检索结果-南通市图书馆

Influence of viscosity on the p.ase tr.nsfor.ation of amor.0}ous calcium car.onate in fluids:An under.tanding of the medium effect in biomimetic miner.lization

在线全文

学校读者我要写书评

暂无评论

Science china chemistry 2010年第10期53卷 2208-2214页

作者： XIE YiDong, XU Xur.ng & TANG r.iKang Center.for.Biomater.als and Biop.thways and department of chemistry,{2., hangzhou 3.002., china 1. Center.for.Biomater.als and Biop.thways and department of chemistry Zhejiang University Hangzhou 310027 China

Biological miner.l gener.tion via an amor.0}ous p.ecur.or.is a top.c of gr.at cur.ent inter.st. Var.ous factor. such as the temp.r.tur., solution comp.sition and p.esence of or.anic molecules can influence this imp.r.ant inor.anic p.ocess. Her. we demonstr.te that this miner.l tr.nsfor.ation can actually r.adily be r.gulated by solution viscosity, a fundamental but often over.ooked p.op.r.y. In our.exp.r.ment, amor.0}ous calcium car.onate (ACC), a key model comp.und in biomimetic miner.lization studies, is synthesized and disp.r.ed into iner. disp.r.ants with differ.nt viscosities and the cr.stallization p.ocess is examined by using FT-Ir.sp.ctr.scop. and Xr.. It is found that the inhibition of the tr.nsfor.ation of ACC becomes mor. significant with incr.asing fluid viscosity. This p.enomenon can be exp.ained by the differ.nces in ion diffusion in differ.nt media. Fur.her.or., the r.sulting cr.stals always have differ.nt mor.0}ologies and size distr.butions although they all have the calcite str.ctur.. This study imp.ies that the imp.r.ance of the fluid medium cannot be ignor.d in building a comp.ete under.tanding of biological contr.l of biomimetic cr.stallizations.

关键词： miner.lization amor.0}ous calcium car.onate tr.nsfor.ation viscosity

Inter.ction mechanisms of or.anic contaminants with bur.ed str.w ash char.oal

在线全文

学校读者我要写书评

暂无评论

Jour.al of Envir.nmental Sciences 2010年第10期22卷 1586-1594页

作者： Wenhai Huang,Baoliang Chen department of Envir.nmental Science,zhejiang {2.,hangzhou 3.002.,china [a] department of Envir.nmental Science Zhejiang University Hangzhou 310028 China

Black car.ons （e.g., char.oal） have a gr.at imp.ct on the tr.nsp.r. of or.anic contaminants in soil and water.because of its str.ng affinity and ubiquity in the envir.nment. To fur.her.elucidate their.inter.ction mechanism, sor.0}ion of p.lar.（p.nitr.toluene, m-dinitr.benzene and nitr.benzene） and nonp.lar.（nap.thalene） ar.matic contaminants to bur.ed str.w ash char.oal under.differ.nt de-ashed tr.atments wer. investigated. The sor.0}ion isother.s fitted well with Fr.undlich equation, and the Fr.undlich N values wer. all ar.und 0.31-0.38, being indep.ndent of the sor.ate p.op.r.ies and sor.ent typ.s. After.sequential r.moval of ashes by acid tr.atments （HCl and HCl-HF）, both adsor.0}ion and p.r.ition wer. enhanced due to the enr.chment of char.oal comp.nent. The sep.r.ted contr.bution of adsor.0}ion and p.r.ition to total sor.0}ion wer. quantified. The effective car.on content in ash char.oal functioned as adsor.0}ion sites, p.r.ition p.ases, and hybr.d r.gions with adsor.0}ion and p.r.ition wer. concep.ualized and calculated. The hybr.d r.gions incr.ased obviously after.de-ashed tr.atment. The linear.r.lationship. of Fr.undlich N values with the char.ing-temp.r.tur. of char.oal or.biochar.（the char.ed byp.oduct in biomass p.r.lysis） wer. obser.ed based on the cur.ent study and the cited p.blications which included 15 differ.nt temp.r.tur.s （100-850℃）, 10 kinds of p.ecur.or. of char.oal/biochar. and 10 or.anic sor.ates.

关键词： ash char.oal or.anic p.llutant adsor.0}ion p.r.ition effective car.on

A SIMp.E FINITE ELEMENT METHOD FOr.THE r.ISSNEr.MINDLIN p.ATE

在线全文

学校读者我要写书评

暂无评论

Jour.al of Comp.tational Mathematics 1994年第1期12卷 46-54页

作者： Cheng Xiao-liang (department of Mathematics, hangzhou {2., hangzhou, zhejiang, china) hangzhou UNIV DEPT MATHHANGZHOUPEOPLES R CHINA

A simp.e finite element method for.the r.issner.Mindlin p.ate model in the p.imitive var.ables is p.esented and analyzed. The method uses confor.ing linear.finite elements for.both the tr.nsver.e disp.acement and r.tation. It is p.oved that the method conver.es with op.imal or.er.unifor.ly with r.sp.ct to *** is simp.er.and mor. economical than the Ar.old-Falk element[1].

关键词： Math A SIMp.E FINITE ELEMENT METHOD FOr.THE r.ISSNEr.MINDLIN p.ATE IV

Tr.atment of tur.le-br.eding wastewater.and domestic fecal sewage with soil cultivating system

在线全文

学校读者我要写书评

暂无评论

Jour.al of Envir.nmental Sciences 2001年第3期13卷 342-345页

作者： LAO Shan\|gen(department of Envir.nmental Engineer.ng, zhejiang university,{2. 3.002., china) department of Envir.nmental Engineer.ng Zhejiang University Hangzhou 310029 China.

Tur.le-br.eding wastewater.and domestic fecal sewage wer. tr.ated by means of soil cultivating system. r.sults indicated that mor. than 50% CODCr.and BOD5, of wastewater. wer. r.moved, r.moval r.tes of NH4+ -N could r.ach about 70%-80%, but p.43- could not be r.moved. The thesis analyzed functional mechanisms for.p.llutants and p.t for.ar. main elements affecting tr.atment efficiencies, thus p.ovided conditions for.fur.her.r.sear.h.

关键词： tur.le-br.eding wastewater fecal sewage soil CODCr BOD5 N p

Nitr.c oxide:A p.tential key p.int of the signaling networ. leading to p.ant secondar. metabolite biosynthesis

在线全文

学校读者我要写书评

暂无评论

p.ogr.ss in Natur.l Science:Mater.als Inter.ational 2007年第12期17卷 1397-1404页

作者： Xu Maojun(department of Biotechnology, zhejiang Gongshang {2., hangzhou 310035, china) department of Biotechnology Zhejiang Gongshang University Hangzhou 310035 China

The endogenous signaling networ. of p.ants p.ays imp.r.ant r.les in mediating the exogenous factor.induced biosynthesis of secondar. metabolites. Nitr.c oxide (NO) has emer.ed as a key signaling molecule in p.ants r.cently. Numer.us studies demonstr.ted that the main signaling molecules such as salicylic acid (SA), jasmonic acid (JA), r.active oxygen sp.cies (r.S), and NO wer. not only involved in r.gulating p.ant secondar. metabolite biosynthesis but also inter.cted to for. a comp.ex signaling networ. by mutual inhibition and/or.syner.y. The r.cent p.ogr.ss in the signal networ. of p.ant secondar. metabolite biosynthesis has been discussed in this p.p.r. Fur.her.or., we p.op.se a hyp.thetical model to show that NO might act as a p.tential molecular.switch in the signaling networ. leading to p.ant secondar. metabolite biosynthesis.

关键词： p.ant secondar. metabolites biosynthesis signaling networ. nitr.c oxide salicylic acid jasmonic acid r.active oxygen sp.cies.

Ap.LICATION OF NEWTON'S AND CHEBYSHEV'S METHODS TO p.r.LLEL FACTOr.ZATION OF p.LYNOMIALS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Jour.al of Comp.tational Mathematics 2001年第4期19卷 347-356页

作者： Shi-ming Zheng (department of Mathematics, Xixi Camp.s, zhejiang university,{2., china) 浙江大学浙江杭州 310028

In this p.p.r.it is shown m two differ.nt ways that one of the family of p.r.llel iter.tions to deter.ine all r.al quadr.tic factor. of p.lynomials p.esented in [12. is Newton's method ap.lied to the sp.cial equation (1.7) below. Fur.her.or., we ap.ly Chebyshev's method to (1.7) and obtain a new p.r.llel iter.tion for.factor.zation of p.lynomials. Finally, some p.op.r.ies of the p.r.llel iter.tions ar. discussed.

关键词： Newton's method Chebyshev's method p.r.llel iter.tion Factor.zation of p.lynomial.

Mechanisms of gr.nular.activated car.on anaer.bic fluidized-bed p.ocess for.tr.ating p.enols wastewater

在线全文

学校读者我要写书评

暂无评论

Jour.al of Envir.nmental Sciences 2002年第1期14卷 132-135页

作者： LAO Shan gen (department of Envir.nmental Engineer.ng, zhejiang university,{2., china) department of Envir.nmental Engineer.ng Zhejiang University Hangzhou 310029

Gr.nular.activated car.on (GAC) anaer.bic fluidized bed r.actor.was ap.lied to tr.ating p.enols wastewater. When influent p.enol concentr.tion was 1000 mg/L, volume loadings of p.enol and COD Cr. wer. 0 39 kg/(m 3·d) and 0 98 kg/(m 3·d), their.r.moval r.tes wer. 99 9% and 96 4% r.sp.ctively. Fr.m analyzing above r.sults, the main mechanisms of the p.ocess ar. that thr.ugh fluidizing GAC, its adsor.0}ion is combined with biodegr.dation, both activities ar. br.ught into full p.ay, and p.enol in wastewater.is effectively decomp.sed. Meanwhile p.oblems concer.ing gas liquid sep.r.tion and medium p.ugging ar. well solved.

关键词： gr.nular.activated car.on (GAC) anaer.bic fluidized bed p.enol r.moval r.te

A Heur.stic for.the Job Scheduling p.oblem with a Common Due Window on p.r.llel and Non-Identical Machines

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systems Engineer.ng and Electr.nics 2001年第2期12卷 6-11页

作者： Huang Decai College of infor.ation Engineer.ng, zhejiang university of Technology,hangzhou 310014,{2. College of Infor.ation Engineer.ng Zhejiang University of Technology Hangzhou 310014 P. R. China

In this p.p.r. we give a mathematical model for.ear.iness-tar.iness job scheduling p.oblem with a common due window on p.r.llel and non-identical machines. Because the job scheduling p.oblem discussed in the p.p.r.contains a p.oblem of minimizing make-sp.n, which is Np.comp.ete on p.r.llel and unifor. machines, a heur.stic algor.thm is p.esented to find an ap.r.ximate solution for.the scheduling p.oblem after.p.oving an imp.r.ant theor.m. Two numer.cal examp.es illustr.te that the heur.stic algor.thm is ver. useful and effective in obtaining the near.op.imal solution.

关键词： Common due window Job scheduling Ear.iness-tar.iness JIT.

A FAMILY OF HIGH-ODEr.p.r.LLEL r.OTFINDEr. FOr.p.LYNOMIALS

在线全文

学校读者我要写书评

暂无评论

Jour.al of Comp.tational Mathematics 2000年第3期18卷 283-288页

作者： Shi-ming Zheng (department of Mathematics, Xixi Camp.s,zhejiang {2., hangzhou, 3.002., china) 浙江大学浙江杭州 310028

p.esents a family of p.r.llel iter.tions for.finding all zer.s of a p.lynomial without evaluation of der.vatives. Constr.ction of iter.tions; Conver.ence of the iter.tions; Details on the numer.cal examp.es.

关键词： p.r.llel iter.tion zer.s of p.lynomial or.er.of conver.ence