排序方式: 共有13条查询结果,搜索用时 15 毫秒
1.
Saraya Roshdy E. Hassan Yasser F. Eltukhi Walid E. Salman Baher I. 《Journal of fluorescence》2022,32(5):1725-1732
Journal of Fluorescence - Vonoprazan (VON) has been approved recently via US-FDA in 2015 as the first in class of potassium competitive acid blocker group. VON is used for management of... 相似文献
2.
Journal of Radioanalytical and Nuclear Chemistry - Amberjet 1200 H resin is an industrial strong acid cation exchanger bearing sulfonic reactive groups that were tested for the removal of uranium,... 相似文献
3.
M. H. Roshdy M. T. Haridi I. A. Ibrahim M. Sh. Yaacoub 《Journal of polymer science. Part A, Polymer chemistry》1984,22(8):1797-1801
The radiation degradation of viscoelastic solutions of a dialkyl monohydroxy aluminum polymer compound (AIR2OH)x is investigated. Radioactive cobalt-60 is chosen for irradiation experiments. The viscosity of the polymer in six different solvents is measured after irradiation using a capillary viscometer at room temperature (25°C). The degradation effects on both the radiation dose and the solvent used. 相似文献
4.
Xu M Larentzos JP Roshdy M Criscenti LJ Allen HC 《Physical chemistry chemical physics : PCCP》2008,10(32):4793-4801
Nitrate aqueous solutions, Mg(NO(3))(2), Ca(NO(3))(2), Sr(NO(3))(2), and Pb(NO(3))(2), are investigated using Raman spectroscopy and free energy profiles from molecular dynamics (MD) simulations. Analysis of the in-plane deformation, symmetric stretch, and asymmetric stretch vibrational modes of the nitrate ions reveal perturbation caused by the metal cations and hydrating water molecules. Results show that Pb(2+) has a strong tendency to form contact ion pairs with nitrate relative to Sr(2+), Ca(2+), and Mg(2+), and contact ion pair formation decreases with decreasing cation size and increasing cation charge density: Pb(2+) > Sr(2+) > Ca(2+) > Mg(2+). In the case of Mg(2+), the Mg(2+)-OH(2) intermolecular modes indicate strong hydration by water molecules and no contact ion pairing with nitrate. Free energy profiles provide evidence for the experimentally observed trend and clarification between solvent-separated, solvent-shared, and contact ion pairs, particularly for Mg(2+) relative to other cations. 相似文献
5.
JPC – Journal of Planar Chromatography – Modern TLC - A rapid, sensitive, and eco-friendly micellar high-performance thin-layer chromatography (HPTLC) technique for the simultaneous... 相似文献
6.
The problem of propagation of 10.6 m-CO2 laser pulses in fog has been formulated and solved numerically, making use of Duhammel's principle. Fog droplets are considered Mie scatterers in the Rayleigh limit. Evaporation, power loss and time delay of pulse peak have been studied. Possible extensions of the technique have been discussed. 相似文献
7.
Journal of Applied Spectroscopy - Simple, rapid, and sensitive spectroscopic methods have been proposed to determine the antifungal drug mebendazole. These methods adapted the reduction of ferric... 相似文献
8.
Roshdy E. Saraya Sami El Deeb Baher I. Salman Adel Ehab Ibrahim 《Journal of separation science》2022,45(14):2582-2590
Favipiravir, molnupiravir, and ritonavir have been recently approved as the first oral antivirals for treatment of SARS-CoV-2 viral infections. Their combination was reported in several clinical studies, alternatively, to enhance the viral eradication and improve patient's recovery times and rates. Being all orally administered, therefore, the development of new sensitive and validated methodologies for their simultaneous determination is a necessitate. In the proposed research, a sensitive, selective, and simple high-performance thin layer chromatography method was developed and validated for determination of favipiravir, molnupiravir, and ritonavir. Silica gel 60F254 thin layer chromatography plates were used as stationary phase for this separation using mobile phase composed of methylene chloride:ethyl acetate:methanol:25% ammonia (6:3:4:1, v/v/v/v). Densitometric detection was performed at wavelength 289 nm. Peaks of favipiravir, molnupiravir, and ritonavir were resolved at retention factors 0.22, 0.42, and 0.63, respectively. The proposed method was found linear within the specified ranges of 3.75–100.00 μg/mL for molnupiravir and favipiravir, and 2.75–100.00 μg/mL for ritonavir. Limits of detection were found to be 1.12, 1.21, and 0.89 μg/mL for favipiravir, molnupiravir, and ritonavir, respectively. This is the first method to be reported for the simultaneous determination of the cited three antiviral drugs. The method was assessed on novel greenness metrics. 相似文献
9.
JPC – Journal of Planar Chromatography – Modern TLC - The therapeutic combination of ondansetron (OND) and pantoprazole (PAN) is widely prescribed for the treatment of many... 相似文献
10.
Mostafa M. Emara Roshdy A. Ali Amal S. Turky Mahmoud M. Elghayish 《Journal of Dispersion Science and Technology》2016,37(5):733-742
A series of Gemini borate surfactants were synthesized based on glucose molecule. Their chemical structures were confirmed using 1H-NMR,13C nuclear magnetic resonance (NMR), and mass spectroscopy. The surface activities of these Gemini amphiphiles were measured, including surface tension (γ), critical micelle concentration (CMC), effectiveness (IIcmc), efficiency (pC20), maximum surface excess (Γmax), and minimum surface area (Amin) at different temperatures 25, 35, and 45°C either in pure water or in water–ethanol mixture (10%). Also, thermodynamic data including free energy, entropy, and enthalpy changes (ΔS, TΔS, ΔH) for adsorption at the air–water interface and also for micellization in surfactant solutions were calculated. 相似文献