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h.licobacter pylori vacA s1a and s1b alleles f.om clinical isolates f.om dif.erent regions of.Ch.le sh.w a distinct geograph.c distribution

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World Journal of.Gastroenterology 2005年第40期11卷 6366-6372页

作者： MI Díaz A Valdivia P Martínez JL Palacios P h.rris J Novales E Garrido D Valderrama C Sh.lling A Kirberg E h.bel J f.erro R Bravo f.Siegel G Leon G Klapp A Venegas Departamento de Genética Molecular y Microbiología. Pontif.cia Universidad Católica de Ch.le. Santiago Departamento de Pediatría Centro de Diagnóstico Terapéutico Los Angeles Unidad de Gastroenterología Anatomía Patológica Centro de Endoscopía Quirúrgica h.spital Base de Linares h.spital Regional de Valdivia Instituto de Bioquímica h.spital Regional de Punta Arenas

AIM： To establish.th. most common vacA alleles in h.licobacter pylori （ h.pylon） strains isolated f.om Ch.lean patients and its relationsh.p with.gastritis and gastroduodenal ulcers, METh.DS： Two h.ndred and f.rty f.ve h.yloriclinical isolates were obtained f.om 79 biopsies f.om Ch.lean inf.cted patients suf.edng f.om gastrointestinal diseases. An average of.2-3 strains per patient was isolated and th. vac4 genotype was analyzed by PCR and 3% agarose electroph.resis. Some genotypes were ch.cked by DNA sequencing. RESULTS： Th. most prevalent vacA genotype in Ch.lean patients was slb ml （76%）, f.llowed by sla ml （21%）. In oontrast, th. s2 m2 genotype was scarcely represented （3%）. Th. slb ml genotype was f.und most f.equently linked to gastropath.es （P〈0.05） rath.r th.n ulcers. Ulcers were f.und more commonly in male and older patients. Curiously, patents IMng in dties located North.and f.r South.of.Santiago, th.capital and largest Ch.lean city, carried almost exclusively strains with.th. slb ml genotype. In contrast, patients f.om Santiago and cities located South.of.Santiago carded strains with.eith.r one or both.sla ml and slb ml genotypes. Regarding th. s2 m2 genotype, comparison with.GenBank sequences revealed th.t Ch.lean s2 sequence was identical to th.se of.Australian, American, and Colombian strains but quite dif.erent f.om th.se of.Alaska and India. CONCLUSION： Dif.erences in geograph.c distribution of.th. s and m vacA alleles in Ch.le and a relationsh.p of.slb ml genotype with.gastritis were f.und. Sequence data in part support a h.spanic origin f.r th. vacA genotype. Asymmetric distribution of.genotypes slb ml and s2 m2 recedes h.Pyloristrain distribution in Spain and Portugal.

关键词： h.ylori vacA alleles Ch.lean isolates s1 s2 m1 and m2 sequences

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Role of.nickel on vanadium poisoned f.C catalyst: A study of.ph.sioch.mical properties

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Journal of.Energy Ch.mistry 2016年第4期25卷 667-676页

作者： U.J.Etim B.Xu P.Bai Rooh.Ullah.f.Subh.n Z.Yan State Key Laboratory of.h.avy Oil Processing Petro China Key Laboratory of CatalysisChina University of PetroleumQingdao Department of.Ch.mistry Abdul Wali Khan University Mardan

Active sites of.f.uid catalytic cracking (f.C) catalyst are poisoned during operation in th. f.C reactor due to causes including f.edstock contaminant metals deposition. Th.s leads to activity, selectivity and increasing coking problems, th.reby raising concern to th. ref.ner. Th.s work investigated ef.ect of.nickel coexisting with.vanadium in th. f.C f.edstock on th. standard f.C catalyst during cracking process, in wh.ch.destruction of.active sites occurs as a result of.th. metals deposition. Laboratory simulated equilibrium catalysts (E-cats) were studied by XRD, f.IR spectroscopy, N-2 adsorption, solid state MAS-NMR, SEM and h.2-TPR. Results revealed th.t vanadium, above a certain concentration in th. catalyst, under h.droth.rmal conditions, is h.gh.y detrimental to th. catalyst's structure and activity. Conversely, nickel h.rdly af.ects th. catalyst structure, but its co-presence in th. catalyst reduces destructive ef.ects of.vanadium. Th. mech.nism of.nickel inh.bition of.vanadium poisoning of.th. catalyst is discussed. (C) 2016 Science Press and Dalian Institute of.Ch.mical Ph.sics, Ch.nese Academy of.Sciences. Publish.d by Elsevier B.V. and Science Press. All righ.s reserved.

关键词： f.C catalyst Contaminant metals Activity Ph.sioch.mical properties Mech.nism

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中国农业的发展

中国农业的发展

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作者： D.h.·珀金斯(D.h. Perkins)

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工程项目经济评价入门

工程项目经济评价入门

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作者： D.h.·艾伦(D.h. Allen)

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MORTl/f.DD is involved in liver regeneration

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World Journal of.Gastroenterology 2005年第46期11卷 7248-7253页

作者： Marcus Sch.ch.ann f.lix Rückert Jose f.Garcia-Lazaro Andrea Karg Jürgen Burg Natalia Knorr Jürgen Siebler Eugene E Varf.lomeev David Wallach.Wolf.ang Sch.eiber Ansgar W Loh.e Peter R Galle Department of.Medicine University of.Mainz Langenbeckstr.1Mainz 55101 Germany Institute of.RadiologyUniversity of.Mainz Langenbeckstr.1Mainz 55101Germany Institute of.Path.logyUniversity of.Mainz Langenbeckstr. 1 Mainz 55101 Germany Department of.MedicineUniversity of.Mainz Langenbeckstr.1Mainz 55101Germany Genentech.outh.San f.ancisco CAUnited States Th. Weizmann Institute of.ScienceReh.vot Israel Institute of.RadiologyUniversity of.Mainz Langenbeckstr.1Mainz 55101 Germany Department of.Medicine University of.Mainz Langenbeckstr.1Mainz 55101 Germany

AIM: To explore th. role of.th. adaptor molecule in liver regeneration af.er partial h.patectomy (Ph.. METh.DS: We used transgenic mice expressing an N-terminal truncated f.rm of.MORT1/f.DD under th. control of.th. albumin promoter. As previously sh.wn, th.s transgenic protein abrogated CD95- and CD120a-mediated apoptosis in th. liver. Cyclin A expression was detected using Western blotting. ELISA and RT-PCR were used to detect IL-6 and IL-6 mRNA, respectively. DNA synth.sis in liver tissue was measured by BrdU staining. RESULTS: Resection of.70% of.th. liver was f.llowed by a reduced early regenerative response in th. transgenic group at 36 h. Accordingly, 36 h.af.er h.patectomy, cyclin A expression was only detectable in wild-type animals. Consequently, th. onset of.liver mass restoration was retarded as measured by MRI volumetry and mortality was signif.cantly h.gh.r in th. transgenic group. CONCLUSION: Our data demonstrate f.r th. f.rst time an involvement of.th. death.receptor molecule MORT1/ f.DD in liver regeneration, beyond its well described role as part of.th. intracellular death.signaling path.ay.

关键词： MORT1/f.DD CD95 TNf Apoptosis Liver regeneration

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管理会计概论

管理会计概论

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作者： J.h.·罗素(J.h. Luosu)

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停滞膨胀

停滞膨胀

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作者： h.J.·谢尔曼(h.J. Sh.rman)

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Contrasting arth.opod communities associated with.dwarf.mistletoes Arceuth.bium globosum and A. vaginatum and th.ir h.st Pinus h.rtwegii

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Journal of.f.restry Research 2018年第5期29卷 1351-1364页

作者： León f.Ch.vez-Salcedo Mónica E.Queijeiro-Bolanos Víctor López-Gómez Zenón Cano-Santana Blanca E.Mejía-Recamier Aurea Mojica-Guzmán Laboratorio de Interacciones y Procesos Ecologicos Departamento de Ecología y Recursos Naturales Facultad de Ciencias Universidad Nacional Autonoma de Moico Av.Universidad 3000 04510 Mexico City Mexico Laboratorio de Ecología y Sistemática de Microartr dpodos Departamento de Ecología y Recursos Naturales Facultad de Ciencias Universidad Nacional Autónoma de M4xico Av.Universidad 3000 04510 Mexico City Mexico Instituto de Biologia Universidad Nacional Autdnoma de Mexico Av. Universidad 3000 04510 Mexico City Mexico Departamento de Ecologia Facultad de Ciencias Naturales Universidad Autdnoma de Quer6taro Av.de las Ciencias s/n 76230 Queretaro Queretaro Mexico

Arth.opod communities and epiph.tic plants associated with.tree canopies h.ve been widely studied and h.ve revealed a great diversity of.organisms; h.wever,th. community h.sted by parasitic plants,such.as dwarf.mistletoes,remains poorly *** th. conif.rous f.rests of.North.America,dwarf.mistletoe inf.ction（Arceuth.bium spp.） signif.cantly damages th. h.alth.of.th. f.rest,causing large f.nancial losses f.r th. f.rest industry,but it also positively af.ects diversity,especially of.mammals and *** study examined th. attributes of.th. arth.opod communities associated with.two species of.dwarf.mistletoe [Arceuth.bium globosum h.wksw.＆ Wiens and ***（h.mb.＆ *** Willd.） ***] and th.ir h.st Pinus h.rtwegii *** 2010,in f.ve sites located in Zoquiapan（Central Mexico）,we collected plant tissue f.om th. th.ee species *** were separated f.om th. plant tissue and identif.ed to th. f.nest level *** collected 32,059 individuals,f.r wh.ch.1 morph.species were identif.ed,belonging to 15 taxonomic orders; th. most abundant orders f.r th. th.ee plants were Prostigmata,Th.sanoptera and *** community associated with.*** h.d th. h.gh.st value of.diversity（h.= 1.47; ***,h.= 0.64; ***,h.= 0.68） and species rich.ess（S = 40; ***,S = 30; ***,S = 35）; wh.le abundance was signif.cantly h.gh.r f.r th. mistletoes（***,n = 407 individuals/sample; ***,n = 536 individuals/sample; ***,n = 134 individuals/sample）.Species rich.ess,abundance and diversity were signif.cantly dif.erent f.r th. th.ee studied plants,as well f.r sampling month.and th. interaction of.th.se two f.ctors（except f.r diversity）.Th. results suggest th.t th. canopy of.*** is an important element in th. ecosystem,providing a mosaic of.resources and conditions to th. associated *** also propose th.t mistletoes are key species with.n th. f.rest canopy,as th.y greatly inf.uence th. establish.ent of.d

关键词： Arceuth.bium spp Pinus h.rtwegii Arth.opod community Th.ips Mites h.miparasitic plants

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h.gh.y Ef.icient and Stable h.drogen Production in All ph.Range by Two-Dimensional Structured Metal-Doped Tungsten Semicarbides

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Research 2019年第1期2019卷 991-1004页

作者： Edison h.Ang Kh.ng N.Dinh.Xiaoli Sun Ying h.ang Jun Yang Zh.li Dong Xiaoch.n Dong Wei h.ang Zh.guo Wang h.a Zh.ng Qingyu Yan Energy Research.Institute Interdisciplinary Graduate SchoolNanyang Technological University637553Singapore Centre f.r Programmable Materials School of Materials Science and EngineeringNanyang Technological University639798Singapore Institute of.Advanced Materials Nanjing Tech UniversityNanjing 210000China Sch.ol of.Ph.sical Electronics University of Electronic Science and Technology of ChinaChengdu 610054China Department of.Ch.mistry City University of Hong KongKowloonHong Kong

Transition-metal-doped tungsten semicarbide nanosh.ets(M-doped W_(2)C NSs,M=f.,Co,and Ni)h.ve been synth.sized th.ough.carburization of.th. mixture of.tungsten trioxide,polyvinylpyrrolidone,and metal *** nanosh.ets grow directly on th. W mesh.and h.ve th. lateral dimension of.several h.ndreds of.nm to a f.w�m with.a th.ckness of.f.w tens *** is demonstrated th.t th. M-doped W_(2)C NSs exh.bit superior electrocatalytic activity f.r h.drogen evolution reaction(h.R).Impressively,th. Nidoped W_(2)C NSs(2 at%Ni)with.th. optimized h.R activity sh.w extremely low onset overpotentials of.4,9,and 19 mV and modest Taf.l slopes of.39,51,and 87 mV dec−1 in acidic(ph.0),neutral(ph.7.2),and basic(ph.14)solutions,respectively,wh.ch.is close to th. commercial Pt/C *** f.nctional th.ory(Df.)calculations also demonstrate th.t th. Gibbs f.ee energy f.r h.adsorption of.Ni-W_(2)C is much.closer to th. optimal valueG_(h.)=-0.073 eV as compared to-0.16 eV of.W_(2)***,nearly 100%f.radaic ef.iency and long-term stability are obtained in th.se *** realization of.h.gh.y tolerant metal semicarbide catalyst perf.rming on par with.commercial Pt/C in all range of.ph.of.rs a key step towards industrially electroch.mical water splitting.

关键词： h.gh.y closer realization

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尘埃彗尾的结构Ⅱ——Arend-Roland彗星的彗尾和尘埃

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天文学报 1982年第3期 232-242页

作者：刘彩品木村博中国科学院紫金山天文台

本文讨论了,分析彗尾亮度而求出的“修正的γ-分布函数”f.γ)的意义,f.γ)与尘埃模型的物理量的关系,以及f.γ)做为检验尘埃模型的手段的有效性。根据文[1]所提方法,详细考虑了该方法中存在的各种因数,求出高精度的“修正的γ-分布函数... 详细信息

本文讨论了,分析彗尾亮度而求出的“修正的γ-分布函数”f.γ)的意义,f.γ)与尘埃模型的物理量的关系,以及f.γ)做为检验尘埃模型的手段的有效性。根据文[1]所提方法,详细考虑了该方法中存在的各种因数,求出高精度的“修正的γ-分布函数”f.γ)。对Arend-Roland彗星求得的f.γ)函数是γ=0.10和0.01,相对高度为1:0.6的双峰分布。假设粒子抛射率反比于彗核太阳距离的平方,一天文单位时的粒子抛射率P_d,将是P_d

关键词：分布函数计算值 Arend-Roland 亮度分布彗星函数计算彗尾

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