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101.
102.
103.
Said Salhi 《The Journal of the Operational Research Society》1991,42(12):1124-1125
104.
Frontispiece: NMR Spectroscopic Assignment of Backbone and Side‐Chain Protons in Fully Protonated Proteins: Microcrystals,Sedimented Assemblies,and Amyloid Fibrils
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Dr. Jan Stanek Dr. Loren B. Andreas Dr. Kristaps Jaudzems Dr. Diane Cala Dr. Daniela Lalli Andrea Bertarello Dr. Tobias Schubeis Dr. Inara Akopjana Dr. Svetlana Kotelovica Prof. Kaspars Tars Dr. Andrea Pica Dr. Serena Leone Prof. Delia Picone Dr. Zhi‐Qiang Xu Prof. Nicholas E. Dixon Dr. Denis Martinez Mélanie Berbon Nadia El Mammeri Dr. Abdelmajid Noubhani Dr. Sven Saupe Dr. Birgit Habenstein Dr. Antoine Loquet Dr. Guido Pintacuda 《Angewandte Chemie (International ed. in English)》2016,55(50)
105.
Christophe Len Abdelmajid Sélouane Asa WeilingFabien Coicou Denis Postel 《Tetrahedron letters》2003,44(4):663-666
Both enantiomers of 3-benzoyloxymethylisobenzofuranone have been obtained in good yield in six steps from phthalaldehyde using a d-xylose derivative as a chiral protecting group. The two chiral heterocycles are γ-hydroxymethyl-α,β-butenolide analogues having a benzene ring in positions 2 and 3. The key step was the dihydroxylation using both OsO4 and AD-mix developed by Sharpless. The asymmetric dihydroxylation using AD-mix required a double diastereoselectivity and gave excellent diastereoisomeric excess. 相似文献
106.
Bouabdallah I M'Barek LA Zyad A Ramdani A Zidane I Melhaoui A 《Natural product research》2007,21(4):298-302
The evaluation of the in vitro cytotoxic properties of two pyrazole compounds: 1-(4-nitrophényl)-3,5-diméthylpyrazole (1) and 1,1'-di(4-nitrophényl)-5,5'-diisopropyl-3,3'-bipyrazole (2) was investigated against Hep cell line (Human laryngeal carcinoma). These two compounds showed an important cytotoxic activity on the Hep cell line, with IC(50): 8.25 microg mL(-1) for the compound 1; IC(50): 10.20 microg mL(-1) for the compound 2 while the IC(50) for adriamycine used as positive control was 3.62 microg mL(-1). 相似文献
107.
The characterization of the thermal properties of polymers represents a fundamental step in improving materials for energy harvesting processes. Thermal conductivity, for example, is measured by measuring heat flux and temperature difference. This study seeks to design and fabricate an experimental set-up to measure the thermal conductivity of low-thickness polymers at room temperature. It is unique in that it is an affordable and lightweight instrument developed using electrical resistance as a heater and a limited number of components. Error analysis and reproducibility analysis were carried out for the thermal conductivity. The instrument was found to be reliable in making thermal conductivity measurements with an average of ±7%. 相似文献
108.
In this paper, an optimisation-based approach is developed for the determination of the cyclic steady-sate (CSS) of a pressure swing adsorption process (PSA). It consists in treating the simulation problem as a single dynamic optimisation problem where the performance index is the CSS condition, the decision variables are the state variables at the start of the cycle and the constraints are given by the process model equations with associated initial conditions. The resulting optimisation problem is solved using a gradient-based non linear programming (NLP) method, e.g. SQP method, where the gradients are computed by means of four different methods: finite differences, numerical and analytical sensitivities and adjoint system methods. 相似文献
109.
TGA and magnetization measurements for determination of composition and polymer conversion of magnetic hybrid particles
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Ernandes Taveira Tenório‐Neto Talha Jamshaid Mohamed Eissa Marcos Hiroiuqui Kunita Nadia Zine Géraldine Agusti Hatem Fessi Abdelhamid Errachid El‐Salhi Abdelhamid Elaissari 《先进技术聚合物》2015,26(10):1199-1208
Magnetic hybrid colloidal particles can be characterized using various techniques and numerous tools leading generally to particles size, size distribution, and electrokinetic properties. However, the chemical composition of these hybrid particles can be estimated using thermal gravimetric analysis (TGA). More interestingly, the combination of this quantitative technique with the magnetization measurement leads not only to chemical composition but also to the overall polymerization conversion and more precisely to the polymerization conversion on the seed particles. In fact, the TGA performed on dried magnetic particles leads to exact organic/inorganic chemical composition. Regarding the magnetization, the amount of magnetic material can be deduced, and consequently, the amount of non‐magnetic material can be also estimated. Thus, TGA and magnetization measurements are considered as complementary techniques for characterization of magnetic hybrid colloidal particles. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
110.
A. Salhi M. Omri 《The European Physical Journal B - Condensed Matter and Complex Systems》1999,8(3):463-475
An analysis based on the available experimental data and second-order closures is made for a turbulent shear flow over a rotating
cylinder in a quiescent fluid. The near-wall behaviour of the non-linear model for the pressure-strain correlation proposed
by Speziale, Sarkar and Gatski [J. Fluid Mech. 245, 227 (1991)] is enlarged; and the methodology proposed by Lai and So [J. Fluid Mech. 221, 641 (1990)] is adopted to take into account the wall-effects. The radial profile of the curvature parameter, Rs, is examined in connection with the logarithmic law. It is shown that the log-layer is associated to the region where the
mean velocity profile, V, is related to the power of the radial distance as Computations reveal that this region corresponds to the state with the most destabilizing curvature effects; which can be
chararacterized by the minimum value of the parameter B
c
=2R
s
(1+2R
s
), and not that one of the parameter B=2R
s
(1+2R
s
)/(1+R
s
)2 firstly introduced by Bradshaw [J. Fluid Mech. 36, 171 (1969)] and extensively used to characterize the turbulence structure in curved flows.
Received 9 December 1997 相似文献