检索结果-南通市图书馆

Karrikin and Cyanohydrin Smoke Signals Provide Clues t. New Endogenous Plant.Signaling Compounds

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2013年第1期6卷 29-37页

作者： Gavin R. Flemat.i Mark t. Wat.rs Adrian Scaffidi David j. Merrit. Emilio L. Ghisalbert.' Kingsley W.Dixon St.ven M. Smit. School of Chemist.y and Biochemist.y University of Western Australia Crawley 6009 Western Australia Australia Cent.e in Plant.Energy Biology University of Western Australia Crawley 6009 Western Australia Australia School of Plant.Biology University of Western Australia Crawley 6009 Western Australia Australia Kings Park and Bot.nic Garden Fraser Avenue West Perth 6005 Western Australia Australia

t.o new t.pes of signaling compounds have been discovered in wildfire smoke due t. t.eir abilit. t. st.mulat. seed germinat.on. t.e first.discovered were karrikins, which share some st.uct.ral similarit. wit. t.e st.igol- act.ne class of plant.hormones, and bot. signal t.rough a common F-box prot.in. However, karrikins and st.igolact.nes operat. t.rough ot.erwise dist.nct.signaling pat.ways, each dist.nguished by a specific a/13 hydrolase prot.in. Genet.c analysis suggest. t.at.plant. cont.in endogenous compounds t.at.signal specifically t.rough t.e karrikin pat.way. t.e ot.er act.ve compounds discovered in smoke are cyanohydrins t.at.release germinat.on-st.mulat.ng cyanide upon hydrolysis. Cyanohydrins occur widely in plant. and have a role in defense against.ot.er organisms, but.an addit.onal role in endogenous cyanide signaling should also now be considered.

关键词： fire smoke karrikins st.igolact.nes cyanohydrins cyanide seed germinat.on Arabidopsis t.aliana.

Silencing NOA1 Elevat.s Herbivory-Induced j.smonic Acid Accumulat.on and Compromises Most.of t.e Carbon-Based Defense Met.bolit.s in Nicot.ana at.enuat.

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

j.urnal of Int.grat.ve Plant.Biology 2011年第8期53卷 619-631页

作者： Hendrik Wünsche Ian t. Baldwin Depart.ent.of Molecular Ecology Max Planck Inst.t.t. for Chemical Ecology

Nit.ic oxide-associat.d prot.in 1 （NOA1） is involved in various abiot.c st.ess responses and is required for plant.resist.nce t. pat.ogen infect.ons. However, t.e role of NOA1 in plant.herbivore int.ract.ons has not.been explored. We creat.d NOA1-silenced Nicot.ana at.enuat. plant. （irNaNOA1）. Compared wit. wild-t.pe （Wt. plant., irNaNOA1 plant. had highly decreased phot.synt.esis rat.s. We furt.er examined various t.ait. import.nt.for plant.defense against.it. specialist.herbivore Manduca sext. by t.eat.ng Wt.and irNaNOA1 plant. wit. mechanical wounding and M. sext. oral secret.ons （OS）. NOA1-silenced plant. showed elevat.d levels of herbivory-induced j.smonic acid （j.）, but.decreased j.-isoleucine conj.gat. （j.-Ile） levels. t.e decreased j.-Ile levels did not.result.from compromised j.R （j.smonic acid resist.nt. act.vit. in irNOA1 plant.. Moreover, nit.ogen-rich defensive compounds, nicot.ne and t.ypsin prot.inase inhibit.rs, did not.differ bet.een Wt.and irNaNOA1 plant.. In cont.ast. concent.at.ons of most.carbon-based defensive compounds were lower in t.ese plant. t.an in Wt.plant., alt.ough t.e levels of chlorogenic acid were not.changed. t.erefore, silencing NOA1 alt.rs t.e allocat.on of carbon resources wit.in t.e phenylpropanoid pat.way. t.ese dat. suggest.t.e involvement.of NOA1 in N. at.enuat.’s defense against.M. sext. at.ack, and highlight.it. role in phot.synt.esis, and biosynt.esis of j.smonat.s and secondary met.bolit.s.

关键词： NOA1 defense herbivory nit.ic oxide-associat.d prot.in 1 secondary met.bolit.s.

Ext.nded collect.ve bands in neut.on-rich ^(109)Ru

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2009年第S1期33卷 154-157页

作者：丁怀博朱胜江 j. H. Hamilt.n A. V. Ramayya j. K. Hwang j. O. Rasmussen C. t. Goodin I. Y. Lee 王建国车兴来顾龙 Depart.ent.of Physics Tsinghua University Depart.ent.of Physics Vanderbilt University Lawrence Berkeley Nat.onal Laborat.ry

Levels in t.e neut.on-rich 109Ru have been st.died by observing t.e prompt.γ-rays following t.e spont.neous fission fragment. of 252Cf. t.e ground st.t. band and t.e negat.ve parit. bands have been confirmed and ext.nded. A posit.ve parit. band wit. t.e band head level at.332.5 keV is newly ident.fied and suggest.d as a single-neut.on excit.t.on band built.on t.e 7/2+[404] Nilsson orbit.l. Some st.uct.ral charact.rist.cs of t.ese bands are discussed.

关键词： collect.ve levels γ-t.ansit.ons and level energies neut.on-rich nucleus spont.neous fission

Nonlinear Behaviour of Coflexip Risers

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2001年第4期16卷 479-490页

作者： Kamal Zare t. K. Dat.a Depart.ent.of Civil Engineering Indian Institute of Technology Hauzkhas New Delhi-110016 India Department of Civil Engineering Indian Institute of Technology Hauzkhas New Delhi-110016 India

A modified Newt.n-Raphson it.rat.ve t.chnique is formulat.d for obt.ining t.e st.t.c configurat.on of t.e Lazy 'S' flexible marine riser bet.een t.e float.r and mid-arch buoy under it. submerged self weight.and t.e applied t.p t.nsion. t.e geomet.ically non-linear problem is solved by finit. difference wit. t.e above t.chnique. t.e problem is formulat.d as a regular boundary value problem wit. specified moment. and deflect.ons at.bot. ends. Usually t.e bending st.ffness of t.e flexible riser made of Coflexip pipe is very low. By use of t.e above analysis, several flexible riser configurat.ons are analyzed and t.eir charact.rist.c behaviors are invest.gat.d. Also, changes in t.e riser charact.rist.cs due t. quasi-st.t.c mot.on of t.e float.r end are est.mat.d for t.e safet. of t.e riser layout.

关键词： lazy 'S' riser coflexip pipe flexible riser mid-arch buoy geomet.ic nonlinearily

A NOt. ON HFAG ACt.VIt.ES

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2016年第10期40卷 758-759页

作者： t. Gershon A.j. Schwart. Universit. of Warwick Universit. of Cincinnat.

t.e Heavy Flavor Averaging Group （HFAG） is an int.rnat.onal collaborat.on of physicist. from experiment. measuring propert.es of heavy flavored part.cles. HFAG calculat.s for t.e HEP communit. world average values of quant.t.es such as lifet.mes, branching fract.ons, form fact.rs, mixing paramet.rs, and CP-violat.ng asymmet.ies. Most.paramet.rs concern decays of B and D mesons and τ lept.ns, and many are relat.d t. element. of t.e Cabibbo-Kobayashi-Maskawa （CKM） quark mixing mat.ix [1,2].

关键词：

A new design of groundwat.r sampling device and it. applicat.on

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

j.urnal of Environment.l Sciences 2005年第5期17卷 838-841页

作者： Yih-j.n t.ai Ming-Ching t. Kuo Depart.ent.of Environment.l Resources Engineering Diwan College of ManagementDepartment of Mineral and Petroleum Engineering "National" Cheng Kung University No. 87-1 Nansh Li Madou Tainan Taiwan ChinaTainan Taiwan China

Compounds in t.e at.osphere cont.minat. samples of groundwat.r. An inexpensive and simple met.od for collect.ng groundwat.r samples is developed t. prevent.cont.minat.on when t.e background concent.at.on of cont.minant. is high. t.is new design of groundwat.r sampling device involves a glass sampling bot.le wit. a t.flon-lined valve at.each end. A cleaned and dried sampling bot.le was connect.d t. a low flow-rat. perist.lt.c pump wit. t.flon t.bing and was filled wit. wat.r. No headspace volume was remained in t.e sampling bot.le. t.e sample bot.le was t.en packed in a PVC bag t. prevent.t.e t.rget.component.from infilt.at.ng int. t.e wat.r sample t.rough t.e valves. In t.is st.dy, groundwat.r was sampled at.six wells using bot. t.e convent.onal met.od and t.e improved met.od. t.e analysis of t.ichlorofluoromet.ane（ CFC-11 ） concent.at.ons at.t.ese six wells indicat.s t.at.all t.e groundwat.r samples obt.ined by t.e convent.onal sampling met.od were cont.minat.d by CFC-11 from t.e at.osphere. t.e improved sampling met.od great.y eliminat.d t.e problems of cont.minat.on, preservat.on and quant.t.t.ve analysis of nat.ral wat.r.

关键词： groundwat.r sampling improved met.od convent.onal met.od t.it.um t.ichlorofluoromet.ane(CFC-11 )

Phot.cat.lyt.c degradat.on of Chicago Sky Blue 6B and Benzopurpurin 4B using t.t.nium dioxide t.in film

在线全文

学校读者我要写书评

暂无评论

j.urnal of Environment.l Sciences 2005年第5期17卷 869-872页

作者： Abdul K. Mohammed Kat.ina t. McKenzie Depart.ent.of Chemist.y Winston-Salem State UniversityDepartment of Chemistry North Carolina Agricultural and Technical State University 601 S. Martin Luther King Jr. Drive Winston-Salem North Carolina 27110 USA1601 E. Market Street Greensboro North Carolina 27411 USA

Aqueous solut.ons of azo dyes undergo degradat.on t. form harmless int.rmediat.s and colorless product. following irradiat.on by visible light.in t.e presence of t.t.nium dioxide t.in films. t.e dyes t.at.were st.died in t.is work are： Chicago Sky Blue 6B and Benzopurpurin 4B. Result. obt.ined indicat.d t.at.complet. mineralizat.on of t.e dyes t.ok place under t.e experiment.l condit.ons. t.ere was an increase in conduct.vit. aft.r t.e complet. mineralizat.on experiment. possibly indicat.ng t.e format.on of ions such as NO3^- and SO4^2-. Chemical oxygen demand（COD） measurement. show a decrease in organic mat.er for bot. dyes following complet. degradat.on. t.e effect.of how changing experiment.l condit.ons such as pH, t.mperat.re and st.rt.ng concent.at.ons of dyes affect.d t.e rat. of dye degradat.on was measured. t.ere was an increase in t.e rat. of disappearance of t.e dye color at.lower pH. High concent.at.ons of dye solut.ons reauired Iona dearadat.on t.me.

关键词： t.t.nium dioxide phot.cat.lysis phot.cat.lyt.c degradat.on azo dyes

Charmed baryon resonances wit. heavy-quark symmet.y

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2009年第12期33卷 1323-1326页

作者： L. t.los C. Garcia-Recio V. K. Magas t. Mizut.ni j. Nieves A. Ramos L. L. Salcedo t.eory Group KVI University of Groningen Zernikelaan 25 9747 AA Groningen The Netherlands Depart.ment. de Física At.mica Molecular y Nuclear Universidad de Granada E-18071 Granada Spain Depart.ment.d'Est.uct.ra i Const.t.ent. de la Mat.ria and Inst.t.t.de Ciències del Cosmos Universitat de Barcelona E-08028 Barcelona Spain Depart.ent.of Physics Virginia Polytechnic Institute and State University Blacksburg VA 24061 USA Inst.t.t. de Física Corpuscular (cent.o mixt. CSIC-UV) Institutos de Investigación de Paterna Aptdo. 22085 E-46071 Valencia Spain

We st.dy charmed baryon resonances t.at.are generat.d dynamically from a coupled-channel unit.ry approach t.at.implement. heavy-quark symmet.y. Some st.t.s can already be ident.fied wit. experiment.l observat.ons, such as Ac（2595）, Ac（2660）, Ec（2902） or Ac（2941）, while ot.ers need a compilat.on of more experiment.l dat. as well as an ext.nsion of t.e model t. include higher order cont.ibut.ons. We also compare our model t. previous SU（4） schemes.

关键词： charmed baryon resonances heavy-quark symmet.y SU(8) and SU(4) spin-flavor symmet.y

t.e Effect.of t.t.nia-coat.ng on Elect.ochemical Charact.rist.cs of CMS in PC-Based Elect.olyt.

在线全文

学校读者我要写书评

暂无评论

复旦学报（自然科学版） 2005年第5期44卷 857-858页

作者： j. Cao L.C. Yang t. Zhang Y.P. Wu H.Q. Wu Deparment.of Chemist.y ＆ Shanghai Key Laborat.ry of Molecular Cat.lysis and Innovat.ve Mat.rials Fudan University Shanghai 200433 China

Lit.ium-ion bat.eries have been widely used in port.ble elect.onic devices due t. t.eir high volt.ge and high energy densit.. Most.research has concent.at.d on improving t.eir performance such as capacit., cycling charact.rist.cs and low t.mperat.re range. Propylene carbonat. (PC)-based elect.olyt.s are more desirable t.an et.ylene carbonat. (EC)-based elect.olyt.s because of t.eir low-t.mperat.re charact.rist.cs[1]. Unfort.nat.ly, PC is not.used in commercial lit.ium-ion bat.eries because solvent.decomposit.on and graphit. exfoliat.on occur when lit.ium int.rcalat.s[2].

关键词：锂离子电池二氧化钛丙烯碳酸盐溶胶凝胶体电化学