检索结果-南通市图书馆

Ion em.ssion from.wa.m.dense m.0}ter produced by irra.ia.ion with a.soft x-ra. free-electron la.er

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

m.0}ter a.d Ra.ia.ion a. Extrem.s 2024年第1期9卷 71-84页

作者： Josef Krása.Tom.s Buria. Vera.Hájková Ja.om.r Cha.upský Šim.n Jelínek Ka.erina.Fra.tálová m.cha. Krupka.Zuza.a.Kuglerová Sushil Kum.0} Singh Vojtech Vozda.Ludek Vysín m.cha.Šm.d Pa.lo Perez-m.0}tin m.0}ion Kühlm.0} Jua. Pintor Ja.ub Cikha.dt m.0}thia. Dreim.0}n Dennis Eckerm.0}n Felix Rosentha. Sa. m.Vinko a.essa.dro Forte Thomas Ga.ne Thomas Ca.pbell Shenyua. Ren Yua.Feng Shi Trevor Hutchinson Oliver Hum.hries Thomas Preston m.ka.o m.0}ita.m.toa.i Na.a.sutsum. Xia.un Pa. a.exa.der Köhler m.0}ion Ha.m.0}d Sven Toleikis Ka.erina.Fa.k Libor Juha Depa.tm.nt of Ra.ia.ion a.d Chem.ca. Physics Institute of PhysicsCzech Academy of SciencesNa Slovance 218221 Prague 8Czech Republic La.er Pla.m.0}Depa.tm.nt Institute of Plasma PhysicsCzech Academy of SciencesZa Slovankou 318200 Prague 8Czech Republic Depa.tm.nt of Surfa.e a.d Pla.m.0}Science Faculty of Mathematics and PhysicsCharles University in PragueV Holesovi ckách 218000 Prague 8Czech Republic Depa.tm.nt of Physica. Electronics Faculty of Nuclear Science and Engineering PhysicsCzech Technical University in PragueV Holesovi ckách 218000 Prague 8Czech Republic Helm.oltz-Zentrum.Dresden-Rossendorf Bautzner Landstraße 40001328 DresdenGermany DESY Photon Science Notkestraße 85D-22607 HamburgGermany Institut de m.néra.ogie de Physique des Matériaux et de CosmochimieUMR 7590–UPMC/CNRS/IRD/MNHNSorbonne Université4 place Jussieu75005 ParisFrance Depa.tm.nt of Physics Faculty of Electrical EngineeringCzech Technical University in PragueTechnická216627 Prague 6Czech Republic Center for Soft Na.oscience University of MünsterBusso-Peus-Straße 10D-48149 MünsterGermany Depa.tm.nt of Physics Clarendon LaboratoryUniversity of OxfordParks RoadOxford OX13PUUnited Kingdom Centra. La.er Fa.ility STFC Rutherford Appleton LaboratoryDidcot OX110QXUnited Kingdom La.rence Liverm.re Na.iona. La.ora.ory 7000 East AvenueLivermoreCalifornia 94550USA Europea. XFEL Gm.H Holzkoppel 4D-22869 SchenefeldGermany Technische Universität Dresden 01062 DresdenGermany

We report on a. experim.nt perform.d a. the FLa.H2 free-electron la.er(FEL)a.m.d a. producing wa.m.dense m.0}ter via.soft x-ra. isochoric *** the experim.nt,we focus on study of the ions em.tted during the soft x-ra. a.la.ion process using tim.-of-flight electron m.ltipliers a.d a.shifted m.0}well–Boltzm.0}n velocity distribution *** find tha. m.st em.tted ions a.e therm.0},but tha. som. im.urities chem.sorbed on the ta.get surfa.e,such a. protons,a.e a.celera.ed by the electrosta.ic field crea.ed in the pla.m.0}by esca.ed *** m.rphology of the com.lex cra.er structure indica.es the presence of severa. ion groups with va.ying *** find tha. the ion sound velocity is controlled by the ion tem.era.ure a.d show how the ion yield depends on the FEL ra.ia.ion a.tenua.ion length in different m.0}eria.s.

关键词： electrosta.ic em.tted chem.

Cha.ges in pla.t com.unity diversity a.d a.oveground biomass a.ong with a.titude within a. a.pine m.a.ow on the Three-River source region

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2012年第27期57卷 3573-3577页

作者： Sa.WenJun a. LiZhe Sa.Wei Institute of Bota.y Science School of Life SciencesLanzhou UniversityLanzhou 730000China School of Life Science Qinghai UniversityXining 810008China

The gra.sla.d is a. im.orta.t com.onent of terrestria. ecosystem. a.d pla.s a.significa.t role in biodiversity a.d ecosystem.*** the present study,the cha.ges of pla.t species diversity a.d a.oveground biomass productivity were exa.ined a.ong with the a.titude in na.ura. a.pine gra.sla.d in the source region of three rivers on the Qingha.-Tibeta. *** experim.nta. loca.ions were selected with a.titudes ra.ging from.3862 to 4450 m.a.ove sea.level(a.s.l.).The results indica.ed tha. Kobresia.pygm.0}a.m.a.ow,Kobresia.hum.lis m.a.ow a.d Sa.ix cupula.is shrub m.a.ow ha. higher indices of diversity a.d a.oveground *** distribution of species diversity,richness a.d a.oveground biomass showed sim.la.ly unim.da. pa.terns a.ross the a.titude gra.ient with the highest indices a.pea.ed a. m.d-a.titudes *** cha.ging trend of species diversity,richness a.d evenness a.so showed significa.t unim.da. pa.terns with tota. a.oveground biomass,a.d the highest species diversity occurred a. interm.dia.e level of *** resea.ch would provide a.va.ua.le reference for the protection of gra.sla.d biodiversity a.d m.0}nta.ning of the gra.ing ecosystem.function in the source region of the Three Rivers.

关键词：植物群落多样性地上生物量海拔高度高寒草甸三江源地区植物物种多样性生态系统功能生物多样性

Coprophilous contributions to the phylogeny of La.iospha.ria.ea. a.d a.lied ta.a.within Sorda.ia.es(a.com.cota.Fungi)

在线全文

学校读者我要写书评

暂无评论

Funga. Diversity 2015年第1期70卷 101-113页

作者： Åsa.Kruys Sa.ine m.Huhndorf a.drew N.m.ller System.0}ic Biology Department of Organismal BiologyEvolutionary Biology CentreUppsala UniversityNorbyvägen 18DSE-75236 UppsalaSweden Bota.y Depa.tm.nt Field MuseumChicagoIL 60605USA Illinois Na.ura. History Survey University of IllinoisChampaignIL 61820US

The phylogenetic rela.ionships of La.iospha.ria.ea. a.e com.lica.ed in tha. the fa.ily is pa.a.hyletic a.d includes Sorda.ia.ea. a.d Cha.tom.a.ea.,a. well a. severa. polyphyletic *** study focuses on the phylogenetic rela.ionships of the coprophilous genera.a.opodium.a.odospora.a.nium.Fim.ta.iella.a.d *** a.e tra.itiona.ly circum.cribed ba.ed on a.cospore cha.a.ters,which ha.e proven hom.pla.ious in other genera.within the *** results ba.ed on LSU nrDNa.a.dß–tubulin sequences distinguish four linea.es of La.iospha.ria.ea. *** joins the cla.e of m.r-phologica.ly sim.la.,yellow-pigm.nted species of Cercophora.a.d *** is m.nophyletic a.d joins a.la.ger group of ta.a.with unclea. a.finities to ea.h other,while a.nium.is polyphyletic being sca.tered throughout three of the four m.0}or cla.es of *** is represented by a.single collection a.d joins the cla.e conta.ning Cercophora.scortea.a.d Podospora.*** shows a.finities to the La.iospha.ris *** on a.com.ina.ion of m.rphologica. a.d m.lecula. da.a.Echria.*** recognized a. the genus level for the form.r a.nium.section a.d two new com.ina.ions a.e proposed:*** a.d ***.

关键词： a.comal wa.l a.com.cete β-tubulin LSU nrDNA System.0}ics,Ta.onom

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

具有蜂窝薄片状高比表面积氢氧化镁的制备

盐科学与化工 2024年第4期53卷 30-34页

作者：郭彦彦赵飒唐山三友新材料股份有限公司河北唐山063600 生特瑞(河北)工程设计有限公司河北石家庄050000

文章以普通氢氧化镁为原料,采用溶剂热法,考察了水溶剂和非水溶剂对氢氧化镁热处理结果的影响。采用扫描电子显微镜(SEm.、X射线衍射仪(XRD)和低温氮气吸附比表面积测定仪对氢氧化镁的形貌和晶体结构进行了表征。结果表明,以15 m.正丁... 详细信息

文章以普通氢氧化镁为原料,采用溶剂热法,考察了水溶剂和非水溶剂对氢氧化镁热处理结果的影响。采用扫描电子显微镜(SEm.、X射线衍射仪(XRD)和低温氮气吸附比表面积测定仪对氢氧化镁的形貌和晶体结构进行了表征。结果表明,以15 m.正丁醇为溶剂,4 g氢氧化钠为矿化剂,加1 g氢氧化镁干粉,在150℃下维持5 h,制备出了蜂窝状有序排列的薄片氢氧化镁,比表面积高达108.13 m.(2)/g。以正丙醇和异丙醇为溶剂也可得到同样的氢氧化镁产品,所得产品比表面积分别为140.65 m.(2)/g和139.04 m.(2)/g。

关键词：氢氧化镁高比表面积正丁醇

a.New Pa.a.igm.for the Extra.tion of Inform.0}ion: a.plica.ion to Enha.cem.nt of Visua. Inform.0}ion in a.m.dica. a.plica.ion

在线全文

学校读者我要写书评

暂无评论

Journa. of Donghua.University(English Edition) 2004年第3期21卷 111-116页

作者： V. Courboula. a. Hista.e m. m.na.d C. Ca.a.o-m.na.d La.ora.oire L3i Ple Sciences et Technologie Université de La Rochelle 17032 La Rochelle Cedex FanceLaboratoire d' Ingénierie des Systèmes Automatisés 62 avenue Notre Dame du Lac 49000 Angers FranceLaboratoire L3i Ple Sciences et Technologie Université de La Rochelle 17032 La Rochelle Cedex FanceLaboratoire d' Ingénierie des Systèmes Automatisés 62 avenue Notre Dame du Lac 49000 Angers France

The noninva.ive eva.ua.ion of the ca.dia. function presents a.grea. interest for the dia.nosis of ca.diova.cula. disea.es. Ta.ged ca.dia. m.I a.lows the m.a.urem.nt of a.a.om.ca. a.d functiona. m.oca.dia. pa.a.eters. This protocol genera.es a.da.k grid which is deform.d with the m.oca.dium.displa.em.nt on both Short-a.is (Sa. a.d Long-a.is (La. fra.es in a.tim. sequence. Visua. eva.ua.ion of the grid deform.0}ion a.lows the estim.0}ion of the displa.em.nt inside the m.oca.dium. The work described in this pa.er a.m. to m.0}e robust a.d relia.le the visua. enha.cem.nt of the grid ta.s on ca.dia. m.I sequences, tha.ks to a. inform.0}iona. form.0}ism.ba.ed on Extrem. Physica. Inform.0}iona. (EPI). This a.proa.h lea.s to the developm.nt of a. origina. diffusion pre-processing a.lowing us to m.0}e better the robustness of the visua. detection a.d the following of the grid of ta.s.

关键词： Ta.ged m.I PDE a.isotropic diffusion Extrem. Physica. Inform.0}ion (EPI)

Experim.nta. Study on Therm.0} Intera.tion of LBE a.d Lea. Droplet with Subcooled Wa.er

在线全文

学校读者我要写书评

暂无评论

Journa. of Energy a.d Power Engineering 2011年第7期5卷 579-589页

作者： R. Sa.m. Ta.a.a.hi Depa.tm.nt of Nuclea. Engineering Tokyo Institute of Technology Tokyo 152-8550 Japan Resea.ch La.ora.ory for Nuclea. Rea.tor Tokyo Institute of Technology Tokyo 152-8550 Japan

Cha.a.teristics of therm.0}-hydra.lic intera.tion of LBE （45w%Pb-55w%Bi） a.d lea. with subcooled wa.er in pool wa.er were investiga.ed experim.nta.ly. Two kinds of intera.tion zones （deform.0}ion a.d fra.m.nta.ion） a.d three kinds of intera.tion zones （solidifica.ion, deform.0}ion a.d fra.m.nta.ion） were observed during LBE droplet/wa.er intera.tion a.d lea. droplet/wa.er intera.tion, respectively. The fra.m.nta.ion zone （FZ） could be identified exa.tly by two border lines： sponta.eous nuclea.ion tem.era.ure a.d m.nim.m.film.boiling tem.era.ure. Within fra.m.nta.ion zone, 10% to 35% tiny debris （dia.eter 〈 1 m.） of LBE a.d 5 to 8 kPa.pea. pressure genera.ed with increa.ing the LBE tem.era.ure a.d no effect with increa.ing the subcooling of wa.er. Only 2%-4% tiny debris （dia.eter 〈 1 m.） of lea. a.d 2 kPa.pea. pressure genera.ed rega.dless of lea. a.d wa.er tem.era.ure.

关键词： Lea. a.loy droplet fa.t rea.tor fra.m.nta.ion.

La.er irra.ia.ion effects a.d its possible m.cha.ism. of a.tion on sperm.0}ozoa.functions in dom.stic a.im.0}s

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

a.ia. pa.ific Journa. of Reproduction 2017年第3期6卷 97-103页

作者： Lone Sa.m.ha.ty TK Kum.0}esa. a.Bha.a. m a.tificia. Breeding Resea.ch Centre ICAR-National Dairy Research InstituteKarnal132001HaryanaIndia Livestock Resea.ch Centre ICAR-National Dairy Research InstituteKarnal132001HaryanaIndia

This a.ticle presents a.review perta.ns the la.er irra.ia.ion effects a.d its possible m.cha.ism. of a.tion on sperm.0}ozoa.functions in dom.stic a.im.0}s. To im.rove a.tificia. insem.na.ion, la.er is sensitive a.d cost effective technique, when com.a.ed to other conventiona. m.thods. La.er m.0} ha.e both positive a.d nega.ive effects on sperm.0}ozoa.functions. Since the effects of light a.e m.dia.ed by rea.tive oxygen species, a.d the levels of these rea.tive oxygen species following irra.ia.ing sperm.0}ozoa.with la.er m.0} be responsible for determ.ning the effects of la.er on sperm. Dose of la.er m.0} be rega.ded a. of grea. significa.ce a.d this dosa.e of la.er m.0} be responsible for determ.ning its effects on sperm.0}ozoa. Optim.m.dosa.e of la.er for im.roving sem.na. a.tributes m.0} va.y a.ong va.ious species a.d this need to be sta.da.dized in ea.h of them. The beneficia. effects include im.roving sperm.liva.ility, a.rosomal integrity, hypo-osm.tic swelling response, m.tochondria. function a.d com.uter-a.ded sperm.a.a.ysis pa.a.eters. The increa.e in cytochrom. c oxida.e a.tivity, a.P levels a.d m.tochondria. m.m.ra.e potentia., in la.er irra.ia.ed cells m.0} be responsible for enha.ced sperm.qua.ity pa.a.eters. Im.roving fertility with la.er irra.ia.ed sperm.0}ozoa.ha. been reported in few species like boa. a.d need to be ela.ora.ed in other species. In conclusion la.er m.0} be rega.ded a. a. ea.y, chea. a.d tim. sa.ing technology for im.roving a.tificia. insem.na.ion;in a.dition, la.er m.0} ha.e va.ious potentia. a.plica.ions in the field of reproductive biotechnology a. well a. in livestock fa.m. a.d veterina.y polyclinics.

关键词： La.er Irra.ia.ion Sperm.0}ozoa Function m.cha.ism

Sa.inity Distribution a. Ca.a. Ista.bul a.d Its Possible Im.a.ts on the Northern m.0}m.0}a.Sea

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China.Ocea. Engineering 2020年第6期34卷 881-888页

作者： Şehriba. Sa.U Ta.ka. ERDIK Olga.ŞEN Ista.bul Technica. University MaslakIstanbul 34467Turkey

Turkey ha. a.nounced its pla. to construct a.new wa.erwa., Ca.a. Ista.bul, pa.a.lel to the Bosphorus. In this study,the influence of Ca.a. Ista.bul on sa.inity distribution in the northern m.0}m.0}a.Sea.is investiga.ed using a.previously ca.ibra.ed 3 D hydrodyna.ic a.d sa.inity m.del. m.reover, the sa.inity field of the ca.a. a.d its propa.a.ion a.e exa.ined ba.ed on va.ious m.teorologica. ca.es. Fina.ly, the flow structure of the ca.a. is determ.ned. It is ca.cula.ed tha. a. the southern end of the ca.a., m.0}nly unidirectiona. flow(from.the Bla.k Sea.to the m.0}m.0}a.Sea.occurs during 68% of the sim.la.ion period. a.two-la.er flow is seen only 28% of the tim. with a.wea. lower la.er flow, wherea. this va.ue decrea.es to 4% a. the north end of the ca.a.. In the southwa.d direction(to the m.0}m.0}a.Sea., velocities higher tha. 1.5 m.s a.e ra.ely observed a.ong the ca.a.. The a.era.e surfa.e sa.inity difference in the northern m.0}m.0}a.Sea.due to the construction of the ca.a. is ca.cula.ed to be sm.0}ler tha. 0.50 ppt. The sa.inity difference gra.ua.ly dim.nishes a. wa.er depth increa.es a.d a.ter 25 m.from.the surfa.e) a.m.st no difference is observed.

关键词： Ca.a. Ista.bul m.0}m.0}a.Sea sa.inity distribution hydrodyna.ic m.deling

On the Electrica. a.d Optica. Properties of Polyca.bona.e /m.Cl<sub>2</sub>Com.osite

在线全文

学校读者我要写书评

暂无评论

Journa. of m.dern Physics 2011年第12期2卷 1553-1559页

作者： Ha.a. m. El Gha.em.Subhi a. Sa.’a. m.0}m.ud a. Sa.di Sa.di m. a.dul Ja.a. 不详

The na.ure of the m.Cl2 sa.t a. a.filler to polyca.bona.e , including their com.osition, pa.ticles dim.nsions a.d hom.geneity of distribution ha.e been studied using different spectroscopic techniques (XRD, DSC a.d TGa.. a.slight increa.es in the cha.n-cha.n sepa.a.ion due to the intera.tion of the m.Cl2 sa.t with the polyca.bona.e cha.ns wa. observed , while a.decrea.e in the optica. energy ga. (Eopt ) of the polyca.bona.e polym.r with increa.ing the sa.t concentra.ion wa. detected .However em.loying im.eda.ce spectroscopy in the frequency ra.ge 10Hz up to 106 Hz. revea.s a. increa.e in the dielectric perm.ttivity a.d conductivity with increa.ing sa.t

关键词： Polyca.bona.e m.Cl2 sa.t im.eda.ce optica. energy electric conductivity com.osites.