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An ICT model for increased adoption of farm input information in developing countries:A case in Sikasso,Mali

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Information Processing in Agriculture 2019年第1期6卷 26-46页

作者： Macire Kante Robert Oboko Christopher Chepken University of Nairobi P.O.Box 30197-00100 GPONairobiKenya centre national de la recherche scientifique et technologique BamakoMali

Information and Communication Technologies(ICT)play a key role in the dissemination of information on farm inputs for their increased ***-scale cereal farmers have been exposed to ICT-based farm input information in developing ***,an underuse of these ICTs services has led to an insignificant adoption of farm input *** underuse was due to certain *** purpose of this study was to propose an ICT model for increased adoption of farm input information by establishing these factors and their relationships.A convenient sample of 300 small-scale cereal farmers was selected in Sikasso,Mali to gather *** partial least squares structural equation modelling technique was used to assess the model that was being *** used the technique to establish the measurement model validity and to assess the structural model(hypotheses).The result suggested that the model was highly predictive of the Use of ICT-based farm input information(80.7%).In addition,use of these ICT-based farm input information was also highly predictive(68.4%)of the Increased Adoption of farm input information by small-scale cereal farmers in developing countries.

关键词： Cereal farmers Productivity ICT-based farm input information developing countries Mali

Variation of CH_4 concentrations recorded in Dunde ice core bubbles

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Chinese Science Bulletin 1999年第4期44卷 383-384页

作者： J. Chappellaz laboratoire de Glaciologie et Geophysique de I'Environnement centre national de la recherche scientifique

GREENHOUSE gases such as CH4 in the ancient atmospheric concentration can be reconstructed by extracting and analyzing the gases trapped in polar ice core bubbles. It is a new attempt to extract and analyze the CH4 concentration in Dunde ice core for the study of mountain glacier. Samples were taken from the about 140-m ice core drilled in 1987 in Dunde ice cap in Qilian Mountain. The ice core has been well preserved in cold room. 12 samples were taken from the upper 95 m, and cut to 15 cm in length and 5cm in diameter. CH4 concentrations were measured in CNRS laboratory of Glaciology, Grenoble, France.

关键词： core Variation of CH4 concentrations recorded in Dunde ice core bubbles CH

The High Light Response and Redox Control of Thylakoid FtsH Protease in Chlamydomonas reinhardtii

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Molecular Plant 2017年第1期10卷 99-114页

作者： Fei Wang Yafei Qi Alizee Malnoe Yves Choquet Francis-Andre Wollman Institut de Biologie Physico-Chimique Unite Mixte de Recherche 7141 Centre National de la Recherche Scientifique/Universite Pierre et Marie Curie Paris 75005 France

In Chlamydomonas reinhardtii, the major protease involved in the maintenance of photosynthetic machinery in thylakoid membranes, the FtsH protease, mostly forms large hetero-oligomers （-1 MDa） comprising FtsH1 and FtsH2 subunits, whatever the light intensity for growth. Upon high light exposure, the FtsH subunits display a shorter half-life, which is counterbalanced by an increase in FTSH1/2 mRNA levels, resulting in the modest upregulation of FtsH1/2 proteins. Furthermore, we found that high light increases the protease activity through a hitherto unnoticed redox-controlled reduction of intermolecular disulfide bridges. We iso- lated a Chlamydomonas FTSH1 promoter-deficient mutant, ftsh1-3, resulting from the insertion of a TOC1 transposon, in which the high light-induced upregulation of FTSH1 gene expression is largely lost. In ftsh1- 3, the abundance of FtsH1 and FtsH2 proteins are loosely coupled （decreased by 70% and 30%, respectively） with no formation of large and stable homo-oligomers. Using strains exhibiting different accumulation levels of the FtsH1 subunit after complementation of ftsh1-3, we demonstrate that high light tolerance is tightly correlated with the abundance of the FtsH protease. Thus, the response of Chlamydomonas to light stress involves higher levels of FtsH 1/2 subunits associated into large complexes with increased proteolytic activity.

关键词： chloroplast protease regulation of gene expression photoinhibition Chlamydomonas reinhardtii

Role of the ejaculatory bulb in biosynthesis of the male pheromone cis-vaccenyl acetate in Drosophila melanogaster

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Integrative Zoology 2007年第2期2卷 89-99页

作者： Gaëlle GUIRAUDIE-CAPRAZ Dang Ba PHO Jean-Marc JALLON UnitéMixte de recherche Universitéde Paris-Sud et centre national de la recherche scientifique n°8620 University of Paris SudOrsayFrance

In Drosophila melanogaster,the male ejaculatory bulb is the site of synthesis of a male-specific pheromone,cis-vaccenyl acetate,which functions as both an attractant and an *** long monounsaturated acetate is structurally similar to a number of shorter gland-synthesized moth *** cell monolayer that forms the Drosophila male ejaculatory bulb wall is responsible for the production and secretion of cis-vaccenyl acetate into the seminal *** dissected bulbs were incubated with sodium[14-C]-acetate(or deuterated acetate),a labeled acetate ester was *** labeled acetate ester co-migrated with cis-vaccenyl acetate in thin layer *** of the abdomens of males from which the ejaculatory bulbs had been removed,or the abdomens of females,with radiolabeled acetate did not yield any acetate ester,but did yield other lipid products,including *** the isolated labeled acetate ester was hydrolyzed,no radioactive vaccenol was *** strongly suggests that the acetyl group is incorporated via a transacetylation reaction,but that the vaccenyl moiety is not synthetized in the *** transacetylation enzyme activity was localized in the microsomal subfraction of the bulb homogenate,and its affinity for vaccenol was not very different from that reported for monounsaturated alcohol substrates in moths.

关键词： cis-vaccenyl acetate Drosophila melanogaster ejaculatory bulb male pheromone microsomes transacetylation

Heat Transfer in a Forced Wall Jet on a Heated Rough Surface

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Journal of Thermal Science 2000年第1期9卷 85-92页

作者： Marie-Francoise Scibilia Lemfi - centre national de la recherche scientifique Campus Universitaire

In this paper, an experimental investigation of a Iaminar wall jet in the presence of a heated wall with stationary particles on its surface, is reported. The wall jet was submitted to external acoustic vibrations amplifying the coherent structures appearing in the laminar region. A wind tunnel was used at very low Reynolds number. Mean velocity and turbulence intensity were measured by a constant temperature anemometer. Measurements were taken in the transition and turbulent regions. Embedded particles were outside the viscous sublayer and it was observed that their presence modifies significantly the flow characteristics in particular the boundary layer is thickened. This study can bring a better understanding of the structure of a flow when it is heated and forced on a rough wall.

关键词： heat transfer turbulence boundary layer wall jet roughness acoustics.

Associations between physical activity levels and ATPase inhibitory factor 1 concentrations in older adults

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Journal of Sport and Health Science 2024年第3期13卷 409-418页

作者： Jérémy Raffin Yves Rolland Annelise Genoux Guillaume Combes Mikael Croyal Bertrand Perret Sophie Guyonnet Bruno Vellas laurent O.Martinez Philipe de Souto Barreto For the MAPT/DSA Group Institut du Vieillissement Gérontopôle de ToulouseCentre Hospitalo-Universitaire de ToulouseToulouse 31000France centre d'Epidémiologie et de recherche en Santédes Populations UnitéMixte de Recherche 1295Institut National de la Santéet de la Recherche MédicaleUniversitéToulouse-III-Paul-SabatierToulouse 31000France LimitAging Team Institut des Maladies Métaboliques et CardiovasculairesUnitéMixte de Recherche 1297Institut National de la Santéet de la Recherche MédicaleUniversitéToulouse III-Paul SabatierToulouse 31432France Service de Biochimie Pôle de biologieHôpital de PurpanCentre Hospitalo-Universitaire de ToulouseToulouse 31300France L'Institut du Thorax Institut National de la Santéet de la Recherche MédicaleCentre National de la Recherche ScientifiqueCentre Hospitalo-Universitaire de NantesNantes UniversitéNantes 44000France BioCore US16Structure Fédérative de Recherche BonamyInstitut National de la Santéet de la Recherche MédicaleCentre National de la Recherche ScientifiqueCentre Hospitalo-Universitaire de NantesNantes UniversitéNantes 44000France Plate-forme de spectrométrie de masse Centre de Recherche en Nutrition HumaineOuestNantes 44000France 不详

Background:Adenosine triphosphatase inhibitory factor 1(IF1)is a key protein involved in energy ***1 has been linked to various agerelated diseases,although its relationship with physical activity(PA)remains ***,the apolipoprotein A-I(apoA-I),a PA-modulated lipoprotein,could play a role in this relationship because it shares a binding site with IF1 on the cell-surface ATP *** examined here the associations between chronic PA and plasma IF1 concentrations among older adults,and we investigated whether apoA-I mediated these ***:In the present work,1096 healthy adults(63.8%females)aged 70 years and over who were involved in the Multidomain Alzheimer Prevention Trial study were ***1 plasma concentrations(square root of ng/mL)were measured at the 1-year visit of the Multidomain Alzheimer Prevention Trial,while PA levels(square root of metabolic equivalent task min/week)were assessed using questionnaires administered each year from baseline to the 3-year *** linear regressions were performed to investigate the associations between the first-year mean PA levels and IF1 *** analyses were conducted to examine whether apoA-I mediated these *** linear regressions were carried out to investigate whether the 1-year visit IF1 concentrations predicted subsequent changes in ***:Multiple linear regressions indicated that first-year mean PA levels were positively associated with IF1 concentrations(B=0.021;SE=0.010;p=0.043).Mediation analyses revealed that about 37.7%of this relationship was mediated by apoA-I(B_(ab)=0.008;SE=0.004;p=0.023).Longitudinal investigations demonstrated that higher concentrations of IF1 at the 1-year visit predicted a faster decline in PA levels over the subsequent 2 years(time×IF1:B=0.148;SE=0.066;p=0.025).Conclusion:This study demonstrates that regular PA is associated with plasma IF1 concentrations,and it suggests that apoA-I partly med

关键词： Aging Apolipoprotein Bioenergetics Exerkine Mitochondria

Low-dimensional catalysts for oxygen reduction reaction

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Progress in Natural Science:Materials International 2020年第6期30卷 787-795页

作者： Xin Tong Xinxing Zhan Diane Rawach Zhangsen Chen Gaixia Zhang Shuhui Sun School of Chemistry and Material Science Guizhou Normal University Institut national de la recherche scientifique INRS Centre énergie Matériaux et Télécommunications

developing highly efficient electrocatalysts to facilitate the sluggish cathodic oxygen reduction reaction(ORR) is a key challenge for high-performance fuel cells. Low-dimensional materials have attracted great attention recently because of their unique structure and properties. In this review, the application of zero-dimensional(0 D),one-dimensional(1 D), and two-dimensional(2 D) materials in ORR are discussed and particular attention is given to the relationship between their structure and the ORR activity. Graphene-based materials, transition metal dichalcogenides, transition metal oxide, nanotubes, nanoribbons, nanowires, and single-atom ORR catalysts are introduced and classified by their geometric dimension.

关键词： Oxygen reduction reaction Low-dimensional catalysts Graphene Transition metal dichalcogenides Transition metal oxide Single-atom catalyst

Construire une question de recherche dans l’interdisciplinarité Building an Interdisciplinary Research Question

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Psycho-Oncologie 2024年第2期18卷 79-85页

作者： Elsa Bansard MSH Paris Saclay Centre national de la recherche scientifiqueGif-sur-Yvette91190France

Interdisciplinarity is strongly promoted by institutions and is the subject of abundant scientific publications on its history,definition,and typologies,as well as on its obstacles and *** article aims to provide insight into the development of an interdisciplinary research *** will present the path that led from an administrative management question to a doctorate in philosophy of medicine on supportive care,thanks to a rich collaboration between a wide range of academic,hospital,and association *** analysis of the literature will show how the long history of science underpins disciplinary issues in the development of a research *** method will make visible the long dialogue between the partners in this *** results will show how the research question evolved throughout the ***,the discussion will propose three concepts to put interdisciplinarity into perspective:collaboration,attention,and tranquility.

关键词： Interdisciplinarity humanities and social sciences supportive care oncology

4.2K直流背景场下Bi2223超导带材的交流损耗

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稀有金属材料与工程 2003年第9期32卷 769-772页

作者：胡立发 A.Sulpice E.Mossang 李成山纪平吴怡芳冯勇张平祥周廉西北有色金属研究院 CRTBT of centre national de la recherche scientifique Grenoble France CRTBT of centre national de la recherche scientifique LCMI of centre national la recherche scientifique

研究了Bi2223高温超导带材在4.2K和外加直流背景场条件下的交流损耗。讨论了磁场、电流、基体电阻率、超导芯的数目等因素对交流损耗的影响。所有的测量都在4.2K下进行,外加磁场的幅值最大是5T,损耗的测量采用传输电流法。

关键词： Bi2223 交流损耗临界电流直流磁场