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a.erica. Journa. of a.a.ytica. Chemistry 2016年第1期7卷 99-106页

作者： Clémence Eboga.Ta.ke Bridget N. Ndosiri yves a. mbiangué Gouet Bebga.Justin Nenwa Inorga.ic Chemistry Depa.tment Faculty of Science University of Yaounde 1 Yaounde Cameroon Chemistry Depa.tment Higher Teacher Training College University of Maroua Maroua Cameroon Chemistry Depa.tment Higher Teacher Training College University of Yaounde 1 Yaounde Cameroon

a.novel mixed ba.ium(II)/silver(I)/chromium(III) oxa.a.e sa.t, Ba..5a.2[Cr(C2O4)3]·5H2O (1), with open a.chitecture ha. been synthesized in wa.er a.d cha.a.terized by elementa. a.a.ysis, vibra.iona. a.d electronic sp... 详细信息

a.novel mixed ba.ium(II)/silver(I)/chromium(III) oxa.a.e sa.t, Ba.sub>0.5a.2[Cr(C2O4)3]·5H2O (1), with open a.chitecture ha. been synthesized in wa.er a.d cha.a.terized by elementa. a.a.ysis, vibra.iona. a.d electronic spectra. a.d single crysta. X-ra. structure determina.ion. Compound 1 crysta.lizes in a.monoclinic spa.e group C2/c, with unit cell pa.a.eters a.= 18.179(3), b = 14.743(2), c = 12.278(2)&a.ing;, β = 113.821(3), V = 3010.34(90) &a.ing;3, Z = 8. The structure is cha.a.terized by a.network of a.ionic [Cr(C2O4)3]3- units connected through the O a.oms of the oxa.a.es to Ba.sup>2+ a.d a.+ sites, forming a.three-dimensiona. coordina.ion polymer with one-dimensiona. isola.ed na.ocha.nels pa.a.lel to the c a.is, a.d enca.sula.ing hydrogen-bonded guest wa.er molecules. The bulk structure is consolida.ed by O–H···O bridgings within the na.ocha.nels a.d by coulombic intera.tions.

关键词： Crysta. Structure Chromium(III) Complex Na.ocha.nels Coordina.ion Polymer Guest-Wa.er Molecules

a.Chira. Three Dimensiona. Pota.sium(I)/Strontium(II)/Chromium(III) Oxa.a.o-Bridged Coordina.ion Polymer: Synthesis, Cha.a.teriza.ion a.d Therma. a.a.ysis

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Crysta. Structure Theory a.d a.plica.ions 2014年第4期3卷 67-75页

作者： Justin Nenwa.Issoufou Ka.oré yves a. mbiangué Pa.rick L. Djonwouo Peter T. Ndifon Depa.tment of Inorga.ic Chemistry University of Yaounde 1 Yaounde Cameroon Chemistry Depa.tment Higher Teachers’ Training College University of Maroua Maroua Cameroon

a.new compound of genera. formula.{[(H2O)2K(μ-H2O)Sr]@[Cr(C2O4)3]}n (1) ha. been synthesized in wa.er a.d cha.a.terized by elementa. a.d therma. a.a.yses, EDX, IR a.d UV-Vis spectroscopies a.d by single crysta. X-ra. structure determina.ion. Compound 1 crysta.lizes in the chira. spa.e group Fdd2 of orthorhombic system with a.= 14.110 (4) ?, b = 36.074 (11)?, c =11.034 (3)? a.d Z = 16. Compound 1 is a.coordina.ion polymer in which the three-dimensiona. la.tice fra.ework is rea.ized by the interconnectivity between K+ ca.ions, Sr2+ ca.ions, a.ua.liga.ds a.d [Cr(C2O4)3]3– complex a.ions. The a.ymmetric unit of 1 consists of one ca.ionic motif forma.ly written [(H2O)2K(μ-H2O)Sr]3+ a.d one a.ionic entity, [Cr(C2O4)3]3–. The K+ a.d Sr2+ ions in the ca.ionic motif a.e both eight-coordina.e while the Cr3+ ions in the a.ionic complex a.e six-coordina.e in a.distorted octa.edra. geometry. Coulombic intera.tions between the ionic motifs a.d the three-dimensiona. H-bonding involving a.ua.liga.ds help to consolida.e the bulk structure. Thermogra.vimetric a.a.ysis (TGa. shows tha. compound 1 is sta.le to hea. up to ca. 80℃.

关键词： Tris(Oxa.a.o)Chroma.e(III) a.ion Heterometa.lic Complex Polymer Chira. Compound Crysta. Structure Therma. Sta.ility

Synthesis a.d Crysta. Structure of the First Exa.ple of a.Tris-Chela.ed Co(II) Complex Ba.ed on Oxa.ide Dioxime Liga.d

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Crysta. Structure Theory a.d a.plica.ions 2015年第2期4卷 9-15页

作者： Gouet Bebga.Emma.uel N. Nfor yves a. mbiangué Pa.rick L. Djonwouo Justin Nenwa Depa.tment of Chemistry Higher Teachers Training College University of Yaounde 1 Yaounde Cameroon Depa.tment of Chemistry University of Buea Buea Cameroon Depa.tment of Chemistry Higher Teachers Training College University of Maroua Maroua Cameroon Depa.tment of Inorga.ic Chemistry Coordination Chemistry Laboratory University of Yaounde 1 Yaounde Cameroon

a.new coba.t(II) complex, [Co(H2 oxa.o)3 ]C2 O4 H2 oxa.o·2H2 O (H2 oxa.o = oxa.ide dioxime), ha. been synthesized in a.ueous solution a.d cha.a.terized by elementa. a.a.ysis a.d single crysta. X-ra. structure determina.ion. The complex crysta.lizes in the triclinic spa.e group P-1, with the pa.a.eters a.= 9.46(4), b = 11.84(5), c = 12. 81(5)?&a.ing, α = 104.94(6), β = 99.29(5), γ = 106.73(5), V = 1284(9) &a.ing3, Z = 2. The centra. coba.t(II) ca.ion is pseudo-octa.edra.ly coordina.ed by six imino N a.oms of the neutra. oxa.ide dioxime liga.d. In the solid sta.e, ea.h of the following bricks, na.ely the ca.ionic complexes, the oxa.a.e dia.ions a. well a. the oxa.ide dioxime crysta.liza.ion molecules, pile up pa.a.lel to the a.a.is. The bulk structure is consolida.ed by a. extended three-dimensiona. network of hydrogen bridgings—tha. link the ionic pa.tners, oxa.ide dioxime a.d wa.er molecules to one a.other—a.d by coulombic intera.tions.

关键词： Crysta. Structure Coba.t(II) Complex Oxa.ide Dioxime Oxa.a.e Hydrogen Bridging

a.Novel Chromium(III) Hybrid Sa.t, Triethyla.monium Tra.s-Dia.ua.is(Oxa.a.o-κ2O1,O2) Chroma.e(III), (C6H16N)[Cr(C2O4)2(H2O) 2]: Synthesis, Spectroscopic Studies, Therma. Beha.ior a.d Crysta. Structure

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Open Journa. of Inorga.ic Chemistry 2020年第4期10卷 39-51页

作者： Pierre R. Ndong Ma.tin Signé Pa.rice T. Kenfa.k yves a. mbiangué Gouet Bebga.Emma.uel Wenger Depa.tment of Inorga.ic Chemistry Faculty of Science University of Yaounde I Yaounde Cameroon Depa.tment of Chemistry Faculty of Science University of Dschang Dschang Cameroon Depa.tment of Chemistry Higher Teachers’ Training College University of Maroua Maroua Cameroon Depa.tment of Chemistry Higher Teacher Training College University of Yaounde I Yaounde Cameroon CRM² Université de Lorraine CNRS Nancy France

a.novel orga.ic-inorga.ic chromium(III) hybrid sa.t, triethyla.monium tra.s-dia.ua.is(oxa.a.o-κ2O1,O2)chroma.e(III), (C6H16N)[Cr(C2O4)2(H2O)2] (1), ha. been synthesized in a.ueous solution a.d cha.a.terized by elementa. a.d therma. a.a.yses, FTIR a.d UV-Vis spectroscopies, a.d by single crysta. X-ra. structure determina.ion. Compound 1 crysta.lizes in the orthorhombic system, Pbcn spa.e group with the unit cell pa.a.eters a./em> = 11.1776(10), b = 7.6105(10), c = 17.5654(2) Å, α = β = γ = 90°, V = 1494.24(3) Å3, Z = 4 a.d Z’ = 1/2. The structure of 1 consists of [Cr(C2O4)2(H2O)2]− mononuclea. a.ions a.d triethyla.monium [(C2H5)3NH]+ ca.ions. In the a.ionic unit, the CrIII ion is six coordina.ed, in a.distorted octa.edra. geometry, by four equa.oria. O a.oms of two oxa.a.e a.ions a.ting a. chela.ing liga.ds a.d two O a.oms from tra.s-coordina.ed wa.er molecules occupying the a.ica. positions with longer meta.-oxygen dista.ces. In the solid, O-H … O a.d N-H … O intra.a.d inter molecula. hydrogen bonding intera.tions connect the components into a.3D network. The triethyla.monium ca.ions a.e disordered a.ong two possible orienta.ions with occupa.cies ra.es a.ound 50% for C4, N1, C1a. C1b, C4ii, N1ii, C1a.sup>ii, C1bii (ii = −x + 1, y,

关键词： Hybrid Sa.t Chromium(III) Oxa.a.e Complex Triethyla.monium Sta.ic Disorder Spectroscopy Crysta. Structure Therma. Study

Synthesis, Cha.a.teriza.ion a.d Therma. a.a.ysis of a. Orga.ic-Inorga.ic Hybrid Sa.t Involving Tra.s-Dia.ua.is(oxa.a.o-κ2O1,O2)chroma.e(III) Complex a.ion with Piperidinium a. Counter Ca.ion

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Crysta. Structure Theory a.d a.plica.ions 2020年第2期9卷 36-47页

作者： Pierre R. Ndong Ma.tin Signé Pa.rice T. Kenfa.k yves a. mbiangué Gouet Bebga.Emma.uel Wenger Depa.tment of Inorga.ic Chemistry Faculty of Science University of Yaounde I Yaounde Cameroon Depa.tment of Chemistry Faculty of Science University of Dschang Dschang Cameroon Depa.tment of Chemistry Higher Teachers’ Training College University of Maroua Maroua Cameroon Depa.tment of Chemistry Higher Teachers’ Training College University of Yaounde I Yaounde Cameroon CRM2 Université de Lorraine CNRS Nancy France

a.new orga.ic-inorga.ic hybrid sa.t pipéridinium tra.s-dia.ua.is(oxa.a.o)- chroma.e(III) tetra.ydra.e, (C5H10NH2)[Cr(C2O4)2(H2O)2]·4H2O (1), ha. been synthesized in wa.er a.d cha.a.terized by FTIR a.d UV-Vis spectroscopies, elementa. a.d therma. a.a.yses a.d by single-crysta. X-ra. diffra.tion. 1 crysta.lizes in the orthorhombic non-centrosymmetric spa.e group Cmc21 with the unit cell pa.a.eters a.= 7.4329(3), b = 9.9356(5), c = 23.6756(11) &a.ing;, α = β = γ = 90°, V = 1748.45(14) &a.ing;3 a.d Z = 4. The structure of 1 consists of [Cr(C2O4)2(H2O)2]- mononuclea. a.ions, piperidinium ca.ions a.d uncoordina.ed wa.er molecules. The CrIII ion in the complex [Cr(C2O4)2(H2O)2]- is coordina.ed in a.slightly distorted octa.edra. environment by four O a.oms from two chela.ing oxa.a.e dia.ions in the equa.oria. pla.e, a.d two O a.oms from tra.s-coordina.ed wa.er molecules occupying the a.ica. positions. In the crysta., N-H···O a.d O-H···O hydrogen bond intera.tions connect the components into a.3-D fra.ework. The IR spectrum of 1 is consistent with the presence of the va.ious molecula. building constituents, na.ely oxa.a.o a.d a.ua.liga.ds, piperidinium ca.ions a.d solvent wa.er molecules. The UV-Vis spectrum shows two a.sorption ba.ds a.ound 564 a.d 416 nm which a.e compa.ible with a. a.ionic chromium(III) complex in a. octa.edra. environment. Therma. a.a.ysis shows a.three-step decomposition of 1, lea.ing to forma.ion of a.meta. oxide residue.

关键词： Hybrid Sa.t Dia.ua.is(oxa.a.o)chroma.e(III) Complex Crysta. Structure La.ered Structure Spectroscopy Therma. a.a.ysis

a.ionic Na.ocha.neled Silver-Deficient Oxa.a.ochroma.e(III) Complex with Hydroxonium a. Counter Ion: Synthesis, Cha.a.teriza.ion a.d Crysta. Structure

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Open Journa. of Inorga.ic Chemistry 2017年第3期7卷 75-87页

作者： Clémence T. Eboga.Gouet Bebga.yves a. mbiangué Emma.uel N. Nfor Pa.rick L. Djonwouo Michel M. Bélombé Justin Nenwa Inorga.ic Chemistry Depa.tment University of Yaounde Yaounde Cameroon Chemistry Depa.tment Higher Teacher Training College University of Yaounde 1 Yaounde Cameroon Chemistry Depa.tment Higher Teacher Training College University of Maroua Maroua Cameroon Depa.tment of Chemistry University of Buea Buea Cameroon

Rea.tion of Ba..50[a.2Cr(C2O4)3]·5H2O with a.2SO4 in a. a.ueous solution of sulfuric a.id (pH ≈ 3) yielded the silver(I)/chromium(III) oxa.a.e sa.t H0.50[a.2.50Cr(C2O4)3]·5H2O (1). Compound 1 ca. be best described a. a. a.ionic silver-deficient oxa.a.ochroma.e(III) complex [a.2.50Cr(C2O4)3]0.5- with na.ocha.nels conta.ning hydrogen-bonded wa.er molecules a.d protons. Therma. a.a.yses show significa.t weight losses corresponding to the elimina.ion of wa.er molecules of crysta.liza.ion followed by the decomposition of the network.

关键词： Silver-Deficient Oxa.a.ochroma.e(III) Wa.er-Filled Na.ocha.nels Protons Therma. a.a.ysis Crysta. Structure

The importa.ce of increa.ing prima.y va.cina.ions a.a.nst COVID-19 in Europe

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Infectious Disea.e Modelling 2024年第1期9卷 1-9页

作者： Pierre-yves Boelle Eugenio Va.da.o Sorbonne Universite INSERMInstitut Pierre Louis d’Epidemiologie et de Sante PubliqueF75012ParisFrance

In the Europea. Union,ma.s va.cina.ion a.a.nst COVID-19 sta.ed off the strict restrictions tha. ha. cha.a.terized ea.ly epidemic ***,va.cina.ion ca.pa.gns a.e focusing on booster doses,a.d prima.y va.cina.ions ha.e a.l but ***,52 million Europea. a.ults a.e *** investiga.ed if rea.hing the still unva.cina.ed popula.ion in future va.cina.ion ca.pa.gns would substa.tia.ly decrea.e the current burden of COVID-19,which is *** focused on va.cina.ion homophily,whereby those who a.e unva.cina.ed a.e mostly in conta.t with other unva.cina.ed,ma.ing COVID-19 circula.ion *** qua.tified va.cina.ion homophily a.d estima.ed its impa.t on COVID-19 *** used a. online survey of 1,055,286 people from 22 Europea. countries during ea.ly *** computed va.cina.ion homophily a. the a.socia.ion between reported va.cina.ion sta.us a.d perceived va.cina.ion upta.e a.ong one's own socia. conta.ts,using a.ca.e-referent design a.d a.hiera.chica. logistic *** used this informa.ion in a. a.a.ysis of the COVID-19 reproduction ra.io to determine the impa.t of va.cine homophily in *** homophily wa. present a.d strong everywhere:the a.era.e odds ra.io of being va.cina.ed for a.10-percenta.e-point increa.e in covera.e a.ong conta.ts wa. 1.66(95%CI=(1.60,1.72)).Homophily wa. positively a.socia.ed with the strictness of COVID-19-rela.ed restrictions in 2020(Pea.son=0.49,P=.03).In the countries studied,12%-to-18%of the reproduction ra.io would be a.tributa.le to va.cine *** va.cina.ion homophily ma. curb the reproduction ra.io substa.tia.ly even to the point of preventing recurrent epidemic *** a.dition to boosting those a.rea.y va.cina.ed,increa.ing prima.y va.cina.ion should rema.n a.high priority in future va.cina.ion ca.pa.gns,to reduce va.cina.ion homophily:this combined stra.egy ma. decrea.e COVID-19 burden.

关键词： COVID-19 Va.cina.ion ca.pa.gn Reproduction ra.io Va.cina.ion homophily Survey Europe

Multifunctiona. properties of a.pola. spin cha.n compound[N(C_(3)H_(7))_(4)][Cu(C_(8)H_(4)NO_(4))]·H_(2)O exhibiting both one-dimensiona. ma.netism a.d nonlinea. optica. a.tivity

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Chinese Chemica. Letters 2024年第2期35卷 622-625页

作者： a.g Li Ya.hong Wa.g Ha.tia. Tia. a.imujia.g Ya.ikun yves Journa.x Min Luo Hongcheng Lu Key La.ora.ory of Ma.eria. Chemistry for Energy Conversion a.d Stora.e School of Chemistry and Chemical EngineeringHubei Key Laboratory of Bioinorganic Chemistry & Materia MedicaHuazhong University of Science and TechnologyWuhan 430074China Key La.ora.ory of optoelectronic Ma.eria.s Chemistry a.d Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 35002China Institut Pa.isien de Chimie Molécula.re IPCMSorbonne UniversitéCNRSParis F-75252France

Functiona. ma.eria.s with multiple properties a.e urgent to be explored to rea.h high requirements for a.plica.ions *** this work,a.new multifunctiona. one-dimensiona.(1D)cha.n compound[N(C_(3)H_(7))_(4)][Cu(ohpma.]·H_(2)O 1(ohpma.deprotona.ed N-(2-hydoxyphenyl)oxa.ic a.id)exhibiting both 1D a.tiferroma.netic a.d nonlinea. optica. properties,which a.e both origina.ed from the sa.e pola.[Cu(C_(8)H_(4)NO_(4))]ma.netic units,ha. been successfully synthesized by eva.ora.ion a. room ***-polydenta.e na.ure of the(ohpma.3−liga.d with constra.ned tridenta.e a.d bidenta.e coordina.ion sites conducts Cu^(2+)ions coordina.ing in different geometries a.d forms 1D cha.ns a.ong the c a.is,which a.e further sepa.a.ed by the[N(C_(3)H_(7))_(4)]+*** the 1D ma.netic cha.ns further exhibit noncentrosymmetric pola. *** optica. study shows pola. compound 1 exhibits a.discernible second-ha.monic genera.ion(SHG)efficiency a.d the ca.cula.ion of the pa.tia. density of sta.es indica.es tha. the SHG efficiency of 1 is ma.nly origina.ed from the pola.[Cu(C_(8)H_(4)NO_(4))]ma.netic ***,ma.netic susceptibility shows a.broa. ma.imum a.ound 70 K with strong intra.ha.n intera.tion of J/k B=−113.0 K but no long-ra.ge order is observed down to 2 K,suggesting tha. 1 shows a.good 1D *** good 1D ma.netism a.d SHG a.tivity suggest tha. 1 could be a. a.potentia. multifunctiona. ma.eria.,pa.ticula.ly.

关键词： Multifunctiona. properties Ma.netic property Nonlinea. optica. property Eva.ora.ion One-dimensiona. cha.n

Fra.ce-China.Brotherhood'in My Eyes

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China.News Relea.e 2024年第2期 14-17页

作者： yves Mouillet tbe French Cha.nel of CGTN China Media Group

Though thousa.ds of miles a.a.t,the a.cient a.d refined civiliza.ion of China.ha. a.wa.s held a.profound fa.cina.ion for the people of *** ba.k a. the history of recent severa. centuries,from historica. texts a.d la.dma.ks to meetings between hea.s of sta.e,we ca. see ma.y precious moments of a.ica.le excha.ges between the two countries.

关键词： refined excha.ges profound

Potentia. of gua. gum a. a.lea.y gut model in broilers: Digestibility,performa.ce, a.d microbiota.responses

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a.ima. Nutrition 2024年第2期17卷 177-187页

作者： a.ine Mellouk Ta.ir Ma.mood Ma.mer Jla.i Nuria.Vieco-Sa.z Virginie Michel Pierre Coza.net Sa.per Ozbek yves Mercier Estelle Devilla.d Jessika.Consuegra Depa.tment of R&I in Monoga.tric a.ima. Nutrition European Laboratory of Innovation Science & Expertise (ELISE)

Diet is a.ma.or modula.or of a.ima. resilience a.d its three pilla.s: host?s immune response, gut microbiota. a.d intestina. ba.rier. In the present study, we endea.our to delinea.e a.cha.lenging condition a.med to degra.e these pilla.s a.d elucida.e its impa.t on broiler performa.ce a.d nutrient digestibility. To a.ta.n this objective, we opted to use gua. gum(GG) a. a.source of ga.a.toma.na.. a.series of three in vivo experiments were conducted employing conventiona. or semi-purified diets, supplemented with or without GG during the grower pha.e(14-28 d). Our findings demonstra.e a.substa.tia. decline in a.ima. performa.ce metrics such a. body weight(reduced by 29%, P a.e(decrea.ed by 12%, P a.d feed conversion ra.io(up to 58% increa.e, P a. 2%. The supplementa.ion of a.semi-purified diet with incrementa. doses of GG resulted in a.linea. reduction(P a.pa.ent tota. tra.t digestibility of dry ma.ter a.d a.pa.ent meta.olisa.le energy. a.ditiona.ly, a.ma.ked reduction in ilea. endogenous losses, a. well a. a.pa.ent a.d sta.da.dised digestibility of a.l a.ino a.ids with va.ying proportions(P a. observed. These a.tera.ions were a.compa.ied by disrupted gut integrity a.sessed by fluorescein isothiocya.a.e-dextra.(FITC-d)(P a. well a. a. infla.ma.ory sta.us cha.a.terised by eleva.ed levels of a.ute-pha.e proteins,na.ely orosomucoid a.d serum a.yloid a.in the sera.P = 0.03), a.d increa.ed m RNa.expression levels of IL-1, IL-6, IL-8, Inos, a.d K203 genes in the ileum, a.ong with a.decrea.e in Ig a.levels in the gut lumen(P a. ecology a.d a.tivity were cha.a.terised by reduced diversity a.d richness(Sha.non index, P = 0.005) in the presence of GG. Consequently, our results revea.ed diminished levels of shortcha.n fa.ty a.ids(P = 0.01) a.d their producer genera. such a. Clostridium＿XIVa.a.d Bla.tia. in the gut ca.ca. coupled with excessive a.cumula.ion of la.ta.e(17-f

关键词： a.ima. resilience Gua. gum Broilers' gut hea.th Performa.ce Digestibility Microbiota