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Cairo, Egypt

Banha University is an Egyptian university in the Egyptian city of Banha, the capital of Al Qalyubiyah governorate.It was established according to a decree in 25 November 1976 as a branch from Zagazig University in Banha, with the faculties of Commerce, Education, Agriculture of Moshtohor, Engineering of Shobra and Medicine.In 1981–1982, the faculties of Arts, Science of Banha and Veterinary Medicine of Moshtohor were founded. On 1 August 2005 it became an independent university from Zagazig University. The previous president of the university is Professor Hosam-ed-din Mohammad Al-Attar and then professor Mohamed Safwat Zahran, now Professor Ali Shams Aldeen. Wikipedia.

Farag Ali A.,Center for Fundamental Physics | Farag Ali A.,Benha University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2014

An emergence of cosmic space has been suggested by Padmanabhan in [1]. This new interesting approach argues that the expansion of the universe is due to the difference between the number of degrees of freedom on a holographic surface and the one in the emerged bulk. In this paper, we derive, using emergence of cosmic space framework, the general dynamical equation of FRW universe filled with a perfect fluid by considering a generic form of the entropy as a function of area. Our derivation is considered as a generalization of emergence of cosmic space with a general form of entropy. We apply our equation with higher dimensional spacetime and derive modified Friedmann equation in Gauss-Bonnet gravity. We then apply our derived equation with the corrected entropy-area law that follows from Generalized Uncertainty Principle (GUP) and derive a modified Friedmann equations due to the GUP. We then derive the modified Raychaudhuri equation due to GUP in emergence of cosmic space framework and investigate it using fixed point method. Studying this modified Raychaudhuri equation leads to nonsingular solutions which may resolve singularities in FRW universe. © 2014 The Author. Source

Objective: To evaluate the effect of laparoscopic ovarian drilling (LOD) on plasma levels of anti-Müllerian hormone (AMH) and ovarian stromal blood flow changes, by using three-dimensional power Doppler ultrasonography, in polycystic ovary syndrome (PCOS). Design: Prospective controlled study. Setting: Taiba hospital, Kuwait. Patient(s): Twenty-three anovulatory clomiphene citrate (CC)-resistant women with PCOS and 20 fertile women as a control group. Intervention(s): Laparoscopic ovarian drilling. Mean Outcome Measure(s): Serum levels of AMH, ovarian three-dimensional power Doppler indices (vascularization index, flow index, and vascularization flow index) and occurrence of ovulation or pregnancy. Result(s): Plasma AMH and power Doppler indices of ovarian stromal blood flow were significantly higher in the PCOS group than in the control group. Plasma AMH and ovarian stromal blood flow Doppler indices were significantly reduced in the PCOS group after LOD. Women who ovulated after LOD had a significantly lower preoperative AMH compared with the nonresponders. There was a significant positive correlation between AMH and power Doppler flow indices before and after LOD in PCOS group. Conclusion(s): Measuring AMH and ovarian stromal three-dimensional power Doppler blood flow for women with anovulatory PCOS undergoing LOD may provide a useful tool in evaluating the outcome of LOD. © 2011 by American Society for Reproductive Medicine. Source

Nickel ferrite (NiFe2O4) nanoparticles were prepared using sol-gel technique; while Polyaniline (PANI)/NiFe2O4 nanocomposites were synthesized via chemical oxidative polymerization of aniline monomer (ANI) in the presence of various ferrite amounts (nickel ferrite/ANI = 2.5, 5, 25 and 50 wt%). The morphology, structure, magnetic, electrical and microwave absorption properties of ferrite powders and nanocomposites were characterized by Fourier transform infrared (FTIR), powder X-ray diffraction (XRD), UV-vis absorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), four-point probe resistivity instrument and vector network analyzer. The crystalline size of nickel ferrite was found in the range of 23-27 nm. The results of TGA, FTIR and UV-vis spectra indicated that nickel ferrite particles improved the thermal stability of composite, and there were interactions between ferrite particles and PANI. The nanocomposites under applied magnetic field exhibited the hysteresis loops of ferromagnetic nature at room temperature. The conductivity of all measured samples decreased with decreasing temperature, exhibiting typical semiconductor behavior. The microwave absorbing properties of the nickel ferrite and composite specimens with the coating thickness of 2 mm were investigated using waveguide method in the frequency range of 1-6 GHz. The results showed a microwave absorption band with frequency shifts to the higher frequency region with the increase in PANI content. The maximum reflection loss reaches -12.5 dB at 2.5 GHz for the nickel ferrite and -20.3 dB at 3.78 GHz for the composite containing 95 wt% aniline. The electronic and magnetic properties of the nanocomposites are tailored by controlling the ferrite content. © 2014 Elsevier B.V. Source

Ali A.F.,Benha University
Journal of High Energy Physics | Year: 2012

We investigate the impact of the Generalized Uncertainty Principle (GUP), proposed by some approaches to quantum gravity such as String Theory and Doubly Special Relativity Theories (DSR) on the production of mini black holes, and show that the minimum black hole mass is formed at energies higher than the energy scales of LHC which possibly agrees with the recent experimental results of LHC [1, 2]. © SISSA 2012. Source

El-Sayed G.O.,Benha University
Desalination | Year: 2011

The ability of palm kernel fiber (PKF) to adsorb methylene blue (MB) and crystal violet (CV) from aqueous solutions has been studied. Adsorption studies were carried out at different initial dye concentrations (20, 40, 80 and 160mg/L), contact time, pH (1.0-11.0) and sorbent doses (0.4, 2.0, 4.0 and 8.0g/L). Other factors affecting the absorption process as stirring rate, ionic strength and temperature of the initial dye solution were also examined. Adsorption data were modeled using Langmuir, Freundlich and Temkin adsorption isotherms. Equilibrium data of the biosorption process fitted very well to the Freundlich model (R2=0.997 and 0.991 for MB and CV, respectively). The thermodynamic parameters such as δH°, δS° and δG° were evaluated. The dye adsorption process was found to be endothermic for the two dyes. The maximum adsorption capacity Qo was 95.4mg/g for MB and 78.9mg/g for CV at an optimum pH. Adsorption kinetic was verified by pseudo-first-order and pseudo-second-order models. The results indicated that the dye uptake process followed the pseudo second-order and saturation type rate expressions for each dye. © 2011 Elsevier B.V. Source

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