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Two Highly Variable Vpr<sub>84</sub>and Vpr<sub>85</sub>Residues within the HIV-1-Vpr C-Terminal Protein Transduction Domain Control Transductionnal Activity and Define a Clade Specific Polymorphism

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World Journal of AIDS 2014年第2期4卷 148-155页

作者： Jean-Herve Colle Thiery Rose Christine Rouzioux Alphonse Garcia eA 3620 Universite Paris Descartes AP-HP Laboratoire de Virologie Hopital Necker Paris France laboratoire e3 phosphatases Unite Signalisation Moleculaire et Activation Cellulaire Institut Pasteur Paris France Unite d’Immunogenetique Cellulaire Institut Pasteur Paris France Unite de Biologie des Populations Lymphocytaires Institut Pasteur Paris France

The virally encoded HIV-1 viral protein R (VPR) is a multifunctional factor that is required for induced HIV-1 pathogenesis. VPR is also a cell-penetrating protein found in biological fluids from HIV-1 infected individuals. In this regard, we previously published that the C-terminal VPR77-92 sequence from HIV-1 89.6, but not from pNL4.3 strain, is a new pro-apoptotic and protein transduction domain (PTD). Here we report on a sequence analysis of VPR77-92 domain using the Los Alamos HIV-1 sequence database. The analysis showed that the two residues of the domain VPR84 and VPR85 are highly variable and differently biased in HIV-1 clade B and HIV-1 clade C. Furthermore, when Jurkat lymphoblastoid cells or PBMC were incubated with chemically synthesized peptides containing distinct VPR77-92 C-terminal sequences from clades B or C, we found that a clade-dependent polymorphism in VPR84 and VPR85 residues controlled the transducing activity of the C-terminal HIV-1 VPR77-92 domain. Together our data indicate that clade-dependent polymorphism in the VPR84 and VPR85?residues defines the transducing properties mediated by the C-terminal domain of HIV-1 VPR. Identification of this VPR polymorphism suggests new approaches to understand the HIV-1 biology and/or pathogenesis.

关键词： VPR HIV-1 Subtypes Polymorphism Transduction

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Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5 M H_2SO_4

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Acta Metallurgica Sinica(english Letters) 2010年第1期23卷 13-20页

作者： e.el Ouariachi J.Paolini M.Bouklah A.elidrissi A.Bouyanzer B.Hammouti J-M.Desjobert J.Costa laboratoire de Chimie Appliqu'ee et environnement Facult'e des SciencesUniversit'e Mohamed PremierBP71760000 OujdaMorocco UMR CNRS 6134 Laboratoire de Chimie des Produits NaturelsUniversit'e de CorseFrance

Rosmarinus officinalis essential oil obtained by hydrodistillation was tested as corrosion inhibitor of steel in 0.5 M H2SO4 using weight loss measurements, and electrochemical .polarisation methods. Results obtained indicate that the corrosion rate is reduced and R. officinalis oil adsorbs on the metal surface and then inhibits corrosion process. Its inhibition efficiency increases with oil increasing content to reach 61% at 1 g/L. Polarisation curves indicate that RO acts as a cathodic inhibitor. The inhibition efficiency of naturally oil remains slightly constant with the rise of temperature. Chemical analysis of R. officinalis essential oil was carried out using capillary GC and GC/MS. The oil composition was characterized by high amount of oxygenated monoterpene （77%） with 1,8-cineol （52.1%） as main component. Discussion of adsorption was investigated on the the isotherm adsorption of essential oil on basis of essential oil composition. Finally the steel has been also reported.

关键词： Rosmarinus officinalis oil Adsorption Corrosion Inhibition Steel 1,8-cineol

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Small dissymmetry, yet large effects on the transport propertiesof electrolytes based on imide salts: Consequences on performancein Li-ion batteries

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Journal of energy Chemistry 2022年第2期31卷 352-366页

作者： Joseph Chidiac Laure Timperman Mérièm Anouti laboratoire PCM2e Universitéde ToursParc de Grandmont37200 ToursFrance

To gain better insight into the influence of the anion size and symmetry on the transport properties and thermal stability of an electrolyte based on lithium(fluorosulfonyl)(trifluoromethanesulfonyl)-imide(FTFSI)salt,we performed the physical and electrochemical characterization of an electrolyte based on FTFSI incorporated in standard binary(3 eC/7 eMC)and ternary(eC/PC/3 DMC)alkylcarbonate *** applying the Jones-Dole-Kaminsky(JDK),eyring and Arrhenius empirical models to the electrolyte viscosity we show that the activation enthalpy and entropy energy barriers(ΔH≠,ΔS≠)for viscous flow are between 12 and 15 kJ·mol^(-1).They are strongly dependent on the solvent nature and are significantly lower than their symmetric anions LiFSI and LiTFSI(19-20 kJ·mol^(-1))in the binary ***,the hydrodynamic radius,rs,calculated by JDK,and the ionicity behavior illustrated by the Walden role,showed that the FTFSI anion is outside the solvation sphere(rs>0.6 nm)which is smaller in the case of an eC/eMC solvent *** the 3 eC/7 eMC solvent mixture,LiFTFSI is less conductive than in the ternary mixture i.e.,σ_(max)=8.9 mS cm^(-1) at C_(max)=1.1 mol L^(-1) for 3 eC/7 eMC and,σ_(max)=10.5 mS cm^(-1) at max=0.7 mol L^(-1) for eC/PC/3 DMC,due to a strong solvation and a greater association of FTFSI ions in the binary solvent *** thermal stability of FTFSI based electrolytes was determined by the shift of the evaporation temperature of the volatile solvents(DMC,eMC)in the presence of salt,towards the higher *** feature is visible on the thermograms obtained by DSC both with the liquid electrolyte and with charged LMO cathodes in presence of *** consequences of these properties on the electrochemical behavior of a graphite(Gr)half-cell,a lithium metal(Li)anode and a manganese lithium oxide(LMO)cathode demonstrated on the one hand the formation of a thick solid electrolyte interphase(SeI)on graphite that consumed a significant amou

关键词： LiFTFSI electrolyte Viscosity Interface Li-ion battery

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Numerical studies towards practical large-eddy simulation

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Journal of Thermal Science 2007年第4期16卷 328-336页

作者： J.Boudet J.Caro L.Shao e.Lév(?)que LMFA laboratoire

Large-eddy simulation developments and validations are presented for an improved simulation of turbulent internal flows. Numerical methods are proposed according to two competing criteria： numerical qualities （precision and spectral characteristics）, and adaptability to complex configurations. First, methods are tested on academic test-cases, in order to abridge with fundamental studies. Consistent results are obtained using adaptable finite volume method, with higher order advection fluxes, implicit grid filtering and ＂low-cost＂ shear-improved Smagorinsky model. This analysis particularly focuses on mean flow, fluctuations, two-point correlations and spectra. Moreover, it is shown that exponential averaging is a promising tool for LeS implementation in complex geometry with deterministic unsteadiness. Finally, adaptability of the method is demonstrated by application to a configuration representative of blade-tip clearance flow in a turbomachine.

关键词： LeS adaptable methods validation

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Influence of Auxiliary equation on Wave Functions for Time-Dependent Pauli equation in Presence of Aharonov-Bohm effect

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Communications in Theoretical Physics 2009年第5期51卷 803-810页

作者： M.Maamache C.Lahoulou Y.Saadi laboratoire

Invariant operator method for discrete or continuous spectrum eigenvalue and unitary transformation approach are employed to study the two-dimensional time-dependent Pauli equation in presence of the Aharonov-Bohm effect （AB） and external scalar potential. For the spin particles the problem with the magnetic field is that it introduces a singularity into wave equation at the origin. A physical motivation is to replace the zero radius flux tube by one of radius R, with the additional condition that the magnetic field be confined to the surface of the tube, and then taking the limit R → 0 at the end of the computations. We point that the invariant operator must contain the step function θ（r - R）. Consequently, the problem becomes more complicated. In order to avoid this dimculty, we replace the radius R by ρ（t）R, where ρ（t） is a positive time-dependent function. Then at the end of calculations we take the limit R →0. The qualitative properties for the invariant operator spectrum are described separately for the different values of the parameter C appearing in the nonlinear auxiliary equation satisfied by p（t）, i.e., C 〉 0, C = 0, and C 〈0. Following the C＇s values the spectrum of quantum states is discrete （C 〉 0） or continuous （C ≤ 0）.

关键词： time-dependent systems invariant theory Aharonov-Bohm effect Pauli equation

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OPTIMIZATION APPROACH FOR THe MONGe-AMPèRe eQUATION

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Acta Mathematica Scientia 2018年第4期38卷 1285-1295页

作者： Fethi BeN BeLGACeM Department of Mathematics Laboratoire EDP ( LRO3ESO4) Faculty of Sciences of Tunis 1060 Tunis Tunisia

In this paper, we introduce and study a method for the numerical solution of the elliptic Monge-Ampere equation with Dirichlet boundary conditions. We formulate the Monge-Ampere equation as an optimization problem. The latter involves a Poisson Problem which is solved by the finite element Galerkin method and the minimum is computed by the conjugate gradient algorithm. We also present some numerical experiments.

关键词： elliptic Monge-Ampere equation gradient conjugate method finite element Galerkin method

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Wellposedness of some quasi-linear Schrdinger equations

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Science China Mathematics 2015年第5期58卷 891-914页

作者： CHeMIN Jean-Yves SALORT Delphine laboratoire J.-L. Lions UMR 7598 Universit'e Pierre et Marie Curie laboratoire de Biologie Computationnelle et Quantitative UMR 7238Sorbonne Universit'es L'Institut Jacques Monod UMR 7592 Universit'e Paris Diderot

This article is devoted to the study of a quasilinear Schrodinger equation coupled with an elliptic equation on the metric g. We first prove that, in this context, the propagation of regularity holds which ensures local wellposedness for initial data small enough in H1/2 and belonging to the Besov space B3/2 2,1. In a second step, we establish Strichartz estimates for time dependent rough metrics to obtain a lower bound of the time existence which only involves the B1＋ε 2,∞ norm on the initial data.

关键词： quasilinear Schrodinger equation Strichartz estimates paradiffential calculus stationary phase method

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A Simplified Numerical Study of the Kr/Cl_2 Plasma Chemistry in Dielectric Barrier Discharge

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Plasma Science and Technology 2013年第4期15卷 343-349页

作者： N.LARBI DAHO BACHIR A.BeLASRI laboratoire de physique des plasmas mat'eriaux conducteurs et leurs applications LPPMCA Universit'e USTO'MBOran Algeria

In this paper, the generation of excimers and exciplexe radiation in mixtures of rare gas with halogen by homogeneous dielectric barrier discharge （DBD） is investigated. The typical characteristics of an excilamp based on KrCI＊ exciplexe molecules and the kinetic processes for the formation and the decay of this molecules in the Kr/Cl2 mixture are studied. The computer model developed is based on the Kr/Cl2 mixture chemistry, the equivalent electric circuit and the Boltzmann equations. The importance in the kinetic processes of some species such as the metastable state of Krypton （Kr＊（3P0,2）） and the negative ion of chloride （C1-） is considered. The results illustrate the time variations of charged species （ne, Kr＋, CI-, Cl＋, Cl＋, Kr＋）, excited atoms and molecules （Kr＊（3p0,2）, Kr＊（3P1）, Cl＊, Cl2）, the excimers （Kr, KrCl＊（B）, KrCI＊（C）, Kr2Cl＊） and the UV photon concentrations （in 222 nm, 235 nm, 258 nm and 325 nm range）. The effects of chlorine concentration and the total gas pressure in the Kr-Cl2 discharge on the electric parameters and radiation emissions are investigated.

关键词： rare gas kinetic homogenous discharge dielectric barrier discharge KrCl*excilamp

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enhanced dielectric performance of Dy-substituted YMn2O5 for high-frequency applications

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Progress in Natural Science:Materials International 2021年第5期31卷 762-771页

作者： H.Chouaibi K.Khirouni e.Dhahri laboratoire de Physique Appliquée Faculté des Sciences Université de Sfax laboratoire de Physique des Matériaux et des Nanomatériaux Appliquée à l'environnement Faculté des Sciences de Gabès Cité Erriadh Université de Gabès

The dielectric performances as well as the effects of Dy3+ions content at A sites of YMn2O5（YMO） [x=0（YDM0）and x=0.4(YDM0.4)] polycrystalline samples were *** compounds were synthesized via sol-gel method.X-Ray diffraction and Raman measurements proved the high quality of the compounds that crystallized in an orthorhombic structure with the Pbam space ***,impedance spectroscopy and electrical modulus studies revealed that both samples exhibited a non-Debye's type of *** decrease of impedance for YDM0.4compared to the pure YDM0,may be attributed to the decrease in charge transfer *** the fit of impedance spectra,they confirmed that both compounds were simultaneously capacitive and ***,the activation energies obtained from Modulus and complex impedance were proven to be neighboring,suggesting that the relaxation process refers to electron *** each compound,the evolution of ε'and tan & with temperature indicated a clearer relaxor behavior,namely the existence of two *** first one detected at low temperature is related to the charge carriers hopping between Mn3+and Mn4+and the second at high temperature is associated with oxygen *** reduced hopping rate with Dy3+substitution for Y3+ions at A sites is responsible for the decrease in dielectric constant and dielectric *** significant findings demonstrate that these materials can be invested in a fruitful use in UV photo-detector and power applications in high frequency as microwave,millimeter wave signal processing,for civilian,military and space applications.

关键词： Multiferroic Relaxation phenomenon High dielectric constant Relaxor behavior

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On the hydro-mechanical behaviour of MX80 bentonite-based materials

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Journal of Rock Mechanics and Geotechnical engineering 2017年第3期9卷 183-192页

作者： Yu-Jun Cui ecole des Ponts ParisTech Laboratoire Navier/CERMES 6e8 av. Blaise Pascal Cité Descartes Champs e sur e Marne 77455 Marne-la=Valléecedex 2France

Bentonite-based materials have been considered in many countries as engineered barrier/backfilling materials in deep geological disposal of high-level radioactive *** the long period of waste storage,these materials will play an essential role in ensuring the integrity of the storage system that consists of the waste canisters,the engineered barrier/backfill,the retaining structures as well as the geological ***,it is essential to well understand the hydro-mechanical behaviours of these bentonite-based *** review paper presents the recent advances of knowledge on MX80 bentonite-based materials,in terms of water retention properties,hydraulic behaviour and mechanical *** is put on the effect of technological voids and the role of the dry density of *** swelling anisotropy is also discussed based on the results from swelling tests with measurements of both axial and radial swelling pressures on a sand-bentonite mixture compacted at different *** observation was used to help the interpretation of macroscopic hydromechanical ***,the evolution of soil microstructure thus the soil density over time is discussed based on the results from mock-up *** evolution is essential for understanding the longterm hydro-mechanical behaviour of the engineered barrier/backfill.

关键词： Bentonite-based materials Water retention Hydraulic conductivity Mechanical behaviour Microstructure Dry density evolution

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