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61.
Using the mean field Poisson–Boltzmann (PB) and the Ornstein–Zernike (OZ) integral equation theories, we have determined the macroions effective interactions and the structure of charged stabilized colloidal suspension for a large charge range of macroion and screening parameter values. The renormalized parameters are calculated by solving the PB equation written in the framework of the modified Jellium model. The structures have been determined by solving the OZ equation coupled with a self-consistent integral equation, which is related to the Verlet’s modified closure. Our results of the effective parameters are in good agreement with the experimental data, also the structure presents acceptable improvement compared to the Monte Carlo simulation data, against the HNC structure results, PACS: 61.20 Gy, 82.70 Dd, and 82.70 Kj. 相似文献
62.
63.
Fatima Mzyène Saâd Moulay Kheireddine Bal Fatiha Madi 《Journal of inclusion phenomena and macrocyclic chemistry》2018,92(3-4):381-394
Hydroxyapatite (HAp) and hydroxyapatite/chitosan/β-cyclodextrin (HAp/CS/β-CD) nanoparticles were successfully prepared in the modified simulated body fluid (SBF) solution at the physiological conditions (pH 7.4, temperature?=?37 °C). CS/β-CD nanoparticles acted as templates for the synthesis of HAp/CS/β-CD nanoparticles to improve the nanoarchitecture of HAp and its crystallinity.The nanoparticles were characterized by FT-IR spectroscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD). Kneading and coprecipitation methods were applied to prepare the inclusion complex involving β-CD and p-THPP (5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin), a photosensitizer for anti-cancer drugs. The 1:1 stoichiometric ratio of the formed inclusion complex was characterized by a formation constant of 7.216?×?102 mol?1 dm3 and analyzed by 1H NMR, FTIR, and UV–Vis. The p-THPP delivery release in vitro was in this order: HAp/CS/β-CD?<?CS/β-CD?<?<?HAp/β-CD?<?β-CD, hinting at a better controlled release by HAp/CS/β-CD nanoparticles. 相似文献
64.
Roger Arnaud Pierre-Yves Chavant Fatiha Hagoug Nadia Pelloux-leon Jean-Louis Ripoll Yannick Vallee 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4):319-320
Abstract i) When generated under FVT conditions α-imino-thioaldehydes undergo a cyclization to dihydro-1,3-thiazoles. ii) Thienium cations, generated during a Pummerer reaction, can be trapped with dienes. 相似文献
65.
We consider the sieve estimator of the operator of a Banach autoregressive process. We show the almost sure convergence when the operator is 2-summing, strictly 2-integral, afterwards 2-nuclear for the adequate norms. To cite this article: F. Rachedi, T. Mourid, C. R. Acad. Sci. Paris, Ser. I 336 (2003). 相似文献
66.
Fatiha Sahraoui 《Journal of Geometric Analysis》2006,16(1):167-185
According to S. Bochner [6, 7]: IfD =B +iℝ
n
is a tube domain in ℂ
n
, where B is a domain in ℝ
n
, and if
[(B)\tilde]\tilde B
is the convex envelope of B, then any holomorphic function on D extends to the tube domain
[(D)\tilde] = [(B)\tilde] + i\mathbbRn \tilde D = \tilde B + i\mathbb{R}^n
, which is a univalent envelope of holomorphy of D. We give a generalization of this result to (nonunivalent) tube domains
over a complex Lie group which admit a closed sub-group as a real form. Application: If (V, φ) is a tube domain over ℂ
n
and if B is the convex envelope of ϕ(V)∩ℝ
n
in ℝ
n
, then
[(V)\tilde] = B + i\mathbbRn \tilde V = B + i\mathbb{R}^n
is an envelope of holomorphy of (V, φ). 相似文献
67.
Fatiha Alabau-Boussouira 《Applied Mathematics and Optimization》2005,51(1):61-105
This work is concerned with the stabilization of hyperbolic systems by a nonlinear
feedback which can be localized on a part of the boundary or locally distributed. We show that general weighted integral inequalities together with
convexity arguments allow us to produce
a general semi-explicit formula which leads to decay rates of the energy in terms of the behavior of the nonlinear
feedback close to the origin.
This formula allows us to unify
for instance the cases where the feedback has a polynomial growth at the origin, with the cases
where it goes exponentially fast to zero at the origin. We also give three other significant examples
of nonpolynomial growth at the origin. Our work completes the work
of [15] and improves the results of
[21] and [22]
(see also [23]
and [10]). We also prove the optimality of our results for the one-dimensional wave equation
with nonlinear boundary dissipation. The key property for obtaining our general energy
decay formula is the understanding between convexity properties of an explicit function
connected to the feedback and the dissipation of energy. 相似文献
68.
We study the statistical prediction of a continuous time stochastic process admitting a functional autoregressive representation.
We construct an approximation of Parzen's optimal predictor in reproducing kernel spaces framework. This approach did not
require an estimation of the operator of the autoregressive representation.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
69.
Fatiha Alabau 《Transactions of the American Mathematical Society》1998,350(12):4709-4756
We give a constructive method for giving examples of doping functions and geometry of the device for which the nonelectroneutral voltage driven equations have multiple solutions. We show in particular, by performing a singular perturbation analysis of the current driven equations that if the electroneutral voltage driven equations have multiple solutions then the nonelectroneutral voltage driven equations have multiple solutions for sufficiently small normed Debye length. We then give a constructive method for giving examples of data for which the electroneutral voltage driven equations have multiple solutions.
70.
Madi Fatiha Largate Leila Nouar Leila Khatmi Djamel Eddine 《Journal of inclusion phenomena and macrocyclic chemistry》2013,76(3-4):379-384
Two models namely A and B were considered to investigate the inclusion process of ethylparaben into β-CD cavity by means PM3, HF/6-31G (d) and B3LYP/6-31G (d). The obtained results with PM3 method clearly indicate that the formed complexes are energetically favored with or without solvent; the B complex is found more favored than A complex. The calculated deformations energies show that the geometry of β-CD is deformed in the complexation process on the other hand the ethylparaben do not undergo deformation. Finally, From NBO analysis, the donor and acceptor interactions between ethylparaben and β-CD were analyzed and discussed. 相似文献