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A study on wildfire impacts on greenhouse gas emissions and regional air quality in South of Orléans,France

Journal of Environmental Sciences 2024年第1期135卷 521-533页

作者： Chaoyang Xue Gisèle Krysztofiak Yangang Ren Min Cai Patrick Mercier Frédéric Le Fur Corinne Robin Benoit Grosselin Véronique daele Max RMcGillen Yujing Mu Valéry Catoire Abdelwahid Mellouki Laboratoire de Physique et chimie de l’Environnement et de l’Espace(LPC2E) CNRS–UniversitéOrléans–CNES(UMR 7328)Orléans Cedex 245071France Institut de Combustion AérothermiqueRéactivitéEnvironnement(ICARE)CNRSOrléans Cedex 245071France Research Centre for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China Lig’Air-Association de surveillance de la qualitéde l’air en région Centre-Val de Loire Saint-Cyr-en-Val 45590France Mohammed V University RabatMorocco

Wildfire events are increasing globally which may be partly associated with climate change,resulting in significant adverse impacts on local,regional air quality and global *** September 2020,a small wildfire(burned area:36.3 ha)event occurred in Souesmes(Loiret-Cher,Sologne,France),and its plume spread out over 200 km on the following day as observed by the MOdIS *** on measurements at a suburban site(~50 km northwest of the fire location)in Orléans and backward trajectory analysis,young wildfire plumes were *** increases in gaseous pollutants(CO,CH_(4),N_(2)O,VOCs,etc.)and particles(including black carbon)were found within the wildfire plumes,leading to a reduced air *** factors,defined as EF(X)=ΔX/ΔCO(where,X represents the target species),of various trace gases and black carbon within the young wildfire plumes were determined accordingly and compared with previous *** in the ambient ions(such as ammonium,sulfate,nitrate,chloride,and nitrite in the particle-and gasphase)and aerosol properties(e.g.,aerosol water content,aerosol p H)were also quantified and ***,we estimated the total carbon and climate-related species(e.g.,CO_(2),CH_(4),N_(2)O,and BC)emissions and compared them with fire emission *** biomass burning emission inventories have uncertainties in estimating small fire burned areas and *** instance,we found that the Global Fire Assimilation System(GFAS)may underestimate emissions(e.g.,CO)of this small wildfire while other inventories(GFEd and FINN)showed significant *** that it is the first time to record wildfire plumes in this region,related atmospheric implications are presented and discussed.

关键词： Wildfire Air quality Emission factor Emission inventory VOLTAIRE supersite

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Electronic engineering of Co-Ru diatomic sites and Ru nanoparticles for synergistic promotion of hydrogen evolution

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Nano Research 2024年第5期17卷 3714-3723页

作者： Wei Zhang Cong Li Yongyong Cao Jun-Yang Ji Zhao-Chen Li Zheng Niu Hongwei Gu Pierre Braunstein Jian-Ping Lang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China College of Biological Chemical Science and EngineeringJiaxing UniversityJiaxing 314001China Universitéde Strasbourg-CNRS Institut de Chimie(UMR 7177 CNRS)4 rue Blaise Pascal-CS 9003267081 StrasbourgFrance

The coexistence of multi-component active sites like single-atom sites,diatomic sites(dAS)and nanoclusters is shown to result in superior performances in the hydrogen evolution reaction(HER).Metal diatomic sites are more complex than single-atom sites but their unique electronic structures can lead to significant enhancement of the HER *** the synthesis and identification of dAS is usually challenging,we report a simple access to a diatomic catalyst by anchoring Co-Ru dAS on nitrogen-doped carbon supports along with Ru nanoparticles(NPs).Experimental and theoretical results revealed the atomic-level characteristics of Co-Ru sites,their strong electronic coupling and their synergy with Ru NPs within the *** unique electronic structure of the catalyst resulted in an excellent HER activity and stability in alkaline *** work provides a valuable insight into a widely applicable design of diatomic catalysts with multi-component active sites for highly efficient HER electrocatalysis.

关键词： Co-Ru diatomic sites Ru nanoparticles multiple active sites synergistic effect hydrogen evolution reaction

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One-step controlled electrodeposition nickel sulfides heterointerfaces favoring the desorption of hydroxyl groups for efficient hydrogen generation

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Rare Metals 2024年第9期43卷 4377-4386页

作者： Ru-Chun Li Xin-Yue Zhang Ze-Yue Qu Feng-Yi Liu Quan-Qing Xu Zhao-Xia Hu Jing-Wei Li Mohamed-Nawfal Ghazzal Jin-Li Yu Faculty of Chemistry and Chemical Engineering Yunnan Normal UniversityKunming 650500China Foshan Gaoke Hechuang Technology Co. Ltd.Foshan 528200China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Universite´Paris-Saclay UMR 8000 CNRSInstitut de Chimie PhysiqueOrsay 91405France department of Chemistry City University of Hong KongHong Kong 999077China

The heterointerface engineering involving different components or phases represents a desirable strategy for enhancing the sluggish kinetics of hydrogen evolution reaction(HER).However,constructing desired heterointerfaces and elucidating the reaction mechanisms on the interface remains a considerable *** this work,we propose a straightforward electrochemical synthesis strategy to prepare the nickel sulfide-based heterointerfaces for *** mechanism of electrochemical synthesis is revealed,wherein metal-thiourea species can be formed at the cathode potential and subsequently oxidized to nickel sulfides at the anode *** this mechanism,a range of nickel sulfides,including NiS,Ni_(3)S_(2)/NiS,Ni/Ni_(3)S_(2)and Ni_(3)S_(2),have been successfully synthesized by tuning the potential range of cyclic *** these,the obtained Ni_(3)S_(2)/NiS@CC(CC:carbon cloth)exhibits the smallest overpotential of84 mV at 10 mA·cm^(-2)and high *** calculations further reveal that the combination of NiS and Ni_(3)S_(2)induces electron redistribution at the interface,and thus the Volmer process is effectively promoted with faster water dissociation and OH desorption ***,the simplicity method coupled with a clear synthesis mechanism and outstanding HER performance highlights its promising potential for practical applications.

关键词： Hydrogen evolution reaction Heterointerfaces OH desorption kinetics Electrochemical synthesis

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Recent advances on application of polysaccharides in cosmetics

Journal of dermatologic science and cosmetic technology

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Journal of dermatologic science and cosmetic technology 2024年第1期1卷 21-36页

作者： Qingyuan Wu Na Cheng danjiao Fang Hao Wang Faiz-Ur Rahman Huifang Hao Yongmin Zhang Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources School of Chemistry and Chemical EngineeringInner Mongolia UniversityHohhot 010021China Sorbonne Université CNRSInstitut Parisien de Chimie MoléculaireUMR 82324 Place Jussieu75005 ParisFrance Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

Natural products have attracted wide attention in the cosmetics market due to their safety and high *** a highly active substance in nature,natural polysaccharides have been reported in recent years to have various cosmetic activities such as moisturizing,whitening,anti-aging and repairing skin,and are becoming a hot research topic in the cosmetics *** present,the mechanism of polysaccharide exerting cosmetic activity has been widely studied,but the relationship between polysaccharide’s chemical structure and cosmetic activity has not been effectively analyzed,which leads to the limitation of polysaccharide *** this review,the mechanism of polysaccharides exerting cosmetic activities such as moisturizing,whitening,anti-aging and skin repair was *** potential relationship between the structure and activity of polysaccharides was summarized by analyzing the influence of physical and chemical properties of polysaccharides,such as extraction method,molecular weight,monosaccharide composition,functional group and structural modification,etc.,which laid a foundation for the analysis of the structure-activity relationship of polysaccharides and improved its cosmetic value.

关键词： Polysaccharide Cosmetics Physical and chemical properties Structure-activity relationship Biological activity

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Mitochondria-targeted atovaquone promotes anti-lung cancer immunity by reshaping tumor microenvironment and enhancing energy metabolism of anti-tumor immune cells

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Cancer Communications 2024年第3期44卷 448-452页

作者： donghai Xiong Zheng Yin Mofei Huang Yian Wang Micael Hardy Balaraman Kalyanaraman Stephen T Wong Ming You Center for Cancer Prevention Houston Methodist Neal Cancer CenterHouston Methodist HospitalWeill Cornell MedicineHoustonTexasUSA department of Systems Medicine and Bioengineering Houston Methodist Cancer CenterHouston Methodist HospitalWeill Cornell MedicineHoustonTexasUSA Aix Marseille Univ Centre Nationaldela Recherche Scientifique(CNRS)Institut de Chimie Radicalaire(ICR)UnitéMixte de Recherche(UMR)7273MarseilleFrance department of Biophysics Medical College of WisconsinMilwaukeeWisconsinUSA

dear Editor,Atovaquone(ATO),a mitochondrial inhibitor,has anti-cancer effects[1].Based on ATO,we developed mitochondria-targeted atovaquone(Mito-ATO)that had even stronger anti-tumor efficacy than ATO[2].We syn-thesized Mito-ATO by attaching the bulky triphenylphos-phonium(TPP)group to ATO via a ten-carbon alkyl chain(Supplementary file of methods;Supplementary Figure S1).

关键词： metabolism immunity targeted

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The unmediated choline sensor based on layered double hydroxides in hydrogen peroxide detection mode

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Science China Chemistry 2009年第12期52卷 2281-2286页

作者： dING ShouNian SHAN dan YAO WenJuan XUE HuaiGuo SUN YueMing COSNIER Serge School of Chemistry&Chemical Engineering Southeast UniversityNanjing 211189China Key Laboratory of Environmental Materials&Environmental Engineering of Jiangsu Province Yangzhou 225002China School of Chemistry&Chemical Engineering Yangzhou UniversityYangzhou 225002China départment de chimie moléculaire umr-5250 ICMG FR-2607CNRS UniversitéJoseph FouierBP-53Grenoble 38041France

In this work,we have developed a novel choline biosensor on the basis of immobilization of choline oxidase (ChOx) by the attractive materials layered double hydroxides (LdHs). Amperometric detection of choline was evaluated by holding the modified electrode at 0.5 V (vs. SCE). due to the special properties of LdHs ([Zn3-Al-Cl]),such as chemical inertness,high porosity,and swelling property,the [Zn3-Al-Cl]/ChOx modified electrode exhibited an enhanced analytical performance. The biosensor provided a linear response to choline over a concentration range from 3.7 × 10-6 to 6.3 × 10-4 M with a low detection limit of 3 × 10-7 M based on S/N=3. The apparent Michaelis-Menten constant was calculated to be 1.38 mM. In addition,the interaction between ChOx and LdHs has also been investigated using FT-IR spectroscopy.

关键词： layered double hydroxides clay choline oxidase choline biosensor

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Epitaxial Growth of Gd_(0.67)Ca_(0.33)MnO_3 Thin Films by Laser Ablation

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Journal of Rare Earths 2004年第6期22卷 739-742页

作者：马衍伟 Guilloux Viry M Barahona P Pea O Moure C Applied Superconductivity Laboratory Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100080 China Chimie du Solide et Inorganique Moléculaire UMR 6511 CNRS - Université de Rennes 1 Institut de Chimie de Rennes 35042 Rennes France chimie du Solide et Inorganique moléculaire UMR 6511 CNRS - Université de Rennes 1 Institut de Chimie de Rennes 35042 Rennes France Instituto de Ceramica y Vidrio CSIC Campus de Cantoblanco 28049 Madrid Spain

Gd_(0.67)Ca_(0.33)MnO_3(GCMO)thin films grown by laser ablation on SrTiO_3(100)(STO)substrates was studied. Films are highly crystallized, very well epitaxial and single-phased. The ordering magnetic temperature(T_c)of the films is much higher than the value of bulk samples of similar composition. It is found that the GCMO film exhibits a reversal of its magnetization at low temperature when cooled under a magnetic field. The negative magnetization is a consequence of the rapid increase(～1/T)with decreasing temperature of the magnetization of a sublattice aligned antiparallel to the local field, relative to the magnetic contribution of a second sublattice which is aligned parallel to the applied field.

关键词： pulsed laser deposition Gd_(0.67)Ca_(0.33)MnO_3 thin films magnetic properties

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dialkyl imidazolium acetate ionosilica as efficient and recyclable organocatalyst for cyanosilylation reactions of ketones

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Green Energy & Environment 2020年第2期5卷 130-137页

作者： Thanh Tran duy Alysson duarte Rodrigues Giang Vo-Thanh Peter Hesemann Institut de chimie moléculaire et des Matériaux d'Orsay UniversitéParis-SaclayUMR 818291405 Orsay CedexFrance Institut Charles Gerhardt de Montpellier Universitéde MontpellierUMR 5253 CNRS-UM-ENSCMPlace E.Bataillon34000 MontpellierFrance

We report new heterogeneous organocatalyst based on silica hybrid supported N-heterocyclic carbene(NHC-)*** organocatalyst is formed from an imidazolium iodide based ionosilica material,followed by iodide/acetate anion *** imidazolium acetate generates the organocatalytic carbene via partial deprotonation of the imidazolium ring in *** monitored via EdX,solid state NMR and ion chromatography measurements,the iodide/acetate exchange involving the imidazolium ionosilica material took place only in small *** the fact that the exchanged material contains only a very small amount of acetate,we observed good catalytic activity and recyclability in cyanosilylation reactions of ketones with trimethylsilyl *** versatility of the catalyst was highlighted via reaction with several substrates,yielding the corresponding cyanohydrins in good *** recycling experiments,the material showed decreasing catalytic activity starting from the third reaction cycle,but high catalytic activity can be regenerated via another acetate *** work is important as it highlights the possibility to combine carbene chemistry and silica,which are antagonistic at a first *** show that imidazolium acetate based ionosilicas are therefore heterogeneous'proto-carbenes',and that there is no need to form strongly basic silica supported NHCs to obtain heterogeneous *** work therefore opens the route towards heterogeneous and re-usable NHC-organocatalysts from supported ionic liquid imidazolium acetates.

关键词： N-heterocyclic carbenes Ionosilica Heterogeneous organocatalysis Cyanosilylation Ionic liquids

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Synthesis of P,N-2,2'-biphenyl derivatives with central chirality

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Science China Chemistry 2010年第9期53卷 1907-1913页

作者： JEAN Ludovic POULIQUEN Michael BLANCHET Jérme LASNE Marie-Claire ROUdeN Jacques Laboratoire de chimie moléculaire et Thioorganique UMR 6507 CNRS-ENSICAEN & Université de Caen-Basse Normandie6 Boulevard du Maréchal Juin14050 CaenInstitut Normand de Chimie MoléculaireMédicinale et Macromoléculaire(INC3M)

Enantiopure 2-(dicyclohexylphosphino)-1,1'-biphenyl derivatives substituted in the 2'-position by a chiral amino group were *** the compound bearing an acyclic chiral chain,the key step was a Suzuki coupling between bromobenzeneboronic acid and N-Boc-iodoaniline whereas an aromatic nucleophilic substitution allowed the introduction of a chiral pyrrolidine in the 2'-position of the biphenyl *** efficiency of the P,N-biphenyl pyrrolidine derivatives as ligands in Pd-catalyzed arylaminations compares well with that of davePhos ligand.

关键词： 3-aminopyrrolidines Suzuki coupling biphenyls chiral ligand arylamination

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New 4-imino-4H-Chromeno[2,3-d]Pyrimidin-3(5H)-Amine: Synthesis, Cytotoxic Effects on Tumoral Cell Lines and in Silico AdMET Properties

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International Journal of Organic Chemistry 2024年第3期14卷 107-122页

作者： Marwa dhiabi Sirine Karoui Mehdi Fakhfakh Souhir Abid Emmanuelle Limanton Rémy Le Guével Thierry Charlier Ludovic Paquin Jean-Pierre Bazureau Houcine Ammar Laboratoire de chimie Applique: Htrocycles Corps et Polymres Facult des Sciences de Sfax Universit de Sfax Sfax Tunisie Institut des Sciences Chimiques de Rennes Universit de Rennes Campus de Beaulieu Rennes Cedex France department of Chemistry (Science and Arts): Al Qurayat Al-Jouf University Al Jawf Saudi Arabia S2Wave Platform ScanMAT UAR CNRS Universit de Rennes Campus de Beaulieu Rennes Cedex France ImPACcell Platform Biosit SFR UMS CNRS Inserm Campus de Villejean Rennes France Institut de Recherche en Sant Environnement et Travail IRSET Inserm UMR_S Rennes France

The synthesis of new 4-imino-4H-chromeno[2,3-d]pyrimidin-3(5H)-amine in four steps including one step under microwave dielectric heating is reported. The structural identity of the synthesized compounds was established according to their spectroscopic analysis, such as FT-IR, NMR and mass spectroscopy. These new compounds were tested for their antiproliferative activities on seven representative human tumoral cell lines (Huh7 d12, Caco2, MdA-MB231, MdA-MB468, HCT116, PC3 and MCF7) and also on fibroblasts. Among them, only the compounds 6c showed micromolar cytotoxic activity on tumor cell lines (1.8 50 50 > 25 μM). Finally, in silico AdMET studies ware performed to investigate the possibility of using of the identified compound 6c as potential anti-tumor compound.

关键词： 2-Amino-4H-Chromene 4H-Chromeno[2 3-d]Pyrimidin-3(5H)-Amine Microwave Irradiation Tumoral Cell Line in Silico AdMET

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