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Geochemical characterization of the metasedimentary rocks of the Yaounde Group within the southernmost North Equatorial tectonic belt:insights into geodynamic evolution

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Acta Geochimica 2023年第6期42卷 1017-1034页

作者： Simon pierre Mbola Ndzana Moise Christian Balla Ateba Germain marie Monespérance Mboudou Moussa Nsangou Ngapna jean paul Sep Nlongang Solange Ipan Moise Bessong jean Bosco Olinga Joseph Mvondo Ondoa Sébastien Owona paul Bilong Department of Earth Sciences Faculty of ScienceUniversity of YaoundéIP.O.Box:812Yaounde´Cameroon Institute for Geological and Mining Research P.O.Box:4110NlongkakYaounde´Cameroon Department of Earth Sciences Faculty of ScienceUniversity of DoualaP.O.Box:24157DoualaCameroon Department of Geology Faculty of ScienceThe University of BueaP.O.Box:67BueaCameroon

the proterozoic metasedimentary rocks of the Yaounde Group on the northern edge of the Congo Shield in Central Africa were investigated to understand their provenance and depositional ***,geochemistry,and field evidence helped to subdivide the metasediments into paragneiss,mica schist,chlorite schist,and quartzite which were derived from greywacke,shale,quartz arenite,litharenite *** are immature with some mature samples,moderately weathered and reworked Neo-and post-Archean *** earth element signatures(Chondrite Eu/Eu^(*)≤1),enrichment of light rare earth elements over the heavy ones,and the La/Sc ratio(>0.7)are compatible with those of the intermediate and felsic sources from the upper continental *** metasediments were deposited in the continental arc setting and have evolved during proterozoic times according to the Wilson cycle to form the West Gondwana including NE Brazil.

关键词： West Gondwana North Equatorial orogenic belt Yaounde Group Neoproterozoic basin Geochemistry of metasedimentary rocks Geodynamic evolution

Risk behaviours associated with HIV and AIDS among couples in Rwamiko Sector, Gicumbi District, Rwanda

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Life Research 2023年第3期6卷 59-65页

作者： jean marie Vianney tuyisenge Erigene Rutayisire Environmental Compliance and enforcement Rwanda Environment Management AuthorityKigaliRwanda Department of public Health School of Health SciencesMount Kenya UniversityKigali CampusKigaliRwanda

Background:Risk behaviours have been linked to the spread of the Human Immunodeficiency Virus(HIV)epidemic in both urban and rural *** the progress made in the fight against HIV,it remains a public health concern *** behaviours such as not using condoms,having multiple sexual partners,and engaging in early sexual activity increase the risk of HIV ***,it is important to assess these risk behaviours and understand the relationship between different factors and HIV,specifically among couples,in order to better understand the dynamics of the *** main objective of this study was to assess risk behaviours for HIV and AIDS among couples in Rwamiko sector,Gicumbi District,and suggest appropriate interventions for this ***:this cross-sectional survey aimed to assess associated HIV and AIDS risk behaviours among couples in Rwamiko Sector,Gicumbi District,in order to determine the dynamics of the epidemic in this group and suggest appropriate *** was collected using a self-administered questionnaire and a multistage cluster random sampling *** collected data was then computed,analyzed,and presented in the form of tables and *** statistics were used to analyze all *** logistic regression was used to calculate odds ratios and 95%confidence intervals(CI)to investigate the relationship between the assessed factors,such as independent and dependent *** association between the studied factors was described using odds ratios with 95%***:the majority of respondents were in the age group of 30-39 *** respondents were married,and approximately 45%had completed primary *** majority of respondents were *** reported receiving HIV information from multiple sources,including radio,tV,films,school,church,health workers,parents,and *** findings of this study showed that some participants had knowledge about HIV transmis

关键词： Risk Behaviour Couples Rwamiko Sector Gicumbi District

ELECtRONIC StRUCtURE OF pOLYMERS:FROM QUANtUM tHEORY tO AppLICAtIONS

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ELECTRONIC STRUCTURE OF POLYMERS:FROM QUANTUM THEORY TO APPL...

Spinal cord injury reprograms muscle fibroadipogenic progenitors to form heterotopic bones within muscles

40th IUpAC Congress

作者： jean-marie André University of Namur Laboratory for applied theoretical chemistry

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Bone Research 2022年第2期10卷 310-325页

作者： Hsu-Wen tseng Dorothée Girard Kylie A.Alexander Susan M.Millard Frédéric torossian Adrienne Anginot Whitney Fleming Jules Gueguen marie-Emmanuelle Goriot Denis Clay Beulah Jose Bianca Nowlan Allison R.pettit Marjorie Salga François Genêt marie-Caroline Le Bousse-Kerdilès Sébastien Banzet jean-pierre Lévesque Mater Research Institute-the University of Queensland WoolloongabbaQLDAustralia Institut de Recherche Biomédicale des Armées(IRBA) INSERM UMRS-MD1197 ClamartFrance INSERM UMRS-MD 1197 Universitéde Paris-SaclayHôpital Paul BrousseVillejuifFrance INSERM UMS-44 Universitéde Paris-SaclayHôpital Paul BrousseVillejuifFrance UpOH(Unitépéri Opératoire du Handicap Perioperative Disability Unit)Physical and Rehabilitation Medicine departmentRaymond-PoincaréHospitalAssistance Publique-Hôpitaux de Paris(AP-HP)GarchesFrance Universitéde Versailles Saint Quentin en Yvelines UFR Simone Veil-SantéEND:ICAP INSERM U1179Montigny le BretonneuxFrance

the cells of origin of neurogenic heterotopic ossifications(NHOs), which develop frequently in the periarticular muscles following spinal cord injuries(SCIs) and traumatic brain injuries, remain unclear because skeletal muscle harbors two progenitor cell populations: satellite cells(SCs), which are myogenic, and fibroadipogenic progenitors(FAps), which are mesenchymal. Lineage-tracing experiments using the Cre recombinase/Lox p system were performed in two mouse strains with the fluorescent protein Zs Green specifically expressed in either SCs or FAps in skeletal muscles under the control of the pax7 or prrx1 gene promoter, respectively. these experiments demonstrate that following muscle injury, SCI causes the upregulation of pDGFRα expression on FAps but not SCs and the failure of SCs to regenerate myofibers in the injured muscle, with reduced apoptosis and continued proliferation of muscle resident FAps enabling their osteogenic differentiation into NHOs. No cells expressing Zs Green under the prrx1 promoter were detected in the blood after injury, suggesting that the cells of origin of NHOs are locally derived from the injured muscle. We validated these findings using human NHO biopsies. pDGFRα+mesenchymal cells isolated from the muscle surrounding NHO biopsies could develop ectopic human bones when transplanted into immunocompromised mice, whereas CD56+myogenic cells had a much lower potential. therefore, NHO is a pathology of the injured muscle in which SCI reprograms FAps to undergo uncontrolled proliferation and differentiation into osteoblasts.

关键词： progenitor injuries muscles

Why Creating a Nuclear Services Company in China

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Why Creating a Nuclear Services Company in China

pharmacological properties and related constituents of stem bark of pterocarpus erinaceus poir.(Fabaceae)

《中国和法国的核能现状与展望》研讨会

作者： jean-marie ALLENE

this presentation has been prepared in co-operation beetweenMM Zheng Dong Shan Deputy General Manager of Daya Bay Nuclear OperationMaintenance Management Company, Fan Qun Xin General Manager of ChinaNuclear Industry 23 Construction Corporation and jean-marie Allene, Areva,Nuclear Services Business Development General Manager in China

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Asian pacific Journal of tropical Medicine 2012年第1期5卷 46-51页

作者： Ouedraogo Noufou Sawadogo Richard Wamtinga tibiri Andre Bayet Christine Lompo Marius Hay A Emmanuelle Koudou jean Dijoux marie-Genevieve Guissou Innocent pierre Departement de medecine-pharmacopee traditionnelle/pharmacie(IRSS/CNRSt) 03 Bp 7192 Ouagadougou 03 Burkina Faso Laboratoire de pharmacologie et toxicologie UFR/SDSUniversite de Ouagadougou 03 BP 7021 Ouagadougou 03Burkina Faso Universite de Lyon F-69622LyonFrance Universite Lyon I Villeurbanne CNRS UMR 5557Ecologie MicrobienneISPB69373 LyonFrance Laboratoire de chimie des substances naturelles Faculte des SciencesUniversite de Bangui.BP908Bangui.Republique Centrafricaine Departement de medecine-pharmacopee traditionnelle/pharmacie(IRSS/CNRSt) 03 Bp 7192 Ouagadougou 03 Burkina Faso Laboratoire de pharmacologie et toxicologieUFR/SDSUniversite de Ouagadougou 03 BP 7021 Ouagadougou 03Burkina Faso

Objective:to sereen methanol and dichloromethane extracts of stem bark of pterocarpus erinaceus for anti-inflammatory,*** vitro antioxidant activities and phytochemical ***:Anti-inflammatory activity was detcrmined by using carrageenan inducededema of mice paw and croton oil-induced edema of mice ear:analgesic effect was evaluated using acetic acid-induced *** screening of extracts was performed by thin layer *** chromatographic fractionation led to the isolation of main active components as *** and *** structures were established hy tLC and nuclear magnetic resonance ***:Both methanol and dichloromethane extracts, *** and epicatechin showed a significant anti—inflammatory effect using croton oil induced—ear ***,the action of dichloroinethane extract was more important. At the doses of 100 and 200 mg/*** methanol extract was able to reduce the carrageeuan induced-hind paw edema,while al the doses of 100.200 and 400 mg/*** showed an important analgesic effect against writhing induced by acetic acid injection of 38.8%.68.0%and 74.3%, *** properties of methanol extract and its dichloromethane and ethyl acetate fractions were assessed by using the 1,1—diphenyl—2—picrylhydrazyl *** methanol extract showed the stronger radical scavenging activity than dichloromethane and ethyl acetate fractions,with an antiradical power of 5.3.5 and 2 *** main components isolated from these extracts as friedelin,lupeol and epicathechin were responsible of these ***:the results suggest that the stem hark extracts of pterocarpus erinaceus possessed important *** activities and strong antioxidant properties, therefore,they could he used as natural potential ingredients for pharma ceutical industry.

关键词： pterocarpus erinaceus phytochemical Anti-inflammatory Analgesic Antioxidant

End-to-End performance Evaluation of tCp traffic under Multi-Queuing Networks

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International Journal of Communications, Network and System Sciences 2016年第6期9卷 219-233页

作者： jean marie Garcia Mohamed El Hedi Boussada Services and Architectures for Advanced Networks LAAS-CNRS University of Toulouse CNRS Toulouse France Mobile Network and Multimedia SUP’COM Ariana Tunisia

While Internet traffic is currently dominated by elastic data transfers, it is anticipated that streaming applications will rapidly develop and contribute a significant amount of traffic in the near future. therefore, it is essential to understand and capture the relation between streaming and elastic traffic behavior. In this paper, we focus on developing simple yet effective approximations to capture this relationship. We study, then, an analytical model to evaluate the end-to-end performance of elastic traffic under multi-queuing system. this model is based on the fluid flow approximation. We assume that network architecture gives the head of priority to real time traffic and shares the remaining capacity between the elastic ongoing flows according to a specific weight.

关键词： Flow-Level Modelling Multi-Queuing Network Quality of Service Streaming traffic Elastic traffic

Low-k integration: Gas screening for cryogenic etching and plasma damage mitigation

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Frontiers of Chemical Science and Engineering 2019年第3期13卷 511-516页

作者： Romain Chanson Remi Dussart thomas tillocher p. Lefaucheux Christian Dussarrat jean Francois de M arneffe IMEC v.z.w. 3001 LeuvenBelgium GREMI/University of Orleans OrleansFrance Air Liquide Laboratories TsukubaJapan

the integration of porous organo-silicate low-k materials has met a lot of technical *** of the main issues is plasma-induced damage,occurring for all plasma steps involved during interconnects *** the present paper,we focus on porous SiOCH low-k damage mitigation using cryogenic temperature so as to enable micro-capillary *** aim is to protect the porous low-k from plasma-induced damage and keep the k-value of the material unchanged,in order to limit the RC delay of interconnexion levels while shrinking the microchip *** cryogenic temperature is used to condense a gas inside the porous low-k ***,the etching process is performed at the temperature of condensation in order to keep the condensate trapped inside the material during the *** the first part of this work,the condensation properties of several gases are screened,leading to a down selection of five ***,their stability into the porous structure is evaluated at different *** of them are used for plasma damage mitigation *** mitigation is effective and shows negligible damage for one of the gases at-50℃.

关键词： low-A nanotechnology micro-electronics cryo-etching plasma processing

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