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Bani Suwayf, Egypt

Beni-Suef University is an institution of higher education located in Beni-Suef city, Egypt. Wikipedia.

Three stratigraphic sections (Wadi El Dakhl, Abu Darag and Gabal Ataqa) of mixed siliciclastic/carbonate rocks mark the Cenomanian-Turonian sequence exposed on the western side of the Gulf of Suez. This sequence is differentiated into two rock-units: the Galala Formation of Cenomanian age, and the Turonian Wata/Maghara El Hadida Formation. They comprise various sedimentary facies belts that reflect minor fluctuations of sea-level from mudflat to deep subtidal setting. Four facies belts are recognized in this succession. They are peritidal clastic (mudflat, mixed flat and sandflat facies), peritidal carbonate, shallow subtidal (high energy shallow subtidal; low energy, shallow subtidal; and storm-influenced, shallow subtidal, open marine facies) and deep subtidal. Five sequence boundaries marking relative sea-level falls divide the Cenomanian-Turonian succession into four depositional sequences. These boundaries are: Lower Cretaceous/Cenomanian (SB1), Middle Cenomanian (SB2), Middle Turonian (SB3), Late Turonian (SB4) and Turonian/Coniacian (SB5). These delineate four well-defined third-order depositional sequences. They enclose shallowing-upward (prograding) parasequences and record the fourth order relative sea-level fluctuations. Each depositional sequence shows lowstand (LST), transgressive (TST) and highstand (HST) systems tracts and packages of facies. These sequences are compared with those of neighbouring areas to differentiate local, regional and global factors that controlled sedimentation within the study area. © 2012 Elsevier Ltd. Source

Mahmoud A.M.,Beni Suef University
Experimental and Toxicologic Pathology | Year: 2012

Flavonoids are non-nutritive dietary components that are widely distributed in plants. The present study was undertaken to examine the protective influence of rutin, a polyphenolic flavonoid, on oxidative stress during ammonium chloride (AC)-induced hyperammonemia by measuring the levels of oxidative damage as well as antioxidant status. The levels of tissue (liver, brain and kidney) lipid peroxides and the antioxidants (total thiols, catalase, reduced glutathione and glutathione peroxidase) were analyzed. Hyperammonemia was induced by daily intraperitoneal injections of AC at a dose of 100. mg/kg body weight for 8. weeks. Decreased levels of tissue lipid peroxidation accompanied with increased antioxidant levels in hyperammonemic rats were observed during oral administration of rutin (50. mg/kg body weight), which clearly shows the antioxidant property of rutin. The study of induction of the antioxidant status is considered to be a reliable marker for evaluating the antiperoxidative effect of the polyphenolic compound. Our present findings show the protective role of rutin against lipid peroxidation and suggest that rutin possesses antioxidant potential that may be used for therapeutic purposes. © 2011 Elsevier GmbH. Source

Mansour E.,Beni Suef University
Journal of Non-Crystalline Solids | Year: 2011

Fourier transformation infrared spectra, density and DC electrical conductivity of 30Li2O • xCeO2(70 - x)B 2O3 glasses, where x ranged between 0 and 15 mol%, have been investigated. The results suggested that CeO2 plays the role of network modifier up to 7.5 mol%. At higher concentrations it plays a dual role; where most of ceria plays the role of network former. The density was observed to increase with increasing CeO2 content. The effect on density of the oxides in the glasses investigated is in the succession: B2O 3 < Li2O < CeO2. Most of CeO2 content was found to be associated with B2O3 network to convert BO3 into B O4 - units. The contribution of Li+ ions in the conduction process is much more than that due to small polarons. The conductivity of the glasses is mostly controlled by the Li+ ions concentration rather than the activation energy for CeO 2 > 5 mol%. Lower than 5 mol% CeO2 the conductivity is controlled by both factors. The dependence of W on BO4 - content supports the idea of ionic conduction in these glasses. © 2010 Elsevier B.V. All rights reserved. Source

Khalifa Z.S.,Beni Suef University
Solar Energy Materials and Solar Cells | Year: 2014

Titanium dioxide thin films were deposited by metal-organic chemical vapor deposition (MOCVD) on soda-lime and indium tin oxide (ITO) coated glass substrates at 400 C. X-ray diffraction (XRD) studies revealed that the deposited films have a pure anatase phase. Thickness of the film was measured by scanning electron microscopy (SEM). Atomic force microscopy was used to study the morphology of the deposited films. Depth profiling was monitored by using secondary ion mass spectroscopy (SIMS). Cyclic voltammetry indicates that the transport of Li ions in the TiO2 thin film is diffusion limited. Chronoamperometry and its corresponding optical modulation measurements show that the increase of the quantity of inserted charge causes the appearance of two absorption bands, and a blueshift of the TiO2 film absorption edge. The observed optical changes were attributed to band gap broadening. © 2014 Elsevier B.V. Source

Ahmed R.G.,Beni Suef University
Food and Chemical Toxicology | Year: 2011

This study tested whether maternal exposure to 2,3,7,8-tetrachlorodibenzo-. p-dioxin (TCDD) may disrupt the development of neuroendocrine system of their offspring during the perinatal period. TCDD (0.2 or 0.4μg/kg body weight) was orally administered to pregnant rats from gestation day (GD) 1 to lactation day (LD) 30. Potential effects on neuroendocrine function were evaluated by measuring serum thyroid hormone levels in pregnant rats and their offspring and measuring some biochemical parameters in cerebellum of these offspring on GD 16 and 19, and LD 10, 20, and 30. In both treated groups, a decrease in serum thyroxine (T4), triiodothyronine (T3) and increase in thyrotropin (TSH) levels were noticed during the tested days in dams and offspring, as well as GH levels were decreased in offspring with respect to control group. In cerebellum of control offspring, the levels of monoamines, γ-aminobutyric acid (GABA) and acetylcholinesterase (AchE) were found to be increased from GD 16 to LD 30. The hypothyroid conditions due to both maternal administrations of TCDD produced inhibitory effects on monoamines and AchE, and stimulatory actions on GABA in cerebellum of offspring. These alterations were dose and age dependent. Overall, these results suggest that TCDD may act as neuroendocrine disruptor. © 2011. Source

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