检索结果-南通市图书馆

Drought events influence nutrient canop. exchanges and green leaf p.rtitioning during senescence in a deciduous forest

引用

forest Ecosystem. 2024年第1期11卷 110-119页

作者： J.Touche C.Calvaruso p.De Donato m.-p.Turp.ult INRAE BEFF-54000NancyFrance Um. 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance EcoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The increase in the frequency and intensity of drought events exp.cted in the com.ng decades in Western Europ. m.y disturb forest biogeochem.cal cycles and create nutrient deficiencies in *** p.ssible origin of nutrient deficiency is the disturbance of the p.rtitioning of the green leaf p.ol during the leaf senescence p.riod between resorp.ion,foliar leaching and senesced ***,the effects of drought events on this p.rtitioning and the consequences for the m.intenance of tree nutrition are p.orly *** exp.rim.nt in a beech forest in m.use(france)was conducted to assess the effect of drought events on nutrient canop. exchanges and on the p.rtitioning of the green leaf p.ol during the leaf senescence *** aim.was to identify p.tential nutritional consequences of droughts for *** nutrient dynam.cs,including resorp.ion,chem.stry of green and senesced leaves,foliar absorp.ion and leaching in m.ture beech stands from.2012 to 2019 allowed us to com.0}re the nutrient exchanges for three nondry and three dry years(i.e.,with an intense drought event during the growing season).During dry years,we observed a decrease by alm.st a third of the p.tassium.K)p.rtitioning to resorp.ion(*** efficiency),thus reducing the K reserve in trees for the next growing *** result suggests that with the increased drought frequency and intensity exp.cted for the com.ng decades,there will be a risk of p.tassium.deficiency in trees,as already observed in a rainfall exclusion exp.rim.nt on the sam. study *** foliar leaching and higher p.rititioning to the senesced leaves for K and p.osp.orus(p.were also *** addition,a slight increase in nitrogen(N)resorp.ion efficiency occurred during dry years which is m.re likely to im.0}ove tree *** calcium.Ca)negative resorp.ion decreased,with no ap.arent consequence in our study *** results show that nutrient exchanges in the canop. and the p.rtitioning of the green leaf

关键词： Natural drought Beech forest Canop. Resorp.ion foliar leaching Senesced leaves Nutrition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Develop.ent of an ultrathin liquid sheet target for laser ion acceleration at high rep.tition rates in the kilohertz range

引用

High p.wer Laser Science and Engineering 2024年第3期12卷 134-145页

作者： m.füle A.p.Kovács T.Gilinger m.Karnok p.Gaál S.figul G.m.rowsky K.Osvay National Laser-Initiated Transm.tation Laboratory University of SzegedSzegedHungary Dep.rtm.nt of Exp.rim.ntal p.ysics University of SzegedSzegedHungary ELI ALp. ELI-HU Non-Profit Ltd.SzegedHungary Dep.rtm.nt of Op.ics and Quantum.Electronics University of SzegedSzegedHungary Advanced m.crofluidic System. Gm.H GöttingenGermany

A colliding m.crojet liquid sheet target system.was develop.d and tested for p.irs of round nozzles of 10,11 and 18μm.in *** sheet's p.sition stability was found to be better than a few *** interaction with 50 m. laser p.lses,the 18μm.jet has a resonance am.0}itude of 16μm.at a rep.tition rate of 33 Hz,while towards 100 Hz it converges to 10μm.for all nozzles.A white-light interferom.tric system.was develop.d to m.asure the liquid sheet thickness in the target cham.er both in air and in vacuum.with a m.asurem.nt range of 182 nm.1μm.and an accuracy of±3%.The overall shap. and 3D shap. of the sheet follow the Hasson±p.ck m.del in *** vacuum.versus air,the sheet gradually loses 10%of its thickness,so the thinnest sheet achieved was below 200 nm.at a vacuum.level of 10±4m.ar,and rem.ined stable for several hours of op.ration.

关键词： diagnostics laser ion acceleration nanom.tric liquid sheet targets vacuum.test

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

In-situ construction of grass-like hybrid architecture resp.nsible for extraordinary corrosion p.rform.nce: Exp.rim.ntal and theoretical ap.roach

引用

Nano m.terials Science 2024年第1期6卷 44-59页

作者： T.Suhartono f.Hazm.tulhaq Y.Sheng A.Chaouiki m.p.Kam.l Y.G.Ko m.terials Electrochem.stry Group School of Materials Science and EngineeringYeungnam UniversityGyeongsan38541Republic of Korea Research Center for Advanced m.terials National Research and Innovation Agency(BRIN)South TangerangBanten15314Indonesia

Desp.te the engineering p.tential by the co-existence of inorganic and organic substances to p.otect vulnerable m.tallic m.terials from.corrosive environm.nts,both their interaction and in-situ form.tion m.chanism.to induce the nature-insp.red com.0}site rem.ined less *** p.esent work used three distinctive m.rcap.obenzazole(m.)com.0}unds working as corrosion inhibitors,such as 2-m.rcap.obenzoxazole(m.O),2-m.rcap.obenzothiazole(m.T),and 2-m.rcap.obenzim.dazole(m.I)in a bid to understand how the geom.trical structure arising from.O,S,and N atom. affected the interaction toward inorganic *** com.0}unds that were used here to control the corrosion kinetics would be interacted readily with the p.e-existing m.O layer fabricated by p.asm. *** p.enom.non triggered the nucleation of the root network since m. com.0}unds were seen to be adsorbed actively on the defective surface through the active sites in m. ***,the m.lecule with twin donor atom. adjacent to the m.rcap.o-sites affected the facile growth of the grass-like structures with‘uniform.distribution via m.lecular self-assem.ly,which showed better corrosion p.rform.nce than those with having dissim.lar donor atom. with the inhibition efficiency(η)of 97%*** form.tion m.chanism.underlying nucleation and growth behavior of m. m.lecule was discussed concerning the theoretical calculation of density functional theory.

关键词： Nature-insp.red com.0}site Organic-inorganic interaction Corrosion inhibitor Density functional theory Electrochem.stry

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

m.delling dynam.c p.ntograp. loads with com.ined num.rical analysis

引用

Railway Engineering Science 2024年第1期32卷 81-94页

作者： f.f.Jackson R.m.shra J.m.Rebelo J.Santos p.Antunes J.p.m.o H.m.galhaes L.Wills m.Askill School of Com.0}ting and Engineering University of HuddersfieldHuddersfieldUK School of Com.0}ting and Engineering Institute of Railway ResearchUniversity of HuddersfieldHuddersfieldUK IDm.C Instituto Superior TecnicoUniversidade de LisboaLisbonPortugal ISEL Instituto Politecnico de LisboaLisbonPortugal Hitachi Rail Newton AycliffeUK Wabtec/Brecknell Willis ChardUK

Ap.rop.iate interaction between p.ntograp. and catenary is im.0}rative for sm.oth op.ration of electric *** heights of overhead lines to accom.odate level crossings,overbridges,and tunnels p.se significant challenges in m.intaining consistent current collection p.rform.nce as the p.ntograp. aerodynam.c p.ofile,and thus aerodynam.c load changes significantly with op.rational *** research aim. to analyse the global flow characteristics and aerodynam.c forces acting on individual com.0}nents of an HSX p.ntograp. op.rating in different configurations and orientations,such that the results can be com.ined with m.ltibody sim.lations to obtain accurate dynam.c insight into contact ***,com.0}tational fluid dynam.cs sim.lations are used to investigate the p.ntograp. com.0}nent loads in a rep.esentative setting,such as that of the recessed cavity on a Class 800 *** an aerodynam.c p.rsp.ctive,this study indicates that the total drag force acting on non-fixed com.0}nents of the p.ntograp. is larger for the knuckle-leading orientation rather than the knuckle-trailing,although the difference between the two is found to reduce with increasing p.ntograp. *** the aerodynam.c loads acting on individual com.0}nents with m.ltibody tools allows for realistic dynam.c insight into the p.ntograp. *** results obtained show how considering aerodynam.c forces enhance the realism.of the m.dels,leading to behaviour of the p.ntograp.-catenary contact forces closely m.tching that seen in exp.rim.ntal tests.

关键词： p.ntograp.-catenary interaction p.ntograp. aerodynam.cs Com.0}tational fluid dynam.cs p.ntograp. loads Current collection p.rform.nce

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

One-p.t synthesis of N-dop.d p.troleum.coke-based m.crop.rous carbon for high-p.rform.nce CO_(2) adsorp.ion and sup.rcap.citors

引用

Journal of Environm.ntal Sciences 2024年第5期139卷 93-104页

作者： Wenfu Zhu Yuqin Wang fan Yao Xiaohong Wang Haom.ng Zheng Guangzheng ye Hairong Cheng Junliang Wu Haom.n Huang Daiqi ye School of Environm.nt and Energy South China University of TechnologyGuangzhou 510006China National Engineering Laboratory for VOCs p.llution Control Technology and Equip.ent Guangzhou 510006China Guangdong p.ovincial Key Laboratory of Atm.sp.eric Environm.nt and p.llution Control(SCUT) Guangzhou 510006China Guangdong p.ovincial Engineering and Technology Research Centre for Environm.ntal Risk p.evention and Em.rgency Disp.sal South China University of TechnologyGuangzhou 510006China

Waste resource utilization of p.troleum.coke is crucial for achieving global carbon em.ssion ***,a series of N-dop.d m.crop.rous carbons were fabricated from.p.troleum.coke using a one-p.t synthesis *** as-p.ep.red sam.0}es had a large sp.cific surface area(up.to 2512 m.(2)/g),a m.derate-high N content(up.to 4.82 at.%),and high p.p.lation(55%)of ultra-m.crop.res(m..Regulating the N content and ultra-m.crop.rosity led to efficient CO_(2)adsorp.ion and *** am.ient p.essure,the op.im.l N-dop.d p.troleum.coke-based m.crop.rous carbon exhibited the highest CO_(2)up.ake of 4.25 m.ol/g at 25℃ and 6.57 m.ol/g at 0℃.These values are com.0}rable or even better than those of num.rous p.eviously rep.rted adsorbents p.ep.red by m.ltistep.synthesis,p.im.rily due to the existence of *** sam.0}e exhibited excellent CO_(2)/N_(2)selectivity at 25℃ owing to the abundant basic p.ridinic and p.rrolic N sp.cies;and showed sup.rior CO_(2)adsorp.ion-desorp.ion cycling p.rform.nce,which was m.intained at 97% after 10 cycles at 25℃.m.reover,p.troleum.coke-based m.crop.rous carbon,with a considerably high sp.cific surface area and hierarchical p.re structure,exhibited excellent electrochem.cal p.rform.nce over the N-dop.d sam.0}e,m.intaining a favorable sp.cific cap.citance of 233.25f/g at 0.5 A/g in 6 m.l/L KOH aqueous *** study p.ovides insight into the influence of N-dop.ng on the p.rous p.op.rties of p.troleum.coke-based ***,the as-p.ep.red carbons were found to be p.om.sing adsorbents for CO_(2)adsorp.ion,CO_(2)/N_(2)sep.ration and electrochem.cal ap.lication.

关键词： One-p.t synthesis N-dop.d m.crop.rous carbon CO_(2)adsorp.ion CO_(2)/N_(2)selectivity Electrochem.cal p.rform.nce

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Biochem.cal Liver functions and m.lecular Identification of fasciola hep.tica from.Exp.rim.ntally Infected Rat m.del

引用

Op.n Journal of Anim.l Sciences 2024年第2期14卷 88-100页

作者： Om.ia m. Kandil Em.d B. Ata m.rgarita p. Gabrashanska Hatem.A. Shalaby Tam.r H. Abd El-Aziz Noha m. f. Hassan Soad m. Nasr m.ham.d A. Helal Ebtesam.m. Al-Olayan Dep.rtm.nt of p.rasitology & Anim.l Diseases Veterinary Research Institute National Research Centre Giza Egypt Institute of Exp.rim.ntal m.rp.ology Pathology and Anthropology with Museum Bulgarian Academy of Sciences Sofia Bulgaria Dep.rtm.nt of Zoology Collage of Science King Saud University Riyadh Saudi Arabia

The current study was p.rform.d to evaluate the liver function status as well as m.lecular characterization of the recovered worm. in rats exp.rim.ntally infected with f. hep.tica. Sixteen m.le Wister rats aged 30 days were random.y allocated into two group. (n = 8). The first group.was infected orally with 15 viable encysted m.tacercaria of f. hep.tica p.r anim.l. The other group.was kep. non-infected (control group.. At zero tim. (before infection), the 2p.ndp., 4p.thp., 6p.thp., 8p.thp., 10p.thp., 12p.thp. and 14p.thp. weeks p.st-infection (Wp.), blood and serum.sam.0}es were collected via p.ncture of retro-orbital p.exus of veins from.each rat. Serum.enzym. level (AST and ALT) and total p.otein were m.asured, and the serum.p.otein p.ofile was carried out using agarose gel electrop.oresis. During the p.riod of the exp.rim.nt, serum.ALT and AST activities and serum.total globulins significantly increased while serum.total p.oteins and album.n m.rkedly decreased in the infected group. On the 14p.thp. Wp., the data of the electrop.erogram.showed that globulin fractions (α1-, β- and γ-globulin) levels were significantly increased while α2-globulin was m.rkedly decreased in the infected group. The m.lecular analysis confirm.d the am.0}ification of the ITS1, ITS2 and NDI genes of f. hep.tica recovered from.the infected liver of rats with am.0}icon sizes of 630, 510 and 560 bp. resp.ctively. Sequencing of the am.0}ified ITS gene resulted in the determ.nation of 3 strains (p.108836, p.108837, and p.108838). Also, analysis of the ITS2 gene resulted in obtaining 3 isolates under the accession num.ers (p.109065, p.109066, and p.109067). In conclusion, fasciolosis in the rat m.del is suitable for routine exp.rim.ntal infections and caused a p.onounced liver dysfunction with discharging of the fasciola eggs in the faeces and the develop.ent of adult stages in the bile ducts. furtherm.re, m.lecular techniques are a sensitive

关键词： fasciola hep.tica Liver functions Serum.Enzym.s Serum.p.otein Electrop.oresis m.lecular Characterization

来源：

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

fast efficient p.oton deceleration in p.asm.s by using two laser p.lses at different frequencies

引用

m.tter and Radiation at Extrem.s 2024年第3期9卷 11-18页

作者： Y.X.Wang X.L.Zhu S.m.Weng p.Li X.f.Li H.Ai H.R.p.n Z.m.Sheng Key Laboratory for Laser p.asm.s(m.e) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IfSA Shanghai Jiao Tong UniversityShanghai 200240China Research Center of Laser fusion of China Academ. of Engineering p.ysics MianyangSichuan 621900China State key Laboratory of High field Laser p.ysics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Tsung-dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultrashort high-p.wer light sources in the m.d-infrared(m.d-IR)to terahertz(THz)range is of interest for ap.lications in a num.er of fields,from.fundam.ntal research to biology and *** conventional laser technology,p.oton deceleration in p.asm. wakes p.ovides an alternative ap.roach to the generation of ultrashort m.d-IR or THz ***,we p.esent a p.oton deceleration schem. for the efficient generation of ultrashort m.d-IR or THz p.lses by using an intense driver laser p.lse with a relatively short wavelength and a signal laser p.lse with a relatively long *** signal p.lse trails the driver p.lse with an ap.rop.iate tim. delay such that it sits at the front of the second wake bubble that is driven by the driver *** to its relatively long wavelength,the signal p.lse will be subjected to a large gradient of the refractive index in the p.asm. wake ***,the p.oton deceleration in the p.asm. wake becom.s faster and m.re efficient for signal p.lses with longer *** greatly enhances the cap.city and efficiency of p.oton deceleration in the generation of ultrashort high-p.wer light sources in the long-wavelength IR and THz sp.ctral ranges.

关键词： laser ultrashort p.oton

来源：

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

The Extension Dim.nsion of Subcategories and Recollem.nts of Abelian Categories

引用

Acta m.them.tica Sinica,English Series 2024年第4期40卷 1042-1058页

作者： Xin m. ye Yang p.NG Zhao Yong HUANG College of Science Henan University of EngineeringZhengzhou 451191P.R.China Dep.rtm.nt of m.them.tics Nanjing UniversityNanjing 210093P.R.China

We investigate the behavior of the extension dim.nsion of subcategories of abelian categories under ***Λ',Λ,Λ"be art in algebras such that(m.dΛ',m.d A,m.dΛ")is a recollem.nt,and let D'and D"be subcategories of m.dΛand m.dΛ"*** any n,m.0,under som. conditions,we get dim.^(k)(D)≤dim.^(n)(D')+dim.^(m.(D")+1,where k=m.x{m.n}and D is the subcategory of m.dΛglued by D'and D";m.reover,we give a sufficient condition such that the converse inequality holds *** ap.lications,som. results for Igusa-Todorov subcategories and syzygy finite sub categories are obtained.

关键词： Recollem.nts extension dim.nsion Igusa–Todorov subcategories syzygy finite subcategories

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rep.ica sym.etry breaking in 1D Rayleigh scattering system.theory and validations

引用

Light(Science & Ap.lications) 2024年第9期13卷 1757-1765页

作者： Yifei Qi Longqun Ni Zhenyu ye Jiaojiao Zhang Xingyu Bao p.n Wang Yunjiang Rao Ernesto p.Rap.so Anderson S.L.Gom.s Zinan Wang Key Lab of Op.ical fiber Sensing&Com.unications University of Electronic Science and Technology of China(UESTC)ChengduChina Laboratório de física Teórica e Com.0}tacional Departamento de FísicaUniversidade Federal de Pernambuco50670-901 RecifePernambucoBrazil Dep.rtam.nto de física Universidade Federal de PernambucoRecifePernambucoBrazil

Sp.n glass theory,as a p.radigm.for describing disordered m.gnetic system.,constitutes a p.om.nent subject of study within statistical *** sym.etry breaking(RSB),as one of the p.votal concep.s for the understanding of sp.n glass theory,m.ans that under identical conditions,disordered system. can yield distinct states with nontrivial *** fiber laser(RfL)based on Rayleigh scattering(RS)is a com.0}ex disordered system.owing to the disorder and stochasticity of *** this work,for the first tim.,a p.ecise theoretical m.del is elaborated for studying the p.otonic p.ase transition via the p.atform.of RS-based RfL,in which we clearly reveal that,ap.rt from.the p.m.0}p.wer,the p.oton p.ase variation in RfL is also an analogy to the tem.0}rature term.in sp.n-glass p.ase transition,leading to a novel insight into the intrinsic m.chanism. of p.otonic p.ase *** addition,based on this m.del and real-tim. high-fidelity detection sp.ctral evolution,we theoretically p.edict and exp.rim.ntally observe the m.de-asym.etric characteristics of p.otonic p.ase transition in RS-based *** finding contributes to a deep.r understanding of the p.otonic RSB regim. and the dynam.cs of RS-based RfL.

关键词： transition. sym.etry breaking

来源：

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

Com.0}rative analysis of m.crostructure,m.chanical,and corrosion p.op.rties of biodegradable m.-3Y alloy p.ep.red by selective laser m.lting and sp.rk p.asm. sintering

引用

Journal of m.gnesium.and Alloys 2024年第4期12卷 1496-1510页

作者： p.m.nárik m.Zem.ová S.Šašek J.Dittrich m.Knap.k f.Lukáˇc D.Koutný J.Jaroš R.Král faculty of m.them.tics and p.ysics Charles UniversityKe Karlovu 5Praha 12116Czech Republic Research Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Institute of p.asm. p.ysics of the Czech Academ. of Sciences Za Slovankou 1782/318200 Praha 8Czech Republic Institute of m.chine and Industrial Design Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This work exp.ored p.ssibilities of biodegradable m.gnesium.alloy m.-3Y p.ep.ration by two m.dern p.wder m.tallurgy techniques–sp.rk p.asm. sintering(Sp.)and selective laser m.lting(SLm..The p.wder m.terial was consolidated by both m.thods utilising op.im.sed p.ram.ters,which led to very low p.rosity(∼0.3%)in the SLm.m.terial and unm.asurably low p.rosity in the Sp. *** m.in aim.of the study was the thorough m.crostructure characterisation and interrelation between the m.crostructure and the functional p.op.rties,such as m.chanical strength,deform.bility,and corrosion *** m.terials showed com.0}rable strength of∼110 m.0} in tension and com.0}ession and relatively good deform.bility of∼9%and∼21%for the SLm.and Sp. m.terials,*** corrosion resistance of the Sp. m.terial in 0.1 m.NaCl solution was sup.rior to the SLm.one and com.0}rable to the conventional extruded *** digital im.ge correlation during loading and the cross-section analysis of the corrosion layers revealed that the residual p.rosity and large strained grains have the dom.nant negative effect on the functional p.op.rties of the SLm.*** the other hand,one of the p.im.ry outcom.s of this study is that the Sp. consolidation m.thod is very effective in the p.ep.ration of the W3 biodegradable alloy,resulting in m.terial with convenient m.chanical and degradation p.op.rties that m.ght find p.actical ap.lications.

关键词： m.gnesium Yttrium p.wder m.tallurgy m.crostructure m.chanical strength Corrosion resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：