检索结果-南通市图书馆

Synthesis and purification of long copper nanowires. Application to high performance flexible transparent electrodes with and without PEDOT：PSS

在线全文

学校读者我要写书评

暂无评论

Nano Research 2014年第3期7卷 315-324页

作者： Celine Mayousse Caroline Celle Alexandre Carella jean-pierre Simonato CEA LITEN / DTNM / LCRE 17 rue des Martyrs 38054 Grenoble France

We demonstrate the hydrothermal synthesis of long copper nanowires based on a simple protocol. We show that the purification of the nanowires is very important and can be achieved easily by wet treatment with glacial acetic acid. Fabrication of random networks of purified copper nanowires leads to flexible transparent electrodes with excellent optoelectronic performances （e.g., 55 Ω/sq. at 94% transparency）. The process is carried out at room temperature and no post-treatment is necessary. Hybrid materials with the conductive polymer PEDOT：PSS show similar properties （e.g., 46 Ω/sq, at 93% transparency）, with improved mechanical properties. Both electrodes were integrated in capacitive touch sensors.

关键词： copper nanowires transparent electrodes PEDOT:PSS touch sensor metallic nanowires

Hydraulic and mechanical properties of wax-coated sands

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Central South University 2013年第12期20卷 3667-3675页

作者： Jesmani Mehrab Bardet jean-pierre Jabbari Nima Kamalzare Mehrad Department of Civil Engineering Imam Khomeini International University Sonny Astani Department of Civil and Environmental Engineering Viterbi School of Engineering Department of Civil and Environmental Engineering Rensselaer Polytechnic Institute

Wax-coated sands are a new category of synthetic soils, which are gradually becoming a reliable construction material. Because of their valuable drainage ability and mechanical properties, wax coated sandy soils are specifically applicable to pavement construction of horseracing tracks and sport fields. Although the mechanical and hydraulic properties of these synthetic soils are well-proven, there is still a lack of studies on how the soil samples behave differently when mixing with different wax fractions. Adding the wax affects permeability and compressibility of pure sand. Intensity of influences is a function of weight percentage of wax that has been added, and other physical and environmental factors. The effects of wax content on hydraulic properties(permeability), and mechanical properties(stress strain behavior, compressibility) of sandy soils based on a series of experimental efforts were investigated. Obtained experimental results infer that increasing the amount of wax up to 6% causes an about 50% increase in permeability, mainly because of the significant effect of wax in lowering the friction along with covering and filling the angular parts of particles' surfaces and forming rounded particles. In addition, wax-coated sands show a 20% to 60% decrease in confined compression modulus compared to non wax-coated sands.

关键词： wax-coated sand confined compression coefficient permeability compressibility stress-strain behavior

Orexin/hypocretinin in multiple sclerosis and experimental autoimmune encephalomyelitis

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2020年第6期15卷 1039-1040页

作者： jean pierre Pallais Catherine M.Kotz Milos Stanojlovic Integrative Biology and Physiology University of MinnesotaMinneapolisMNUSA(Pallais JPKotz CMStanojlovic M)Minneapolis VA Health Care SystemGeriatric ResearchEducation and Clinical CenterMinneapolisMNUSA(Kotz CM)

Multiple sclerosis(MS)is a T-cell-mediated autoimmune disease of the central nervous system(CNS).Worldwide,more than 2.3 million people are diagnosed with *** its clinical manifestations appear typically in the third and fourth decades of life,MS is a major cause of neurological disability in young adults and has wide health,psychological,economic,and social *** are three key pathological features of MS:inflammation;demyelination and oligodendrocyte loss;axonal loss and *** are two main hypotheses regarding mechanisms of MS ***“outside-in”concept is an older,widely recognized hypothesis that describes neurodegeneration as a consequence of inflammatory induced demyelination,which is caused by immune system activation(lassmann et al.,2012).Mechanisms of T-cell mediated myelin destruction are extensively studied,but the manner by which the immune system perceives myelin as foreign.

关键词： autoimmune sclerosis inflammation

A 3D Numerical Study of lO_2/GH_2 Supercritical Combustion in the ONERA-Mascotte Test-rig Configuration

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2016年第1期25卷 97-108页

作者： Abdelkrim Benmansour Abdelkrim liazid pierre-Olivier logerais jean-Félix Durastanti laboratory lTE ENP-OranBP 1523 El Mnaouer 31000Oran Algeria Universite de Paris-Est CERTESIUT de Senartrue Georges Charpak77567 LieusaintFrance

Cryogenic propellants lOx/H2 are used at very high pressure in rocket engine combustion. The description of the combustion process in such application is very complex due essentially to the supercritical regime. Ideal gas law becomes invalid. In order to try to capture the average characteristics of this combustion process, numerical computations are performed using a model based on a one-phase multi-component approach. Such work requires fluid properties and a correct definition of the mixture behavior generally described by cubic equations of state with appropriated thermodynamic relations validated against the NIST data. In this study we consider an alternative way to get the effect of real gas by testing the volume-weighted-mixing-law with association of the component transport properties using directly the NIST library data fitting including the supercritical regime range. The numerical simulations are carried out using 3D RANS approach associated with two tested turbulence models, the standard k-Epsilon model and the realizable k-Epsilon one. The combustion model is also associated with two chemical reaction mechanisms. The first one is a one-step generic chemical reaction and the second one is a two-step chemical reaction. The obtained results like temperature profiles, recirculation zones, visible flame lengths and distributions of OH species are discussed.

关键词： Rocket engine non-premixed combustion supercritical regime H2-O2 flame transport properties

Flocculation and magnetically-assisted sedimentation of size-sorted beidellite platelets mixed with maghemite nanoparticles

在线全文

学校读者我要写书评

暂无评论

Nano Research 2020年第11期13卷 3001-3011页

作者： Sofia Housni Sébastien Abramson jean-Michel Guigner pierre levitz laurent Michot laboratoire de PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX(PHENIX UMR 8234 Sorbonne Université-CNRS)Sorbonne UniversitéParis75252France Institut de Minéralogie de Physique des Matériaux et de Cosmochimie(IMPMC UMR 7590Sorbonne Université-IRD-CNRS-MNHN)Sorbonne UniversitéParis75252France

In this study,the flocculation and the subsequent decantation step of mixed suspensions of 10 nm-sizedγ-Fe_(2)O_(3) magnetic nanoparticles and 500 nm-sized beidellite clay platelets was *** work may find application in the field of water treatment,specifically the flocculation processes with magnetically assisted *** a short description of the preparation and characterization of the raw materials(nanoparticles and clays),the influence of several parameters(pH,concentrations of nanoparticles and clays etc.)on the amount of flocculated materials was examined,which gave information on the concentration ranges allowing a complete flocculation,together with a better understanding on the interactions between nanoparticles and clays responsible for *** optimal conditions for magnetically assisted settling were then determined by comparing for each sample sedimentation velocities under gravity and in the presence of a Nd-Fe-B ***,the complex multiscale structure of the flocs in water was explored,through the measurement of several bulk properties(zeta-potential and volume measurements,laser granulometry),while the organization of the materials at a microscopic scale was investigated by cryo-transmission electron microscopy(cryo-TEM)and small-angle X-ray scattering(SAXS).

关键词： magnetic separation nanoparticles clay flocculation decantation characterization

Recentdevelopments in fluorescence- basedmicroscopy applied in biomedical sciences

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电子显微学报 2001年第1期20卷 1-10页

作者： jean-pierre Timmermans Dirk Adriaensen lab. of Cell Biology and Histology University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgium

The present short review aims to give an overview of the most recent developments in fluorescence microscopy and its applications in biomedical sciences. Apart from improvements in well established methods based on conventional fluorescence microscopy and confocal microscopy (fluorescence in situ hybridisation (FISH), tyramide signal amplification (TSA) in immunocytochemistry, new fluorophores), more recently introduced techniques like fluorescence resonance energy transfer (FRET), fluorescence recovery after photobleaching (FRAP), multiphoton microscopy and fluorescence correlation spectroscopy (FCS) will be discussed.

关键词：荧光显微境生物医学应用进展

Complete Isolation System for laboratory Infectious Animal

在线全文

学校读者我要写书评

暂无评论

中国实验动物学报 2005年第S1期13卷 31-32页

作者： jean pierre

Migration of bone marrow progenitor cells in the adult brain of rats and rabbits

在线全文

学校读者我要写书评

暂无评论

World Journal of Stem Cells 2016年第4期8卷 136-157页

作者： Donnahue Dennie jean-pierre louboutin David S Strayer Section of Anatomy Department of Basic Medical SciencesUniversity of the West IndiesMona Campus Department of Cell Biology Anatomy and PathologyThomas Jefferson University

Neurogenesis takes place in the adult mammalian brain in three areas:Subgranular zone of the dentate gyrus(DG);subventricular zone of the lateral ventricle;olfactory *** molecular markers can be used to characterizethe cells involved in adult *** has been recently suggested that a population of bone marrow(BM)progenitor cells may migrate to the brain and differentiate into neuronal *** explore this hypothesis,we injected recombinant SV40-derived vectors into the BM and followed the potential migration of the transduced ***-term BM-directed gene transfer using recombinant SV40-derived vectors leads to expression of the genes delivered to the BM firstly in circulating cells,then after several months in mature neurons and microglial cells,and thus without central nervous system(CNS)*** of transgene-expressing cells expressed NeuN,a marker of mature ***,BM-derived cells may function as progenitors of CNS cells in adult *** mechanism by which the cells from the BM come to be neurons remains to be *** the observed gradual increase in transgene-expressing neurons over 16mo suggests that the pathway involved differentiation of BM-resident cells into neurons,cell fusion as the principal route cannot be totally ruled *** studies using similar viral vectors showed that BM-derived progenitor cells migrating in the CNS express markers of neuronal precursors or immature ***-positive cells were found in the subgranular zone of the DG of the hippocampus 16 mo after intramarrow injection of the *** addition to cells expressing markers of mature neurons,transgene-positive cells were also positive for nestin and doublecortin,molecules expressed by developing neuronal *** cells were actively proliferating,as shown by short term BrdU incorporation *** seizures by using kainic acid increased the number of BM progenitor cells transduced by SV40vectors migrating

关键词： Stem cells Bone marrow Hippocampus Cell therapy SV40 Brain Nestin Doublecortin Neurons Development Epilepsy Seizures

Global dynamics of a model of hepatitis B virus infection in a sub-Saharan African rural area

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Biomathematics 2020年第6期13卷 257-298页

作者： jean pierre II Kouenkam Joseph Mbang Yves Emvudu Department of Mathematics Faculty of Science University of Yaounde I P.O.Box 812 YaoundeCameroon UMI 209 IRD/UPMC UMMISCO Bondy Projet MASAIE INRIA Grand Est France and Projet GRIMCAPEL1RIMACameroun

We formulate and systematically study a deterministic compartmental model of Hepatitis *** model has some important and novel features compared with the well-known basic model in the ***,it takes into account the differential susceptibility that follows the vaccine formulation employing three-doses *** points up the HbeAg status of carriers,their levels of viral replication,the fact that treatment being not curative is recommended only to a small proportion of chronic carriers,and finally the fact that only inactive carriers are able to recover from *** model has simple dynamical behavior which has a globally asymptotically stable disease-free equilibrium when the basic reproduction number R0≤1 and an endemic equilibrium when R0>*** the use of lyapunov functions,when it exists,we prove the global asymptotic stability of the endemic equilibrium under some *** data from Tokombere,a rural area in Cameroon,numerical simulations are *** numerical simulations first confirm analytical results,second they suggest that a policy based on treatment could not significantly impact the course of the ***,they show as it is well known that vaccination is a very effective measure to control the ***,they show that neonatal vaccination influences more the course of infection than mass vaccination ***,they picture how much loss between consecutive doses of vaccine could be ***,it is suggested that for a Sub-saharan African rural area,two-thirds of expected incidence of Hepatitis B virus infection and one third of expected prevalence of chronic carriers could be averted by 2030 if the birth dose vaccination becomes systematic and if mass vaccination rate increases to up 10%.

关键词： Nonlinear dynamical systems lyapunov methods inactive carriers differential susceptibility differential infectivity