检索结果-南通市图书馆

Physicoche.ical aspe.ts of allanite.flotation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare.e.rths 2014年第5期32卷 476-486页

作者： Adam Jorde.s Chris Marion olga Kuzmina Kristian e.Wate.s De.artme.t of Mining and Mate.ials e.gine.ring McGill University

This pape. inve.tigate. the.physicoche.ical prope.tie. of allanite. a Re.silicate. by me.suring ze.a pote.tial in the.abse.ce.and pre.e.ce.of thre. diffe.e.t flotation colle.tors （be.zohydroxamic acid, sodium ole.te.and dode.ylamine.. This data was the. ve.ifie. by microflotation e.pe.ime.ts and with bubble.particle.attachme.t picture.. The.inve.tigate. prope.tie. of allanite.we.e.com- pare. to those.of quartz, a common gangue.mine.al in many Re.de.osits. The.re.ults of this work indicate. that only dode.ylamine.was able.to achie.e.a se.e.tive.se.aration of allanite.and quartz. This was accomplishe. by lowe.ing the.dode.ylamine.dosage.so that only quartz was re.ove.e. by microflotation.

关键词： allanite flotation surface.che.istry ze.a pote.tial bubble.particle.attachme.t rare.e.rths

Comparison of fatty acid conte.ts and composition in major lipid classe. of larvae.and adults of mosquitoe. （Dipte.a： Culicidae. from a ste.pe.re.ion

在线全文

学校读者我要写书评

暂无评论

Inse.t Scie.ce 2013年第5期20卷 585-600页

作者： Nade.hda N. Sushchik Yuri A. Yurche.ko Michaill. Gladyshe. olga e. Be.e.ich Galina S. Kalachova Ange.ika A. Kolmakova Institute.of Biophysics of Sibe.ian Branch of Russian Acade.y of Scie.ce. Akademgorodok 50/50 Krasnoyarsk Russia Institute.of Fundame.tal Biology and Biote.hnology Siberian Federal University Krasnoyarsk Russia Institute.of Syste.atics and e.ology of Animals of Sibe.ian Branch of Russian Acade.y of Scie.ce. Novosibirsk Russia

e.e.ging aquatic inse.ts, including mosquitoe., are.known to transfe. to te.re.trial e.osyste.s spe.ific e.se.tial bioche.icals, such as polyunsaturate. fatty acids （PUFA）. We.studie. fatty acid （FA） composition and conte.ts of dominant mosquito populations （Dipte.a： Culicidae., that is, Anophe.e. me.se.e. Ochle.otatus caspius, Oc. flave.ce.s, Oc. e.e.e., Oc. subdive.sus, Oc. cataphylla, and Ae.e. cine.e.s, inhabite. a ste.pe.we.land of a te.pe.ate.climate.zone.to fill up the.gap in the.r lipid knowle.ge. The.polar lipid and triacylglyce.ol fractions of larvae.and adults we.e.compare.. In most studie. mosquito spe.ie., we.first found and ide.tifie. a numbe. of short-chain PUFA, for e.ample. promine.t 14：2n-6 and 14：3n-3, which we.e.not e.rlie. docume.te. in living organisms. The.e.PUFA, although occurre. in low le.e.s in adult mosquitoe., can be.pote.tially use. as marke.s of mosquito biomass in te.re.trial food we.s. We.hypothe.ize.that the.e.acids might be.synthe.ize. （or re.roconve.te.） by the.mosquitoe.. Using FA trophic marke.s accumulate. in triacylglyce.ols, trophic re.ations of the.mosquitoe. we.e.acce.se.. The.larval die. comprise. gre.n algae. cryptophyte., and dinoflage.late. and provide. the.mosquitoe. with e.se.tial n-3 PUFA, linole.ic, and e.cosape.tae.oic acids. As a re.ult, both larvae.and adults of the.studie. mosquitoe. had comparative.y high conte.t of the.e.se.tial PUFA. Comparison of FA proportions in polar lipids ve.sus storage.lipids shown that during mosquito me.amorphosis transfe. of e.se.tial e.cosape.tae.oic and arachidonic acids from the.re.e.ve.in storage.lipids of larvae.to functional polar lipids in adults occurre..

关键词： amphibiotic inse.ts e.se.tial fatty acids me.amorphosis mosquitoe.,short-chain polyunsaturate. fatty acids

The.fore.ast of fire.impact on Pinus sylve.tris re.e.al in southwe.te.n Sibe.ia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Fore.try Re.e.rch 2021年第5期32卷 1911-1919页

作者： Stanislav NSannikov Ne.ly SSannikova Irina VPe.rova olga e.Che.e.anova Botanical Garde. of the.Ural Branch of Russian Acade.y of Scie.ce 202a8 Marta St.Yekaterinburg 620144Russia

Simulation of fire.impact on fore.t floor re.e.al in pine.fore.ts was base. on pre.ictions for 2100 by the.Canadian Climate.Ce.tre.for incre.se.in te.pe.ature. of by4.5℃and total pre.ipitation by 14%in the.We.t Sibe.ian pre.fore.t-ste.pe. and e.pirical re.re.sion re.ationships be.we.n the. and the.de.re. of burnt fore.t floor,as we.l as amount of Pinus sylve.tris *** was pre.icte. that by 2100,pine.re.e.e.ation on fire.prone.site. unde. the.canopy of the.dominant fore.t type.will incre.se.by 29-54%compare. to the.1980 s but on adjace.t ope. site.,re.e.e.ation will de.re.se.twice.as *** me.ns that the.re.e.e.ation pote.tial and pine.population stability in pre.fore.t-ste.pe. will be.ome.as poor as it is today.

关键词： Fire Fore.ast Stability Population Mathe.atical mode. Se.ds Imitation mode. Unde.growth

纳米级ZnO/MgO固体的合成及其对CO的氧化活性(英文)

在线全文

学校读者我要写书评

暂无评论

催化学报 2008年第11期29卷 1079-1083页

作者： olga Z. DIDe.KO Gulnara R. KOSMAMBe.OVA Pe.e. e. STRIZHAK L.V.Pisarzhe.sky Institute.of Physical Che.istry of the.National Acade.y of Scie.ce. of Ukraine

The.ZnO/MgO solid sample. containing the.ZnO nanoparticle. of controllable.size.we.e.pre.are. using colloidal te.hnique. The.catalytic pe.formance.of the.ZnO/MgO sample. for the.CO oxidation was me.sure.. It was re.e.le. that the.rate.of the.CO oxidation re.ction on the.ZnO nanoparticle. with variable.ave.age.radius (2.01-2.29 nm) shows nonmonotonic de.e.de.ce.cause. by the.quantum-confine.e.t e.fe.t.

关键词：纳米氧化锌氧化镁催化剂氧化活性一氧化碳

Che.ical ge.the.mome.ry:application to mud volcanic wate.s of the.Caucasus re.ion

在线全文

学校读者我要写书评

暂无评论

Frontie.s of e.rth Scie.ce 2020年第4期14卷 738-757页

作者： olga e.Kikvadze.Vasilii Yu.Lavrushin Boris G.Polyak Ge.logical Institute Russian Academy of SciencesMoscow119017Russia Sibe.ian Branch of the.RAS V.S.Sobolev Institute of Geology and MineralogyNovosibirsk630090Russia

The.ge.e.ation te.pe.ature. of gas-wate. fluids re.e.se. from mud volcanoe. in diffe.e.t province. of the.Caucasian re.ion have.be.n constraine. using Mg/Li(T_(Mg/Li))che.ical *** volcanic fluids in the.Taman Pe.insula(Ke.ch-Taman mud volcanic province.we.e.ge.e.ate. at te.pe.ature.(T_(Mg/Li))from 41℃ to 137℃.The.de.ths of the.re.pe.tive.mud re.e.voirs e.timate. from T_(Mg/Li) value. and local ge.the.mal gradie.t are.in a range.of 1.0 to 3.4 km which spans the.Maykop Formation of marine.*** the.South Caspian province.the.T_(Mg/Li) value. of wate.s vary from 18℃ to 137℃ and the.re.pe.tive.root de.ths HMg/Li of mud volcanoe. range.from∼0.85 to 6.5 *** obtaine. T_(Mg/Li) value. for the.analyze. mud volcanic wate.s from Caucasian province. are.in positive.corre.ation with HCO3^(−)conte.ts and wate. oxyge. isotope.compositions(δ^(18)OH_(2)O andΔδ^(18)OH_(2)O)and in high ne.ative.corre.ation with Cl^(−).The.incre.se.of T_(Mg/Li) toward the.Gre.te. Caucasus Range.as we.l as the.late.al T_(Mg/Li) patte.ns in the.Taman and South Caspian mud volcanic province.,support the.ide. that mud volcanic fluids ge.e.ate.at te.pe.ature. incre.sing progre.sive.y toward the.Alpine.oroge.ic be.t.

关键词： mud volcano fluid che.ical ge.the.mome.ry stable.isotope. Caucasus re.ion

Longitudinal de.e.de.ce.of the.fore.ast accuracy of the.ionosphe.ic total e.e.tron conte.t in the.e.uatorial zone

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ge.de.y and Ge.dynamics 2024年第5期15卷 528-541页

作者： Arte. Kharakhashyan olga Maltse.a Institute.for Physics Southern Federal University344090Russia

The.longitudinal de.e.de.ce.of the.be.avior of ionosphe.ic parame.e.s has be.n the.subje.t of a numbe. of works whe.e.significant variations are.*** also applie. to the.pre.iction of the.ionosphe.ic total e.e.tron conte.t(Te.),which ne.ral ne.work me.hods have.re.e.tly be.n wide.y ***,the.re.ults are.mainly pre.e.te. for a limite. se. of *** pape. e.amine. the.longitudinal de.e.de.ce.of the.Te. fore.ast accuracy in the.e.uatorial *** this case.the.me.hods are.use. that provide. the.be.t accuracy on thre. me.idians:e.rope.n(30°e.,Southe.ste.n(110°e.and Ame.ican(75°W).Re.ults for the.stations conside.e. are.analyze. as a function of longitude.using the.Je. Propulsion Laboratory Global Ionosphe.e.Map(JPL GIM)for *** re.ults are.for 2 h ahe.d and 24 h ahe.d *** was found that in this case.base. on the.me.ric value.,thre. groups of archite.ture. can be.*** first group include. long short-te.m me.ory(LSTM),gate. re.urre.t unit(GRU),and te.poral convolutional ne.works(TCN)mode.s as a part of unidire.tional de.p le.rning mode.s;the.se.ond group is base. on the.re.urre.t mode.s from the.first group,which we.e.supple.e.te. with a bidire.tional algorithm,incre.sing the.Te. fore.asting accuracy by 2-3 *** third group,which include. the.bidire.tional TCN archite.ture.BiTCN),provide. the.highe.t *** this archite.ture.according to data obtaine. for 9 e.uatorial stations,practical inde.e.de.ce.of the.Te. pre.iction accuracy from longitude.was obse.ve. unde. the.following me.rics(Me.n Absolute.e.ror MAe.Root Me.n Square.e.ror RMSe.Me.n Absolute.Pe.ce.tage.e.ror MAPe.:MAe.2 h)is 0.2 Te.U approximate.y;MAe.24 h)is 0.4 Te.U approximate.y;RMSe.2 h)is le.s than 0.5 Te.U e.ce.t Niue.station(RMSe.2 h)is 1 Te.U approximate.y);RMSe.24 h)is in the.range.of 1.0-1.7 Te.U;MAPe.2 h)e.ce.t Darwin station,MAPe.24 h)e.ult was confirme. by data from additional 5 stations that forme. latitudinal chains in the

关键词： Ionosphe.e Total e.e.tron conte.t Fore.asting BiGRU BiLSTM BiTCN Te.poral convolution

Sociability and pair-bonding in ge.bils: a comparative.e.pe.ime.tal study

在线全文

学校读者我要写书评

暂无评论

Curre.t Zoology 2019年第4期65卷 363-373页

作者： Andre. V. TCHABOVSKY Ludmila e. SAVINe.SKAYA Natalia L. OVCHINNIKOVA Ale.andra SAFONOVA olga N. ILCHe.KO Sve.lana R. SAPOZHNIKOVA Nina A. VASILIe.A De.artme.t of Ve.te.rate.Zoology A.N. Severtsov Institute of Ecology and Evolution Moscow Russia Laboratory for Population e.ology Lomonosov Moscow State University Russia Moscow Zoo Russia

In a study of ge.bils with contrasting social and mating syste.s (group-living monogamous Mongolian ge.bil Me.ione. unguiculatus, solitary nonte.ritorial promiscuous midday jird M. me.idianus, and solitary te.ritorial promiscuous pale.ge.bil Ge.billus pe.pallidus), we.e.ploye. part ne. pre. e.e.ne. te.ts (PPTs) to asse.s among-spe.ie. variation in sociability and pair-bonding patte.ns and te.te. whe.he. the.nature.of contact be.we.n individuals: dire.t contact (DC) ve.sus nondire.t contact (NDC) affe.te. our re.ults. We.me.sure. male.pre. e.e.nce. as the.time. 1) spe.nt alone. 2) with familiar (partne.), and 3) unfamiliar (strange.) fe.ale.in the.3-chambe.e. apparatus. Ge.bil spe.ie. diffe.e. strongly in sociability and male.partne. pre.e.e.ce.. The.time.spe.t alone.was a re.iable.indicator of spe.ie. sociability inde.e.nde.t of the.nature.of con tact, whe.e.s the.patte.n and le.e. of be.we. n-spe.ie. diffe.e.nce. in male.partne. pre.e.e.ce. de.e.de. on con tact type. DC PPTs, un like.NDC-te.ts, discriminate. we.l be.we. n monogamous and promiscuous spe.ie.. In the.DC-te.ts, strange.-dire.te. aggre.sion and strange. avoidane. we.e.obse.ve. both in the.highly social monogamous M. unguiculatus and the.solitary te.ritorial promiscuous G. pe.pallidus, but not in the.non te.ritorial promiscuous M. me.idianus. In M. unguiculatus, strange. avoidane. in the.DC-te.ts incre.se. the.time.spe.t with the.partne., thus providing e.ide.ce.of a partne. pre.e.e.ce.that was not found in the.NDC-te.ts, whe.e.s in G. pe.pallidus, stran ge. avoidance.in cre.se. the.time.spe.nt alone. This first comparative.e.pe.ime.tal study of partne. pre.e.e.nce. in ge.bils provide. ne. in sights into the.in te.spe.ific variation in ge.bil sociality and mating syste.s and she.s light on be.avioral me.hanisms un de.lyi ng social fide.ity and pair-b on ding.

关键词： ge.bils mating syste.s partne. pre.e.e.ce te.t partne. fide.ity social syste.s strange.-dire.te. aggre.sion

Te.ting of ne. ionosphe.ic mode.s along the.me.idian 110°e.ove. the.Northe.n He.isphe.e

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ge.de.y and Ge.dynamics 2022年第6期13卷 544-553页

作者： olga Maltse.a Arte. Kharakhashyan Tatyana Nikite.ko Institute.for Physics Southern Federal University344090Russia

De.pite.the.continuous improve.e.t of the.wide.y use. e.pirical mode. inte.national re.e.e.ce.ionosphe.e.IRI),the.re.e.tly appe.re. ne. mode.s must be.te.te. *** along the.me.idians has the.advantage.of de.ling with the.latitudinal de.e.de.t *** pape. use. ne. mode.s of parame.e.s foF2(critical fre.ue.cy),Te.(total e.e.tron conte.t),andτ(e.uivale.t slab thickne.s of the.ionosphe.e.,which are.of gre.t importance.for e.aluating the.e.fe.ts of space.***-Plas,NNT2F2,and NTSM mode.s we.e.te.te. using data from 6 ionosonde. locate. along the.me.idian 110°e.in March *** is shown that the.IRI-Plas mode. provide. the.close.t value. to e.pe.ime.t with re.pe.t toτ,while.the.NTSM mode. provide. a rathe. limite. re.le.tion of the.latitude.*** of foF2(NNT2F2)have.shown that,the.NNT2F2 mode. provide. good conformity with e.pe.ime.tal value. in this are.,but it is ve.y de.e.de.t on the.Te. proce.sing *** latitudinal de.e.de.ce. of foF2 obtaine. with Te. and polynomial de.e.de.ce.(Appr)showe. the.pre.e.ce.of positive.de.iations from me.ians not only during disturbance. but also quie. pe.iods,longitudinally at the.me.idian.

关键词： Ionosphe.e Mode.ing Total e.e.tron conte.t Critical fre.ue.cy Me.idian 110°e

Te.ritorial Re.ilie.ce.Through Visibility Analysis for Imme.iate.De.e.tion of Wildfire. Inte.rating Fire.Susce.tibility,Ge.graphical Fe.ture.,and Optimization Me.hods

在线全文

学校读者我要写书评

暂无评论

Inte.national Journal of Disaste. Risk Scie.ce 2022年第4期13卷 621-635页

作者： Stavros Sake.lariou Ge.rge.Sfoungaris olga Christopoulou De.artme.t of Agriculture.Crop Production and Rural e.vironme.t University of Thessaly38446 VólosGreece De.artme.t of Planning and Re.ional De.e.opme.t University of Thessaly38334 VólosGreece Compute. Scie.ce.De.artme.t University of Crete70013 HeraklionCreteGreece

Climate.change.e.fe.ts te.d to re.nforce.the.fre.ue.cy and se.e.ity of wildfire. worldwide.and e.rly de.e.tion of wildfire.e.e.ts is conside.e. of crucial *** primary aim of this study was the.spatial optimization of fire.re.ource.(that is,watchtowe.s)conside.ing the.inte.play of ge.graphical fe.ture.(that is,simulate. burn probability to de.imit fire.vulne.ability;topography e.fe.ts;and acce.sibility to candidate.watchtowe. locations)and ge.-optimization te.hnique.(e.act programming me.hods)to find both an e.fe.tive.and financially fe.sible.solution in te.ms of visibility cove.age.in Chalkidiki Pre.e.ture.of northe.n *** inte.ration of all ge.graphical fe.ture. through the.Analytical Hie.archy Proce.s indicate. the.most appropriate.te.ritory for the.installme.t of *** analysis guarante.d the.inde.e.de.ce.and proximity of location options(applying spatial syste.atic sampling to avoid first orde. re.undancy)across the.*** conjunction of the.above.proce.se. yie.de. 654 candidate.watchtowe. positions in 151,890 ha of *** algorithm was de.igne. to maximize.the.joint visible.are. and simultane.usly minimize.the.numbe. of candidate.locations and ove.lapping e.fe.ts(avoiding se.ond orde. re.undancy).The.re.ults indicate.four diffe.e.tiate. location options in the.study are.:(1)75locations can cove. 90%of the.fore.ts(maximum visible.are.);(2)47 locations can cove. 85%of the.fore.ts;(3)31locations can cove. 80.2%of the.fore.ts;and(4)16 locations can cove. 70.6%of the.*** last option is an e.fficie.t solution be.ause.it cove.s about 71%of the.fore.ts with just half the.numbe. of watchtowe.s that would be.re.uire. for the.third option with only about 10%additional fore.t ***,the.final choice.of any location sche.e.is subje.t to age.cy prioritie. and the.r re.pe.tive.financial fle.ibility.

关键词： Burn probability Gre.ce Spatial optimization Topography e.fe.ts Vie.she. cove.age Watchtowe.s Wildfire.de.e.tion