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排序方式: 共有95条查询结果,搜索用时 31 毫秒
71.
Arabi Malika Elias Abdelhamid Kamel Ziane Ait younes Yasmine Mansouri Belkacem Toumert Idir 《Journal of Radioanalytical and Nuclear Chemistry》2018,317(2):1095-1106
Journal of Radioanalytical and Nuclear Chemistry - Gamma irradiation was applied to olive mill wastewater and synthetic samples prepared from Gallic acid. The effects, generated on the... 相似文献
72.
Mastinu PF Belkacem M D'Agostino M Bruno M Milazzo PM Vannini G Bowman DR Colonna N Dinius JD Ferrero A Fiandri ML Gelbke CK Glasmacher T Gramegna F Handzy DO Horn D Hsi WC Huang M Iori I Kunde GJ Lisa MA Lynch WG Margagliotti GV Montoya CP Moroni A Peaslee GF Petruzzelli F Rui R Schwarz C Tsang MB Williams C Latora V Bonasera A 《Physical review letters》1996,76(15):2646-2649
73.
Nonlinear Dynamics - The development of a two-loops Quadrotor’s robust generalized dynamic inversion (RGDI)-based control system is presented. The outer (position) loop utilizes PD position... 相似文献
74.
Acta Mathematica Sinica, English Series - In this paper, we consider an abstract third-order differential equation and deduce some results on the maximal regularity of its strict solution. We... 相似文献
75.
Naïma Belhaneche-Bensemra Belkacem Belaabed Abdelmalik Bedda 《Macromolecular Symposia》2002,180(1):203-216
The aim of this paper is to study the miscibility and the thermal degradation of PVC/PMMA blends. For that purpose, blends of variable compositions from 0 to 100 wt% were prepared with and without plasticizer. Their physico-chemical characterization was carried out by differential scanning calorimetric analysis (DSC) and Fourier transform infrared spectroscopy (FTIR). Their thermal degradation under nitrogen at 185°C was studied and the HCl evolved from PVC was measured by the pH method. Degraded samples were characterized, after purification, by FTIR and UV-visible spectroscopy. The DSC analysis showed polymer miscibility up to 60 wt% of PMMA. This miscibility is due to a specific interaction of hydrogen bonding type between carbonyl groups (C=O) of PMMA and hydrogen from (CHCl) groups of PVC as evidenced by FTIR analysis. On the other hand, it was found that PMMA exerted a stabilizing effect on the thermal degradation of PVC by reducing the zip dehydrochlorination and by leading to the formation of short polyenes. 相似文献
76.
Stereoretentive Copper‐Catalyzed Directed Thioglycosylation of C(sp2)−H Bonds of Benzamides
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Amélie Chabrier Dr. Alexandre Bruneau Sara Benmahdjoub Dr. Belkacem Benmerad Dr. Sabrina Belaid Jean‐Daniel Brion Dr. Mouâd Alami Dr. Samir Messaoudi 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(42):15006-15010
An efficient thioglycosylation of C(sp2)?H bonds with thiosugars has been established for the first time. Using only Cu(OAc)2?H2O as a catalyst and Ag2CO3 as an additive in DMSO, the protocol proved to have broad scope, and a variety of complex thioglycosides have been prepared in good yields with exclusive β‐selectivity. 相似文献
77.
A composite material of polybithiophene (PBTh) and β-MnO2 was prepared by electrodeposition of organic conducting polymer on β-MnO2 surface in 0.1 M LiClO4/0.01 M BTh/CH3CN. Synthesized material was characterized by using various techniques, i.e., X-ray diffractometry (XRD), scanning electron
microscopy (SEM), and magnetic measurements (SQUID). Electrochemical features of oxygen reduction reaction were investigated
using cyclic voltammetry on β-MnO2 and PBTh/β-MnO2 electrode, and chronopotentiometry tests were carried out at different currents. The results show that peak current and potential
of oxygen reduction are changed for β-MnO2 modified by polybithiophene. 相似文献
78.
The aim of this work is to show that the output from a double-output laser cavity exhibits distinctive features, manifesting themselves through typical asymmetry in the corresponding spectral-line shapes. Such asymmetry in an inhomogeneously broadened gas laser usually appears with a clear, but unpredictable shift of the maximum intensity level either towards the high or low frequency sides with respect to line centre. In the case of a double-output laser, the spectral profiles show opposite shifts. This means that when the maximum intensity of one output moves towards the high frequency side of the profile, the maximum intensity of the other moves towards the low frequency side. This gives rise to a frequency shift with respect to the Lamb-dip for a classical laser. On the theoretical side, we apply the standard disturbed Gaussian beam model to provide a quantification of the frequency shifts obtained at both sides of the system. 相似文献
79.
80.
Tao H Allison TK Wright TW Stooke AM Khurmi C van Tilborg J Liu Y Falcone RW Belkacem A Martinez TJ 《The Journal of chemical physics》2011,134(24):244306
Using a combined theoretical and experimental approach, we investigate the non-adiabatic dynamics of the prototypical ethylene (C(2)H(4)) molecule upon π → π? excitation. In this first part of a two part series, we focus on the lifetime of the excited electronic state. The femtosecond time-resolved photoelectron spectrum (TRPES) of ethylene is simulated based on our recent molecular dynamics simulation using the ab initio multiple spawning method with multi-state second order perturbation theory [H. Tao, B. G. Levine, and T. J. Martinez, J. Phys. Chem. A 113, 13656 (2009)]. We find excellent agreement between the TRPES calculation and the photoion signal observed in a pump-probe experiment using femtosecond vacuum ultraviolet (hν = 7.7 eV) pulses for both pump and probe. These results explain the apparent discrepancy over the excited state lifetime between theory and experiment that has existed for ten years, with experiments [e.g., P. Farmanara, V. Stert, and W. Radloff, Chem. Phys. Lett. 288, 518 (1998) and K. Kosma, S. A. Trushin, W. Fuss, and W. E. Schmid, J. Phys. Chem. A 112, 7514 (2008)] reporting much shorter lifetimes than predicted by theory. Investigation of the TRPES indicates that the fast decay of the photoion yield originates from both energetic and electronic factors, with the energetic factor playing a larger role in shaping the signal. 相似文献