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S. E. H. Etaiw M. M. El-Bendary H. Abdelazim 《Russian Journal of Coordination Chemistry》2017,43(5):320-330
The coordination polymers (CPs) {[Cd(Pydc)(H2O)3] · PydcH2} (I) and [Mn(Pydc)(H2O)3] · PydcH2} (II) were obtained by the reaction of CdSO4 · 5H2O or MnCl2 · 4H2O with pyridine-2,6-dicarboxylic acid (PydcH2). The structures of the CPs I and II were characterized by IR, UV-Vis, TGA, and X-ray single crystal analysis (CIF files CCDC nos. 1417757 (I), 1417758 (II)). The network structures of I and II are constructed by an infinite number of discrete binuclear molecules and free PydcH2. The structures of the CPs I and II connected by the extensive H-bonds and π–π stacking, forming a 3D-network. The CPs I and II were screened to test their antimicrobial activities against different species of bacteria and fungi. 相似文献
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M. S. Abdelazim 《Journal of statistical physics》1987,46(3-4):635-658
A simple approach is developed to calculate shock compression of simple molecules. This approach is based upon an accurate analytic representation of the Lennard-Jones fluids in conjunction with the Enskog theory, which is used to calculate the molecular diameter as a function of temperature along the Hugoniot. The model permits rapid, yet reliable calculations. It is applied to N2, O2, H2, D2, CH4, CO, and CO2. The results are tested by the comparison with experimental data and with other calculations. The computed Hugoniots agree reasonably with experimental results for many (but not all) simple molecules and are comparable to those of more complicated models. 相似文献
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El-Shafey Aya El Din Reham Shams Abdelazim Sarah H. Mamdouh Nahla salah Dina El-Dek S. I. Zaki A. H. 《Journal of Sol-Gel Science and Technology》2021,99(2):326-338
Journal of Sol-Gel Science and Technology - ZnO nanoparticles with different morphologies were prepared via the biotemplate method. The microstructure of synthesized nanoparticles was found to... 相似文献
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Adel Abdelrazek Abdelazim Mohdaly Mohamed H. H. Roby Seham Ahmed Rabea Sultan Eberhard Groß Iryna Smetanska 《Molecules (Basel, Switzerland)》2022,27(21)
Acrylamide is classified as a toxic and a prospective carcinogen to humans, and it is formed during thermal process via Maillard reaction. In order to find innovative ways to diminish acrylamide formation in potato chips, several extracts of agricultural wastes including potato peels, olive leaves, lemon peels and pomegranate peels extracts were examined as a soaking pre-treatment before frying step. Total phenolic, total flavonoids, antioxidant activity, and the reduction in sugar and asparagine contents were additionally performed. Proximate composition of these wastes was found to be markedly higher in fat, carbohydrate and ash contents. Lemon peels and potato peels showed almost similar phenolic content (162 ± 0.93 and 157 ± 0.88 mg GAE /g, respectively) and exhibited strong ABTS and DPPH radical scavenging activities than the other wastes. The reduction percentage of reducing sugars and asparagine after soaking treatment ranged from 28.70 to 39.57% and from 22.71 to 29.55%, respectively. HPLC results showed higher level of acrylamide formation in control sample (104.94 mg/kg) and by using the wastes extracts of lemon peels, potato peels, olive leaves, and pomegranate peels succeeded to mitigate acrylamide level by 86.11%, 69.66%, 34.03%, and 11.08%, respectively. Thus, it can be concluded that the soaking of potato slices in the tested wastes extracts as antioxidant as pre-treatment before frying reduces the formation of acrylamide and in this way, the risks connected to acrylamide consumption could be regulated and managed. 相似文献
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Afaque Ahmed Ismail Mohd Saaid Rashidah M Pilus Abdelazim Abbas Ahmed Abdul Haque Tunio Mirza Khurram Baig 《Journal of Dispersion Science and Technology》2018,39(10):1469-1475
The present study examines and compares the effect of surface treatments of nano-silica using internal olefins sulphonates (IOS20–24 and IOS19–23), anionic surfactants. The effect of surface modification on colloidal stability, wettability alteration and oil-water interfacial tension reduction were analyzed. Silica nanoparticles were characterized using Field Emission Scanning Electron Microscope (FESEM) and integrated energy-dispersive X-ray spectroscopy (EDX) before and after surface treatment. Using Turbiscan classic, the optimal nanosilica concentration and inspection of the coated particles dispersion stability with the help of light transmission behavior through the nanofluid was carried out. The stability was found to be enhanced as the mean light transmission declined only after surfactant treatment in both IOS coated nano-silicas but IOS19–23 O-342 coated dispersions proved to be more stable among all three. RAME-HART Goniometer was used to perform interfacial tension (IFT) and contact angle measurements. IFT was found to be reduced by 48% after the surfactant treatment in case of IOS19–23 O-342 coated nanosilica. Both surface treatments of nanosilica and increasing silica concentration caused significant reduction and altering wettability towards more water wet. The results revealed that IOS coatings improved the efficiency of NPs dispersion in terms of altered wettability and reduced IFT that mimics their potential for EOR applications. 相似文献
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Mohamed W. Morsy Ali Rabie Abdelazim Hilal Hermann Hartmann 《Theoretical chemistry accounts》1974,35(1):1-15
The kinetic consequences of resonance tunnelling processes that may occur in chemical reactions are investigated in terms of a multi-centered unsymmetrical Eckart potential barrier. This potential function does not only simulate the possible existence of intermediate wells in the effective potential energy cut along the reaction path, but also is amenable to analytic solutions. The reaction rate as well as its dependence on temperature, reduced mass,Q-value, activation energy and barrier diffuseness are evaluated for successively increasing the number of barrier stages. Comparisons between results due to single and multi-humped potential energy barriers are made and discussed. 相似文献
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