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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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Protic ionic liquids/poly(vinylidene fluoride) composite membranes for fuel cell application

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Journal of Energy Chemistry 2021年第2期30卷 197-207,I0008页

作者： Isabel Vazquez-Fernandez Mohamed Raghibi Adnane Bouzina laure timperman Janick Bigarre Meriem Anouti Laboratoire KM2E Parc de GrandmontUniversite de Tours37200ToursFrance CEA-DAM Le Ripault BP16F-37260MontsFrance

Poly(vinylidene fluoride), PVDF, membranes have attracted considerable attention as polymer electrolytes for fuel cells. This study explores the effect of solvent on the spherulite size and the crystallinity of the polymeric membranes. Based on Hansen solubility parameters theory, the mixture of DMC and DMSO was selected among a dozen of solvents for the preparation of PVDF membranes by thermally induced phase separation. The addition of two protic ionic liquids(PILs), bis(2-ethyl hexyl) ammonium hydrogen phosphate [EHNH_2][H_2PO_4], and imidazolium hexanoate [Im][Hex] to PVDF membranes at concentrations(10% < wP IL< 50%) has been investigated by SEM, FTIR, DSC, TGA, EIS, and DMA. The inclusion of ionic liquids into the polymer matrix influences structural parameters(degree of crystallinity and electroactive phases), thermal stability, proton conductivity and mechanical properties of the membranes. The membranes become transparent regardless type of ionic liquid employed. A small amount of ionic liquids increases the degree of crystallinity and facilitates the production of polar β and γ crystals. The proton conductivity mechanism(Grotthuss) is dependent on the ionic liquid structure(due to its selforganization in water) and the content in the PVDF membrane, as well as the membrane water *** behavior has been observed for the two ionic liquids, which stresses the challenge on selecting an appropriate cation and anion combination. The obtained composite membranes exhibited excellent mechanical performance and reduced elastic modulus, with respect to the pure polymer matrix. These results indicate that PVDF/IL composite membranes have a high potential for PEMFC applications.

关键词： PVDF Hansen solubility parameters PILs Proton conductivity

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Evaluating the Spatial Uncertainty of Future Land Abandonment in a Mountain Valley(Vicdessos, Pyrenees-France): Insights from Model Parameterization and Experiments

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Journal of Mountain Science 2015年第5期12卷 1095-1112页

作者： Thomas Houet laure Vacquié David Sheeren GEODE UMR 5602 CNRS –UT2J Université Toulouse Jean Jaurès Maison de la recherche 5 allées Antonio Machado31058 Toulouse Cedex Dynafor UMR 1201 INRA/INPT-ENSAT Ecole Nationale Supérieure Agronomique de Toulouse Avenue del’Agrobiopole B.P. 32607 - Auzeville-Tolosane 31326 - Castanet-Tolosan Cédex

European mountains are particularly sensitive to climatic disruptions and land use *** latter leads to high rates of natural reforestation over the last 50 years. Faced with the challenge of predicting possible impacts on ecosystem services,LUCC models offer new opportunities for land managers to adapt or mitigate their *** the spatial uncertainty of future LUCC is crucial for the definition of sustainable land use strategies. However, the sources of uncertainty may differ, including the input parameters, the model itself, and the wide range of possible futures. The aim of this paper is to propose a method to assess the probability of occurrence of future LUCC that combines the inherent uncertainty of model parameterization and the ensemble uncertainty of the future based scenarios. For this purpose, we used the Land Change Modeler tool to simulate future LUCC on a study site located in the Pyrenees Mountains(France) and two scenarios illustrating two land use strategies. The model was parameterized with the same driving factors used for its calibration. The definition of ‘static vs. dynamic' and ‘quantitative ***(discretized)' driving factors, and their combination resulted in four parameterizations. The combination of model outcomes produced maps of the spatial uncertainty of future LUCC. This work involves adapting the definition of spatial uncertainty in the literature to future-based LUCC studies. It goes beyond the uncertainty of simulation models by integrating the uncertainty of the future to provide maps to help decision makers and land managers.

关键词： Land use Land cover Scenario Model Mountainous reforestation Land abandonment Landmanagement

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In vitro biological activities of aqueous extracts of Tetrapleura tetraptera(Schumach. & Thonn.) taub. and Aframomum citratum(C. Pereira) *** from three Agroecologic Zones in Cameroon

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Asian Pacific Journal of Tropical Medicine 2020年第2期13卷 71-80页

作者： Eyenga Manga Marie laure Fauconnier Judith laure Ngondi Akoumou Manga Ngando Marianne Sindic Laboratory of Quality and Safety of Agro-food Products TERRAGembloux AgroBio-TechUniversity of LiegePassage des Déportés25030 Gembloux-Belgium Laboratory of chemistry of natural molecules Gembloux Agro-Bio TechUnivervity of LiegePassage des Déportés25030 Gembloux-Belgium Laboratory of Nutrition and Nutritional Biochemistry Department of BiochemistryFaculty of SciencesYaounde I universityPO.Box:812YaoundeCameroon National Institut of Cartography Ministry of Scientific Research and InnovationsPO.Box:157YaoundéCameroon

Objective:To investigate some phytochemical constituents and biological activities of twelve samples of Tetrapleura tetraptera(Schumach&Thonn.)*** nine samples of Aframomum citratum(***)*** fruits collected in the bimodal forest zone(ZONEⅤ),the unimodal forest zone(ZONEⅣ)and the highlands zone(ZONEⅢ)in ***:Fresh fruits extracts were obtained by aqueous infusion(100℃during 15 min)and evaluated by spectrophotometric methods for total polyphenol(TPP),total flavonoids(TFLV)contents and antioxidant(DPPH,total antioxidant capacity by the phosphomolybdenum method,iron reducing power or ferric reducing antioxidant power and inhibition of beta carotene discoloration assays)and anti-inflammatory(inhibitions of protein denaturation and 5-LOX represented by *** and INH.5-LOX respectively)*** component analysis was ***:For both species,fruits from ZONEⅤhave the highest TPP,TFLV levels and biological *** and TFLV content of Aframomum citratum and Tetrapleura tetraptera fruits are positively and significantly(P<0.05)*** biological activities of all extracts(0.25,2.5,25,250 mg/mL)were dosedependent and the extracts have shown strong antioxidant and antiinflammatory activities,but less than references(ascorbic acid,diclofenac,quercetin,and butylated hydroxytoluene).There was a positive correlation between TPP,TFLV and total antioxidant capacity,ferric reducing antioxidant power,and inhibition of beta carotene discoloration assays,and inverse correlations were observed with the IC50(g/mL)of DPPH,INH.5-LOX and *** assays for both ***:The fruits exhibit variabilities and those from ZONEⅤfor both species are economically and healthcare challenging for herbalists,pharmaceutical firms,scientists and ***,most important extraction yield of bioactive compounds correlated with significant biological activities and the use of less material compared with an implementation in o

关键词： Biological activities Non-Timber forest products Antioxidant Anti-inflammatory Agro-ecologic Zone Protein denaturation

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Hypoxia Is a Developmental Regulator in Plant Meristems

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Molecular Plant 2019年第11期12卷 1422-1424页

作者： Anne-laure Le Gac Thomas Laux Signalling Research Centres BIOSS and CIBSS Faculty of BiologyUniversity of FreiburgSchanzlestrasse 179104 FreiburgGermany Sino-German Joint Research Center on Agricultural Biology Shandong Agricultural UniversityTai'anShandongChina

Despite the presence of about 21%O2 in the atmosphere,organs of plants and mammals are inevitably subject to lower O2 tensions(pO2)due to high O2 demand in metabolic active cells and limited O2 transport *** humans,for example,the p O2 decreases from the ambient 21%(160 mm Hg)of the inhaled air to 2%-9%in the internal organs(Brahimi-Horn and Pouyssegur,2007).To cope with this limited oxygen supply,aerobic organisms have developed a variety of adaptive responses at cellular,tissue,and organismal levels(Bailey-Serres et al.,2012).Although low O2 tensions are the normal conditions for organs,the ambient 21%O2 is usually referred to as normoxia and the lower internal concentrations as hypoxia(van Dongen and Licausi,2015).

关键词： Hypoxia Developmental Regulator ambient Plant Meristems

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On a fractional stochastic Hodgkin-Huxley model

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International Journal of Biomathematics 2018年第5期11卷 1-16页

作者： laure Coutin Jean-Marc Guglielmi Nicolas Marie Institut de Mathematiques de Toulouse Toulouse France American Hospital of Paris NeuiUy-sur-Seine France Laboratoire Modal'X Universite Paris 10 Nanterre France ESME Sudria Paris France

The model studied in this paper is a stochastic extension of the so-called neuron model introduced by Hodgkin and Huxley. In the sense of rough paths, the model is perturbed by a multiplicative noise driven by a fractional Brownian motion, with a vector field satisfying the viability condition of Coutin and Marie for R× [0, 1]3. An application to the modeling of the membrane potential of nerve fibers damaged by a neuropathy is provided.

关键词： Hodgkin-Huxley model stochastic differential equations fractional Brownian motion viability theorem.

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Microstructure and texture evolution of nonoriented silicon steel during the punching process

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International Journal of Minerals,Metallurgy and Materials 2022年第11期29卷 2064-2071页

作者： Xiang Fang Wei Wang François Brisset Anne-laure Helbert Thierry Baudin School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China Hubei Research Center for New Energy&Intelligent Connected Vehicle Wuhan University of TechnologyWuhan 430070China Institut de Chimie Moléculaire et des Matériaux d’Orsay UniversitéParis-SaclayCNRS91405 OrsayFrance

The iron core of a motor is mainly manufactured from rolled nonoriented silicon steel using a punching process that leads to deformation and texture evolution at the cutting *** to this process,circular samples of nonoriented silicon steel were prepared by punching using blunt punch *** this work,two positions along the rolling and transverse directions at the cutting edge were *** main mechanisms of deformation for both positions are dislocation slip and formation of shear *** two mechanisms lead to similar texture evolutions for both *** dislocation slip leads to the formation of the{221}component in the unbending area(200μm away from the cutting edge)and intermediate continuum-bent ***,the evolution of the texture from the{111}γfiber to the{110}fiber was observed at the extremity of the cutting edge with the formation of shear bands.

关键词： microstructure texture nonoriented silicon steel punching

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Overview and detectability of the genetic modifications in ornamental plants

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Horticulture Research 2020年第1期7卷 2622-2633页

作者： Anne-laure Boutigny Nicolas Dohin David Pornin Mathieu Rolland Anses Plant Health LaboratoryBacteriology Virology GMO Unit7 rue Jean Dixméras49044 Angerscedex 01France

The market of ornamental plants is extremely competitive,and for many species genetic engineering can be used to introduce original traits of high commercial ***,very few genetically modified(GM)ornamental varieties have reached the market so ***,the authorization process required for such plants has a strong impact on the profitability of the development of such *** the numerous scientific studies using genetic modification on ornamental species of interest,a lot of transformed material has been produced,could be of commercial interest and could therefore be unintentionally released on the *** unintentional use of GM petunia in breeding programs has indeed recently been *** review lists scientific publications using GM ornamental plants and tries to identify whether these plants could be detected by molecular biology tools commonly used by control laboratories.

关键词： breeding ornamental lists

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Inter-individual variation in provisioning rate,prey size and number,and links to total prey biomass delivered to nestlings in the Collared Flycatcher(Ficedula albicollis)

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Avian Research 2021年第2期12卷 237-246页

作者： laure Cauchard Elise Isabella Macqueen Rhona Lilley Pierre Bize Blandine Doligez School of Biological Sciences University of AberdeenAberdeenUK Department of Biometry and Evolutionary Biology CNRSUniversity of LyonUniversity Lyon 1VilleurbanneFrance Animal Ecology Department of Ecol-ogy and GeneticsEvolutionary Biology CentreUppsala UniversityUppsalaSweden

Background:In bird species where offspring growth and survival rely on parents’food provisioning,parents can maximise their fitness by increasing the quantity and/or the quality of preys delivered to their *** studies have focused on inter-individual variation in feeding rate,yet this measure may not accurately reflect the total amount of food(***)provided by parents if there is large variation in the quantity and quality of preys at each ***,we explored the relative role of individual(sex,age,body condition),breeding(hatching date,brood size)and environmental(temperature)factors on feeding rate,prey number,size and quality,and their contribution to total prey biomass delivered to the nestlings of 164 Collared Flycatcher(Ficedula albicollis)parents in 98 ***:Preys delivered to the nest were mainly larvae(53.6%)and flying insects(45.6%).Feeding rate increased with brood size and age,and was higher in males than *** prey number decreased,but mean prey size increased,as the season progressed and parents feeding their brood with primary larvae brought more preys per *** between feeding rate,mean prey number and size remained when taking into account the provision-ing quality:parents brought either a large number of small prey or a small number of larger items,and the force of the trade-offs between feeding rate and mean prey number and size depended on the quality of the provisioning of the *** the percentage of larvae among preys in the provisioning,the variance in total prey biomass was foremost explained by feeding rate(65.1%to 76.6%)compared to mean prey number(16.4%to 26%)and prey size(2.7%to 4%).Conclusions:Our study shows that variation in feeding rate,prey number,size,but not quality(*** of lar-vae),were influenced by individual factors(sex and age)and breeding decisions(brood size and timing of breeding)and that,whatever the provisioning strategy adopted,feeding rate was the b

关键词： Collared Flycatcher Feeding rate Foraging Niche breadth Prey selection Provisioning strategy Reproductive investment

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High tacrolimus intra-patient variability is associated with graft rejection,and de novo donor-specific antibodies occurrence after liver transplantation

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World Journal of Gastroenterology 2018年第16期24卷 1795-1802页

作者： Arnaud Del Bello Nicolas Congy-Jolivet Marie Danjoux Fabrice Muscari laurence Lavayssière laure Esposito Anne-laure Hebral Julie Bellière Nassim Kamar Department of Nephrology and Organ Transplantation CHU RangueilToulouse 31000France Université Paul Sabatier Toulouse 31000France Molecular Immunogenetics Laboratory Facultéde Médecine PurpanIFR150(INSERM)Montréal H3G 1Y6France Department of Immunology CHU de ToulouseHopital de RangueilCHU de ToulouseToulouse 31000France Department of Pathology Institut Universitaire du CancerCHU Toulouse 31000France Department of Surgery and Liver Transplantation Toulouse 31000France INSERM IFR-BMTCHU PurpanToulouse 31000France

AIM To investigate the role of tacrolimus intra-patient variability(IPV) in adult liver-transplant *** We retrospectively assessed tacrolimus variability in a cohort of liver-transplant recipients and analyzed its effect on the occurrence of graft rejection and de novo donor-specific antibodies(dn DSAs), as well as graft survival during the first 2 years posttransplantation. Between 02/08 and 06/2015, 116 patients that received tacrolimus plus mycophenolate mofetil(with or without steroids) were included. RESULTS Twenty-two patients(18.5%) experienced at least one acute-rejection episode(BPAR). Predictive factors for a BPAR were a tacrolimus IPV of > 35% [OR = 3.07 95%CI(1.14-8.24), P = 0.03] or > 40% [OR = 4.16(1.38-12.50), P = 0.01), and a tacrolimus trough level of 35% [OR = 4.83, 95%CI(1.39-16.72), P = 0.01] and > 40% [OR = 9.73, 95%CI(2.65-35.76), P = 0.001] were identified as predictors to detect dn DSAs. IPV did not impact on patient-or graft-survival rates during the follow-up. CONCLUSION Tacrolimus-IPV could be a useful tool to identify patients with a greater risk of graft rejection and of developing a de novo DSA after liver

关键词： Variability Liver transplantation Donorspecific antibodies Immunosuppression

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