled stainless steel tubular stub columnsMohamed Dabaon, Saher El-Khoriby, Mahmoud El-Boghdadi, Mostafa Fahmi Hassanein, August–September 2009Journal of Constructional Steel ResearchThis paper presents a comparative study between stiffened and unstiffened concrete-filled stainless steel hollow tubular stub columns using the austenitic stainless steel grade EN 1.4301 (304). Finite element analysis of concrete-filled stainless steel unstiffened tubular stub columns is constructed herein based on the confined concrete model recently available in the literature. It is then compared with the experimental results of concrete-filled stainless steel stiffened tubular stub columns. The stiffened stainless steel tubular sections were fabricated by welding four lipped angles or two lipped channels at the lips. The longitudinal stiffener of the column plate was formed to avoid shrinkage of the concrete and to act as a continuous connector between the Engineering
Ultra-low-dose naloxone added to fentanyl and lidocaine for peribulbar anesthesia: A randomized controlled trialHoda Alsaid Ahmed Ezz, Rehab Said ElkalaApril 2015Egyptian Journal of Anaesthesia, Volume 31, Issue 2Purpose was to evaluate the quality of the block and the duration of postoperative analgesia when ultra-low-dose of naloxone added to fentanyl and lidocaine for peribulbar anesthesia. Addition of ultra-low-dose naloxone to fentanyl and lidocaine for peribulbar anesthesia prolongs the duration of postoperative analgesia without increasing the adverse effects.Medicine
Evaluation of two different reinforcing materials used with silicone auricular prosthesesM.Y. Abd El-Fattah, H.M. Rashad, N.A. Kashef, M.A. El EbiaryAugust 2013Tanta Dental Journal, Volume 10, Issue 2, August 2013, Pages 31-38Clinical and laboratory evaluation of the effect of addition of polyurethane sheets or polypropylene fibers as reinforcing materials to silicone that was used in auricular prostheses.Dentistry
Abolishing cadmium toxicity in Chlorella vulgaris by ascorbic acid, calcium, glucose and reduced glutathioneAmal H. El-Naggar, Mostafa M. El-Sheekh 2, 1998Environmental Pollutionsignificantly accelerated the growth and chlorophyll content of Chlorella vulgaris. This enhancement was found to be dose
Use of serum leptin and insulin hormones levels as predictors of pregnancy outcome in pregnant women with history of recurrent early pregnancy lossAyman Abd-Elaziz El-Dorf, Ahmed Mohamed Eid Ossman, Ahmed El-Sayed El-Halwagy, Hesham Mohamed Borg, Enaam Salah Abd-ElBarMarch 2016Middle East Fertility Society Journal, Volume 21, Issue 1Higher levels of leptin and insulin were found in cases with early RPL especially in the aborted cases. The two hormones could be used as predictors of pregnancy continuation in these cases.Medicine
Sorption and diffusion of phenols onto well-defined ordered nanoporous monolithic silicasS.A El-Safty1 April 2003Journal of Colloid and Interface Sciencehe isothermal sorption and the kinetic parameters were discussed and it was established that a diffusion-controlled process characterizes phenol sorption. Furthermore, the mechanism of phenol sorption was deduced to be predominantly particle diffusion. The diffusion coefficients were determined using Fick's equation. The trend of diffusion of all phenols onto nanoporous silica was HOM-8>HOM-2>HOM-6>HOM-5>HOM-1>HOM-3, reflecting the effect of the uniform pore size distribution and the internal surface area of the nanostructured silicas on the diffusion
Can diffusion weighted MRI differentiate between benign and malignant hepatic focal lesions?Manal E. Badawy, Manal Hamesa, Ashraf Elaggan, Abd Elmonem Nooman, Mamdouh GabrSeptember 2013The Egyptian Journal of Radiology and Nuclear Medicine, Volume 44, Issue 3Diffusion-weighted imaging (DWI) offers the possibility to obtain criteria for characterization of focal liver lesions with subsequent differentiation between benign and malignant hepatic focal lesions without the need for contrast agent administration-by quantifying diffusion effects via apparent diffusion coefficient (ADC) measurements.Medicine
Neglected neck femur fractures in adolescents and young adults: factors predicting the surgical outcomeMostafa A. Ayoub, Hossam M. GadJanuary 2013Journal of Orthopaedic Science, Volume 18, Issue 1The average postoperative follow-up was 25.3 months; 94.4 % of the cases had solid union in a mean of 19.6 weeks. Functionally, the Harris hip score averaged 87.8 points. Nonunion, avascular necrosis and coxa vara complicated two, two and four cases, respectively. Fair and poor radiological results were related to coxa vara and avascular necrosis, respectively. Nonunion was significantly related to posterior comminution, type II neglected fracture, and a neglect of more than 45 days. Age groups more than 30 years old and postoperative neck-shaft angles <140° were significantly associated with late-onset radiological healing and nonunion. Conclusions Cannulated screw osteosynthesis augmented by autogenous bone and bone marrow grafting is a simple, easy-to-perform surgical procedure with encouraging clinical outcomes for selected patients complaining of that difficult problem.Medicine
Self dispersing mixed micelles forming systems for enhanced dissolution and intestinal permeability of hydrochlorothiazideAmal A. Sultan, Sanaa A. El-Gizawy, Mohamed A. Osman, Gamal M. El Maghraby1 January 2017Colloids and Surfaces B: Biointerfaces, Volume 149,Amal A. Sultan, Sanaa A. El-Gizawy, Mohamed A. Osman, Gamal M. El MaghrabyPharmacy
Improving the performance of stepped solar stillA.S. Abdullah, DesalinationDesalinationIn this paper, the experimental performance of a stepped solar still coupled with a solar air-heater was investigated. A single slope passive solar still (conventional still) and stepped active solar still integrated with a solar air-heater collector were fabricated with Engineering
Influence of Co, Ni and Zn substitution for Cu on the structural and superconducting properties E Kandyel, M.A Sekkina1 October 2002Journal of Physics and Chemistry of Solids, Electrical resistivity and magnetic susceptibility measurements show that the value of the superconducting critical temperatureScience
The effects of subgingival application of ozonated olive oil gel in patient with localized aggressive periodontitis. A clinical and bacteriological studyM.Y.M. Shoukheba, Sh.A. AliApril 2014Tanta Dental Journal, Volume 11, Issue 1, April 2014, Pages 63-73This study evaluates the effect of subgingival application of ozonated olive oil gel as an adjunct to scaling and root planing (SRP) in aggressive periodontitis.Dentistry
Multiplicative linear search for a brownian target motionAbd El-Moneim Anwar Mohamed, Mohamed Abd El-Hady Kassem, Mohamed Abd Allah El-Hadidy 9, September 2011Applied Mathematical ModellingThis paper investigates a search problem for a brownian target motion on one of n-intersected real lines in which any information of the target position is not available to the searchers all the time. We have n-searchers start searching for the target from the origin that is the intersection point of these lines. Each of the searchers moves continuously along his line in both directions of the starting point. The purpose of this paper is to formulate a search model and find the condition under which the expected value of the first meeting time between one of the searchers and the target is finite. Also, we show the existence of the optimal search plan which minimizes the expected value of the first meeting time and find it.Science
Silymarin prevents adriamycin-induced cardiotoxicity and nephrotoxicity in ratsNagla A. El-Shitany, Sahar El-Haggar, Karema El-desokyJuly 2008Food and Chemical Toxicology, Volume 46, Issue 7,Adriamycin is a potent anticancer agent, its clinical use is limited for its marked cardiotoxicity and nephrotoxicity. The present study aimed to investigate the possible protective role of the natural antioxidant silymarin on ADR-induced heart and kidney toxicity. Studies were performed on four groups of rats. 1 – control group, 2 – silymarin group (50 mg/kg), 3 – adriamycin group (10 mg/kg), 4 – adriamycin + silymarin group. On the third day after ADR injection, plasma was separated for determination of LDH, CPK, cholesterol and total lipids. 30 days after ADR injection, plasma was separated for determination of creatinine and urea levels. Frozen heart specimens (72 h) and frozen kidney specimens (30 days) were used for estimation of lipid peroxides and GSH contents. Histopathological examinations of heart and kidney sections were also done. Pretreatment of ADR-treated rats with silymarin resulted in a significant decrease in the plasma CPK, LDH, creatinine and urea. On the other hand silymarin pretreatment did not change ADR-induced hyperlipidemia. Silymarin pretreatment significantly decreased the myocardial MDA contents. In addition, silymarin pretreatment normalized renal tissue contents of MDA and GSH. Histopathological examination of heart and kidney sections revealed that ADR caused only mild myocardial injury in silymarin pretreated rats. Also, silymarin pretreatment inhibited ADR-induced renal tubular damage in rats. These results have suggested that, silymarin ameliorated ADR-induced cardiotoxicity and protected against ADR-induced nephrotoxicity in male albino rats. The mechanisms of silymarin induced protection against ADR-induced toxicities were proved to be due to inhibition of lipid peroxidation and protection against GSH depletioPharmacy
Effect of endodontic irrigation and dressing procedures on the shear bond strength of composite to coronal dentinSahar E. Abo-HamarJanuary 2013Journal of Advanced Research, Volume 4, Issue 1, January 2013, Pages 61-67This study aimed to evaluate the effects of three sodium hypochlorite (NaOCl)-endodontic irrigation procedures used alone or in combinations with two intermediate dressing materials on bond strengths of two adhesive composite systems to coronal dentin. Surfaces were treatedDentistry
Stripping voltammetric quantification of the anti-diabetic drug glipizide in bulk form and pharmaceutical formulationE.M. Ghoneim, M.A. El-Attar, E. Hammam, P.Y. Khashaba2 March 2007Journal of Pharmaceutical and Biomedical Analysis, Volume 43, Issue 4The electrochemical behavior of glipizide at the hanging mercury drop electrode (HMDE) was studied in B–R universal buffers of pH 1.7–11. The voltammograms exhibited a well-defined 4-electron irreversible cathodic peak which attributed to reduction of the two CPharmacy
Thyroid dysfunction in systemic lupus erythematosus and rheumatoid arthritis: Its impact as a cardiovascular risk factorHanan El-saadany, Manal Abd Elkhalik, Timour Moustafa, Enam Abd El bar April 2014 The Egyptian Rheumatologist, Volume 36, Issue 2A significantly higher TSH level was found in SLE patients compared to RA patients and controls. No significant difference was present between the RA patients and controls. Anti-TPOabs and anti-TGabs were more frequently detected in SLE (85% and 55%) compared to RA (50% and 37.5%). Abnormal thyroid function tests were detected in SLE, RA patients and controls in 52.5%, 17.5% and 10%, respectively. Subclinical hypothyroidism was the most common abnormality present followed by clinical hypothyroidism then euthyroid sick syndrome in both SLE and RA patients. A positive anti-CCP and high disease activity score (DAS28) in RA were among the strongest independent determinants of cardiovascular disease. Conclusion Thyroid dysfunction is frequent in SLE and RA patients. Those with thyroid dysfunction had increased cardiovascular risk.Medicine
Treatment modalities of TMJ ankylosis: experience in Delta Nile, EgyptR.F. Elgazzar, A.I. Abdelhady, K.A. Saad, M.A. Elshaal, M.M. Hussain, S.E. Abdelal, A.A. SadakahApril 2010International Journal of Oral and Maxillofacial Surgery, Volume 39, Issue 4, April 2010, Pages 333-342The study reports the authors’ experience in managing TMJ ankylosis in Delta Nile, Egypt (1995–2006) and compares the surgical modalities used. 101 patients (109 joints) were reviewed in this retrospective study. Pre- and postoperative assessment included history, radiological and physical examination, and mouth opening. Age, sex, aetiology, joint(s) affected, surgical modality, complications and follow up periods were evaluated. Various types (fibrous, fibro-osseous and bony) of TMJ ankylosis were diagnosed; trauma was the commonest aetiology. The patients’ age range was 2–41 years, 62% were female, and the follow up period ranged from 14 to 96 months. Average mouth opening was significantly increased from 5.3 mm pre-operatively to 32.9 mm 12 months postoperatively (P = 0.0001). Marked improvement in mouth opening was documented when the ramus-joint complex was reconstructed using distraction osteogenesis (34.7 mm), costochondral graft (34.4 mm) and Surgibone (34.6 mm). Gap arthroplasty showed least satisfactory mouth opening compared with other techniques (P = 0.001). Minor and major complications were encountered in 33% of cases, including 5% recurrence rate. Early release of TMJ ankylosis; reconstruction of the ramus height with distraction osteogenesis or bone grafting combined with interpositional arthroplasty, followed by vigorous physiotherapy is successful for managing TMJ ankylosis.Dentistry
Effect of long term-administration of aspartame on the ultrastructure of sciatic nerveEbtsam F. OkashaDecember 2016Journal of Microscopy and Ultrastructure, Volume 4, Issue 4Aspartame is the most widely used artificial sweetener worldwide. There is much controversy about the effect of aspartame on different cells in the body. The aim of this study was to evaluate the effect of aspartame on the structure of the sciatic nerve. Thirty adult male albino rats were divided into three groups. Medicine
Comparison of Indian subcontinent and Middle East acute heart failure patients: Results from the Gulf Acute Heart Failure RegistryPrashanth Pandurangaa, Ibrahim Al-Zakwanib, Kadhim Sulaimana, Khalid Al-Habibc, Alawi Alsheikh-Alid, Jassim Al-Suwaidif, Wael Al-Mahmeedg, Hussam Al-Falehc, Abdelfatah Elasfarh April 2016Indian Heart JournalTo compare Middle East Arabs and Indian subcontinent acute heart failure (AHF) patients.Medicine
Sleep disorders in children with chronic kidney diseaseAmira H. Darwish, Hend Abdel-NabiSeptember 2016International Journal of Pediatrics and Adolescent Medicine, Volume 3, Issue 3Sleep disturbances are very common among children with CKD. Sleep disturbances in patients with CKD include restless legs syndrome (RLS), excessive daytime sleepiness (EDS), sleep-disordered breathing (SDB), behavioral insomnias, and parasomnias.Medicine
Erratum to “Fluorescence characteristics and photostability of benzoxazole derived donor–acceptor dyes in constrained media” [Spectrochimica Acta Part A 65Tarek A. Fayed, Safaa El-Din H. Etaiw5, December 2006Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqScience
A study on parametric multiobjective programming problems without differentiabilityA.-Z.H. El-Banna12, December 1993Computers & Mathematics with Applications,Great efforts have been done for studying basic notions like the solvability and stability sets for parametric multiobjective programming problems of the first and second kind. In this paper, these notions have been defined and analyzed without differentiability assumptions on the considered functions. New stability notions like the stability sets of the third and fourth kind have been also defined and analyzed for this problem.Science
Compositional stability and marginal accuracy of complete cast crowns made with as-received and recast type III gold alloyMohamed F. AyadFebruary 2002Original Research Article The Journal of Prosthetic Dentistry, Volume 87, Issue 2, February 2002, Pages 162-166Statement of Problem. The effect of combining new and recast metal on the compositional stability of the alloy used and accuracy of the final restoration is not known. Purpose. This study characterized the elemental compositional stability of as-received and recast type III gold alloy. The effect of combining these alloys on the marginal accuracy of complete cast crowns also was evaluated. Material and Methods. Sixty standardized type III gold alloy complete crowns were made on epoxy resin dies duplicated from a metal master die with conventional laboratory techniques.Dentistry
Corrigendum to “Non-linear analysis of creeping flow on the inclined permeable substrate plane subjected to an electricKadry Zakaria, Magdy A. Sirwah, Sameh A. AlkharashiOctober 2012nternational Journal of Non-Linear Mechanics,Kadry Zakaria, Magdy A. Sirwah, Sameh A. Alkharashiscience
The use of functionalized polymers as polymeric reagents in solid phase organic synthesis. A reviewAhmed Akelah3, June 1988,Reactive Polymers, Ion Exchangers, Sorbents, he application of functionalized polymers in solid-phase organic synthesis for solving the problems which accompany conventional chemical reactions and for providing the possibility of automation in chemical procedures is described. A breif description of the synthesis of functionalized polymers and the effect of polymer structure and properties on their reactivity as well as an explanation of potential advantages and disadvantages of using polymeric reagents will also be discussed. The polymer's properties cab be modified either by chemical reactions on pendant groups or by changing the physical nature of the polymers, such as their physical form, solvation behavior, porosity, and stability. Such properties have a great importance for the functionalization reactions and for the eventual application of the reactive polymers, and must be considered during the design of a polymeric reagent. However, all these properties in turn depend on the conditions employed during resin preparation and the degree of crosslinkiing of the resin as determined by the extent of swelling. Some exmples will be described in order to develop the principles associated with the main utilization of functionalized polymers as polymeric reagents in solid-phase organic synthesis.Science
Preparation of poly(methyl methacrylate) based resins with bound chromium (VI) reagents and their use as M. Hassanein, El-Saied A. Aly, Y.A. Abbas, Samia M. El-Sigeny April 1992,European Polymer Journal,Insoluble polymeric dichromate and chlorochromate reagents were prepared by modification of poly(methyl methacrylate-co-divinylbenzene) beads with ethylene diamine followed by treatment of the resulting resin with excess methyl iodide and subsequent reaction with aqueous chromium trioxide or chromium trioxide and benzyltriethylammonium chloride respectively. These polymeric reagents were found selectively to oxidize alcohols to the corresponding carbonyl compounds. In addition to easy work-up of the reaction mixture, the resulting polymeric by-product could be simply regenerated and re-used.Medicine
Medical thoracoscopic versus ultrasound guided transthoracic pleural needle biopsy in diagnosis of pleural lesionsAli M. Abdella, Gehan H. AboEl-Magd, Khaled A. Dewan, Dina A. ElgoharyJanuary 2016Egyptian Journal of Chest Diseases and Tuberculosis, Volume 65, Issue 1Medical thoracoscopy is an important diagnostic method for the diagnosis of undiagnosed pleural effusion while it is concluded that US guided pleural biopsy is more useful in cases of pleural lesions without effusion.Medicine
Canine location in different maxillomandibular relationships in Egyptians and SaudisSafa’a Asal, Sharifa A. Al-Shehri, Hoda M.A. RashadJanuary 2011The Saudi Dental Journal, Volume 23, Issue 1, January 2011, Pages 37-42The standards or proportions commonly used as guides for the selection of maxillary anterior teeth for a removable prosthesis have been developed mainly on Caucasian populations with normal ridge relationships.Dentistry
Marginal microleakage of composite resin restorations bonded by desensitizing one step self etch adhesiveH.Y. El Sayed, A.I. Abdalla, M.E. ShalbyDecember 2014Tanta Dental Journal, Volume 11, Issue 3, December 2014, Pages 180-188The aim of this study was to investigate the effect of desensitizing agents on microleakage of composite resin restorations bonded by one step desensitized self etch adhesive.Dentistry
Preparation and properties of CdS thin films prepared on cold substrate as a window layer for solar cellsS. Aboul-Enein, M.H. Badawi, M. Ghali, G. Hassan May–August 1998Renewable EnergyCdS films, usually, prepared on hot substrate at temperature range from 180 to 220°C. The electrical properties of the films are dependent on many parameters such as film thickness, deposition rate, film structure and substrate temperature. To control all these parameters to get film resistivity suitable for manufacturing solar cells, it needs a lot of precautions. CdS prepared on cold substrate could be the solution for this problem. Evaporation of CdS film at constant evaporation rate, then annealed in open air up to 600°C according to the film thickness. The resultant film have been studied. The properties of the films were comparable to the films prepared by the other methods with less control complexity.Science
Contribution of power Doppler and gray-scale ultrasound of the median nerve in evaluation of carpal tunnel syndrome Rania E. Mohamed, Mohamed A. Amin, Ashraf A. Aboelsafa, Salwa E. ElsayedMarch 2014The Egyptian Journal of Radiology and Nuclear Medicine, Volume 45, Issue 1,Aim of the work To assess the role of gray-scale and power Doppler ultrasound (US) of the median nerve at the wrist in evaluating carpal tunnel syndrome (CTS).Medicine
Effect of surface treatment on roughness and bond strength of a heat-pressed ceramicMohamed F. Ayad, Nadia Z. Fahmy, Stephen F. RosenstielFebruary 2008The Journal of Prosthetic Dentistry, Volume 99, Issue 2, February 2008, Pages 123-130Bonding ceramic restorations to tooth structure relies on treatment of the ceramic intaglio surface, selection of a suitable resin luting agent, and appropriate treatment of prepared tooth structure. Various ceramic surface treatments have been advocated which produce different topographies and bond strengths, but little information is available to identify the interaction between the resulting surface topography and bond strength.Dentistry
Retraction notice to “Geology and petrogenesis of Neoproterozoic migmatitic rock association, Hafafit Region, Eastern Desert, Egypt: Implications for syntectonic anatectic migmatites”Gaafar El Bahariya2, July 2010Lithos, Volume 118,Eastern Desert, Egypt: Implications for syntectonic anatectic migmatitesScience
Catalytic activity of polyaniline/MnO2 composites towards the oxidative decolorization of organic dyesAli H. Gemeay, Rehab G. El-Sharkawy, Ikhlas A. Mansour, Ahmed B. Zaki5 April 2008Applied Catalysis B: Environmental,The kinetics of the oxidative reaction of the textile dyes: direct red 81 (DR-81), indigo carminescience
Paraoxonase-1 activity, malondialdehyde and glutathione peroxidase in non-alcoholic fatty liver disease and the effect of atorvastatinWaleed Samy, Mohammed A. Hassanian June 2011Arab Journal of Gastroenterology, Volume 12, Issue 2Patients with NAFLD show enhanced oxidative stress which may lead to non-alcoholic steatohepatitis (NASH). Reduced PON1 activity and increased MDA could be considered a biochemical marker for lipid peroxidation, which require follow-up in patients with NAFLD. Atorvastatin may have a role in prevention of, or delay, the transformation of liver steatosis into NASH.Medicine
Evidences for antiosteoporotic and selective estrogen receptor modulator activity of silymarin compared with ethinylestradiol in ovariectomized ratsNagla A. El-Shitany, Sahar Hegazy, Karema El-desokyFebruary 2010Phytomedicine, Volume 17, Issue 2,Recently, growing multiple uses of silymarin (SIL) as a complementary and alternative medicine, for alcohol-induced liver disease, acute and chronic viral hepatitis, as well as some other nonhepatic indications have been reported. Therefore, more attention should be paid for the hormonal side effects of SIL.Pharmacy
Effect of atorvastatin and methotrexate on solid Ehrlich tumorA.A.M. Habib, N.A. El-Sebakhy, H.A. KadryOctober 1979European Journal of Pharmacology, Volume 713, Issues 1–3, A new colorimetric method for glycyrrhizin in licorice and drug preparations is given. The method is based on coupling the acidic genin, glycyrrhetinic acid, with methylene blue and measuring the extinction of the coupled compound solution in chloroform-alcoholPharmacy
Effect of neoadjuvant chemotherapy on breast cancer phenotype, ER/PR and HER2 expression – Implications for the practising oncologist Renu Gahlauta, Aneliese Bennetta, Hiba Fatayerb, Barbara J. Dallc, Nisha Sharmac, Galina Velikovad, Tim Perrend, David Dodwelld, Mark Lansdownb, Abeer M. ShaabanJune 2016European Journal of CancerTo assess the effect of neoadjuvant chemotherapy (NACT) on breast cancer characteristics, hormone receptors and human epidermal growth factor receptor 2 (HER2) expression and whether testing should be repeated on residual tumours.Medicine
Expression of estrogen receptors (ER) and human epidermal growth factor receptor 2 (HER2) in mucoepidermoid carcinoma: Relationship to its gradingR.H. El-Attar, E.M. DerazDecember 2014Tanta Dental Journal, Volume 11, Issue 3, December 2014, Pages 194-198Mucoepidermoid carcinoma (MEC) is one of the most common malignant salivary gland neoplasms. It represents diverse biological aggressiveness and prognosis. Estrogen receptors (ER) are activated by sex hormone Estrogen. HER2 is a member of epidermal growth factor receptors. Both ER and HER2 have been implicated in the pathogenesis and prognosis of many neoplasms particularly breast. Little is known about their role in MEC.Dentistry
System reliability with common-cause hazard to obey an exponential power modelM.A. El-Damcese April 1997Microelectronics Reliability,A model is proposed for the analysis of systems subject to common-cause failures that are not considered constant and assume that they obey an exponential power model. To represent common-cause failures,science
A regional and paleoenvironmental study on the Upper Cretaceous deposits of the Bahariy OasisA.M. Allam4, 1986,Journal of African Earth Scienceshe Bahariya Oasis represents an anticline with a major prevailing NE-SW major fault system. The present regional geological study proved that the Earth movement has undergone large changes in the sedimentary facies as well as lateral variation in the thickness of strata. These sedimentary rocks range in age from Cenomanian to Oligocene. The chronological sequence of the studied beds as well as the structure of the oasis are dealt with. The distribution of the sediment and its faunal association in the Upper Cretaceous deposits led to the distinction of three major phases of sedimentation which are also discussed in detail.Science
Effectiveness of different final irrigation solutions on smear layer removal in intraradicular dentinA.M. DarragAugust 2014Tanta Dental Journal, Volume 11, Issue 2, August 2014, Pages 93-99To compare smear layer removal after root canal final irrigation with 17% Ethylenediaminetetraacetic acid (EDTA), 10% citric acid (CA), Biopure MTAD, and 0.2% chitosan solutions.Medicine
Impact of different temperatures on survival and energy metabolism in the Asian citrus psyllid, Diaphorina citri KuwayamaIbrahim El-Shesheny, Faraj Hijaza, Ibrahim El-Hawary, Ibrahim Mesbah, Nabil KillinyFebruary 2016Comparative Biochemistry and Physiology Part A: Molecular & Integrative PhysiologyTemperature influences the life history and metabolic parameters of insects. Asian citrus psyllid (ACP), Diaphorina citri is a tropical and subtropical pest. ACP invaded new regions around the world and threatened the citrus industry as a vector for Huanglongbing (HLB) disease.Agriculture
Exploration of a cuprate superconductor YBa2CuMorsy M. Abou-Sekkina 5, February 2000Materials LettersThe kinetics of oxidative decomposition of Erythrosin B dye using the 123-copper superconductor was studied carefully in aqueous solution under condition of pseudo first-order reaction. Many of the kinetic parameters were investigated in this paper. Results obtained indicated that the rate of oxidative decomposition of Erythrosin B dye was found to be pH-dependent. Furthermore, the effect of added KCl and SDS anionic surfactant on the reaction rate reveals an increase in the case of KCl and its decrease in the case of the SDS surfactant. A mechanism was proposed and the activation parameters were calculated for this oxidative decomposition
Effects of rosiglitazone and aspirin on experimental model of induced type 2 diabetes in rats: focus on insulin resistance and inflammatory markersAmany A. Abdin, Amal A. Baalash, Hala E. HamoodaMay–June 2010Journal of Diabetes and its Complications, Volume 24, Issue 3Both insulin resistance and decreased insulin secretion are major features of the pathophysiology of type 2 diabetes. Inflammatory pathways are found to be critical in mechanisms underlying insulin resistance, which is a major determinant of increased risk of cardiovascular complications in type 2 diabetes, and so, it is a potential therapeutic target. Thiazolidinediones (e.g., rosiglitazone) act primarily as insulin sensitizers and were discovered to have anti-inflammatory effects leading to reevaluation of their potential use in treatment of diabetes. Acetyl salicylic acid (aspirin), which is currently recommended for cardiovascular disease (CVD) or even CVD risk factors, is shown to ameliorate diabetic process.Medicine
Measurement of glomerulus diameter and Bowman's space width of renal albino ratsTaras Kotyka, , Nilanjan Deyb, , Amira S. Ashour, Dana Balas-Timare, Sayan Chakraborty , Ahmed S. AshourApril 2016Computer Methods and Programs in BiomedicineGlomerulus diameter and Bowman's space width in renal microscopic images indicate various diseases. Therefore, the detection of the renal corpuscle and related objects is a key step in histopathological evaluation of renal microscopic images.Medicine
Su1543 A Prospective Randomized Comparative Study of Endoscopic Band Ligation and Sclerotherapy of Bleeding Internal Hemorrhoids in Egyptian Patients With Liver CirrhosisAtif Awad, Hanan Soliman, Sabry Abou Saif, Abd Elmonem N. Darwish, Samah Mosaad, Asem A. ElfertApril 2011Gastrointestinal Endoscopy, Volume 73, Issue 4: Endoscopic band ligation (EBL) is a safe and effective method for treating symptomatic second and third degree hemorrhoids [1].Takahiro et al. [2], in their retrospective study, concluded that endoscopic injection sclrotherapy (EIS) is superior to EBL with regard to long-term effectiveness and complications. The aim of our study was to evaluate the effectiveness and complications of EBLMedicine
Risk factors and outcome of staphylococcus bloodstream infection in a paediatric hospitalM. El Sayed Zaki, A.A.A. El-Aziz, T. El-Said El-Banna, W.S.A. SallamAugust 2010Journal of Hospital Infection, Volume 75, Issue 4P. aeruginosa colonisation or infection resulted from cross-transmission and the other 50% were probably colonised from endogenous sources. We therefore assume that 100% of MRSA acquisition and 50% of P. aeruginosa acquisition occurred via cross-transmission. Consequently, the number of acquisitions via cross-transmission is higher for P. aeruginosa (N ¼ 60) than for MRSA (N ¼ 18). Our data therefore demonstrate that: (i) P. aeruginosa is responsible for more nosocomial infections than MRSA in French ICUs and (ii) cross-transmission of P. aeruginosa is a frequent event. The recommendations of the French Society of Hospital Hygiene then become questionable. If MRSA screening and implementation of specific barrier precautions for carriers are appropriate for preventing MRSA cross-transmission, a similar policy is likely to be effective in preventing P. aeruginosa cross-transmission. Since P. aeruginosa endemicity is higher than that of MRSA in our ICUs, implementation of barrier precautions for P. aeruginosa carriers would generate considerable additional workload. Our data may not be universal but many studies have demonstrated the importance of cross-transmission in P. aeruginosa endemicity. Multicentre studies are needed to demonstrate whether patient screening associated with carrier isolation will decrease the risk of P. aeruginosa infection in ICUs.Pharmacy
Response: Osteopontin Levels in Patients with Hepatitis C Virus-related Hepatocellular CarcinomaSahar Saad El-Din Bessa, Nadia Mohamed Elwan, Ghada Abdul Moemen Suliman, Safinaz Hamdy El-ShourbagyMay 2011Archives of Medical Research, Volume 42, Issue 4This study (1) aimed to investigate the clinical usefulness of plasma osteopontin (OPN) level as a biomarker for hepatocellular carcinoma (HCC) among high-risk patients compared to alpha-fetoprotein (AFP) and to evaluate its relationship with clinicopathological features of HCC patients. Hepatocellular carcinoma is currently the main cause of death in patients with hepatitis C virus (HCV)-related cirrhosis and the issue of HCC in Egypt is extensively increasing. Over a decade, there was nearly a 2-fold increase of the proportion of HCC among chronic liver disease patients in Egypt with a significant decline of hepatitis B virus (HBV) and a slight increase of HCV as risk factors (2). This fact justifies screening of HCV patients for early detection of HCCMedicine
The possible effect of diets containing fish oil (omega-3) on hematological, biochemical and histopathogical alterations of rabbit liver and kidneyMostafa El-Moghazy, Nahla S. Zedan, Afaf M. El-Atrsh, Mohamed El-Gogary, Ehab ToussonJuly–September 2014Biomedicine & Preventive NutritionThe dietary intake of omega-3 polyunsaturated fatty acids has emerged over the past 20 years as an important way to modify cardiovascular risk. The present study aimed to evaluate the possible effects of a partial replacement of soybean meal in control economic diet by different concentrations of fish oil on the possible harmful changes in histological structure of liver and kidney and blood parameters in rabbits.Agriculture
The effect of soil reinforcement on pullout resistance of an existing vertical anchor plate in sandM. El Sawwaf, , A. NazirApril 2006,Computers and GeotechnicsThe behavior of vertical anchor plates embedded in reinforced and non-reinforced cohesionless soil has been investigated with the help of small-scale model tests. Steel rods (model piles) with different lengths and diameters placed vertically or inclined at different locations relative to the anchor plate were used to reinforce the sand in front of both strip and square anchor plates. The considered parameters include pile length, pile diameter, pile spacing, position of pile row relative to the anchor plate and the inclination angle of the installed piles, the anchor embedment depth, the anchorage geometry and the relative density of sand. The test results indicate that this type of reinforcement significantly increases the stiffness of the soil and the pullout resistance of shallow anchor plates. Based on test results, critical values were discussed and recommended.Engineering
Post-agricultural succession in the Nile Delta regionK.H. ShaltoutSeptember 1994Journal of Arid EnvironmentsThe post-agricultural succession was evaluated in an abandoned military base in the Nile Delta region. Two species new to this region had been recorded (Ifloga spicata and Cutandia dichotomo). Their presence was related to transported building materials and/or deterioration of the soil variables towards desert soil. The heavy growth of Tamarix nilotica and Conyza dioscordis populations in the study area was related to their adaptation to significant substrate alterations, while these changes inhibit re-establishment of other long lived species. Under associated growth both populations were denser and their size distributions were biased towards small individuals. The reverse was found under non-associated growth. These findings are discussed in the light of the inhibition model and competition theoryscience
Subjective image quality comparison between two digital dental radiographic systems and conventional dental filmMuhammed Ajmal, Mohamed I. ElshinawyOctober 2014The Saudi Dental Journal, Volume 26, Issue 4, October 2014, Pages 145-150Digital radiography has become an integral part of dentistry. Digital radiography does not require film or dark rooms, reduces X-ray doses, and instantly generates images. The aim of our study was to compare the subjective image quality of two digital dental radiographic systems with conventional dental film.Dentistry
Role of transperineal ultrasound measurements in women with prolonged second stage of labor as predictors of the mode of deliveryMohamed A. Amin, Mohamed A. Eltomey, Ayman A. El-DorfDecember 2014The Egyptian Journal of Radiology and Nuclear Medicine, Volume 45, Issue 4Angle of progression measured by transperineal ultrasound, is an easy, simple, reliable, and noninvasive method for prediction of mode of delivery in women with prolonged second stage of labor rather than head progression distance.Medicine
A comparative experimental study between stiffened and unstiffened stainless steel hollow tubular stub columnsM.A. Dabaon , M.H. El-Boghdadi , M.F. Hassanein, January 2009,Thin-Walled StructuresThis paper presents a comparative experimental study between stiffened and unstiffened stainless steel hollow tubular stub columns using the austenitic stainless steel grade EN 1.4301 (304). Stainless steel structural shapes are becoming increasingly complex as cold-forming techniques are advancing. The unstiffened stainless steel tubular stub sections were fabricated by welding four angles or two channels tip-to-tip, whereas the stiffened sections were fabricated by welding four lipped angles or two lipped channels at the lips. Therefore, the stiffeners were formed at the mid-depth of the sections. In total, Engineering
The impact of timing of insemination in relation to ovulation on the cycle pregnancy rate of intrauterine insemination and intrauterine tuboperitoneal insemination in unexplained infertilitySamar Galal Younis, Rasha Abd El-Ghany Khedr, Safinaz Hamdy El-Shorbagy March 2016Journal of the Egyptian National Cancer Institute, Volume 28, Issue 1Objective: 1 – To compare the cycle pregnancy rate of intrauterine insemination (IUI) to that of intrauterine tuboperitoneal insemination (IUTPI) in unexplained infertility. 2 – To assess the effect of timing of insemination in relation to ovulation on the cycle pregnancy rate of IUI and IUTPI. Design: Prospective randomized study. Main outcome measures: 1 – Cycle pregnancy rate of IUI and IUTPI. 2 – Cycle pregnancy rate of preovulatory and postovulatory insemination. Material and methods: Two groups (A and B), each group included 160 women with unexplained primary infertility. Group A were treated by IUI and group B by IUTPI after controlled ovarian stimulation (COS) with sequential clomiphene citrate and human menopausal gonadotropin. Ovulation was by i.m. HCG. At the time of insemination the occurrence of ovulation was checked by transvaginal sonography. Medicine
Colonic mucosal expression of heat-shock proteins may have a potential prognostic value in ulcerative colitisAbdel Raouf Abou El Azm, Mohamed Yousef, Abdelrahman Kobtan, Aymen Awad, Galal Elkassas, Asem Elfert March 2015,Arab Journal of Gastroenterology, Volume 16, Issue 1The results indicated that HSP70 and HSP90 had the potential for assessment of the activity and prognosis of UC. They can also predict the presence of dysplasia and differentiate it from reactive atypia. Larger studies are needed to confirm this diagnostic and prognostic value of HSPs.Medicine
Enhancement of lipid extraction for improved biodiesel recovery from the biodiesel promising microalga Scenedesmus obliquusAbd El-Fatah Abomohraa, b, Wenbiao Jina, , , Mostafa El-Sheekhb 15 January 2016Energy Conversion and ManagementDuring the transesterification of oil feedstock for biodiesel production, the reaction primarily happens at the ester bonds where the fatty acid chains meet the glycerol. Therefore, only esterified fatty acids (EFAs) are able to be turned directly into biodiesel by transesterification. In this study, an optimized procedure for EFAs recovery from the biodiesel promising microalga Scenedesmus obliquus was studied. The effect of different solvent mixtures (ratios), extraction times, pretreatments and cell-disruption methods on intracellular EFAs and free fatty acids (FFAs) yield was examined.Engineering
Effects of chronic exposure to ammonia concentrations on brain monoamines and ATPases of Nile tilapia Mona M. Hegazi, Soha S. Hasanein4, May 2010Comparative Biochemistry and Physiologyhe effects of chronic exposure to total ammonia nitrogen (TAN) concentrations on the brain monoamines and ATPases of Nile tilapia, Oreochromis niloticus fingerlings, were
Environmental Research Volume 92, Issue 2, June 2003, Pages 110–117 Cover image Serum organochlorine levels and history of lactation in EgyptAmr S. Solimana,, Saad Eissa, Magda Morad, Khaled G. Mahgou, Ibrahim A. Seifeldin June 2003Environmental ResearchWe conducted a study in Egypt to assess the determinants of organochlorine serum levels among premenopausal women and the risk of premenopausal breast cancer for women with high organochlorine serum levels. Medicine
A hybrid network intrusion detection framework based on random forests and weighted k-meansReda M. Elbasiony, , Elsayed A. Sallam1, , Tarek E. Eltobely2, , Mahmoud M. Fahmy3, December 2013Ain Shams Engineering JournalMany current NIDSs are rule-based systems, which are very difficult in encoding rules, and cannot detect novel intrusions. Therefore, a hybrid detection framework that depends on data mining classification and clustering techniques is proposed. In misuse detection, random forests classification algorithm is used to build intrusion patterns automatically from a training dataset, and then matches network connections to these intrusion patterns to detect network intrusions. In anomaly detection, the k-means clustering algorithm is used to detect novel intrusions by clustering the network connections’ data to collect the most of intrusions together in one or more clusters. In the proposed hybrid framework, the anomaly part is improved by replacing the k-means algorithm with another one called weighted k-means algorithm, moreover, it uses a proposed method in choosing the anomalous clusters by injecting known attacks into uncertain connections data. Our approaches are evaluated over the Knowledge Discovery and Data Mining (KDD’99) datasets.Engineering
Stability achievement scalarization function for multiobjective nonlinear programming problemsMohamed Abd El-Hady Kassem6, June 2008Applied Mathematical ModellingIn this paper, we present a method to determine the stability of nondominated criterion vectors using a modified weighted achievement scalarization metric. This method is based on the application of a particular objective function which scalarizes and parameterizes the original multiobjective nonlinear programming problem. Also, we show that this modified weighted achievement metric coincides with the metric introduced by Choo and AtkinsScience
Effect of Aflatoxin B1 Aspergillic and Kojic Acid on Peanut SeedlingsM. El-Khadem,M.S. Tewfik,Y.A. Hamdi1975Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische MikrobiologieThe effect of 10, 25, 50, and 100 ppm each of aflatoxin B1, aspergillic and kojic acid on the elongation and on the dry weight of roots and stems of peanut seedlings was studied. Aspergillic acid had an inhibitory effect between 10 and 48% on the elongation and between 6 and 67% on the dry weight of seedlings.Agriculture
Interactive stability of multiobjective NLP problems with fuzzy parameters in the objective functions and constraintsElsaid Ibrahim Ammar 1 January 2000Fuzzy Sets and Systems,This paper deals with an interactive stability of multiobjective nonlinear programming problems with fuzzy parameters in the objective functions and constraints. These fuzzy parameters are characterized by fuzzy numbers.Science
Marginal adaptation of CAD/CAM zirconia-based crown during fabrication stepsR.A. El-Dessouky, M.M. Salama, M.A. Shakal, A.M. KorselJune 2015Tanta Dental Journal, Volume 12, Issue 2, June 2015, Pages 81-88Excessive marginal discrepancy of crowns favors the rate of cement dissolution and microleakage that may cause pulpal inflammation. Besides, it may increase plaque retention leading to the onset of periodontal disease. Therefore, this research was carried out to study the effect of fabrication stages and artificial aging on the marginal adaptation of CAD/CAM Zirconia-based crowns which have become increasingly popular among the patients due to their natural esthetics and excellent strength.Dentistry
Physical properties of chemically deposited CdS films for solar cellsM.H. Badawi, S. Aboul-Enein, M. Ghali, G. HassanMay–August 1998,Renewable EnergyThe technique offers the possibility for better control over the preparation processes, because of the slower rate of deposition. Effect of pH value of the solution and its temperature have been correlated. The crystalline structure of the CdS film on glass substrate was wurtzite highly oriented with small amount of cubic phase. The band gap of the film has been estimated from the optical absorption studies under different growth conditions.Science
Possible hypoglycemic effect of Aloe vera L. high molecular weight fractions on type 2 diabetic patientsAkira Yagi, Sahar Hegazy, Amal Kabbash, Engy Abd-El WahabJuly 2009Saudi Pharmaceutical Journal, Volume 17, Issue 3, July 2009, Pages 209-215Aloe vera L. high molecular weight fractions (AHM) containing less than 10 ppm of barbaloin and polysaccharide (MW: 1000 kDa) with glycoprotein, verectin (MW: 29 kDa), were prepared by patented hyper-dry system in combination of freeze–dry technique with microwave and far infrared radiation. AHM produced significant decrease in blood glucose level sustained for 6 weeks of the start of the study. Significant decrease in triglycerides was only observed 4 weeks after treatment and continued thereafter. No deterious effects on kidney and liver functions were apparent. Treatment of diabetic patients with AHM may relief vascular complications probably via activation of immunosystem.Medicine
Cytotoxic effect of elements released clinically from gold and CAD-CAM fabricated ceramic crownsW. Elshahawy, F. Shohieb, H. Yehia, W. Etman, I. Watanabe, P. KramerDecember 2014Tanta Dental Journal, Volume 11, Issue 3, December 2014, Pages 189-193The aim of this study was to investigate the cytotoxic effects of elements released from gold and CAD-CAM fabricated ceramic crowns.Dentistry
238U, 232Th content and radon exhalation rate in some Egyptian building materialsB.M. Moharrama, M.N. Sulimanb, N.F. Zahranc, S.E. Shennawya, A.R. El Sayeda, , July 2012Annals of Nuclear EnergyIn controlling natural radiation exposure for the residents of dwellings, it is necessary to determine the levels of natural radioactivity (external exposure) and radon exhalation rate (internal exposure) from building materials. In this paper uranium (238U) and thorium (232Th) content were Engineering
Human error and common-cause failure modelling of a two-unit multiple systemM.A. El-Damcese March 1997Theoretical and Applied Fracture MechanicsThis paper presents a Markov model for performing reliability and availability analysis of two unit multiplex systems with human error and common-cause failures. System availability, steady state availability, mean time to failure (MTTF) and variance of time to failure formulas are developed. Some selective plots are shown to demonstrate the effect of occurrence of common-causes failures and human errors. Science
Clinical and radiographical comparative evaluation of implant-connected versus tooth-connected implant supported partial denturesT.M. Mostafa, M.M. El-Sheikh, F.A. El-Nomany, F.E. Abd El-FattahDecember 2013Tanta Dental Journal, Volume 10, Issue 3, December 2013, Pages 145-152To compare implant connected and tooth connected implant supported fixed-detachable mandibular partial dentures clinically and radiographically.Dentistry
Evaluation of Zygomatic implant retained obturator in rehabilitation of partial palato-maxillectomy patientsA.A. Salem, E.A. Shakel, A.A. Sadakha, E.M. Kassem, A.A. El-SegaiMarch 2015Tanta Dental Journal, Volume 12, Issue 1, March 2015, Pages 35-40To evaluate clinically, radio-graphically and electro-myographically the added value after converting conventional obturator to implant retained one using Zygomatic implant for patients with acquired partial palatomaxillary defect, as regards residual tissue preservation, masticatory muscle activity and quality of the life.Dentistry
Effect of weight reduction on obese patients with COPD and bronchial asthmaBasem I. El-Shafey, Ali E. El-DeibOctober 2015Egyptian Journal of Chest Diseases and Tuberculosis, Volume 64, Issue 4Weight reduction improved airway obstruction, increased ERV, RV, FRC and DLCO either significant or insignificant in asthma and COPD.Medicine
FoxP3+ T regulatory cells and immunomodulation after Schistosoma mansoni egg antigen immunization in experimental model of inflammatory bowel diseaseEiman A. Hasby, Marwa A. Hasby Saad, Zeinab Shohieb, Kholoud El NobyMay 2015Cellular Immunology, Volume 295, Issue 1To assess the effect of Schistosoma mansoni egg antigen immunization on the immunomodulation in dextran sodium sulfate (DSS) induced colitis as an experimental model of IBD in comparison to non immunization and healthy control. The study was performed on 180 mice; 25 healthy control, 15 to identify the inflammatory peak of DSS, 25 received DSS for 7 days; 90 infected with S. mansoni cercariae to collect eggs for antigen preparation, and 25 immunized with the prepared antigen then received DSS course. Disease activity index, macroscopic & microscopic inflammatory scores, FoxP3+ T regulatory cell count, myeloperoxidase activity, and Th1/Th2 cytokine profile were compared in studied groups. Immunization induced both FoxP3+ Tregs and Th2 cytokines to establish a state of immune homeostasis and create a quiescent steadier immune response to DSS. S. mansoni egg antigen succeeded in acting like a prophylactic helminthic therapy as it has a profitable modulatory effect on DSS-induced colitis model.Medicine
Preparation and characterization of polyaniline/manganese dioxide composites and their catalytic activityAli H. Gemeay, Rehab G. El-Sharkawy, Ikhlas A. Mansour, Ahmed B. Zaki2, 15 April 2007Journal of Colloid and Interface ScienceThis paper is devoted to the preparation of polyaniline/MnO2 (PANI/MnO2) composites via chemical oxidation of aniline inscience
Mapping and evaluating land suitability using a GIS-based modelA.A. El BaroudyMay 2016CATENAWheat is considered the most important crop in Egypt; however, not all of the land in Egypt is equally suitable for growing wheat. The main objective of this study was to develop a spatial model for land suitability assessment for wheat crop integrated with geographic information system (GIS) techniques.Agriculture
Molecular cloning, functional characterization and expression of potato (Solanum tuberosum) 1-deoxy-d-xylulose 5-phosphate synthase 1 (StDXS1) in response to Phytophthora infestans Atta Soliman, Fouad DaayfFebruary 2016Plant Science1-Deoxy-d-xylulose 5-phosphate synthase (DXS) catalyzes the initial step of the plastidial 2C-methyl-d-erythritol-4-phosphate (DOXP-MEP) pathway involved in isoprenoid biosynthesis. In this study, we cloned the complete cDNA of potato DXS gene that was designated StDXS1. StDXS1 cDNA encodes for 719 amino acid residues, with MW of 77.8 kDa, and is present in one copy in the potato genome.Agriculture
Electrophoretic patterns and thin-layer chromatography of common cheeses in Egypt: Comparison and quantificationH.N. Hassan1988Food ChemistryThe extent of cheese ripening and the type of proteolysis and lipolysis of common cheeses in Egypt were measured by concentration of each of soluble tyrosine; soluble trypophan; amino NAgriculture
Thyroxine-induced cardiac hypertrophEzar Hafez, Ehab ToussonJune 2014Aging PathologyThe heart is a major target organ for thyroid hormone action and marked changes occur in cardiac function in the case of hypo- or hyperthyroidismscience
Assessment of trace elements levels in patients with Type 2 diabetes using multivariate statistical analysisM. Badran, R. Morsy, H. Soliman, T. Elnimranuary 2016Journal of Trace Elements in Medicine and Biology, Volume 33The trace elements metabolism has been reported to possess specific roles in the pathogenesis and progress of diabetes mellitus. Due to the continuous increase in the population of patients with Type 2 diabetes (T2D), this study aims to assess the levels and inter-relationships of fast blood glucose (FBG) and serum trace elements in Type 2 diabetic patients. This study was conducted on 40 Egyptian Type 2 diabetic patients and 36 healthy volunteers (Hospital of Tanta University, Tanta, Egypt). The blood serum was digested and then used to determine the levels of 24 trace elements using an inductive coupled plasma mass spectroscopy (ICP-MS). Multivariate statistical analysis depended on correlation coefficient, cluster analysis (CA) and principal component analysis (PCA), were used to analysis the data. The results exhibited significant changes in FBG and eight of trace elements, Zn, Cu, Se, Fe, Mn, Cr, Mg, and As, levels in the blood serum of Type 2 diabetic patients relative to those of healthy controls. The statistical analyses using multivariate statistical techniques were obvious in the reduction of the experimental variables, and grouping the trace elements in patients into three clusters. The application of PCA revealed a distinct difference in associations of trace elements and their clustering patterns in control and patients group in particular for Mg, Fe, Cu, and Zn that appeared to be the most crucial factors which related with Type 2 diabetes. Therefore, on the basis of this study, the contributors of trace elements content in Type 2 diabetic patients can be determine and specify with correlation relationship and multivariate statistical analysis, which confirm that the alteration of some essential trace metals may play a role in the development of diabetes mellitus.Medicine
Effect of N-methylation on both ground and excited states propertiesSafaa El-Din H. Etaiw, Mohamed K. Awad, Tarek A. Fayed, Morad M. El-Hendawy17 February 2009Journal of Molecular Structuretructures of the investigated compounds in ground and excited states as well as their electronic transitions. The direction of the intramolecular charge transfer was explored via the charge distribution on the individual molecular subunits in both ground and excited states,science
Immediate and late management of iatrogenic ureteric injuries: 28 years of experienceAhmed S. El Abd, Shawky A. El-Abd, Mohamed Abo El-Enen, Ahmed M. Tawfik, Mohamed G. Soliman, Mohamed Abo-Farha, Abd-El Naser El Gamasy, Mahmoud El-Sharaby, Samir El-GamalDecember 2015Arab Journal of Urology, Volume 13, Issue 4Objective To evaluate the long-term results after managing intraoperative and late-diagnosed cases of iatrogenic ureteric injury (IUI), treated endoscopically or by open surgery. Patients and methods Patients immediately diagnosed with IUI were managed under the same anaesthetic, while those referred late had a radiological assessment of the site of injury, and endoscopic management. Open surgical procedures were used only for the failed cases with previous diversion. Results In all, 98 patients who were followed had IUI after gynaecological, abdominopelvic and ureteroscopic procedures in 60.2%, 14.3% and 25.5%, respectively. The 27 patients diagnosed during surgery were managed immediately, while in the late-referred 71 patients ureteroscopic ureteric realignment with stenting was successful in 26 (36.6%). Complex open reconstruction with re-implantation or ureteric substitution, using bladder-tube or intestinal-loop procedures, was used in 27 (60%), 16 (35.5%) and two (4.5%) patients of the late group, respectively. A long-term radiological follow-up with a mean (range) of 46.6 (24.5–144) months showed recurrent obstruction in 16 (16.3%) patients managed endoscopically and reflux in six (8.3%) patients. Three renal units only (3%) were lost in the late-presenting patients. Conclusion Patients managed immediately had better long-term results. More than a third of the late-diagnosed patients were successfully managed endoscopically with minimal morbidity. Open reconstruction by an experienced urologist who can perform a complex substitutional procedure was mandatory to preserve renal units in the long-term.Medicine
Catalytic activity of silica gel surface modified by transition metal-aminosilane complexes in the decomposition of hydrogen peroxideAli.H. Gemeay, 30 September 1996Colloids and Surfaces A: Physicochemical and Engineering Aspectsorder kinetics with respect to the amount of catalyst are confirmed. The silica gel surface modified by adsorbed metal ion complexes exhibited higher activity compared to the corresponding silica gel surface modified by bonded complexesscience
Electrophysiological and psychological studies in tinnitusTakwa A. Gabr, Mohammed Abd El-Hay, Adel BadawyDecember 2011Auris Nasus Larynx, Volume 38, Issue 6Patients with tinnitus showed abnormalities at both electrophysiological and psychological levels when compared with normal subjects. Conclusion This study provides evidences that different pathological mechanisms are involved in tinnitus generation which are more extensive than we thought.Medicine
Pyocyanin as anti-tyrosinase and anti tinea corporis: A novel treatment studyNessma A. El-Zawawya, , , Sameh S. Alia, bNovember 2016Microbial PathogenesisThe aim of this study was to evaluate the efficiency of pyocyanin pigment as a novel compound active against tyrosinase with its depigmentation efficiency for combating Trichophyton rubrum which could be a major causative agent of tinea corporis.Engineering
Effects of rotary instrumentation and different etchants on removal of smear layer on human dentinMohamed F. AyadJanuary 2001The Journal of Prosthetic Dentistry, Volume 85, Issue 1, January 2001, Pages 67-72Statement of problem. Various methods of rotary preparation and conditioning of teeth affect surface topography and may affect the retention of dental restorations.Dentistry
Effect of ultraviolet irradiation on germination and growth in Aspergillus flavus and Penicillium notatumMohamed Osman, M.A. Elsayed, Y.A.H. Mohamed, A.M. Abo-ZeidApril 1989Mycological ResearchLinear growth was also affected by uv-A especially if irradiation was applied for long periods. Retardation in linear growth was most pronounced during the first 3 d incubation. Uv-B irradiation markedly affected growth and a delay of 72 h in growth could be observed in some treatments. Uv-B irradiation for 4 h completely inhibited growth of P. notatum, while the same treatment retarded growth to some extent in A. flavus.Science
Platelet rich plasma may enhance peripheral nerve regeneration after cyanoacrylate reanastomosis: a controlled blind study on ratsR.F. Elgazzar, M.A. Mutabagani, S.E. Abdelaal, A.A. SadakahAugust 2008International Journal of Oral and Maxillofacial Surgery, Volume 37, Issue 8, August 2008, Pages 748-755The aim of this study was to explore the ability of platelet rich plasma (PRP) to promote peripheral nerve regeneration after cyanoacrylate reanastomosis in rats. A total of 18 rats were used in this study. Bilateral sciatic neurotomies were performed in 15 rats, and then immediately reanastomosed with cyanoacrylate glue. On one side (G1), the anastomosed nerves were treated with prepared autologous PRP gel; on the contralateral side (G2) the nerves received no additional treatment. Sham surgery was undertaken on the remaining 3 rats (6 cases) where bilateral sciatic nerves were surgically approached but not cut (passive control group, (G3). Biopsies were harvested 12 weeks postoperatively and examined under the light microscope using osmic acid stain. The number of nerve fibers in the distal and proximal nerve segments of G1 and G2 as well as in G3 were counted and the results analyzed and compared.Dentistry
The ac electrical conductivity for Co-substituted SbNi ferritesM.A. Ahmed, M.A. El Hiti, M.K. El Nimr, M.A. Amer2 January 1996,Journal of Magnetism and Magnetic Materialsurie temperatures decrease with increasing Co ion content. The activation energy for electrical conduction in the ferrimagnetic region decreases as frequency increases. In the power law for ac electrical conductivityScience
Synthesis and application of organophilic polystyrene-montmorillonite supported onium salts in organic A. Akelah, A. Rehab, A. Selim, T. Agag5 December 1994Journal of Molecular CatalysisCopolymers of styrene and chloromethylstyrene containing 2% ammonium salt groups have been grafted onto montmorillonite interlayers by cation exchange process. The remaining chloromethyl groups were modified to produce phosphonium salts. The catalytic activities of the phosphonium moieties supported on polystyrene-montmorillonite have been investigated in thiocyanate and nitrite nucleophilic reactions. The effectiveness of these catalysts has been examined under the effects of several factors governing the reactions rates such as the chemical composition of polymers backbone, chemical nature of the active moiety, degree of loading, nature of the solvent, and reaction
Long interfacial waves on the upper convected MaxwellAhmed Assaf, Magdy A. Sirwah, Kadry ZakariaMarch 2013,International Journal of Non-Linear MechanicsThe problem of hydrodynamic instability of a very thin UCM liquid film flowing down on the outer surface of an inclined plane is investigated. In order to improve the accuracy of numerical results, the viscoelastic parameters and van der Waals forces have been included into the governing equations. Also, the analytical solutions are obtained by utilizing the long-wave perturbation method. The influence of some physical parameters is discussed in both linear and non-linear steps of the problem. It has been revealed that the instability of the film flow is weakened when Reynolds number, viscoelastic property and attractive van der Waals force are reduced. Further, the thin film flow can be stabilized by short-range Born repulsion. The results show that both supercritical stability and subcritical instability may take place within the film flow system. Moreover, the presence of non-linear terms leads to an obvious difference in the behavior of some physical parametersscience
Histochemical analysis of glycoproteins of the gastric mucosal cells of Japanese monkeys under fasting stressM.H. FayedDecember 1996PathophysiologyIn the gastric mucosa of Japanese monkey under fasting stress conditions, the complex carbohydrates were analyzed by a series of histochemical staining (Tables 1 and 2) to clarify the reactions of different glycoproteins (GPs) classes to fasting stress. Agriculture
Fluid inclusions in the mesozonal gold deposit at Atud mine, Eastern Desert, EgyptHassan Z HarrazOctober 2002Journal of African Earth Sciences,Gold mineralization at the Atud mine occurs as fracture-filling auriferous quartz veins hosted in Neoproterozoic dioritic rocks and along their contact with metagabbro. Gold mineralization is associated with metasomatic alteration zones around shear zones and quartz–carbonate vein arrays. The mineralized veins consist of quartz, carbonate and albite gangue enclosing minor amounts of pyrrhotite, arsenopyrite, pyrite and
External exposure doses due to gamma emitting natural radionuclides in some Egyptian building materialsB.M. Moharrama, M.N. Sulimanb, N.F. Zahranc, S.E. Shennawya, A.R. El Sayeda,January 2012Applied Radiation and IsotopesUsing of building materials containing naturally occurring radionuclides as 238U, 232Th and 40K and their progeny results in an external exposures of the housing of such buildings. In the present study, indoor dose rates for typical Egyptian rooms are calculated using the analytical method and activity concentrations of natural radionuclides in some building materials. Uniform chemical composition of the walls, floor and ceiling as well as uniform mass concentrations of the radionuclides in walls, floor and ceiling assumed.Engineering
Nanoindentation creep versus bulk compressive creep of dental resin-compositesS. El-Safty, N. Silikas, R. Akhtar, D.C. WattsNovember 2012Dental Materials, Volume 28, Issue 11, November 2012, Pages 1171-1182To evaluate nanoindentation as an experimental tool for characterizing the viscoelastic time-dependent creep of resin-composites and to compare the resulting parameters with those obtained by bulk compressive creep.Dentistry
P3.52. Coordinated expression of iNOS–VEGF/VEGF-receptors in epithelial white lesions provoked by Qat chewing: Immunohistochemical studyA.A. Ali, W.M. SwelamJuly 2009Oral Oncology Supplement Chewing leaves of the Qat (Foreskal Selastrasia) followed by storing them in the oral vestibule (either right or left vestibule), is habitual custom for most of Yemeni people.Medicine
Magnetic resonance imaging for diagnosis of pelvic lesions associated with female infertilityManal Ezzat Badawy, Dina Gamal Eldeen Elkholi, Mohamed Fouad Sherif, Mohamed Abd Elgeleel HefedahSeptember 2015Middle East Fertility Society Journal, Volume 20, Issue 3, The following pelvic lesions associated with female infertility were not conclusively diagnosed by HSG or/ and US but were precisely diagnosed by MR imaging with 100% accuracy: Pyosalpinx, hydrosalpinx and hematosalpinx, ovarian and deep infiltrating endometriosis and benign and malignant ovarian tumors as benign cystic teratoma and serous cystadenocarcinoma.Medicine
Macroscopic and microscopic parameters of laser dye solventsHassan El-Kashef September–October 1998Optics & Laser Technologyor the laser designer and other users the optical, electrical and refractive parameters have been obtained for pure nonpolar laser dye solvents m-xylene and dioxane. The refractive index (n) and its thermo-optic constant (dn/dT) at argon laser wavelength 514.5 nm and He–Ne laser wavelength 632.8 nm, are measuredscience
Phytohormone profiling of the sweet orange (Citrus sinensis (L.) Osbeck) leaves and roots using GC–MS-based methodYasser Nehelaa, Faraj Hijaza, Abdelnaser, Elzaawely, Hassan M. El-Zahaby, Nabil Killiny 20 July 2016Journal of Plant PhysiologyPhytohormones mainly affect plant development and trigger varied responses to biotic and abiotic stresses. The sensitivity of methods used to profile phytohormones is a vital factor that affects the results. We used an improved GC–MS-based method in the selective ion-monitoring (SIM) mode to study the phytohormone profiling in citrus tissues. One extraction solvent mixture and two derivatization reagents were used, methyl chloroformate (MCF) and N-Methyl-N-(trimethylsilyl) trifluoroacetamide (MSTFA). Agriculture
Apoptotic and anti-apoptotic seromarkers for assessment of disease severity of non-alcoholic steatohepatitisHanan El Bassat, Dina H. Ziada, Eiman A. Hasby, Hala Nagy, Mohammad H. Abo RyiaMarch 2014Arab Journal of Gastroenterology, Volume 15, Issue 1This study aimed to find out non-invasive markers for the assessment of severity of non-alcoholic steatohepatitis (NASH) in an attempt to decrease the need for liver biopsy. It also aimed to evaluate the key role of apoptosis in the pathogenesis of the disease and the suggested role of anti-apoptotic factors in therapeutic modalities and disease prognosis. Patients and methods The serum levels of soluble Fas (s. Fas), s. Fas ligand, cytokeratin 18 (CK-18) fragment and Bcl-2 were measured in 80 patients and 15 non-hepatic subjects as control. The patients were divided based on histological examination of liver biopsy into three groups. Group I included 40 patients with NASH, group II had 40 patients with non-alcoholic fatty liver disease (NAFLD) non-NASH and group III had 15 non-hepatic subjects as control. Apoptosis of hepatocytes was assessed by morphological examination using a light microscope and expressed as number per square millimetre. Results There was a significant increase in the serum levels of s. Fas, s. Fas ligand and CK-18 fragments in the NASH group. The anti-apoptotic protein Bcl-2 showed significantly low levels in NASH patients. Apoptosis of hepatocytes was significantly higher in the NASH group. The degree of apoptosis was inversely correlated with the level of Bcl-2. A significant correlation between both s. Fas and CK-18 fragment with liver histology with regard to lobular inflammation and ballooning was found. Conclusions Increased serum levels of s. Fas and CK-18 fragment in the NASH group and its correlation with the severity of disease suggested the key role of apoptosis in NASH pathogenesis which can be used for the assessment of the severity of NASH. A high level of anti-apoptotic Bcl-2 in NAFLD suggests its protective role in disease progress.Medicine
Potential predictors for successful misoprostol treatment for early pregnancy failure: Clinical and color Doppler imaging studyDina Gamal Eldeen ELkholi, Mohamed Mohamed HefedaSeptember 2015Middle East Fertility Society Journal, Volume 20, Issue 3,The potential predictors for successful misoprostol treatment for early pregnancy failure may be one or more of the following: 1. Active vaginal bleeding and/or localized abdominal colic in the 24 h preceding misoprostol administration. 2. Nulliparity or low parity not more than 1. 3. Blood flow in the presumed IVS of missed miscarriage or anembryonic pregnancy and absence of blood flow (vascularity) in trophoblastic tissue of incomplete miscarriage.Medicine
Therapeutic battle against larval toxocariasis: Are we still far behind?Ahmad A. Othman December 2012Acta Tropica, Volume 124, Issue 3Toxocariasis is a widespread zoonotic helminthic disease. Human infection is acquired by ingestion of embryonated eggs of Toxocara which reach the environment via stools of dogs and cats. In paratenic hosts, such as humans and mice, the hatched larvae migrate systematically in the body and could reach critical sites such as the eye and the central nervous system. The clinical expression of toxocariasis includes two main forms of varying intensity: visceral and ocular, as well as several organ-specific clinical manifestations. The issue of treatment is a matter of great controversy not only because of limited efficacy of anthelmintic drugs in terms of parasite eradication, but also because of doubts about the benefits of therapy as most Toxocara infections are self-limiting. Many animal studies were conducted employing different drugs and regimens, yet the results were variable and inconsistent. On the other hand, experience in human therapy is unfortunately limited due to paucity of clinical trials. Herein, the problems and pitfalls of treatment of toxocariasis are addressed, and new trends in therapy are discussed.Medicine
Efficacy of microtensile versus microshear bond testing for evaluation of bond strength of dental adhesive systems to enamelAhmed A. El Zohairy, Mohamed H. Saber, Ali I. Abdalla, Albert J. FeilzerSeptember 2010Dental Materials, Volume 26, Issue 9, September 2010, Pages 848-854The aim of the study was to evaluate the efficacy of the microtensile bond testDentistry
Seasonal trends in nitrogen and carbohydrate contents of ‘Banati’ pomegranate leavesMohamed Ali A. BachaSeptember 1975Scientia Horticulturaehe seasonal trends in nitrogen and carbohydrate contents in the leaves of ‘Banati’ pomegranate trees were studied during two successive growing-seasons. The nitrogen content expressed as % and as mg per leaf decreased gradually during the growing-season in both years. Agriculture
Photochemistry of10-perylenetetracarboxylic diimide in chloromethane solventsSamy A. El-Daly, Tarek A. Fayed October 2000Journal of Photochemistry and Photobiology aaaaaaaaaaaaascience
Effects of fungicides and biofungicides on population density and community structure of soil oribatid mitesAbdel-Naieem I.M. Al-Assiuty, Mohamed A. Khalil, Abdel-Wahab A. Ismail, , Mohamed F. Ageba1 January 2014Science of The Total EnvironmentTo compare the side-effects of chemical versus biofungicides on non-target organisms in agricultural soil, a study of population structure, spatial distribution and fecundity of oribatid mites, a diverse and species-rich group of microarthropods indicative of decomposer activity in soil was done. Plots laid out in agricultural fields of a research station in Egypt, were cultivated with cucumber and treated with two chemical fungicidesAgriculture
Age estimation in adult human sound and periodontally affected teeth using tooth cementum annulationsW.Y. Alghonamy, O.M. Gaballah, D.A. LabahDecember 2015Tanta Dental Journal, Volume 12, Issue 4, December 2015, Pages 277-285There are many tools for identification of human remains, via radio graphical imaging, histological processing & microscopical examination of dental remains.Dentistry
Using acrylamide and oligo (oxyethylene) methacrylate in corrosion protection of steelM.A. Elmorsi1 February 1998, PagesCorrosion ScienceThis study examines the use of radical polymerization in a solution of acrylamide (AA) and oligo(oxyethylene) methacrylate (OEGMA) for corrosion and dissolution protection of steel in aerated aqueous solutions. The inhibiting efficiency of the different additives is evaluated from anodic and cathodic polarization curves as well as from polarization resistance. The corrosion protection is determined under varied medium composition and surface pretreatment conditions. The temperature effect is also studied and the thermodynamic activation parameters of the corrosion reaction are obtained. It was found that the examined compounds can afford good protection, even to an already oxidized steel surface, particularly in highly acidic solutions. At moderately elevated temperature, OEGMA provides higher inhibition efficiency compared to AA and the corrosion reaction was found to be entropy
Survivin immunohistochemical expression in hepatocellular carcinoma: Correlation with tumour differentiation and proliferationEiman Adel Hasby, Mohammed Alaa MokhtarSeptember 2010Arab Journal of Gastroenterology, Volume 11, Issue 3Recently, survivin was shown to inhibit apoptosis and accelerate cancer cell proliferation as well. The expression of survivin may be of prognostic significance and therapeutic relevance in many cancers. This study investigated the expression of survivin in hepatocellular carcinoma (HCC); correlated results with tumour differentiation and proliferationMedicine
Polymethylmethacrylate–montmorillonite composites: preparation, characterization and propertiesNehal Salahuddin, Mohamed ShehataSeptember 2001Polymer, Volume 42, Issue 20, September 2001, Pages 8379-8385The objective of this work was directed to solve a problem of polymerization shrinkage in acrylic resin polymethylmethacrylate (PMMA) material. Organophilic montmorillonite (claytone) was added up to 1% by weight to one commercial type of PMMA powder to form PMMA–MMT composite. Acrylic specimens were processed by the conventional heat curing method following manufacturer's instructions.Medicine
Tthe ac electrical conductivity for Co-substituted SbNi ferrites 2 January 1996 2 January 1996Journal of Magnetism and Magnetic Materials, Curie temperatures decrease with increasing Co ion content. The activation energy for electrical conduction in the ferrimagnetic region decreases as frequency increases.Science
Sulfation of naringenin by Cunninghamella elegansAbdel-Rahim S. IbrahimJanuary 2000Phytochemistry, Volume 53, Issue 2A new flavonoid sulfate, naringenin-7-sulfate, was obtained by fermentation of naringenin using the fungus Cunninghamella elegans NRRL 1392 in 23% yield. Structural elucidation of the metabolite was achieved using EIMS, UV, IR, 1D and 2D NMR spectroscopy beside acid and enzyme hydrolyses.Pharmacy
Surface roughness of dentin after tooth preparation with different rotary instrumentationMohammed F Ayad, Stephen F Rosenstiel, Moustafa M HassanFebruary 1996The Journal of Prosthetic Dentistry, Volume 75, Issue 2, February 1996, Pages 122-128Although surface finish can be a critical variable in clinical performance, there is a dearth of information regarding surface characteristics of teeth prepared for artificial crowns. This study characterized teeth prepared for complete cast restorations using three representative types of rotary instruments.Dentistry
1H and 13C-NMR studies of the interaction between 1,3,5-trinitrobenzene and 2,6-dimethylnaphthaleneM.M. Ayad. Author links open the author workspace.Opens the author workspacea. Numbers and letters correspond to the affiliation list. Click to expose these in author workspaceR.M. Issa. Author links open the author workspace.a. Numbers and letters correspond to the affiliation list. Click to expose these in author workspaceJ. Homer. Author links open the author workspace.b1989Spectrochimica Acta Part A: Molecular SpectroscopyThe interaction of 1,3,5-trinitrobenzene with 2,6-dimethylnaphthalene in carbon tetrachloride has been studied by 1H and 13C-NMR spectroscopy. In the case of the 1H-NMR measurements, the dispersed water phase (DP) and the internal cyclohexane reference methods were used. This revealed that unwanted non-bonding screening effects on the internal reference are very small over the experimental concentration range used, and that cyclohexane is, therefore, a reliable reference. The values of the equilibrium quotient for the interaction obtained using both references are compatible with the equilibrium quotient obtained from the 13C data.Engineering
Preoperative sonographic and Doppler parameters predictors of semen analysis improvement after unilateral varicocelectomyMahmoud Abd El-Azez Dawoud, Khaled Abd El-Wahab Abo-Dewan, Mohamed Mohamed HefedaJune 2014The Egyptian Journal of Radiology and Nuclear Medicine, Volume 45, Issue 2The best preoperative sonographic parameters of success of unilateral varicocele repair are the presence of normal sized testes, high grade reflux, and to lesser degree large vein diameter.Medicine
Suggested procedure for preventive maintenance policyM.A. El-DamceseAugust 1997Microelectronics Reliabilityhis paper presents some methodological contributions for discussing the problem of optimizing preventive maintenance (PM) schedules. A suggested procedure for the problem is presented. The main features of this procedure are: (i) a system is made up of components. Each component and the system can be in only one of two states: failures or success, and the states are statistically independent; (ii) the importance of constituent components that will receive the maintenance action; and (iii) a hazard function is developed in this paper consistent with the concept of PM effect; cost optimization of the PM intervention interval is obtained by determining the average cost rate of the system operation. A case study is taken to apply the suggested
Iron alone or iron and erythropoietin added to acute normovolemic hemodilution in myomectomy patients: A randomized controlled trialAbd El Raheem Mostafa Dowidar, Hoda Alsaid Ahmed Ezz, Ayman Abd El Aziz El Dorf, Mai Mokhtar KasemJanuary 2016Egyptian Journal of Anaesthesia, Volume 32, Issue 1Preoperative iron alone or iron and erythropoietin added to acute normovolemic hemodilution help to reduce the need for allogenic blood transfusion in myomectomy patients. Further studies are needed to evaluate their use in older patients with higher risk for thrombosis and hypertension.Medicine
A study on the role of rivaroxaban in management of venous thromboembolismMohmed Abdalwahab, Yousef Mansour, Ayman El-DibOctober 2015Egyptian Journal of Chest Diseases and Tuberculosis, Volume 64, Issue 4Rivaroxaban is a rapid onset of anticoagulant that can be given in fixed doses without routine monitoring. It can replace injectable anticoagulants as an initial treatment in management of patients with mild venous thromboembolism as it is suitable as regard the economic and the health status of the Egyptian patients.Medicine
Crustal structure beneath Kottamiya broadband station, northern Egypt, from analysis of teleseismic receiver Mohamed K. Salah5, July 2011Journal of African Earth SciencesWe analyzed a total of 206 receiver functions beneath Kottamiya broadband station in northern Egypt to study the crustal structure and any azimuthal variations in the crustal thickness. The computed receiver functions are subdivided according to their azimuth into eight subgroups and analyzed separately using a genetic algorithm. The genetic algorithm is more appropriate than conventional linearized inversion schemes in regions where there is little a priori information about local crustal structures such as northern Egypt because it does not strongly depend on an initial model. The study region is located on the unstable shelf of Egypt in the northeastern corner of Africa. Little information about the deep structure of the crust beneath this region is available. For this reason, we have adopted the genetic algorithm to seismic waveform data recorded by Kottamiya broadband station. The crustal thickness varies slightly from 32 to 34 km with an average of 32.25 km, which is consistent with previous studies in the region. The crustal thickness shows a tendency of decrease toward the east and northeast being consistent with the general tectonic setting of the region including the opening of the Red Sea in the Tertiary times. Nonetheless, more teleseismic receiver functions from earthquakes recorded at denser seismic stations in northern Egypt and the southeastern Mediterranean combined with surface wave dispersion data as well as other geophysical investigations are necessary for more detailed imaging of the crustal structure which will deepen our understanding of the current tectonic and seismic activities of the region.Science
Investigation of the electrical properties of some dental composite restorative materials before and after laser exposureM.A. ElKestawy, S.A. Saafan, M.M. Shehata, A.M. SaafanOctober 2006Dental Materials, Volume 22, Issue 10, October 2006, Pages 885-895Some electrical properties, such as piezoelectricity, ac conductivity, dielectric constant and loss tangent of nine commercial types of dental composite restorative materials, have been investigated before and after laser exposure for 3 s to study the effect of a probable laser exposure during some surgeries on the electrical properties of these materials. No piezoelectric effect has been found in these materials before and after laser exposure. The materials were found to be good insulators (very poorly conducting materials). The temperature and frequency dependence of ac conductivity, dielectric constant and loss tangent have not shown significant changes in values after laser exposure.Dentistry
Claudin 4 expression in triple-negative breast cancer: correlation with androgen receptors and Ki-67 expressionMona A. Abd-Elazeem, Marwa A. Abd-ElazeemFebruary 2015Annals of Diagnostic Pathology, Volume 19Breast cancer is the most common malignancy in women and the leading cause of cancer mortality worldwide. Triple-negative breast cancer (TNBC) is an important phenotype of breast cancer that accounts for a relatively small number of breast cancer cases but still represent a focus of increasing interest at the clinical, biological, and epidemiological level. Claudins are the major component of the tight junction, and only a few studies have addressed the role of claudins in breast cancer, especially TNBC. Androgen receptors (ARs), as members of the nuclear receptor superfamily, are known to be involved in a complex network of signaling pathways that collectively regulate cell proliferation. However, roles of AR in breast cancer development and progression have not been very clearly understood. Medicine
Synthesis, spectroscopic, cytotoxic aspects and computational studyDina M. Abd El-Aziz, Safaa Eldin H. Etaiw, Elham A. Ali24 September 2013Journal of Molecular Structurespectra and magnetic moment data. The thermal degradation behavior of the Schiff base and its complexes was investigated by thermogravimetric analysis. The structure of the Schiff base and its transition metal complexes was also theoretically studied using molecular mechanicsscience
Marginal accuracy in casting titanium fixed partial denturesW. ElshahawyJune 2015Tanta Dental Journal, Volume 12, Issue 2, June 2015, Pages 119-123This study evaluated marginal accuracy of cast titanium using three-unit fixed partial denture (FPD).Medicine
Image processing technique to assess the use of sugarcane pith to mitigate clayey soil cracks: Laboratory experimentA.A. Abd El-HalimJune 2017Soil and Tillage ResearchRapid transport of water and solutes through desiccation soil cracks can lead to crop water and nutrient stress. The challenge of irrigation management of cracking soils is to take advantage of the rapid water intake rate of a dry, cracked soil,Agriculture
Nutritive value of twoTamarixspecies in EgyptM.A.H. El-Beheiry, H.F. El-Kady 4, April 1998Journal of Arid EnvironmentsShoots ofTamarix niloticaandT. aphyllawere collected from north Sinai, the Nile Delta and North Western Desert of Egypt and analysed forin vitrototal digestible nutrients, nutritive value, gross energy and element contents. Pronounced differences were recorded between the two species for all the estimated variables. Variation in gross energy in the tissues of both species in relation to different locations was insignificant. The two evaluated species have relatively low contents of N, K, Ca and crude protein and high contents of P, Mg and Na. There was a moderate positive correlation betweenScience
Prophylactic use of indomethacin for prevention of postsurgical complications after removal of impacted third molarsMohamed M. Amin, Daniel M. LaskinMay 1983Oral Surgery, Oral Medicine, Oral Pathology, Volume 55, Issue 5, May 1983, Pages 448-451The effect of indomethacin on the prevention of pain, swelling, and trismus following removal of impacted third molars was studied. Swelling was significantly less than in control subjects taking acetaminophen and codeine, and pain was equally reduced. Trismus was the same in both groups.Dentistry
Extraction of electrode kinetics and transport parameters of ferrocene at a platinum electrode from semiintegral electroanalysisY.I. Moharram1 February 2006,Journal of Electroanalytical ChemistrySemiintegral electroanalysis for the measurement of the kinetic parameters in case of quasi-reversible electron transfer process was presented. As an experimental example using the electrooxidation of ferrocene at a platinum electrode in acetonitrile was Science
Role of percutaneous ultrasonographic guided radiofrequency ablation in the management of hepatocellular carcinomaMohamed Ahmed Youssef, Faten Mohamed Salem, Khaled Abdelwahab Abudewan, Enas Mohamed Korayam, Hazem Metwally Mohamed OmarJune 2014The Egyptian Journal of Radiology and Nuclear Medicine, Volume 45, Issue 2, Radiofrequency thermal ablation is a simple, effective and less expensive technique with a low morbidity compared with surgical treatment. Radiofrequency thermal ablation can produce significant long-term survival rates and excellent local control for cirrhotic patients with early stage, unresectable HCC.Medicine
Photophysical properties and laser activity Samy A El-Daly, Tarek A Fayed November 1999 Molecular and Biomolecular Spectroscopyuorescence and photoisomerization quantum yields have been determined in different organic solvents. The photoisomerization quantum yield is very small compared to the fluorescence yield, and both are sensitive to solvent polarity. B4QVB undergoes solubilization in both cationic and anionic micellar mediascience
Processing of polymer nanofibers through electrospinning as drug delivery systemsEl-Refaie Kenawya, , , Fouad I. Abdel-Haya, Mohamed H. El-Newehya, Gary E. Wnekb15 January 2009Materials Chemistry and PhysicsThe use of electrospun fibers as drug carriers could be promising in the future for biomedical applications, especially postoperative local chemotherapy. In this research work, electrospun fibers were developed as a new system for the delivery of ketoprofen as non-steroidal anti-inflammatory drug (NSAID). The fibers were made either from polycaprolactone (PCL) as a biodegradable polymer or polyurethane (PU) as a non-biodegradable polymer, or from the blends of the two. The release of the ketoprofen was followed by UV–vis spectroscopy in phosphate buffer of pH 7.4 at 37 and 20 °C. The results showed that the release rates from the polycaprolactone, polyurethane and their blend are similar. However, the blend of the polycaprolactone with polyurethane improved its visual mechanical properties. Release profiles from the electrospun mats were compared to cast films of the various formulations.Engineering
Raman spectra, microstructure and superconducting properties of Sb(III)–YBCO composite superconductorKhaled M. Elsabawy15 November 2005, Physica C: Superconductivityformula; Y1+xSbxBa2Cu3Oz, where x = 0.1, 0.2, 0.4 and 0.6 mol%, respectively, were preparedscience
A pilot study of lactic acid as an enamel and dentin conditioner for dentin-bonding agent developmentMohammed F Ayad, Stephen F Rosenstiel, Ali M FaragSeptember 1996The Journal of Prosthetic Dentistry, Volume 76, Issue 3, September 1996, Pages 254-259The purpose of this pilot study was to determine how lactic acid solution at various concentrations and etching times affected prepared human enamel and dentin surfaces and to assess whether it could be used in place of phosphoric or maleic acid as an etchant. The occlusal surfaces of extracted molar teeth were ground wet with 600-grit silicon carbide paper and treated with various aqueous solutions of lactic acid. Random samples were prepared for observation by scanning electron microscopy. The rest were used to determine shear bond strength of bonded dental composite cylinders. The micrographs revealed that lactic acid dissolved the smear layer with various degrees of etching and demineralization. The degree of smear layer and matrix removal was proportional to the concentration of the acid and the length of application time. A 20% lactic acid concentration applied for 10 seconds produced a clearly etched surface with minimal demineralization. A 30% concentration not only removed the smear layer and enlarged the dentin tubule orifices but also appeared to affect the collagen matrix. The shear bond strength to enamel treated with 50% lactic acid (17.5 ± 1.5 MPa) and All-Bond 2 etchant (18.9 ± 1.3 MPa) were not significantly different (p > 0.05). However, mean dentin bond strengths for all groups of lactic acid etchant and All-Etch etchant (10% phosphoric acid) were statistically similar.Dentistry
Influence of fiber type and wetting agent on the flexural properties of an indirect fiber reinforced compositeAyman E. Ellakwa, Adrian C. Shortall, Peter M. MarquisNovember 2002The Journal of Prosthetic Dentistry, Volume 88, Issue 5, November 2002, Pages 485-490Statement of Problem. Different fiber types are available for reinforcing composite restorations. Little information exists regarding optimal fiber type/bonding agent combinations. Purpose. This in vitro study examined the influence of storage time and 2 fiber wetting agents on the flexural properties of an indirect dental composite reinforced by 3 fiber types. Material and Methods. Three types of fiber (ultra-high molecular weight polyethylene, Kevlar, and Glass fiber) were used to reinforce samples of an indirect composite (Artglass) prepared to test flexural properties. Each fiber type was used to prepare 3 groups of 10 specimens after fiber wetting with an unfilled or a filled resin bonding agent.Medicine
GC/MS of methylated phenoxyalkanoic acid herbicidesM.A. Khalifa 29 April Science of The Total EnvironmentPhenoxyalkanoic acid herbicides have been detected as their methyl esters using the GC/Ion Trap combination after extraction and preconcentration from surface water and derivatisation with diazomethane. Agriculture
P01-204-Predictors of recurrence of bipolar disorder during pregnancy and postpartum period in a sample of egyptian womenM.A. Abd El-Hay, H.F. El Sawy, A.A. Badawy2011European Psychiatry, Volume 26, Supplement 1 Multiple factors were associated with risk of recurrence of bipolar I disorder during pregnancy and postpartum, which should be while planning treatment for such women.Medicine
Experimental investigation of corrugated absorber solar still with wick and reflectorsZ.M. Omaraa, A.E. Kabeelb, , , , A.S. Abdullahc, 1, F.A. EssaaMarch 2016DesalinationThe performance parameters of the corrugated solar still (CrSS) and conventional solar still (CSS) are investigated experimentally from another point of view. The authors' view concerns with using the double layer wick material and also reflectors together inside the CrSS. In addition, the influence of saline water depth (1, 2, and 3 cm) on CrSS performance was also investigated. Results indicated an enhancement in the total productivity and efficiency of the CrSS. During experimentations, the productivities of CrSS with wick and reflectors are about 145.5% higher than the CSS, at a brine depth of 1 cm, and the daily efficiency of CrSS and CSS are approximately 59% and 33%, respectively.Engineering
Genetic polymorphism of glutathione S-transferases M1 and T1 in Egyptian patients with bilharzial bladder cancerAmal H. Abd El Hameed, Osama E. Negm, Osama M. El-Gamal, Hala E. Hamouda, Kholoud A. El Nouby, Ghada M. IsmailMay–June 2010,Urologic Oncology: Seminars and Original Investigations, Volume 28, Issue 3Patients with urinary bilharziasis and GSTM1 ve and T1 ve genes might be at increased risk of bladder cancer. However, larger studies are needed for confirmation of these results.Medicine
Preparation and synthetic application of poly(4-vinylpyridine) based resins with bound nucleophilic reagentsM. Hassanein9, September 1992European Polymer JournalInsoluble polymer-bound nucleophilic reagents were prepared by modification of crosslinked poly(4-vinylpyridine)Science
Structural performance of RC slabs provided by pre-cast ECC strips in tension cover zoneHamdy Mohy El-Din Afefy, 1, , Mohamed Hussein Mahmoud 29 August 2014,Construction and Building MaterialsPre-cast and cured Engineered Cementitious Composites (ECC) strips were placed in the tension cover zone of one-way reinforced concrete (RC) slabs beside the main steel reinforcement. Using pre-cast and cured ECC mitigates issues associated with volumetric changes associated with the ECC material. In order to assess the structural performance enhancement of the new hybrid system, four point bending tests were performed on two different sizes of RC slabs. The tested slabs were geometrically similar in thickness but and differed in their width and span. Small, 300 mm wide × 900 mm long, slabs were strengthened using one 150 × 500 × 20 mm ECC strip. Larger, Engineering
Role of some T-lymphocyte subsets in assessment of treatment response in tuberculous patientsBasem I. El-Shafey, Mohmad M. El-Bedewy, Sherif E. Ezzat, Mohmad AttiaApril 2015Egyptian Journal of Chest Diseases and Tuberculosis, Volume 64, Issue 2Bronchoalveolar lavage CD4% was significantly increased in group III as compared to other groups, CD8% was significantly increased in group IV as compared to other groups, Th1% was significantly high in group III as compared to other groups. Blood CD4% was increased in group III as compared to other groups, CD8% was significantly increased in groups II and IV as compared to other groups, Th1%was significantly decreased in groups II and IV as compared to other groups. Th2% was significantly increased in group IV as compared to other groups. Conclusion CD4, CD8, Th1 and Th2 cells play a major role in immunology against TB infection and can be used as a marker for response to anti-tuberculous treatmentMedicine
Instability through porous media of three layers superposed conducting fluidsKadry Zakaria, Magdy A. Sirwah, Sameh Alkharashi March–April 2009,European Journal of Mechanics - B/Fluids,The instability properties of streaming superposed conducting fluids through porous media under the influence of uniform magnetic field have been investigated. The system is composed of a middle fluid sheet of finite thickness embedded between two semi-infinite fluids. The fluids are assumed to be incompressible, perfectly conducting and there are weak viscous stresses on the interfaces. The Rayleigh–Taylor and Kelvin–Helmholtz problems have been studied. Such configurations are of relevance in a variety of astrophysical and space configurations. The solutions of the linearized equations of motion together with the boundary conditions lead to deriving the dispersion equation with complex coefficients. The limiting case of the stability of one interface between two fluids has been discussed. The stability criteria are discussed theoretically and numerically in which stability diagrams are obtained. It has been found that the increase of the viscosity coefficient as well as the porosity plays a regular stabilizing role in the stability behavior, while the increase of the fluid velocity plays a destabilizing influence in the stability criteria.Science
Clinical performance of a self-etch adhesive in Class V restorations made with and without acid etchingAli I. Abdalla, Franklin Garcia-Godoy July 2007Journal of Dentistry, Volume 35, Issue 7, July 2007, Pages 558-563To evaluate the clinical performance of a self-etching adhesive in Class V carious lesions with and without acid etching procedures.Dentistry
The effect of combined application of new dentin desensitizing agent and deproteinization on dentin permeability of different adhesive systemsN.S. Farghal, A.I. Abdalla, S.M. El-Shabrawy, E.A. ShowaibDecember 2013Tanta Dental Journal, Volume 10, Issue 3, December 2013, Pages 138-144To evaluate the effect of dentin desensitization using casein phosphopeptide amorphous calcium phosphate paste; CPP-ACP, with and without deproteinization (10% sodium hypochlorite), on dentin permeability of two types of self-etch adhesives and a total-etch one.Dentistry
Markovian-model for systems with independent unitsM.A. El-Damcese 7, July 1995,Microelectronics ReliabilityThis paper deals with a system of n-independent repairable units that can be described by a homogeneous continuous-time discrete-state Markov process. Transition probabilities matrix of the system has the form of a modified Kronecker sum of transition-rate matrices of its units is investigatedScience
Stress distribution of implant retained obturators using different types of attachments: A three dimensional finite element analysisM.M. Amer, H.A. Rashad, S. AbdallahDecember 2015Tanta Dental Journal, Volume 12, Supplement 1, December 2015, Pages S30-S40The objective of this study was to analyze the stress distribution around dental implants for different designs of implant supported obturator in cases of midline maxillary defect using a 3-dimensional finite element analysis.Dentistry
Bioremoval of zinc ions by Scenedesmus obliquus and Scenedesmus quadricauda and its effect on growth and metabolismH.H OmarSeptember 2002International Biodeterioration & BiodegradationZinc biosorption by two green algae, Scenedesmus obliquus and Scenedesmus quadricauda, was investigated. Data show that, at concentrates between 0.5 and 8 ppm, zinc adsorption by algae increased with increasing metal ion concentration.Science
The effect of adding magnesium sulphate to epidural bupivacaine and fentanyl in elective caesarean section using combined spinal–epidural anaesthesia: a prospective double blind randomised studyA.A. Yousef, Y.M. AmrOctober 2010International Journal of Obstetric Anesthesia, Volume 19, Issue 4Axial and coronal reformations of 16 slice MDCT have equal sensitivity and specificity for the diagnosis of acute abdominal pathology. However, coronal reformations improved the diagnostic confidence for all readers.Medicine
Efficient code system of core characteristics for small cylindrical thermal reactorAhmed Ebrahim Aboanbera, , Naohiro Hirakawab, Mohammed Omar ShakeraApril 1999Annals of Nuclear EnergyA new code system for the overall neutronic calculation of a thermal reactor by a simple and effective way is presented. The code covers microscopic library compilation, macroscopic constant generation, cell calculations by multi-group treatment for neutron transport equation and core calculations over three zones for fuel and one zone for moderator. The Dancoff correction factor required in the interpolation of the self-shielding factors of resonance nuclides is automatically calculated by the installed collision probability routines. The burn-up calculation and Garrison and Ross model of fission product have been included. Also the effect of control rod on the reactivity of the reactor with special treatment for the control rod based on the homogenization technique has been included. Making a comparison with SRAC95 code system has checked the adopted code.Engineering
Spatial distribution of heavy metals in the middle nile delta of Egypt A. Abd El Halim, Ahmed A. El Baroudy, Ali R. RamadanDecember 2016International Soil and Water Conservation ResearchHeavy metal contamination in the El-Gharbia Governorate (District) of Egypt was identified by using remote sensing, Geographical Information Systems (GIS), and X-ray fluorescence (XRF) spectrometry as the main research tools.Agriculture
Temperature dependence of I-V and C-V characteristics of AlCdTe Schottky diodesM.Abdel NabyJuly–September 1995Renewable EnergyA comparative study was made of rf-sputtered Al on chemically-etched (CE) and sputter-etched (SE) p-CdTe single crystal surfaces. By means of measuring current-voltage, capacitance-voltage and deep level transient spectroscopy (DLTS) characteristics of rf-sputtered Alp-CdTe Schottky junctions formed on both surfaces, it has been found that surface preparation techniques can alter the Schottky junction properties. The I-V measurements are seen to closely follow the diode equation of Schottky barrier diodes dominated by thermionic emission.Engineering
Effect of germination on the nitrogenous constituents, protein fractions, in vitro digestibility and antinutritional factors of fenugreek seeds (trigonella foenum graecum L.)A.Rafik El-MahdyJune 1982Food ChemistryThis study was designed to determine the effect of germination on nitrogenous constituents, protein fractions, in vitro digestibility and antinutritional factors (namely trypsin inhibitor and haemagglutinin) of the Egyptian fenugreek seeds Geiza 2 variety. After 96 h of germination, there was 18% decrease in the dry weight of seeds, a slight increase of total nitrogenAgriculture
Preliminary studies on the mucilages extracted from Okra fruits, Taro tubers, Jew's mellow leaves and Fenugreek seedsAhmed Rafik El-Mahdy1984Food ChemistryOkra fruits, Taro tubers, Jew's mellow leaves and Fenugreek seeds are commonly used in Egypt to prepare popular diets with desired slimy consistency. The mucilages were extracted and preliminary studies conducted to characterise them physically. The pH values of a 1% solution of the mucilages varied from 6·9-7·5 for Okra and Taro, 7·1–7·8 for Jew's mellow, and 5·9-6 for Fenugreek, depending upon extraction conditions. The highest viscosity was observed in Okra solutions, followed by Fenugreek, Jew's mellow and Taro mucilages. Agriculture
Measurement of the physical properties of cyclohexane using a laser interferometric techniqueHassan El-Kashef4, September 1998Optical MaterialsThe refractive index (n) and thermal coefficient of the refractive index (dn/dT) are measured at two laser wavelengths for the nonpolar laser dye solvent cyclohexane. The measurements are carried out using the modified laser Mach–Zehnder interferometric
Endoscopic Injection Therapy (EIT) For Control Of Actively Bleeding Colonic VaricesMamdouh Gabr, Moamen Gabr, Ahmed Gabr May 2016,Gastrointestinal Endoscopy, Volume 83, Issue 5, SupplementEndoscopic Injection Therapy (EIT) For Control Of Actively Bleeding Colonic VaricesMedicine
The effects of adipocytokines on the endocrino-metabolic features and obstetric outcome in pregnant obese women with polycystic ovary syndromeDina Gamal Eldeen Y. Elkholi, Halah M. NagyDecember 2014,Middle East Fertility Society Journal, Volume 19, Issue 4Objective To estimate the effects of adipocytokines on the metabolic and endocrine features, and the obstetric outcome in pregnant women with polycystic ovary syndrome (PCOS). Design Prospective cross sectional study. Main outcome measures: plasma concentration of adipocytokines, insulin resistance/hyperinsulinism (IR/HI), lipid profile, androgens and obstetric outcome. Materials and methods The study included hundred pregnant PCOS (PPCOS) women with android obesity (group 1), 100 pregnant non-PCOS women with android obesity (group 2), 100 PPCOS women with gynoid obesity (group 3), and 100 pregnant non-PCOS women with gynoid obesity (group 4). All patients in the four groups were primigravidae and women with PCOS (groups 1 and 3) became pregnant after treatment with clomiphene citrate and/or gonadotropins. Plasma concentrations of fasting glucose, fasting serum insulin, insulin sensitivity by quantitative insulin sensitivity check index (QUICKI), serum concentrations of triglycerides (TGs), total cholesterol (TC), high density lipoprotein cholesterol, (HDL-c), low density lipoprotein cholesterol (LDL-c); plasma adipocytokines: interleukin (IL)-10, adiponectin (both are insulin sensitizers and anti-inflammatory), pro-inflammatory cytokines: IL-6, prothrombin activator inhibitor-1(PAI-1), high sensitivity C-reactive protein (hsCRP); serum total testosterone (TT), sex-hormone binding globulin (SHBG), free androgen index (FAI) were estimated for the four groups between 22 and 24 weeks’ gestation Glucose loading test was done at 22–24 weeks’ gestation to check for gestational diabetes mellitus and if normal it was repeated at 30–34 weeks. Gestational hypertension (GH), preeclampsia (PE) and preterm labor (PTL) (delivery <37 weeks’ gestation) were recorded. Results Groups 1 and 2 with android obesity had IR/HI, (QUICKI < 0.331 ± 0.010). Groups 3 and 4 with gynoid obesity had normal insulin sensitivity (NIS), (QUICKI > 0.331 ± 0.010). Serum concentration of TGs, LDL-c, and plasma concentration of IL-6, PAI-1, hsCRP were significantly higher in groups 1 and 2 than groups 3 and 4. Serum HDL-c, plasma IL-10 and adiponectin were significantly higher in groups 3 and 4 than groups 1 and 2. Serum TT and FAI were significantly higher in groups 1 and 3 (cases of PPCOS) than their controls. There was no significant difference in the serum concentration of TC between the four groups. Incidence of spontaneous early miscarriage (SM) in groups 1, 2, 3, and 4 was 36%, 12%, 33%, and 11% respectively. Incidence of SM was significantly higher in PPCOS than non-PCOS pregnancy irrespective of the type of obesity. Rate of late pregnancy complications, GDM, GH, PE and PTL was significantly higher in groups 1 and 2 with android obesity than groups 3 and 4 with gynoid obesity. There was no significant difference in the rates of cesarean section (CS) between the 4 groups. The rates of neonatal complications and perinatal mortality were significantly higher in groups 1 and 2 (android obesity) than groups 3 and 4 (gynoid obesity). Conclusion 1. TT and FAI were significantly higher in PPCOS with android obesity than PPCOS with gynoid obesity. 2. Incidence of early SM (9–12 weeks) was significantly higher in PPCOS than in non-PCOS pregnancy irrespective of the type of obesity. 3. Incidence of late-onset pregnancy complications, GDM, GH, PE and PTL was significantly higher in patients with android obesity than patients with gynoid obesity. PCOS per se seemed to be not related to the incidence of late-onset pregnancy complications.Pregnant patients with android obesity, (both PCOS and non-PCOS) with diminished serum concentration of anti-inflammatory cytokines, and increased serum concentration of pro-inflammatory cytokines had IR/HI and dyslipidemia. Pregnant patients with gynoid obesity, (both PCOS and non-PCOS) with normal serum concentration of anti- and pro-inflammatory cytokines had NIS and normal lipid profile. 4. In pregnancy with android obesity patients had reduced plasma concentration of IL-10 and increased concentration of IL-6 which may impair the development of the placenta with increased risk of PTL. 5. Neonatal complications and perinatal mortality were significantly higher in PPCOS with android obesity than PPCOS with gynoid obesity.Medicine
Analytical evaluation of reliability models for multiplex systemsM.A. El-DamceseJune 1995Microelectronics ReliabilitySystem reliability can be modelled by a continuous time homogeneous Markov process whenever the components of such a system have constant failure and repair rates. This work presents a generalized Markovian model for a system of n-identical/nonrepairable components. The transition probability matrix and the associated set of 2n differential equations are fully described. As an illustration, a system of four-identical/repairable components is completely analysed.Science
The effect of the mass number of the scattering nuclei on energy storage in compressed nuclear matterN.Z. Darwish, S.S. Saad, Kh.M. Omar, El-Sharkawy5, May 1993Applied Radiation and Isotopes, The el 27Al and 28Si has been analysed in the frame work of the effective surface potential model. The effect of the mass number A of the elastic scattering nuclei on the coefficient of compressibility has been
Ameliorative potential of gemfibrozil and silymarin on experimentally induced nephrotoxicity in rats A.M. Kabel, H.A. Mahmoud, S.S. El KholyDecember 2013African Journal of Urology, Volume 19, Issue 4Gemfibrozil and/or silymarin efficiently attenuated cisplatin-induced nephrotoxicity evidenced by significant decrease in blood urea, serum creatinine, urinary N-acetyl beta-d-glucosaminidase, urinary protein, tissue malondialdehyde and tissue tumour necrosis factor alpha with significant increase in creatinine clearance, tissue reduced glutathione, tissue superoxide dismutase and mitochondrial complex I activity simultaneous with reduction of the necrotic damage and progressively increasing apoptotic index assessed by renal histopathological examination compared to the cisplatin treated group. Conclusion The combination of gemfibrozil and silymarin has protective effects against cisplatin-induced nephrotoxicity in rats better than each of these drugs alone due to anti-inflammatory and antioxidant properties of the used drugs.Medicine
Evaluation of upper and lower pharyngeal airway in hypo and hyper divergent Class I, II and III malocclusions in a group of Egyptian patientsAtia Abd Elwareth Abd Elrazik YousifDecember 2015Tanta Dental Journal, Volume 12, Issue 4, December 2015, Pages 265-276Significant relationships between the pharyngeal structures and both dento-facial and craniofacial structures have been reported. Hyper-divergent patients may lead to narrower antero-posterior dimensions of the airway. Some authors associated vertical growth pattern with obstruction of the upper and lower pharyngeal airways others associated mouth breathing and Class II malocclusion. So the aim of this study was to assess the upper and lower pharyngeal airway width in different antero-posterior and vertical growth patterns and to evaluate sexual dimorphism in a group of Egyptian patients.Dentistry
Quantitative assessment of liver fibrosis in chronic viral hepatitis C patients using shear wave elastography with elastography point quantification featureRania E. Mohamed, Mohamed A. Amin, Hazem M. Omar, Mohamed Y. Rabea, Mona A. Abd ElazeemMarch 2017The Egyptian Journal of Radiology and Nuclear Medicine, Volume 48, Issue 1The ElastPQ SWE technique appears as a reliable non-invasive tool that can provide an optimal way to monitor liver tissue stiffness in patients with chronic HCV infection with high accuracy (97.6%) in recognition of the earlier fibrosis stage (F2).Medicine
Cleaning efficacy of different root canal preparation systems and irrigation regimensW.M. Ghoneim, A.M. Farag, A.H. Labib, A.M. DarragApril 2014Tanta Dental Journal, Volume 11, Issue 1, April 2014, Pages 36-41To compare the cleaning efficacy of root canal walls after using two Nickel–Titanium (Ni–Ti) rotary files (Flexmaster and Mtwo) and one hand Ni–Ti file (Ni–Ti flex-K) when associated with different final irrigation regimens (SmearClear, 17% ethylene diamine tetra acetic acid (EDTA) and sodium hypochlorite).Dentistry
New diagnostic biomarker in acute diarrhea due to bacterial infection in childrenHassan M. Al-Asy, Rasha M. Gamal, Ahmed Abd Albaset, Mohammed G. Elsanosy, Maali M. Mabrouk13 February 2017International Journal of Pediatrics and Adolescent MedicineBoth serum PCT and sTREM-1 are valuable in the early diagnosis of acute bacterial infection-induced diarrhea in children, and there was markedly higher diagnostic discriminatory power for sTREM-1.Medicine
Clinical assessment of a nanohybrid and silorane low shrinkage composite in class I cavity preparation (preliminary report)M. El-Eraky, W. Abdel-Fattah, M. El-SaidAugust 2014Tanta Dental Journal, Volume 11, Issue 2, August 2014, Pages 130-138The purpose of this study was to evaluate and compare the clinical performances of two different posterior composites in Class I restorations.Dentistry
Magnetic properties of the Ni–Cu–Zn system doped with magnesium oxideO.M. Hemeda, A. Tawfik, D.M. Hemeda, A.M. ElsheekhSeptember 2015Journal of Magnetism and Magnetic Materials, Volume 390, 15 September 2015, Pages 70-77charge carriers concentration and charge carrier mobility have been calculated at different temperatures.Dentistry
Suppression of Bacterial Multiplication in Compatible and Incompatible Host-Parasite RelationshipsF. Mehiar, Z. Klement, M. Hevesi1982Zentralblatt für MikrobiologieThe multiplication of compatible bacteria (Pseudomonas tabaci) and incompatible bacteria (P. pisi) in tobacco leaf tissues is suppressed when the leaves were infiltrated with the supernatant of sonicated cells of P. fluoresceins 6 hours before challenge. Suppression of the bacterial multiplication is not light dependent through the early protection period.Agriculture
Kinetics and mechanism of the heterogeneous catalyzed oxidative degradation of indigo carmineAli H. Gemeay, Ikhlas A. Mansour, Rehab G. El-Sharkawy, Ahmed B. Zaki17 February 2003,Journal of Molecular Catalysis A: ChemicalThe kinetics of the oxidative degradation of the indigo carmine (IC) dye (disodium salt of 3,3-dioxobi-indolin-2,2-ylidine-5,5-disulfonate) with hydrogen peroxide catalyzed with the supported metal complexes have been investigatedscience
Evaluation of maxillary sinus membrane repair using two different sutureless techniquesR.A.E. Abdussamad, A.A. Sadakah, O.M. Gab Allah, I.M. NowairDecember 2015Tanta Dental Journal, Volume 12, Issue 4, December 2015, Pages 225-234The aim of this experimental study was to evaluate the repair of maxillary sinus membrane clinically and histologically using two different sutureless techniques.Dentistry
Nonlinear instability of a liquid jet in the presence of a uniform electric fieldKadry Zakaria6, June 2000, Fluid Dynamics Research, sssssssssscience
Measurement of the physical properties of cyclohexane using a laser interferometric techniqueG.E. Hassan, H. El-Kashef, B.Y. El-Baradie, M. El-Labban May 1996Optical MaterialsA laser Mach-Zehnder interferometric modified technique providing the necessary high precision measurements of the physical properties of the most frequently used solvents for laser dyes is
Randomized controlled trial of scleroligation versus band ligation alone for eradication of gastroesophageal varicesLoai Mansour, Ferial El-Kalla, Hanan El-Bassat, Sherief Abd-Elsalam, Mohamed El-Bedewy, Abdelrahman Kobtan, Rehab Badawi, Mohamed Elhendawy9 January 2017Gastrointestinal Endoscopy, Gastric varices develop in 5% to 33% of patients with portal hypertension. Their most common form is concomitant gastroesophageal varices. Scleroligation (combined sclerotherapy and band ligation) has been used successfully in management of esophageal varices but has not been evaluated previously in the management of gastroesophageal varices. The aim of this work was evaluation of a new scleroligation technique for management of bleeding gastroesophageal varices regarding efficacy, adverse events, variceal recurrence, and survival.Medicine
Intraoral distraction osteogenesis for the correction of facial deformities following temporomandibular joint ankylosis: a modified techniqueA.A. Sadakah, R.F. Elgazzar, A.I. AbdelhadyMay 2006International Journal of Oral and Maxillofacial Surgery, Volume 35, Issue 5, May 2006, Pages 399-406The aim of this study was to evaluate the feasibility of transoral bimaxillary distraction osteogenesis before releasing temporomandibular joint (TMJ) ankylosis using intraoral mandibular distractors. Nine patients (5 males, 4 females) aged 14–35 (mean 19) years were included. A bilateral Le Fort I osteotomy was performed together with a mandibular osteotomy on the affected side(s). An intraoral distractor(s) was inserted in the lower jaw, followed by an intermaxillary fixation (IMF) to maintain preoperative dental occlusion. The distractor was activated, after a latency period of 5–7 days, 2 times daily by 0.5 mm. There followed a consolidation period of 6–8 weeks. TMJ ankylosis was then released via a peri-auricular incision, a gap arthroplasty was performed, and mandibular movement was established after removal of the IMF and distractor. Optimal results were achieved clinically and radiologically with minimal relapse and complications. Apart from minor complaints, the distraction process was smooth and tolerable in all cases. Total mandibular elongation ranged from 17 to 25 mm (20.7 mm). Occlusal canting decreased to 0° in 7 patients and to 1° in 2 patients (mean 0.2°). After a mean follow-up period of 17 months, a mean postoperative mouth opening of 34.7 mm was achieved (0.6 mm preoperatively) and no re-ankylosis was detected. Intraoral distraction of a deformed mandible and maxilla before releasing TMJ ankylosis is a feasible and perhaps advantageous technique.Medicine
Computational simulation of the effect of quantum chemical parameters on the molecular docking of HMG-CoA reductase drugsFaten M. Atlam, Mohamed K. Awad, Eman A. El-Bastawissy5 October 2014Journal of Molecular Structure, Volume 1075,Density functional theory (B3LYP-6-31G(d)) was performed to study the effect of molecular and electronic structures, of 2-cyclopropyl-4-thiophenyl-quinoline mevalonolactones as potential hypocholesterolemic inhibitors, on their biological activities and discuss the correlation between the inhibition efficiency and quantum chemical parameters. Molecular docking was performed to investigate the mode of interactions between the investigated inhibitors and the active sites of the target Hydroxymethylglutaryl-Coenzyme A(HMG-CoA) reductase. The results could suggest further structural modifications to discover more potent and selective HMG-CoA reductase inhibitors. The catalytic active sites of HMGR have a positive electrostatic potential which is complemented with a negative electrostatic potential of the investigated drugs to form a stabilized complex. The presence of lipophobic groups, such as quinoline nucleus, cyclopropyl and substituted thiophenyl groups as well as a lactone moiety, is important for binding to the active sites. A good correlation between the experimental and theoretical data confirms that the quantum chemical methods and molecular docking studies are successful tools for enriching screening experiments aimed at the discovery of novel bioactive compounds.Pharmacy
Diagnostic value of procalcitonin and C-reactive protein in differentiation between some benign and malignant pleural effusionsWafaa S. El-Shimy, Ghada A. Attia, Sahar M. Hazzaa, Yousef M. Mansour, Walaa M. Abd El-HalimOctober 2014Egyptian Journal of Chest Diseases and Tuberculosis, Volume 63, Issue 4Pleural effusion is relatively common clinical condition that requires differential diagnosis. It is defined as collection of fluid in pleural space. Pleural effusion is often diagnostic dilemma for the physician. The aim of the study was to assess the procalcitonin (PCT) and C reactive protein (CRP) levels in serum and pleural fluid to evaluate their usefulness in the differentiation among benign and malignant pleural effusions. This study was conducted in Chest Department, Tanta University Hospital, it included 54 adult patients with pleural effusions of different etiologies, 8 transudative effusion, 14 para pneumonic effusion, 14 tuberculous effusion and 18 malignant effusion. We measured serum and pleural procalcitonin and C reactive protein by ELISAMedicine
Evaluation of benign and malignant vertebral lesions with diffusion weighted magnetic resonance imaging and apparent diffusion coefficient measurementsKhaled Abdel Wahab Abo Dewan, Alsiagy A. Salama, Hassan Mostafa Saber El habashy, Ayman El Sayed KhalilJune 2015The Egyptian Journal of Radiology and Nuclear Medicine,The aim of this study was to assess the utility of apparent diffusion coefficient obtained in diffusion-weighted MR imaging for the differentiation between benign and malignant vertebral lesions, and to determine the sensitivity and the specificity in differentiating benign and malignant vertebral lesions according to the optimal cutoff ADC value. Vertebral lesions were differentiated as benign or malignant with high sensitivity and specificity with the aid of ADC values calculated from maps obtained by DWI.Medicine
absorbed dose catalytic monomerization of 9-cyanoanthracene photodimer in the solid stateEl-Zeiny M. Ebeid, Morsy M. Abou Sekkina, Raafat M. Issa, Saleh A. Azim 9, September 1983The International Journal of Applied Radiation and Isotopesaaaaaaaaaaaaaaaaaaaaaaaaaaaascience
Chemically modified poly(methyl methacrylate) resin-bound triphenyl-phosphonium bromide as halogen-carrier M. Hassanein, A. Akelah, A. Selim, H.El Hamshary10, 1989,European Polymer Journalnsoluble polymer-bound triphenylphosphonium perbromide was prepared by chemical modification of poly(methyl methacrylate) resin. The polymeric reagent was used for the bromination of alkenes, carbonyl compounds and arenes under mild conditions. In addition to the excellent yields of the brominated products and the ease and simplicity of the method, the resulting polymeric by-product could be simply regenerated and re-usedScience
Study of the vacancy jumpsA. Tawfik June 1995Solid State Communications Thermal frequency, relaxation time, the number of vacancy jumps per secondscience
Putative role of epithelial rests of Malassez in alleviation of traumatic occlusionM.B. Helal, M. Abd-Elmotelb, N.H. Sarhan, N.B. NagyDecember 2015Tanta Dental Journal, Volume 12, Issue 4, December 2015, Pages 292-301Epithelial cell rests of Malassez (ERM) are odontogenic epithelial cells located throughout life within the periodontal matrix. It has long been thought to be a functionless remnant, though recent studies suggested their role in periodontium regeneration and homeostasis.Medicine
BMI is inversely correlated to the risk of mortality in patients with type 2 diabetes hospitalized for acute heart failure: Findings from the Gulf aCute heArt failuRE (Gulf-CARE) registryCharbel Abi Khalila, b, c, , , Kadhim Sulaimand, Rajvir Singhe, Amin Jayyousif, Nidal Asaadc, Khalid F AlHabibg, Alawi Alsheikh-Ali, Mohammed Al-Jarallah, Bassam Bulbana, Wael AlMahmeed, 27 February 2017International Journal of CardiologyA U-shaped relationship has been reported between BMI and cardiovascular events among patients with acute heart failure (AHF). We hypothesized that an obesity paradox also governs the relationship between BMI and mortality in patients with type 2 diabetes (T2D) and AHF.Medicine
Optimized and validated spectrophotometric methods for the determination of trace amounts of uranium and thorium usingAhmed S. Al-Kady20 May 2012Sensors and Actuators B: ChemicalA facile, rapid and sensitive spectrophotometric method for the determination of trace amountsscience
Apparent diffusion coefficient and Magnetic resonance spectroscopy in grading of malignant brain neoplasmsMahmoud Abd Elaziz Dawoud, Mohamed Fouad Sherif, Mohamed Adel EltomeyDecember 2014The Egyptian Journal of Radiology and Nuclear Medicine, Volume 45, Issue 4This work aims to study the role of combined apparent diffusion coefficient (ADC) and Magnetic resonance spectroscopy (MRS) in grading malignant brain neoplasms. Methods A prospective study included 40 patients who were evaluated by standard contrast enhanced MRI, diffusion weighted imaging and multivoxel spectroscopy. Results Statistically significant difference was found between tumoral ADC values in low grade versus high grade tumors and metastasis and also between the peritumoral ADC values in metastasis versus low and high grade tumors. Statistically significant difference is noticed between tumoral Cho/Cr ratio values in low grade versus high grade tumors and metastasis, and also peritumoral Cho/Cr ratio values in low grade and metastasis versus high grade tumors. Statistically significant difference between tumoral Cho/NAA ratio in low grade versus high grade tumors and metastasis and lastly between peritumoral Cho/NAA ratio in low grade and metastasis versus high grade tumors was found. Lipid and lactate peaks were found frequently in high grade tumors and metastasis. Conclusion The combination of calculated ADC values and MR spectroscopy is useful in grading of malignant brain tumors and were more useful together than each on its own.Medicine
Dielectric behavior and ac electrical conductivity of Zn-substitutedM.A. El Hiti 2 November 1996Journal of Magnetism and Magnetic Materials,he effect of temperature, frequency and composition on the dielectric behavior and ac electrical conductivity were studied for a series of Zn-substitutedScience
Effect of immunomodulator, fingolimod, on ischemia reperfusion testicular injury in rats: Targeting the role of sphingolipid rheostat (fingolimod on I/R induced testicular injury)Marwa N. Emam, Rania N. Abd El-latif25 July 2016Alexandria Journal of MedicineFTY720 treatment of I/R group resulted in significant reduction in I/R induced elevation in testicular GSH-Px, SOD, MDA and total ceramide level, along with significant increase in testicular catalase, sphingomyelin and sphingosine-1-phosphate. Also, FTY720 treatment of I/R group improved severe testicular injury changes in I/R group. Conclusion FTY treatment may be used as potential therapeutic treatment for I/R induced testicular injury.Medicine
Durability of bond strength of glass-ionomers to enamelE.A. Shebl, W.M. Etman, Th.M. Genaid, M.E. Shalaby March 2015Tanta Dental Journal, Volume 12, Issue 1, March 2015, Pages 16-27To evaluate the shear bond strength of a new generation of glass ionomer (Glass Carbomer) to enamel versus a nano-filled resin-modified glass ionomer (ketac Nano) and a conventional type after different storage periods.Dentistry
Semiempirical investigation of the inhibition efficiency of thiourea derivatives as corrosion inhibitorsMohamed K. Awad15 June 2004, Journal of Electroanalytical ChemistryThe inhibition of corrosion of iron by thiourea (TU) and its N-substituted derivatives has been investigated using semiempirical molecular orbital theory. The high efficiency of TU with low concentration is attributed to strong adsorption of molecular species through the active center C–S bond. The protonation process appeared to be the effective parameter at high concentration with lowering of the inhibition efficiency of the TU. Alkyl N-substituted TU with the least protonation and with the maximum adsorption is a better inhibitor than TU and aryl N-substituted TU. The thiocarbohydrazide molecule shows the least efficiency of our investigated inhibitors with the highest protonation due to high charge density on the sulphur atom, lengthening and weakening of the C–S bond, and high reactivity with small energy separation between the frontier molecular
Treatment of children with HBeAg-positive chronic hepatitis B: A systematic review and meta-analysisAzza El Sherbini, Asmaa OmarDecember 2014Digestive and Liver Disease, Volume 46, Issue 12Interferon-alpha is still the most effective treatment option for children with HBeAg-positive chronic hepatitis B. Randomized trials are warranted for further comparing interferon to newer antiviral agents in terms of efficacy, safety, emergence of mutant variants, and cost/benefit ratio.Medicine
Higher-order moments, cumulants and spectral densities of the NGINARHassan S. Bakouch1, January 2010Statistical MethodologyThe motivation for time series with geometric marginal distributions arises from noting that the Poisson distribution is not always suitable for the modeling and analysis of integer-valued time seriesscience
Nasal Drug Delivery of a Mucoadhesive Oxybutynin Chloride Gel: In Vitro Evaluation and In Vivo in Situ Study in Experimental RatsS.A. El-Gizawy, M.A. Osman, S.M. El-Hagaar, D.M. Hisham2013,Journal of Drug Delivery Science and Technology, Volume 23, Issue 6,Nasal drug delivery (NDD) is a promising approach for rapid-onset delivery to circumvent first-pass elimination when taken orally. The feasibility of developing an efficacious nasal formulation of oxybutynin chloride (OXB) has been investigated as its oral Pharmacy
Risky behaviors for HIV infection are common among studied addicts. Their risk perception and knowledge about HIV/AIDS was, however, found defective. There is urgent need for outreach programs to increase their awarness about harm reduction meaures.M.A. Abd El-Hay, H.F. El Sawy, A.A. Badawy2011European Psychiatry, Volume 26, Supplement 1Multiple factors were associated with risk of recurrence of bipolar I disorder during pregnancy and postpartum, which should be while planning treatment for such women.Medicine
Spectral behavior studyM. Gaber, Y.S. El-Sayed, H. Diab3, April 2011Optics & Laser TechnologyThe photophysical properties such as singlet absorption, molar absorptivity, fluorescence spectra, fluorescence quantum yieldscience
Fracture resistance of all ceramic crowns supported by zirconia and alumina versus titanium implant abutmentsA.F. El-S'adany, G.E. Masoud, M.S. Kamel, A.M. KorselDecember 2013Tanta Dental Journal, Volume 10, Issue 3, December 2013, Pages 103-111High-strength ceramic materials can be used to fabricate esthetic and stable implant-supported single-tooth abutment. Study compared in vitro the fracture resistance of individual components of single-tooth implant-supported all-ceramic restorative systems after artificial aging and analyzing mode of failure using scanning electron microscope.Dentistry
Effect of vacancy jump rate on the permeability and dielectric properties of NiA Tawfik, O.M Hemeda November 2002Materials Letters,The dielectric hysteresis loops were displayed for different Cu concentrations and showed a decrease in the dielectric polarization. This evidence confirmed the effect of vacancy jump rate on the decrease of relative permeability and dielectric constant.Science
Effect of processing and storage on protein and lipid composition of peasAhmed A. El-Refai, Mahmoud S. Gouda,.Kamal A. Ammar 1987Food ChemistryChanges in protein and lipid contents of peas (P. sativum L.) at various stages of processing and storage at different temperatures over a six-month period were studied. Blanching had very little effect on protein or protein amino acids of peas while free amino acids were greatly affected. Agriculture
Enhancement of heat and mass transfer performance on humidification tower using injection of different carrier gases into water bedMofreh H. Hameda, , A.E. Kabeelb, , Emad M.S. El-Saidc, , 25 January 2017Applied Thermal EngineeringThe present study is presented an approach attempting for enhancement of heat and mass transfer between a continuous gas phase and liquid phase in a non-packed humidification towers by injection of different carrier gases such as air, carbon dioxide and helium through water bed. The computational technique utilized was a three-dimensional Navier-Stokes solver in the laminar flow regime with free-surface simulation in Piecewise Linear Interface Construction method to compute density variation on the two-dimensional two-phase flow field and pressure on a water bed. This work studied the influence of the operating conditions such as the water bed temperature and carrier gas type on the overall gas phase heat and mass transfer coefficient. The present study included also determining the overall pressure drop of the carrier gases through water bed, consumed power and humidification efficiency. It has been found that the mass transfer coefficient increases with increasing carrier gas molecular weight. The heat transfer coefficients are more than 5 times for carbon dioxide than air flow and less for helium than air, about 50% flow at water bed temperature 353 K. The mass transfer coefficients are more than 2.5 times for helium than air and less for carbon dioxide than air, about 50% at water bed temperature 353 K. The obtained maximum humidification efficiency of the helium was about 87%. The pressure drop was about 51.4 kPa for helium and 47.2 kPa for carbon dioxide at a water bed temperature 353 K. The consumed power was about for helium about 45.45 W and for carbon dioxide was 41.25 W at a water bed temperature 353 K. The comparison between the numerical and other experimental results shows a good matching of outlet humidity ratios