Amran University

Amran, United States

Amran University

Amran, United States
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Doweidar H.,Mansoura University | El-Egili K.,Mansoura University | Ramadan R.,National Research Center of Egypt | Al-Zaibani M.,Mansoura University | Al-Zaibani M.,Amran University
Journal of Non-Crystalline Solids | Year: 2017

Glasses of the formula 50PbO·xTiO2·(50- x)B2O3·0.5CuO (0≤ x ≤30mol%) have been investigated by XRD, FTIR, SEM. Phase separation is observed in as-prepared glasses, but there are no crystalline species. Crystalline PbTiO3 and PbB2O7 phases are formed in 50PbO·30TiO2·20B2O3·0.5CuO glass samples after thermal treatment at 530°C for 8h. The IR spectra do not show peaks related to structural units of TiO2. The fraction of BO4 units decreases slightly with increasing TiO2 content. This change is assumed due to formation of TiO6 units at the expense of TiO4 units. Both the density and molar volume do not change with composition. Calculations based on the concentration and volume of the structural units indicate that the molar volume has mostly the same value between 0 and 30mol% TiO2. © 2017 Elsevier B.V.

Shahbunder H.,Ain Shams University | Shahbunder H.,University of the Humanities | Al Qaaod A.A.,Amran University | Amin E.A.,Nuclear and Radiation Regulatory Authority NRRA | El-Kameesy S.U.,Ain Shams University
Annals of Nuclear Energy | Year: 2016

Plutonium (Pu) and minor actinides (MAs) are responsible for the majority of radiotoxicity, heat generation, and proliferation risk of nuclear spent fuel. Accelerator driven system (ADS) reactors can employ Pu and MA for transmutation and power generation within improved safety scheme. Pu and MA can be loaded in ADS reactor core in a variety of distributions. In this study, the effects of uniform and nonuniform distributions of Pu and MA samples loaded within enriched uranium fuel elements inside UT-TRIGA Mark II ADS reactor on neutron flux, neutron spectrum, fission rate, and subcritical multiplication parameters were numerically investigated using Monte Carlo MCNPX transport code. The type of distribution producing higher subcritical multiplication and source efficiency will contribute in minimizing the accelerator current requirements for ADS operation. © 2016 Elsevier Ltd. All rights reserved.

Hezma A.M.,National Research Center of Egypt | Elashmawi I.S.,National Research Center of Egypt | Elashmawi I.S.,Taibah University | Rajeh A.,Amran University | And 2 more authors.
Der Pharma Chemica | Year: 2016

Nanocomposites based on (PU/PVC) polyurethane (PU) and poly (vinyl chloride) (PVC) loaded with low contents of multi walled carbon nanotubes (MWCNTs) were prepared using solution casting technique. The composition and structure of blend and nanocomposites were characterized by X-ray diffraction (XRD),Transmission electron microscope (TEM), and Differential scanning calorimetry (DSC). The X-ray study indicated that decrease crystallinity of polymer blend after addition of carbon nanotubes due to interaction between carbon nanotube (CNT) and the polymer matrix in the nanocomposites. Thermal stability was studied by Differential scanning calorimetry (DSC) analysis. The obtained data from these study described that the glass transition temperature (Tg), melting point (Tm) and degradation temperature (Td) of the samples were increased with an increase of different concentrations of MWCNTs. The behavior of thermal stability were enhanced. Mechanical properties were calculated by tensile universal testing machine. All results data showed well dispersed of MWCNTs in polymer matrix at all weight percentages.

Mlahi M.R.,Amran University | Azhari S.J.,University of Umm Al - Qura | El-Asmy A.A.,Mansoura University | Mostafa M.M.,Mansoura University
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2015

Five metal complexes derived the reactions of 4-allyl-1-(2-hydroxybenzoyl) thiosemicarbazide (L1) with MX2 (M = Co2+, Cu2+ and Zn2+ ions; X = Cl- in case of Co 2+ and Cu2+ ions and Cl- and Ac- in case of Zn2+ ion) in EtOH were synthesized and characterized. The results suggested that the binary and ternary complexes have the general formulae, [Cu(L1-2H)(EtOH)], [Co(L1-2H)(H 2O)2]H2O and [Zn(L1-2H) (H 2O)1/2]EtOH, [Cu2(dipy)(L1-2H)(OH) 2(H2O)], [Co(dipy)(L1-2H)]4H2O and [Zn(dipy)(L1-2H)]. The binary and ternary complexes were characterized by elemental analyses, molar conductivities, spectral (IR, UV-vis; 1H NMR, mass), thermal (TGA, DTG) and magnetic moments measurements. The mode of chelation is suggested using spectral data. The existence of OH group in the ternary complexes is confirmed from the results of IR, mass and 1H NMR spectra. All the geometries of the ligands and the complexes are confirmed using DFT method from DMOL3. The biological activity for the L1 and two metal complexes were tested against DNA. © 2014 Elsevier B.V. All rights reserved.

Doweidar H.,Mansoura University | El-Damrawi G.,Mansoura University | Al-Zaibani M.,Mansoura University | Al-Zaibani M.,Amran University
Vibrational Spectroscopy | Year: 2013

The article presents a simple method that can be used to get the concentration of various species in mixed-modifier borate glasses. By using the fraction of four coordinated boron in xCaO (30 - x)Na2O70B 2O3 (0 ≤ x ≤ 27.5 mol%) and xCaO(40 - x)Na 2O60B2O3 glasses (10 ≤ x ≤ 40 mol%), the concentration of BO4 - and asymmetric BO3 units related to each modifier oxide could be determined. CaO has a greater tendency to form asymmetric BO3 units in the first glass series, while Na 2O has the ability to form BO4 units to a greater extent. In xCaO(40 - x)Na2O60B2O3 glasses, BO 4 - and asymmetric BO3 units are formed at the same rate from Na2O and CaO. The fraction of four coordinated boron, can be predicted by treating the studied glasses as if they are mixtures of Na2O-B2O3 and CaO-B2O3 matrices. The change in N4 is due to change in the relative concentration of these matrices. © 2013 Published by Elsevier B.V.

Mlahi M.R.,Amran University | Negm A.,Mansoura University | Azhari S.J.,University of Umm Al - Qura | Mostafa M.M.,Mansoura University
Applied Organometallic Chemistry | Year: 2014

A new series of Cu2+, Pt4+, Pd2+, Au 3+ and Nd3+ complexes derived from 2-(pyridin-1-ium-1-yl) acetate have been synthesized and characterized using elemental analyses, spectral (infrared (IR), UV-visible, mass, 13C NMR and 1H NMR), magnetic and thermal measurements. IR results suggest that the ligand acts in a neutral monodentate fashion in all complexes. Octahedral geometry is proposed for Cu2+ and Pt4+ complexes and square-planar for Pd2+ and Au3+ complexes. The bond lengths, bond angles, and HOMO and LUMO were calculated. Superoxide dismutase-like radical scavenger activity and cytotoxic activity of the isolated complexes on HepG2 liver cancer cells have been screened. Ligand and complexes (Pt4+ and Nd 3+) exhibit potent antioxidant activity upon coordination while Cu2+ and Au3+ complexes do not show superoxide dismutase-like radical scavenger activity. The cytotoxic activity assay against HepG2 cell line proves that the ligand and its Pt4+ complex have a high cytotoxic activity, while the other complexes showed no cytotoxic activity. Copyright © 2014 John Wiley & Sons, Ltd.

Salama T.A.,Mansoura University | Salama T.A.,Amran University | Elmorsy S.S.,Mansoura University
Chinese Chemical Letters | Year: 2011

A combination of tetrachlorosilane (TCS) and phenol in dichloromethane was found to be an efficient reagent for hydrochlorination of α,β- unsaturated ketones to afford the corresponding β-chloroketones in good yield at ambient temperature. Reactions of the titled compounds with TCS-NaN 3 as well as with nitriles utilizing TCS-ZnCl 2 to give 1,5-disubstituted tetrazole derivatives or β-amido ketones respectively are also described. © 2011 Tarek A. Salama.

Omara H.A.,Amran University | Amin A.S.,University of Umm Al - Qura
Journal of Saudi Chemical Society | Year: 2012

A simple, accurate and highly sensitive spectrophotometric methods are proposed for the rapid and accurate determination of amantadine HCl (AMD) using bromocressol green (BCG), bromophenol blue (BPB) and bromothymol blue (BTB). The developed methods involve formation of stable yellow colored chloroform extractable ion-associate complexes of the amino derivative (basic nitrogen) of the AMD with three sulphonphthalein acid dyes, namely; BCG, BPB and BTB, in acidic medium. The ion-associates exhibit absorption maxima at 415, 412 and 414nm for BCG, BPB and BTB, respectively. AMD can be determined up to 1.5-16.5, 1.4-14.0 and 1.6-17μgmL -1, respectively. The effect of optimum conditions via acidity, reagent concentration, time, and solvent was studied. The stoichiometry of the reaction was found to be 1:1 in all cases. The low relative standard deviation values indicate good precision and high recovery values. These methods have been successfully applied for the assay of AMD in pharmaceutical formulations. Statistical comparison of the results with the reference method shows excellent agreement and indicates no significant difference in accuracy and precision. © 2010.

Omara H.A.,Amran University | Amin A.S.,University of Umm Al - Qura
Arabian Journal of Chemistry | Year: 2011

Two simple, rapid, sensitive, low-cost, and accurate methods (A and B) for the microdetermination of amantadine HCl (AMD) in pure form and in pharmaceutical formulations are developed. Method A is based on the formation of tris (o-phenanthroline)-iron(II) complex (ferroin) upon reaction of amantadine HCl with an iron (III)-o-phenanthroline mixture in sodium acetate-acetic acid buffer media. The ferroin complex is spectrophotometrically measured at λmax 509nm against reagent blank. Method B is based on the reduction of Fe (III) by the drug which forms colored complex (λmax 521nm) with 2,2'-bipyridyl. Optimizations of the experimental conditions are described. Beer's law is obeyed in the concentration ranges 0.4-10 and 0.6-22μgmL-1 using 1,10-phenanthroline and 2,2'-bipyridyl, respectively. The developed methods have been successfully applied for the determination of AMD in bulk drugs and in pharmaceutical formulations. The common excipients and additives did not interfere in their determinations. © 2010.

Salama T.A.,Amran University | Novak Z.,Eötvös Loránd University
Tetrahedron Letters | Year: 2011

Combinations of N-halosuccinimide and tetrachlorosilane in acetonitrile were found to be efficient systems for the selective α-monohalogenation of carbonyl compounds as well as for benzylic halogenation under mild conditions. © 2011 Elsevier Ltd. All rights reserved.

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