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Depleted uranium oxide supported nickel catalyst for autothermal CO_(2)methanation in non-adiabatic reactor under induction heating

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Journal of Energy Chemistry 2023年第10期85卷 310-323,I0010页

作者： Lai Truong-Phuoc jean-Mario Nhut Loïc Vidal Cuong Duong-Viet Sécou Sall Corinne Petit christophe Sutter Mehdi Arab Alex Jourdan Cuong Pham-Huu Institute of Chemistry and Processes for Energy Environment and Health(ICPEES)ECPMUMR 7515 CNRS-University of Strasbourg25 rue Becquerel67087 Strasbourg Cedex 02France BlackLeaf SAS 210 rue Geiler de Kaysersberg67400 IllkirchFrance Institute of Materials Science of Mulhouse IS2MUMR 7361Universitéde Haute-AlsaceCNRS15rue Jean Starcky-BP 248868057 MulhouseFrance ORANO Tricastin Direction de La Recherche&DéveloppementSite du TRICASTIN BP 1626701 Pierrelatte CedexFrance

Undoped nickel-based catalysts supported on depleted uranium oxide allow one to carry out CO_(2)methanation process under extremely low reaction temperature under atmospheric pressure and powered by a contactless induction *** adjusting the reaction conditions,the catalyst is able to perform CO_(2)methanation reaction under autothermal process operated inside a non-adiabatic reactor,without any external energy *** autothermal process is possible thanks to the high apparent density of the UO_x which allows one to confine the reaction heat in a small catalyst volume in order to confine the exothermicity of the reaction inside the catalyst and to operate the reaction at equilibrium heat in-heat *** autothermal operation mode allows one to significantly reduce the complexity of the process compared to that operated using adiabatic reactor,where complete insulation is required to prevent heat disequilibrium,in order to reduce as much as possible,the heat exchange with the external *** catalyst displays an extremely high stability as a function of time on stream as no apparent *** is expected that such new catalyst with unprecedented catalytic performance could open new era in the field of heterogeneous catalysis where traditional supports show their limitations to operate catalytic processes under severe reaction conditions.

关键词： CO_(2)methanation Auto-methanation Induction heating Depleted uranium oxide Electrification process Operando DRIFTS

Circulating tumor cell isolation:the assets of filtration methods with polycarbonate track-etched filters

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Chinese Journal of Cancer Research 2015年第5期27卷 479-487页

作者： Claire Dolfus Nicolas Piton Emmanuel Toure jean-christophe Sabourin Department of Pathology Rouen University Hospital Inserm U1079 Institute for Biomedical Research and InnovationUniversity of Rouen

Circulating tumor cells （CTCs） arise from primary or secondary tumors and enter the bloodstream by active or passive intravasation. Given the low number of CTCs, enrichment is necessary for detection. Filtration methods are based on selection of CTCs by size using a filter with 6.5 to 8 pm pores. After coloration, collected CTCs are evaluated according to morphological criteria. Immunophenotyping and fluorescence in situ hybridization techniques may be used. Selected CTCs can also be cultivated in vitro to provide more material. Analysis of genomic mutations is difficult because it requires adapted techniques due to limited DNA materials. Filtration-selected CTCs have shown prognostic value in many studies but multicentric validating trials are mandatory to strengthen this assessment. Other clinical applications are promising such as follow-up, therapy response prediction and diagnosis. Microfluidic emerging systems could optimize filtration-selected CTCs by increasing selection accuracy.

关键词： Circulating tumor ceils (CTCs) biological markers filtration

Response of C and N cycles to N fertilization in Sphagnum and Molinia-dominated peat mesocosms

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Journal of Environmental Sciences 2019年第3期31卷 264-272页

作者： Fabien Leroy Sébastien Gogo christophe Guimbaud André-jean Francez Renata Zocatelli Christian Défarge Léonard Bernard-Jannin Zhen Hu Fatima Laggoun-Défarge University of Orleans ISTO CNRS ISTO BRGM ISTO University of Orleans LPC2E CNRS LPC2E UMR CNRS 6553 ECOBIO University of Rennes 1 University of Orleans Cellule R&D CETRAHE School of Environmental Science and Engineering Shandong University

Plant communities play an important role in the C-sink function of peatlands. However,global change and local perturbations are expected to modify peatland plant communities,leading to a shift from Sphagnum mosses to vascular plants. Most studies have focused on the direct effects of modification in plant communities or of global change(such as climate warming, N fertilization) in peatlands without considering interactions between these disturbances that may alter peatlands' C function. We set up a mesocosm experiment to investigate how Greenhouse Gas(CO_2, CH_4, N_2O) fluxes, and dissolved organic carbon(DOC)and total dissolved N(TN) contents are affected by a shift from Sphagnum mosses to Molinia caerulea dominated peatlands combined with N fertilization. Increasing N deposition did not alter the C fluxes(CO_2 exchanges, CH_4 emissions) or DOC content. The lack of N effect on the C cycle seems due to the capacity of Sphagnum to efficiently immobilize N. Nevertheless, N supply increased the N_2O emissions, which were also controlled by the plant communities with the presence of Molinia caerulea reducing N_2O emissions in the Sphagnum mesocosms. Our study highlights the role of the vegetation composition on the C and N fluxes in peatlands and their responses to the N deposition. Future research should now consider the climate change in interaction to plants community modifications due to their controls of peatland sensitivity to environmental conditions.

关键词： CO2 and CH4 N2O Peatland Plant community composition Sphagnum moss Graminoid

Involvement of chemosensory proteins in host plant searching in the bird cherry-oat aphid

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Insect Science 2021年第5期28卷 1338-1353页

作者： Xiong Peng Lang Liu Yi-Xiao Huang Su-Ji Wang De-Xian Li Shu-Ting Chen jean-christophe Simon Ming-Jing Qu Mao-Hua Chen State Key Laboratory of Crop Stress Biology for Arid Areas Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural AffairsNorthwest A&F UniversityYang lingShaanxi Province712100China IGEPP UMR 1349 INRAAgrocampus OuestUniv Rennes 1F-35653 Domaine De La MotteLe RheuFrance Shandong Academy of Agricultural Sciences Shandong Peanut Research InstituteQingdaoShandong266100China

Chemosensory systems are considered to play an important role in host plant selection in herbivorous ***,few studies have focused on chemosensory proteins(CSPs)for aphid host-location *** roles of CSPs in searching for different Poaceae species(wheat,barley,triticale,maize and sorghum)were tested in Rhopalosiphum padi,an important cereal *** olfactometer assays showed that *** responds to plant *** *** CSP genes were *** of aphid morph,tissue and starvation state on expression patterns of CSPs was *** levels of CSPI,CSP4,CSP5 and CSP6 in winged aphids were significantly higher than those in wingless *** levels of four genes(CSPI,CSP4,CSP5 and CSP6)were relatively higher in the head with antennae,and the four genes tended to be upregulated follow ing *** of three CSPs(CSP4,CSP5 and CSP6)altered aphid host-location behavior in response to the five different host plants *** volatile compounds of host plants(octanal,[E]-2-hexenol and linalool)have signif-icant attraction to winged *** according to the four-arm olfactometer *** docking predicted hydrogen bonding sites which played key roles in the binding of CSP4,CSP5 and CSP6 with volatile *** of CSP4 or CSP5 significantly decreased the staying time of *** in the arms with ***,knockdown of CSP6 could not affect the response of *** to *** results bring evidence for the involvement of three CSPs in *** host-location behavior.

关键词： host choice experiment olfactometer Rhopalosiphum padi RNAi starvation wing form

Neonatal sepsis: within and beyond China

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Chinese Medical Journal 2020年第18期133卷 2219-2228页

作者： Ying Dong Romain Basmaci Luigi Titomanlio Bo Sun jean-christophe Mercier Department of Neonatology Children’s Hospital of Fudan UniversityShanghai 201102China Universitéde Paris IAMEINSERM75018 ParisFrance Service de Pédiatrie-Urgences AP-HPHôpital Louis-Mourier92700 ColombesFrance Pediatric Emergency Department Robert Debre University Hospital75019 ParisFrance Departments of Pediatrics and Neonatology Children’s Hospital of Fudan UniversityShanghai 201102China Medical University of Paris 75018 ParisFrance

Sepsis remains a significant cause of neonatal morbidity and mortality in China.A better understanding of neonatal sepsis in China as compared with other industrialized and non-industrialized countries may help optimize neonatal health care both regionally and *** cited in this review was retrieved from PubMed using the keywords"neonatal sepsis,""early-onset(EOS)"and"late-onset(LOS)"in English,with the focus set on population-based *** review provides an updated summary regarding the epidemiology,pathogen profile,infectious work-up,and empirical treatment of neonatal sepsis within and beyond *** incidence of neonatal EOS and the proportion of Group B Streptococcus(GBS)within pathogens causing EOS in China seem to differ from those in developed countries,possibly due to different population characteristics and intrapartum/postnatal health care *** to adopt GBS screening and intrapartum antibiotic prophylaxis in China remains highly *** pathogen profile of LOS in China was shown to be similar to other ***,viruses as potential pathogens of neonatal LOS have been *** antimicrobial resistance in China reflects limitations in adapting antibiotic regimen to local microbial profile and timely cessation of treatment in non-proven bacterial *** review stresses that the local epidemiology of neonatal sepsis should be closely monitored in each institution.A prompt and adequate infectious work-up is critically important in diagnosing neonatal *** and appropriate antibiotic strategies must be overemphasized to prevent the emergence of multi-resistant bacteria in China.

关键词： Antibiotic resistance Blood culture Early-onset sepsis Late-onset sepsis Neonatal sepsis Nosocomial neonatal sepsis

Long-term stability of gentamicin sulfate-ethylenediaminetetraacetic acid disodium salt (EDTA-Na_2) solution for catheter locks

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Journal of Pharmaceutical Analysis 2018年第6期8卷 386-393页

作者： Anne-Sophie Fiolet Elise Jandot Pauline Doucey Coralie Crétet Célia Brunel Christine Pivot jean-Marc Ghigo christophe Beloin David Lebeaux Fabrice Pirot Service Pharmaceutique Plateforme FRIPHARM Groupe Hospitalier Centre Edouard Herriot Hospices Civils de Lyon Unité de Génétique des Biofilms Département de Microbiologie Institut Pasteur Service de Microbiologie Unité Mobile de Microbiologie Clinique Assistance Publique-H?pitaux de Paris H?pital Européen Georges Pompidou Université Paris Descartes 12 rue de l'Ecole de Médecine Laboratoire de Recherche et Développement de Pharmacie Galénique Industrielle UMR 5305 Plateforme FRIPHARMF-69373 Faculté de Pharmacie Université Claude Bernard Lyon 1 8 avenue Rockefeller

A lock solution composed of gentamicin sulfate(5 mg/mL) and ethylenediaminetetraacetic acid disodium salt(EDTA-Na2, 30 mg/mL) could fully eradicate in vivo bacterial biofilms in totally implantable venous access ports(TIVAP). In this study, fabrication, conditioning and sterilization processes of antimicrobial lock solution(ALS) were detailed and completed by a stability study. Stability of ALS was conducted for12 months in vial(25 °C 7 2 °C, 60% 7 5% relative humidity(RH), and at 40 °C 7 2 °C, RH 75% 7 5%)and for 24 h and 72 h in TIVAP(40 °C 7 2 °C, RH 75% 7 5%). A stability indicating HPLC assay with UV detection for simultaneous quantification of gentamicin sulfate and EDTA-Na2 was developed. ALS was assayed by ion-pairing high performance liquid chromatography(HPLC) needing gentamicin derivatization, EDTA-Na2 metallocomplexation of samples and gradient mobile phase. HPLC methods to separate four gentamicin components and EDTA-Na2 were validated. Efficiency of sterility procedure and conditioning of ALS was confirmed by bacterial endotoxins and sterility tests. Physicochemical stability of ALS was determined by visual inspection, osmolality, pH, and sub-visible particle counting. Results confirmed that the stability of ALS in vials was maintained for 12 months and 24 h and 72 h in TIVAP.

关键词： Gentamicin-EDTA-Na2 loaded antimicrobial lock solution Pharmaceutical compounding Stability indicating HPLC assay method Totally implantable venous access ports

The Production of CNT Flower-Like Structures with 3-Fold and 4-Fold Symmetries on a Pt/Si Substrate

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Advances in Chemical Engineering and Science 2013年第1期3卷 78-81页

作者： Madjid Arab Marjorie David jean-christophe Valmalette christophe Ramseyer Université du Sud Toulon Var IM2NP UMR CNRSLa GardeFrance Université Franche-Comté UELa BouloieBesanconFrance

Carbon nanotubes flower (CNTs-F) films were prepared by catalytic chemical vapor deposition (CVD) on a platinum (Pt) thin layer, supported on a silicon wafer. The products were synthesized from an aerosol composed of ferrocene and toluene, as catalyst and carbon precursor respectively, at 820. The high synthesis temperature induces a modification of a Pt thin layer to a nano-structured island giving rise to the formation of CNTs-F during the following films growth step by CVD process. The suggested mechanism involves the selective diffusion of the catalyst and carbon atoms through the Pt grain boundaries. This results in the appearance of flower-like structures with 3-and 4-fold symmetries.

关键词： Carbon Nanotube Aerosol-CVD 3-Fold and 4-Fold Symmetries Flower Shape

Development of a standardized in vitro approach to evaluate microphysical,chemical,and toxicological properties of combustion-derived fine and ultrafine particles

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Journal of Environmental Sciences 2022年第3期34卷 104-117页

作者： Ana Teresa Juarez-Facio Clement Castilla Cecile Corbiere Helene Lavanant Carlos Afonso christophe Morin Nadine Merlet-Machour Laurence Chevalier jean-Marie Vaugeois Jerome Yon Christelle Monteil Normandie Univ UNIROUENUNICAEN ABTE76000 RouenFrance Normandie Univ UNIROUENINSA RouenCNRSCOBRA76000 RouenFrance Normandie Univ UNIROUENINSA RouenCNRSGPM-UMR663476000 RouenFrance Normandie Univ UNIROUENINSA RouenCNRSCORIA76000 RouenFrance

Ultrafine particles represent a growing concern in the public health community but their precise role in many illnesses is still unknown. This lack of knowledge is related to the experimental difficulty in linking their biological effects to their multiple properties, which are important determinants of toxicity. Our aim is to propose an interdisciplinary approach to study fine(FP) and ultrafine(UFP) particles, generated in a controlled manner using a mini CAST(Combustion Aerosol Standard) soot generator used with two different operating conditions(CAST1 and CAST3). The chemical characterization was performed by an untargeted analysis using ultra-high resolution mass spectrometry. In conjunction with this approach, subsequent analysis by gas chromatography–mass spectrometry(GC–MS) was performed to identify polycyclic aromatic hydrocarbons(PAH). CAST1 enabled the generation of FP with a predominance of small PAH molecules, and CAST3 enabled the generation of UFP, which presented higher numbers of carbon atoms corresponding to larger PAH molecules. Healthy normal human bronchial epithelial(NHBE) cells differentiated at the air-liquid interface(ALI) were directly exposed to these freshly emitted FP and UFP. Expression of MUC5AC, FOXJ1, OCLN and ZOI as well as microscopic observation confirmed the ciliated pseudostratified epithelial phenotype. Study of the mass deposition efficiency revealed a difference between the two operating conditions, probably due to the morphological differences between the two categories of particles. We demonstrated that only NHBE cells exposed to CAST3 particles induced upregulation in the gene expression of IL-8 and NQO1. This approach offers new perspectives to study FP and UFP with stable and controlled properties.

关键词： In vitro Air-liquid interface MiniCAST Fine and ultrafine particles Organic compounds OC/TC

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含硫铁物料脱硫工艺技术现状

矿产综合利用 2022年第6期43卷 116-123页

作者：罗立群雷严明 Niyonzima jean christophe 武汉理工大学资源与环境工程学院矿物资源加工与环境湖北省重点实验室湖北武汉430070

硫在含铁物料的开发利用中是有害杂质元素,因此需要脱除。本文介绍了含铁物料中硫的来源、产出特征与危害,归纳了以浮选法、焙烧法、浸出法处理含铁物料脱硫的技术现状,介绍了此3种脱硫方法的适用条件、应用特色,并比较了各自的优缺点... 详细信息

硫在含铁物料的开发利用中是有害杂质元素,因此需要脱除。本文介绍了含铁物料中硫的来源、产出特征与危害,归纳了以浮选法、焙烧法、浸出法处理含铁物料脱硫的技术现状,介绍了此3种脱硫方法的适用条件、应用特色,并比较了各自的优缺点。展望未来含硫铁物料脱硫研究与发展方向,指出浮选法需合理选择磨选流程和药剂制度,注重铜离子复合活化剂、黄药类组合捕收剂提高浮选脱硫指标;焙烧法根据含硫矿物组成和热力学性质选择合适的焙烧炉型、筛选适宜的热工制度;生物浸出应结合多形态硫元素的迁移演变特征,培育良性高效菌种、实施短周期高效浸出,以实现高效脱硫。

关键词：含铁物料脱硫黄铁矿氧化焙烧生物浸出