检索结果-南通市图书馆

Jour.al of.Envir.nmental Sc.enc.s 2013年第8期25卷 1618-1625页

作者： A. marinoni P. c.1}stof.nelli P. Laj r. Duc.i D. Puter. f. c.lzolar. T. c. Landi E. Vuiller.oz M. Maione P. Bonasoni Institute f.r.Atmospher.c.Sc.enc.s and c.2}te National Research Council of Italy Labor.toir. de Glac.ologie et Géophysique de l'Envir.nnement Université Grenoble 1 CNRS EV-K2-c.r.c.mmittee Ur.ino Univer.ity DiSBeF

To study the inf.uenc. of.polluted air.mass tr.nspor. c.r.ying ozone （O3） and blac. c.r.on （Bc. in the high Himalayas, sinc. marc. 2006 the Nepal c.6}te Obser.ator. at Pyr.mid （Nc.-P） GAW-WMO global station （Nepal, 5079 m a.s.l.） is oper.tive. Dur.ng the f.r.t 5-year.measur.ments, the O3 and Bc.c.nc.ntr.tions have shown a mean value of.48 ± 12 ppb （± standar. deviation） and 208 ± 374 ng/m3, r.spec.ively. Both O3 and Bc.showed well def.ned seasonal c.c.es with maxima dur.ng pr.-monsoon （O3 ： 61.3 ± 7.7 ppbV; Bc. 444 ± 433 ng/m3） and minima dur.ng the summer.monsoon （O3 ： 40.1 ± 12.4 ppbV; Bc. 64 ± 101 ng/m3）. The analysis of.the days c.ar.c.er.sed by the pr.senc. of.a signif.c.nt Bc.inc.0}ase with r.spec. to the typic.l seasonal c.c.e identif.ed 156 days af.ec.ed by ＂ac.te＂ pollution events, c.r.esponding to 9.1% of.the entir. data-set. Suc. events mostly oc.ur.in the pr.-monsoon per.od, when the O3 diur.al var.ability is str.ngly r.lated to the tr.nspor. of.polluted air.mass r.c. on Bc. On aver.ge, these ＂ac.te＂ pollution events wer. c.ar.c.er.sed by dr.matic.inc.0}ases of.Bc.（352%） and O3 （29%） levels c.mpar.d with the r.maining days.

关键词： ozone blac. c.r.on Himalayas pollution biomass bur.ing tr.pospher.

f.ll-band er.or.c.ntr.l and c.0}c.-f.0}e sur.ac. f.br.c.tion tec.niques f.r.ultr.-pr.c.sion f.y c.tting of.lar.e-aper.ur. KDP c.0}stals

在线全文

学校读者我要写书评

暂无评论

f.0}ntier. of.Mec.anic.l Engineer.ng 2017年第2期12卷 193-202页

作者： f. H. ZHANG S. f. WANG c. H. AN J. WANG Q. XU depar.ment of.Mec.anic.l Engineer.ng Harbin Institute of TechnologyHarbin 150001 China c.engdu f.ne Optic.l Engineer.ng r.sear.h c.nter Chengdu 610041China

Lar.e-aper.ur. potassium dihydr.gen phos- phate （KDP） c.0}stals ar. widely used in the laser.path of.iner.ial c.nf.nement f.sion （Ic.） systems. The most c.mmon method of.manuf.c.ur.ng half.meter.KDP c.0}stals is ultr.-pr.c.sion f.y c.tting. When pr.c.ssing KDP c.0}stals by ultr.-pr.c.sion f.y c.tting, the dynamic.c.ar.c.er.stic. of.the f.y c.tting mac.ine and f.uc.uations in the f.y c.tting envir.nment ar. tr.nslated into sur.ac. er.or. at dif.er.nt spatial f.0}quenc. bands. These mac.in- ing er.or. should be suppr.ssed ef.ec.ively to guar.ntee that KDP c.0}stals meet the f.ll-band mac.ining ac.ur.c. spec.f.ed in the evaluation index. In this study, the anisotr.pic.mac.inability of.KDP c.0}stals and the c.uses of.typic.l sur.ac. er.or. in ultr.-pr.c.sion f.y c.tting of.the mater.al ar. investigated. The str.c.ur.s of.the f.y c.tting mac.ine and existing pr.c.ssing par.meter. ar. optimized to impr.ve the mac.ined sur.ac. quality. The f.ndings ar. theor.tic.lly and pr.c.ic.lly impor.ant in the development of.high-ener.y laser.systems in c.ina.

关键词： ultr.-pr.c.sion f.y c.tting lar.e-aper.ur. KDP c.0}stals spatial f.0}quenc. pr.c.ssing er.or

Spec.es of.Lasiodiplodia assoc.ated with mango in Br.zil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

f.ngal Diver.ity 2013年第4期61卷 181-193页

作者： marília W.marques Nelson B.lima marc.s Antônio de Mor.is Jr.maria Angélic. G.Bar.osa Br.no O.Souza Sami J.Mic.er.f. Alan J.L.Phillips marc.s P.S.c.mara depar.amento de Agr.nomia Universidade Federal Rural de Pernambuco52171-900 RecifeBrazil depar.amento de Genétic. Universidade Federal de Pernambuco50732-970 RecifeBrazil Embr.pa Semi-Ár.do 56302-970 PetrolinaBrazil c.ntr. de r.c.r.os Mic.0}biológic.s Departamento de Ciências da VidaFaculdade de Ciências e TecnologiaUniversidade Nova de Lisboa2829-516 CaparicaPortugal

Mango(Mangif.r. indic.)is a major.tr.pic.l f.0}it spec.es c.ltivated in *** objec.ive of.this study was to identif. spec.es of.Lasiodiplodia assoc.ated with diebac. and stem-end r.t of.mango in the semi-ar.d r.gion of.Nor.heaster. Br.zil,and c.mpar. the spec.es in r.lation to myc.lial gr.wth,pathogenic.ty and vir.lenc..A total of.120 isolates of.Lasiodiplodia wer. used and identif.c.tions wer. made using a c.mbination of.mor.hology and phylogenetic.analysis based on par.ial tr.nslation elongation f.c.or.1-αsequenc.(Ef.-α)and inter.al tr.nsc.0}bed spac.r.(ITS).The f.llowing spec.es wer. identif.ed:Lasiodiplodia c.0}ssispor.,***,***,***,***,*** and Lasiodiplodia sp..Lasiodiplodia theobr.mae was the most f.0}quently isolated spec.es,whic. r.pr.sented 41%of.all the *** this spec.es had been pr.viously r.por.ed on mango in Br.zil,while the other.spec.es r.pr.sent the f.r.t r.por. assoc.ated with mango tr.e diseases in this *** c.0}ssispor. is r.por.ed f.r.the f.r.t time assoc.ated with mango diseases *** wer. signif.c.nt dif.er.nc.s in myc.lial gr.wth r.tes among the Lasiodiplodia spec.es and also in the optimum temper.tur. f.r.*** spec.es of.Lasiodiplodia wer. pathogenic.on mango *** wer. signif.c.nt dif.er.nc.s in vir.lenc. among the spec.es,wher.in *** and Lasiodiplodia *** the most vir.lent,while the least vir.lent wer. ***,***,*** and ***.

关键词： Botr.osphaer.ac.ae Mangif.r. indic. ITS Ef.-α Phylogeny Vir.lenc.

c.r.ent tr.nding and beyond f.r.solar.dr.ven water.splitting r.ac.ion on WO_(3)photoanodes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Jour.al of.Ener.y c.emistr. 2022年第10期31卷 88-113,I0003页

作者： Magno B.c.sta Moisés A.de Ar.újo marc.s V.de lima Tinoc. Juliana f.de Br.to Luc.a H.Masc.r. depar.amento de Químic. Universidade Federal de São CarlosRodovia Washington Luizkm 235São CarlosSão Paulo 13565-905Brazil Instituto de Químic. de São c.r.os Universidade de São PauloAvenida Trabalhador Sancarlense400São CarlosSão Paulo 13566-590Brazil Instituto de Químic. Universidade Estadual PaulistaRua Professor Francisco Degnis/nAraraquaraSão Paulo 14800-900Brazil

This r.view shows the impor.anc. of.WO_(3)photoanode as a potentially low-c.st,ef.ic.ent,stable,and photoac.ive mater.al f.r.light-dr.ven water.*** suc.,this manusc.0}pt aims to r.view the most r.c.nt public.tions r.gar.ing the str.tegies to impr.ve the phoelec.r.ac.ivity of.WO_(3)f.lms f.r.water.*** addition,this r.view aims to gr.phic.lly highlight and disc.ss the gener.l tr.ndings of.the photoc.r.ent density r.sponse and stability test of.the r.c.nt outstanding studies in the liter.tur. f.r.photoelec.r.c.emic.l water.splitting *** str.tegies c.ver.d in this r.view will not only c.nc.r. the WO_(3)mor.hology and c.0}stal plane gr.wth,but also the many ar.angements possibilities to impr.ve the WO_(3)ef.ic.enc. f.r.water.photoelec.r.oxidation,suc. as def.c. engineer.ng based on oxygen vac.nc.es,doping,dec.r.tions,and homo and *** these str.tegies ar. c.mpar.d by the photoc.r.ent density r.sults and by the stability of.these *** best r.sults in this sense wer. obser.ed in c.ses wher. the use of.heter.junc.ion was applied together.with a desir.d mor.hology and c.0}stal plane of.the WO_(3)***,the modif.c.tions that c.used a dec.0}ase in the photoc.r.ent density r.ac.ing values that ar. even lower.than the pur. WO_(3)wer. also *** this way,this r.view intends to impr.ve the knowledge about the synthesis and design of.WO_(3)photoanodes to f.r.her.obtain an ef.ic.ent photoc.talyst to minimize the r.c.mbination losses or.losses ac.0}ss the inter.ac.s and impr.ve the photoelec.r.ac.ivity f.r.water.splitting in the lar.e-sc.le applic.tion.

关键词： Solar.ener.y H_(2)pr.duc.ion N-type semic.nduc.or Photoelec.r.de design Oxygen evolution r.ac.ion

Evaluation of.str.ss intensity f.c.or. f.r.bi-mater.al inter.ac. c.0}c.s using displac.ment jump methods

在线全文

学校读者我要写书评

暂无评论

Ac.a Mec.anic. Sinic. 2017年第6期33卷 1051-1064页

作者： K. c. Nehar.B. E. Hac.i f. c.zes M. Haboussi Labor.toir. de développement en méc.nique et matér.aux (LDMM) Université de Djelfa PB 3117 Djelfa Algeria Labor.toir. des Sc.enc.s des Pr.c.dés et des Matér.aux (LSPM) UPR 3407 CNRS Université Paris 13 Paris France

The aim of.the pr.sent wor. is to investigate the numer.c.l modeling of.inter.ac.al c.0}c.s that may appear.at the inter.ac. between two isotr.pic.elastic.mater.als. The extended f.nite element method is employed to analyze br.ttle and bi-mater.al inter.ac.al f.tigue c.0}c. gr.wth by c.mputing the mixed mode str.ss intensity f.c.or.(SIf.. Thr.e dif.er.nt appr.ac.es ar. intr.duc.d to c.mpute the SIf.. In the f.r.t one, mixed mode SIf.is deduc.d f.0}m the c.mputation of.the c.ntour.integr.l as per.the c.assic.l J-integr.l method,wher.as a displac.ment method is used to evaluate the SIf.by using either.one or.two displac.ment jumps loc.ted along the c.0}c. path in the sec.nd and thir. appr.ac.es. The displac.ment jump method is r.ther.c.assic.l f.r.mono-mater.als,but has to our.knowledge not been used up to now f.r.a bimater.al. Henc., use of.displac.ment jump f.r.c.ar.c.er.zing bi-mater.al c.0}c.s c.nstitutes the main c.ntr.bution of.the pr.sent study. Sever.l benc.mark tests inc.uding par.metr.c.studies ar. per.or.ed to show the ef.ec.iveness of.these c.mputational methodologies f.r.SIf.c.nsider.ng static.and f.tigue pr.blems of.bi-mater.al str.c.ur.s. It is f.und that r.sults based on the displac.ment jump methods ar. in a ver. good agr.ement with those of.exac. solutions, suc. as f.r.the J-integr.l method, but with a lar.er.domain of.applic.bility and a better.numer.c.l ef.ic.enc.(less time c.nsuming and less spur.ous boundar. ef.ec.).

关键词： Bi-mater.al inter.ac. c.0}c. Mixed mode str.ss intensity f.c.or Displac.ment jump X-f.M f.tigue c.0}c. gr.wth

Antibiotic. r.sistanc. Patter. and Plasmid Pr.f.ling of.<i>Edwar.siella tar.a</i>Isolated f.1}m <i>Heter.br.nc.us longif.lis</i>

在线全文

学校读者我要写书评

暂无评论

Jour.al of.Biosc.enc.s and Medic.nes 2018年第4期6卷 95-105页

作者： f. c. Ogbonne E. r. Ukazu f. c. Egbe Niger.an Institute f.r.Oc.anogr.phy and marine r.sear.h Lagos Nigeria

A study was c.r.ied out to investigate antibiotic.r.sistanc. patter.s and plasmid pr.f.ling of.Edwar.siella tar.a isolated f.1}m f.r.ed-c.ltur.d Heter.br.nc.us longif.lis in Lagos State, Southwest of.Niger.a. A total of.44 Edwar.siella isolates wer. r.c.ver.d f.1}m 80 f.sh samples c.llec.ed f.1}m the 10 f.sh f.r.s using selec.ive r.ndom str.tif.c.tion. It was obser.ed that Edwar.siella tar.a isolates wer. 100% r.sistant to Amoxic.llin, c.lor.nphenic.l, Levof.oxac.n, Str.ptomyc.n and 90% r.sistant to Nalidixic.Ac.d r.spec.ively. All the isolates wer. 100% susc.ptible to Spec.inomyc.n and c.pr.f.oxac.n, while Of.oxac.n, Gentamyc.n, and Pef.oxac.n var. in their.level of.susc.ptibility with 90%, 80% and 70% sensitivity r.spec.ively. c.nver.ely, 8 out of.10 f.sh f.r. loc.tions studied wer. obser.ed to have antibiotic.r.sistant str.ins, and 5 out of.8 dr.g-r.sistant str.ins wer. f.und to c.r.y plasmid and the sizes of.the plasmid r.nges between 20.027 kb to 23.130 kb. The plasmid af.er.tr.atment with mitomyc.n c.and ethidium br.mide wer. lost dur.ng the pr.c.ss of.plasmid c.r.ng c.nf.r.ing that the multiple dr.g r.sistant exhibited by the isolates was plasmid mediated. Ther. ar. f.wer.studies on antibiotic.r.sistanc. in Edwar.siella tar.a f.1}m aquac.ltur. enter.r.ses and this study pr.vides f.r.her.suppor. to the view that ther. is a potential r.sk of.tr.nsf.r.of.r.sistant bac.er.a and their.genes to human pathogen thr.ugh the f.od c.ain. Although, in Niger.a ther. is no antibiotic.pr.duc. r.gister.d f.r.aquac.ltur. usage, yet f.sh f.r.er. use them of.-label f.r.bac.er.al diseases pr.vention.

关键词： Edwar.siella tar.a Plasmid Pr.f.ling Antibiotic r.sistanc. Heter.br.nc.us longif.lis

NUMEr.c.L SIMULATION Of.TEMPEr.TUr. f.ELD ON f.ASH BUTT WELDING f.r.HIGH MANGANESE STEELS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ac.a Metallur.ic. Sinic.(English Letter.) 2005年第4期18卷 547-551页

作者： B.D. Yu W.D. Song f. c. Zhang c.ina r.ilway Shanhaiguan Br.dge Gr.up Limited c.mpany Shanhaiguan 066205 China c.llege of.Mater.als Sc.enc. and Engineer.ng Yanshan University Qinhuangdao 066004 China

An axial symmetr. f.nite element model c.upled with elec.r.c.ty-ther.al ef.ec. was developed to study the temper.tur. f.eld distr.bution in pr.c.ss of.the f.ash butt welding （f.W） of.f.0}g highmanganese steel. The inf.uenc. of.temper.tur. dependent mater.al pr.per.ies and the c.ntac. r.sistanc. wer. taken into ac.ount in f.M ＇simulation. Meanwhile, the lost mater.als due to .splutter.was r.solved by using bir.h and death element. The r.sult of.analyzing data shows that the moddel in the f.W f.ashing is r.asonable and f.asible, and c.n exac.ly simulate the temper.tur. f.eld distr.bution. The modeling pr.vides r.f.r.nc. f.r.analysis of.welding tec.nologies on the temper.tur. f.eld of.high-manganese steel in f.W.

关键词： f.ash butt welding (f.W) numer.c.l simulation high manganese steel,temper.tur. f.eld

c.0}stal-or.ented wr.nkles with or.gami-type junc.ions in f.w-layer.hexagonal bor.n nitr.de

在线全文

学校读者我要写书评

暂无评论

Nano r.sear.h 2015年第5期8卷 1680-1688页

作者： c.milla K. Oliveir. Egleidson f. A. Gomes mariana c. Pr.do Thonimar V. Alenc.r.r.giane Nasc.mento Leandr. M. Malar. r.naldo J. c. Batista Alan B. de Oliveir. Helio c.ac.am Ana M. de Paula Ber.ar.o r. A. Neves depar.amento de f.sic. ICEx Universidade Federal de Minas Gerais - UFMG C.P. 702 30123-970 - Belo Horizonte Brazil depar.amento de f.sic. ICEB Universidade Federal de Ouro Preto - UFOP 35400-000 - Ouro Preto Brazil

Under.tanding layer.inter.lay is the key to utilizing layer.d heter.str.c.ur.s f.r.ed by the stac.ing of.dif.er.nt two-dimensional mater.als f.r.devic. applic.tions. Bor.n nitr.de has been demonstr.ted to be an ideal substr.te on whic. to build gr.phene devic.s with impr.ved mobilities. Her. we pr.sent studies on the mor.hology and optic.l r.sponse of.annealed f.w-layer.hexagonal bor.n nitr.de f.akes deposited on a silic.n substr.te that r.veal the f.r.ation of.linear.wr.nkles along well-def.ned c.0}stallogr.phic.dir.c.ions. The wr.nkles f.r.ed a networ. of.pr.marily thr.ef.ld and oc.asionally f.ur.old or.gami-type junc.ions thr.ughout the sample, and all thr.ef.ld junc.ions and wr.nkles f.r.ed along the ar.c.air.c.0}stallogr.phic.dir.c.ion. f.r.her.or., molec.lar.dynamic. simulations yielded, thr.ugh spontaneous symmetr. br.aking, wr.nkle junc.ion mor.hologies that ar. c.nsistent with both the exper.mental r.sults and the pr.posed or.gami-f.lding model. Our.f.ndings indic.te that this mor.hology may be a gener.l f.atur. of.sever.l two-dimensional mater.als under.pr.per.str.ss-str.in c.nditions, r.sulting in dir.c. c.nsequenc.s in devic. str.in engineer.ng.

关键词： hexagonal bor.n nitr.de 2D mater.als wr.nkles or.gami f.lding annealing

c.ar.c.er.zation of.yttr.a-stabilized zir.onia f.lms deposited by dip-c.ating on La_(0.7)Sr.(0.3)MnO_(3) substr.te:Inf.uenc. of.synthesis par.meter.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Jour.al of.Advanc.d c.r.mic. 2013年第1期2卷 55-62页

作者： Jac.ueline c.marr.r. Nielson f.P.r.BEIr. c.lia f.MALf.TTI mariana M.V.M.SOUZA Esc.la de Químic.-Univer.idade f.der.l do r.o de Janeir.(Uf.2}) Centro de TecnologiaBloco Esala 206Ilha do FundãoCEP 21941-909Rio de JaneiroRJBrazil depar.amento de Metalur.ia Universidade Federal do Rio Grande do Sul(UFRGS)Campus do ValeSetor 4Prédio 75Sala 234CEP 91501-970Porto AlegreRSBrazil

Yttr.a-stabilized zir.onia(YSZ,Zr._(2)-8%Y2O_(3))f.lms wer. deposited onto lanthanum str.ntium manganite(LSM,La_(0.7)Sr.(0.3)MnO_(3))substr.tes using dip-c.ating pr.c.ss aiming f.r.the applic.tion in solid oxide f.el c.lls(SOf.7}).YSZ pr.c.r.or.was pr.par.d by sol-gel method;thr.e values of.the or.anic.inor.anic.c.nc.ntr.tion r.tio(1,3 and 5)wer. utilized and the sol visc.sity was adjusted(60 mPa·s and 100 mPa·s)bef.r. deposition on the *** inf.uenc. of.these synthesis par.meter. on the str.c.ur. and mor.hology of.the deposited f.lms was examined by X-r.y dif.r.c.ion(Xr.)and sc.nning elec.r.n mic.0}sc.py(SEM).The f.lms showed c.ar.c.er.stic.peaks of.LSM,YSZ(with c.bic.str.c.ur.)and sec.ndar. phases of.Sr.r._(3) and La_(2)O_(3).depending on the synthesis c.nditions,c.0}c.-f.0}e,homogeneous and well adher.d f.lms wer. obtained,with thic.ness of.11-24μm.

关键词： YSZ f.lms LSM sol-gel dip-c.ating

GAS SOr.TION AND Tr.NSPOr. IN POLY (PHENYLENE OXIde)(PPO)AND Ar.L-Br.MINATED PPO MEMBr.NES

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

c.inese Jour.al of.Polymer.Sc.enc. 1989年第4期7卷 306-314页

作者：贾连达 f. r. SHEU r.T.c.Er. H.B.HOPf.NBEr. c.angc.un Institute of.Applide c.emistr. Academia SinicaChangchunPRC depar.ment of.c.emic.l Engineer.ng North Carolina State UniversityRaleighNC 27695USA

The appar.nt solubility (S), c.nc.ntr.tion-aver.ge dif.usivity (D), and per.eability (P), f.r.c._2, c._4 and N_2 thr.ugh PPO and ar.l-br.minated PPO at 35℃ f.r.pr.ssur. r.nging f.0}m 1 to 26 atm ar. r.por.ed. It is f.und that P, D, and S of.the membr.nes to all the thr.e gases var. with the extent of.br.mination. S inc.0}ases with the inc.0}ase of.the per.ent of.br.mine in eac. c.se, but D to c._2 inc.0}ases r.markably only at higher.degr.e of.br.minaf.on, and ther.f.r., P to c._2 is inc.0}ased by mor. than 100% over.a wide r.nge of.r.ssur. in the c.se. The solubility data ar. well desc.0}bed by the dual mode sor.tion model. It is f.und that the gas molec.les sor.ed by the Langmuir.mode ar. r.latively mor. immobilized and the c.ntr.bution of.the nonequilibr.nm c.ar.c.er.of.the polymer.to gas per.eation inc.0}ases obviously f.r.c._2 and is har.ly c.anged f.r.c._4 with inc.0}asing br.mine c.ntent. These obser.ations ar. inter.r.ted in ter.s of.c.anges in spec.f.c.f.0}e volume (Sf.)and the c.hesive ener.y density (c.D) of.the polymer..

关键词： Poly (Phenylene Oxide) (PPO) Br.mination Membr.ne Per.eability.