检索结果-南通市图书馆

Jour.al of Mater.als science & Technology 2011年第1期27卷 15-21页

作者： H.s. Liu b. Zhang G.P. Zhang shenyang National Lab.r.tor. for.Mater.als science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Key Lab.r.tor. for.Anisotr.py and Textur. of Mater.als of Ministr. of Education School of Materials & Metallurgy Northeastern University Shenyang 110004 China

Al/Mg alloy multilayer.d composites wer. pr.duced successfully at the lower.temper.tur.（280 C） b. accumulative r.ll b.nding（Ar.） pr.cessing *** micr.str.ctur.s of Al and Mg alloy layer. wer. char.cter.zed b. scanning electr.n micr.scopy and tr.nsmission electr.n *** har.ness and thr.e-point b.nding tests wer. conducted to investigate mechanical pr.per.ies of the *** is found that Vicker. har.ness,b.nding str.ngth and stiffness modulus of the Al/Mg alloy multilayer.d composite incr.ase with incr.asing the Ar. *** and cr.ck pr.pagation along the inter.ace ar. the two main failur. modes of the multilayer.d composite sub.ected to b.nding *** and fr.ctur. mechanisms of the composite ar. analyzed.

关键词： Accumulative r.ll b.nding(Ar.) Al/Mg alloy multilayer.d composite Ultr.-fine gr.ins Har.ness b.nding pr.per.ies

Localized Cor.osion Char.cter.stics of Nickel Alloys： A r.view

在线全文

学校读者我要写书评

暂无评论

Acta Metallur.ica sinica(English Letter.) 2017年第4期30卷 296-305页

作者： Helmuth sar.iento Klapper.Natalia s. Zador.zne r.ul b. r.b.k Center.for.Mater.als r.sear.h Baker Hughes 29221 CelleGermany Instituto de Mater.ales de Misiones (IMAM) UNaMCONICET 3300 Posadas Argentina GE Glob.l r.sear.h Schenectady NY 12309 USA

Ther. ar. a gr.at var.ety of commer.ial nickel alloys mainly b.cause nickel is ab.e to dissolve a lar.e amount of alloying elements while maintaining a single ductile austenitic phase. Nickel alloys ar. gener.lly designed for.and used in highly aggr.ssive envir.nments, for.example, those wher. stainless steels may exper.ence pitting cor.osion or.envir.nmentally assisted cr.cking. While nickel alloys ar. gener.lly r.sistant to pitting cor.osion in chlor.de-containing envir.nments, they may b. pr.ne to cr.vice cor.osion attack. Addition of chr.mium, molyb.enum and tungsten incr.ases the localized cor.osion r.sistance of nickel alloys. This r.view on the r.sistance to localized cor.osion of nickel alloys includes specific envir.nments such as those pr.sent in oil and gas upstr.am oper.tions, in the chemical pr.cess industr. and in seawater.ser.ice.

关键词： Nickel alloys Localized cor.osion Oil and gas seawater Chemical pr.cess industr.

Influence of the sNPs on the str.ctur.l stab.lity of Cb. pr.tein： Insight fr.m molecular.dynamics simulations

在线全文

学校读者我要写书评

暂无评论

Fr.ntier. in b.ology 2014年第6期9卷 504-518页

作者： C. GEOr.E Pr.YA DOss b. r.JITH r. MAGEsH A. AsHIsH KUMAr Medical b.otechnology Division School of Biosciences and Technology VIT University Vellore-14 TamilNadu India Depar.ment of b.otechnology Faculty of Biomedical Sciences Technology & Research Sri Ramachandra University Chennai-600116 TamilNadu India b.omfor.atlcs Division School of Biosciences and Technology VIT University Vellore-14 TamilNadu lndia

Cystathionine β-synthase is an essential enzyme of the tr.ns-suifur.tion pathway that condenses ser.ne with homocysteine to for. cystathionine. Missense mutations in Cb. ar. the major.cause of inher.ted homocystinur.a, and the detailed effect of disease associated amino acid sub.titutions on the str.ctur. and stab.lity of human Cb. is yet unknown. Her., we apply a unique appr.ach in comb.ning in silico tools and molecular.dynamics simulation to pr.vide str.ctur.l and functional insight into the effect of sNP on the stab.lity and activity of mutant Cb.. In addition, pr.ncipal component analysis and fr.e ener.y landscape wer. used to pr.dict the collective motions, ther.odynamic stab.lities and essential sub.pace r.levant to Cb. function. The ob.ained r.sults indicate that C109r. E176K and D376N mutations have the diver.e effect on dynamic b.havior.of Cb. pr.tein. We found that highly conser.ed D376N mutation, which is pr.sent in the active pocket, affects the pr.tein folding mechanism. Our.str.tegy may pr.vide a way in near.futur. to under.tand and study effects of functional nssNPs and their.r.le in causing homocystinur.a.

关键词： Cb. in silico molecular.dynamics simulation sNPs

study of a collisionless magnetized plasma sheath with nonextensively distr.b.ted species

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma science and Technology 2023年第12期25卷 14-23页

作者： r.PAUL K DEKA G sHAr.A r.MOULICK s ADHIKAr. s s KAUsIK b.K sAIKIA Centr. of Plasma Physics Institute for Plasma ResearchAssam 782402India Institute for.Ener.y Technology Instituttveien 8Kjeller 2007Norway

A weakly magnetized sheath for.a collisionless, electr.negative plasma compr.sing positive ions,electr.ns, and negative ions is investigated numer.cally using the fluid appr.ach. The electr.ns ar. consider.d to b. non-Maxwellian in natur. and ar. descr.b.d b. Tsalli's distr.b.tion. such electr.ns have a sub.tantial effect on the sheath pr.per.ies. The study also r.veals that non-Maxwellian distr.b.tion is the most r.alistic descr.ption for.negative ions in the pr.sence of an ob.ique magnetic field. In addition to the negative ion temper.tur., the sheath potential is also affected b. the nonextensive par.meter.. The pr.sent r.sear.h finds application in the plasma pr.cessing and semiconductor.industr. as well as in space plasmas.

关键词： magnetised plasma sheath electr.negative plasma non-extensive distr.b.tion

Gr.phene-induced Pd nanodendr.tes： A high per.or.ance hyb.0}d nanoelectr.catalyst

在线全文

学校读者我要写书评

暂无评论

Nano r.sear.h 2013年第9期6卷 635-643页

作者： sub.sh Chandr. sahu Aneeya K. samantar.t Ajit Dash r. r. Julur. r.njan K. sahu b. K. Mishr. b.kash Kumar.Jena (1~3) Colloids & Mater.als Chemistr. CSIR-Institute of Minerals and Materials Technology Bhubaneswar-7S I013 India Institute of Physics Bhubaneswar-751005 India Mater.als science and Technology Division National Metallurgical Laboratory Jamshedpur-831007 India

A facile and gr.en appr.ach has b.en developed for.the in situ synthesis of hyb.0}d nanomater.als b.sed on dendr.te-shaped Pd nanostr.ctur.s suppor.ed on gr.phene （r.）. The as-synthesized hyb.0}d nanomater.als （r.-PdnDs） have b.en thor.ughly char.cter.zed b. high r.solution tr.nsmission electr.n micr.scopy, X-r.y photoelectr.n spectr.scop）~ atomic for.e micr.scop）~ r.man spectr.scopy and electr.chemical techniques. The mechanism of for.ation of such dendr.te- shaped Pd nanostr.ctur.s on the gr.phene suppor. has b.en elucidated using tr.nsmission electr.n micr.scopy （TEM） measur.ments. The r. induces the for.ation of, and plays a decisive r.le in shaping, the dendr.te mor.hology of Pd nanostr.ctur.s on its sur.ace. Cyclic voltammetr. and chr.noamper.metr. techniques have b.en employed to evaluate the electr.chemical per.or.ance of r.-PdnDs towar.s oxidation of methanol. The electr.chemical （EC） activities of r.-PdnDs ar. compar.d with gr.phene-suppor.ed spher.cal-shaped Pd nanostr.ctur.s, Pd nanodendr.tes alone and a commer.ial availab.e Pd/C counter.ar.. The comb.ned effect of the gr.phene suppor. and the dendr.te mor.hology of r.-PdnDs tr.gger. the high electr.catalytic activity and r.sults in r.b.st toler.nce to CO poisoning.

关键词： nanodendr.tes r.duced gr.phene methanol oxidation sur.ace poisoning

Computer.simulation of IT-diagr.ms of steel

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料热处理学报 2004年第05B期25卷 706-709页

作者： b. smoljan Faculty of Engineer.ng Materials Science and Engineering Vukovarska 58 51000 Rijeka Croatia

Computer.simulation of austenite decomposition has b.en investigated. The inver.ion method of pr.diction of phase por.ion in steel b.sed on har.enab.lity cur.e of /o/m’/r.-specimen has b.en estab.ished. The designed method of pr.diction austenite decomposition has b.en used in computer.simulation of isother.al tr.nsfor.ation (IT) diagr.m of low alloyed steel. IT-diagr.ms of low alloyed steel can b. successfully pr.dicted b. pr.posed method of computer.simulation.

关键词：计算机模拟奥氏体分解淬火转变图低合金钢

Inter.ace str.ctur. of Ag/snO_2 Nanocomposite Fab.0}cated b. r.active synthesis

在线全文

学校读者我要写书评

暂无评论

Jour.al of Mater.als science & Technology 2010年第1期26卷 49-55页

作者： Jingchao Chen Jing Feng b. Xiao K.H. Zhang Y.P. Du Z.J. Hong r. Zhou Key Lab.r.tor. of Advanced Mater.als of Pr.cious-Nonfer.ous Metals Education Ministry of China and Key Lab of Advanced Materials of Yunnan Province Kunming University of Science and Technology Kunming 650093 China state Key Lab.r.tor. of Mechanical b.havior.of Mater.als School of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 China

The electr.c contact mater.al of Ag/snO2 composite was achieved b. r.active synthesis method. The compositions and micr.str.ctur. of Ag/snO2 composite wer. analyzed and char.cter.zed b. X-r.y diffr.ction （Xr.）, scanning electr.n micr.scopy （sEM）, and high-r.solution electr.n micr.scopy （Hr.EM）. The str.c- tur.l featur. was typical of the par.icle r.infor.ed composites. The Hr.EM images r.vealed that the ob.er.ed Ag/snO2 inter.ace was ab.ence of the pr.cipitated phase and the lattice contr.st acr.ss the inter.ace was clear.and shar.. The aver.ge par.icle size of snO2 in composite was near.50 nm and it was well disper.ed in spher.cal shape. The ther.odynamic mechanism of r.active synthesis method was also discussed. The electr.nic density distr.b.tion analysis of the inter.ace showed the char.es of Ag atoms tr.nsmitted to 0 atoms and the conductivity of the mater.al was also affected. No extr. compounds expected such as AgxOy for.ed at inter.ace. The distr.b.tion of electr.ns was of inequality near.the inter.ace which explained why the mechanical pr.per.y of the metal/cer.mic mater.als was impr.ved b.t the machining pr.per.y declined.

关键词： Metal-matr.x composites Electr.c contact mater.al Inter.ace In situ

Gr.en Tour.sm in Mountain r.gions-r.ducing Vulner.b.lity and Pr.moting People and Place Centr.c Development in the Himalayas

在线全文

学校读者我要写书评

暂无评论

Jour.al of Mountain science 2004年第1期1卷 57-64页

作者： r. b. singh D. K. Mishr. Depar.ment of Geogr.phy Delhi School of Economics University of Delhi Delhi-110007 IndiaDepartment of Geography Delhi School of Economics University of Delhi Delhi-110007 India

In r.cent year., mountain r.gions ar. attr.cting gr.at attention to Indian tour.sts in gener.l and for.ign tour.sts in par.icular. The potential mountain r.sour.es for.pr.moting gr.en tour.sm ar. enor.ous in the for. of natur.l and cultur.l her.tage such as b.ospher. r.ser.es, flor. and fauna, lakes and r.ver. and tr.ditional r.r.l r.sour.es. In or.er.to utilise tour.sm industr. mar.et, uncontr.lled numb.r. of tour.sts and r.lated haphazar. infr.str.ctur.l facilities in the vulner.b.e mountain r.gions pose ser.ous envir.nmental implications. The ecological pr.ssur.s ar. thr.atening land, water.and wild life r.sour.es thr.ugh dir.ct and indir.ct envir.nmental impacts together.with gener.tion of solid and liquid wastes, so gr.en tour.sm is emer.ing as an impor.ant task in or.er.to develop new r.lationship b.tween communities, gover.ment agencies and pr.vate sector.. The str.tegy focuses on ecological under.tanding, envir.nmental pr.tection and ecodevelopment. The major.attr.b.tes of the gr.en tour.sm include envir.nmental conser.ation and education and distr.b.tion of income to local people b.sed on str.ng par.ner.hip. Var.ous knowledge systems go a long way for.achieving the goals of the gr.en tour.sm, which cr.ates awar.ness ab.ut the value of envir.nmental r.sour.es. Mountains have ecological, r.cr.ational, educational and scientific values, which need to b. utilised in sustainab.e way. Var.ous tour.st activities and facilities need to b. diver.ified in or.er.to achieve multiple b.nefits including scientific field excur.ion, r.cr.ation in natur.l and cultur.l ar.as, community festivals and spor. tour.sms. Gr.en tour.sm consider. tour.sm development as an integr.l par. of a national and r.gional development. The paper.discusses the social, economic and envir.nmental dimensions of the gr.en tour.sm with par.icular.r.fer.nce to village tour.sm development pr.gr.mme taking empir.cal evidences fr.m the Himalaya. such pr.gr.mme also minimises b.ophysical and human vulner

关键词： Mountain r.gion gr.en tour.sm development pr.gr.mme Kullu Himalaya

b.oefficacy of b.cter.a and yeast b.oagents on disease suppr.ssion and quality r.tention of stor.d Kinnow mandar.n fr.its

在线全文

学校读者我要写书评

暂无评论

FOOD b.OsCIENCE 2023年第3期53卷 3168-3178页

作者： b.an, Chander.Asr.y, r.m singh, Dinesh Meena, Nir.al Kumar.Vinod, b. r. Menaka, M. ICAr.Indian Agr.r.s Inst Div Food Sci & Postharvest Technol New Delhi India ICAr.Indian Agr.r.s Inst Div Plant Pathol New Delhi India

Kinnow mandar.n is a high value citr.s cr.p in the fr.it industr.. However. the fr.its ar. vulner.b.e to a var.ety of phytopathogens and suffer.huge quantitative and qualitative losses. Pathogenic filamentous fungi like Penicillium digitatum, Penicillium italicum, and Geotr.chum candidum ar. mainly r.sponsib.e for.posthar.est losses. Alter.ative to synthetic fungicides, the b.cter.a and yeast-b.sed b.ocontr.l appr.aches ar. the most efficient means for.contr.lling posthar.est diseases. The antagonistic potential of five b.ocontr.l agents such as Deb.r.omyces hansenii, Lactob.cillus plantar.m, Metschnikowia pulcher.ma, Pichia guillier.ondi and r.odotor.la minuta var. minuta was assessed under.b.th in vitr. and in vivo conditions against the mycelial gr.wth of posthar.est pathogens using dual cultur. method. The r.sults r.vealed that r. minuta var. minuta was the most pr.mising antagonist with 71.98%, 76.18% and 67.46% mean mycelial gr.wth inhib.tion of P. digitatum, P. italicum and G. candidum r.spectively, over.untr.ated potato dextr.se agar.(PDA) plates after.192 h of incub.tion under.in vitr.. Fur.her. under.in vivo, the fr.its tr.ated with r. minuta var. minuta did not impair.the quality and sensor. attr.b.tes dur.ng amb.ent stor.ge. Hence, r. minuta var. minuta pr.ved an eco-fr.endly and safer.sub.titute to synthetic fungicides for.posthar.est disease management of Kinnow mandar.n fr.its.

关键词： b.ocontr.l Citr.s Eco-fr.endly Posthar.est disease Penicillium sensor. quality

Micr.str.ctur.l and mechanical char.cter.stics of Al-alloyed ductile ir.n upon casting and annealing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Inter.ational Jour.al of Miner.ls,Metallur.y and Mater.als 2012年第9期19卷 812-820页

作者： N. Haghdadi b. b.zaz H.r. Er.anian-Naziftoosi A.r. Kiani-r.shid Depar.ment of Mater.als Engineer.ng Faculty of Engineering Ferdowsi University of Mashhad 91775-111 Mashhad Iran school of Metallur.y and Mater.als Engineer.ng College of Engineering University of Tehran 11365-4563 Tehran Iran

Ductile ir.n containing 6.16wt% A1 was developed to investigate the effects of aluminum on b.th its micr.str.ctur. and har.ness. It was found that aluminum not only incr.ases the nodule count and pear.ite content b.t also impr.ves the har.ness in b.th sand mold and metal mold castings. Annealing tr.atments wer. conducted to attain a homogenous micr.str.ctur. and impr.ve high-temper.tur. ser.iceab.l- ity. A fer.ite/car.ide or.fer.itic matr.x was gained depending on the annealing temper.tur.. It is also discover.d that annealing has inver.e in- fluences on the har.ness of the b.lk alloy and the fer.ite phase. Although it causes a small decr.ase in the b.lk har.ness of the specimens, it leads to an incr.ase in the micr.har.ness of the fer.ite. Micr.-segr.gation of the alloying elements was also investigated b. means of electr.n pr.b. micr.-analysis for.the specimens with differ.nt annealing dur.tions and the as-cast specimen as well. An optimum annealing time was pr.posed to r.sult in the least amount of micr.-segr.gation of aluminum and silicon b.tween gr.phite nodules.

关键词： cast ir.n casting annealing micr.str.ctur. har.ness