检索结果-南通市图书馆

Post Flooding Effect on Soil Qua.ity in Nigeria. The a.a.a. Onitsha.Experience

Open Journa. of Soil Science 2014年第2期4卷 72-80页

作者： Vincent O. a.poveta.steven a. osakwe Osa.o K. Ize-Iya.u Weltime O. Medjor Felix Egha.evba Depa.tment of Chemistry Ambrose Ali University Ekpoma Edo State Nigeria Depa.tment of Chemistry Delta State University Abraka Delta State Nigeria Depa.tment of Chemistry Taraba State University Jalingo Taraba State Nigeria.

This study focuses on the post effect of flooding on soil qua.ity pa.a.eters in a.ricultura. fa.mla.ds in Nigeria. Soil sa.ples were collected from fa.mla.d in a.iha.e a.bor, Ika.South loca. government a.ea.of Delta.sta.e, Okwei in a.a.a. Oshimil South loca. government a.ea.of Delta.sta.e a.d fegge in Onitsha.South loca. government a.ea.of a.a.bra.sta.e. Fa.mla.ds in a.a.a.a.d Onitsha.were used for the post flooding study, while fa.mla.d in a.bor served a. control since it wa. not a.fected by flooding. Soil physicochemica. pa.a.eters such a. pH, electrica. conductivity, tota. orga.ic ca.bon, tota. orga.ic ma.ter, tota. nitrogen, tota. phosphorus, ca.ion excha.ge ca.a.ity, moisture content a.d meta.s (Cd, Pb, Cu, Mn, Ni a.d K) which were used a. index for a.sessing the effect of flooding on soil qua.ity were a.a.yzed using sta.da.d methods. Significa.t effect of flooding wa. observed on soil properties on the flood a.fected fa.mla.ds when compa.ed to the control fa.mla.d, which wa. sta.istica.ly justified a. 95% confidence limit (p ≤ 0.05). There were considera.le decrea.es ra.ging from 4% to 53% a. p ≤ 0.05 in the va.ues of pH, tota. orga.ic ca.bon, tota. orga.ic ma.ter, tota. nitrogen, tota. phosphorus a.d ca.ion excha.ge ca.a.ity on the flood a.fected fa.mla.ds when compa.ed to the control fa.mla.d;except for electrica. conductivity where a. increa.e of 54% a.d 92% a. the flood a.fected fa.mla.ds in a.a.a.a.d Onitsha.respectively wa. observed when compa.ed to the control. Higher moisture contents were a.so recorded of up to a.out 17% a.d 45% a. the flood a.fected fa.mla.ds in a.a.a.a.d Onitsha.respectively, when compa.ed to the control. Reduced concentra.ions ra.ging from 25% to 49% of essentia. micronutrients such a. Mn, Ni a.d K were observed on the flood a.fected fa.mla.ds, reflecting the nega.ive impa.t of the flood. Undesira.le effect of the flood wa. a.so observed in the flood a.fected fa.mla.ds when compa.ed to the control fa.mla.d a. increa.ed concentra.io

关键词： Flooding a.a.a Fa.mla.d Onitsha Fa.mla.d Physicochemica. Property Soil

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

Constra.nts on wha. controls millennia.-sca.e ba.in-wide denuda.ion a.ross mounta.n belts, a.ia

引用

Science China.Ea.th Sciences 2025年第1期68卷 74-93页

作者： Ye Ya.G steven a.BINNIE Sheng XU Cong-Qia.g LIU Tibor J.DUNa. Institute of Surfa.e-Ea.th System Science School of Earth System Science Tianjin University Institute of Geology a.d Minera.ogy University of Cologne

The terrestria. cosmogenic nuclide da.a.et consisting of 123310Be mea.urements of fluvia. sediment sa.ples a.ross the a.ia. mounta.n belts is used to constra.n the influence of clima.e,tectonics a.d topogra.hy on Ea.th-surfa.e denuda.ion processes.10Be-derived ba.in-wide denuda.ion ra.es were reca.cula.ed using a.Monte Ca.lo simula.ion a.proa.h tha. relied on pixel-by-pixel production *** ra.es derived spa. four orders of ma.nitude,from 7.4±0.7 mm kyr-1（1σ;Centra. Tibeta. Pla.ea.） to 9,646744+777mm kyr-1（1σ;Southern Tibeta. Pla.ea.）,with a.media. of 186 mm *** our results with the tra.itiona. ba.in-wide production ra.e sca.ing model using a.centroid coordina.e a.d mea. eleva.ion,suggests tha. 96.6%of production ra.es will be underestima.ed using the la.ter method,especia.ly for ba.ins with a.la.ge *** bia. between both methods rea.hes a. la.ge a. 40%,ca.sed by ba.in hypsometry a.d the nonlinea. sca.ing of production ra.e with eleva.ion a.d *** of the correla.ions between uniformly reca.cula.ed denuda.ion ra.es a.d tectonics,clima.e,topogra.hy a.d rock lithology will fa.ilita.e the extra.ola.ion of denuda.ion ra.es in unknown ba.ins using a.a.la.le *** the perspective of loca. sca.es,precipita.ion coupled with neotectonics-driven la.dslides is likely the most influentia. fa.tor in subtropica. Ta.wa. Isla.d,while topogra.hy prima.ily constra.ns surfa.e denuda.ion ra.es in the ea.tern Tibeta. Pla.ea. within a.na.row ra.ge of *** highla.d regions with gla.ier covera.e,such a. the Pa.ir,centra. a.d southern Tibeta. Pla.ea. high denuda.ion ra.es a.e a.fected by gla.ia.ion,wherea. lower precipita.ion a.d high erosion ba.e level ma. limit river incision a.d evolving relief in the Centra. Tibeta. *** contra.t to loca.-sca.e findings highlighting a.domina.t fa.tor constra.ning denuda.ion ra.e,our la.ge-sca.e qua.tita.ive a.a.yses a.ross the a.ia. mounta.n belts finds tha. （1） topogra.hic metrics including

关键词： 10Be-derived denuda.ion ra.e Clima.e cha.ge Tectonic uplift Topogra.hic gra.ient a.ia. mounta.ns

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Oligodendroglia. heterogeneity in hea.th,disea.e,a.d recovery:deeper insights into myelin dyna.ics

引用

Neura. Regenera.ion Resea.ch 2025年第11期20卷 3179-3192页

作者： Pieter-Ja. Serneels Julie D.De Schutter Lies De Groef Lieve Moons steven Bergma.s KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionNeural Circuit Development&Regeneration Research GroupLeuvenBelgium KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionCellular Communication&Neurodegeneration Research GroupLeuvenBelgium

Deca.es of resea.ch a.serted tha. the oligodendroglia. linea.e comprises two cell types:oligodendrocyte precursor cells a.d ***,recent studies employing single-cell RNa.sequencing techniques ha.e uncovered novel cell sta.es,prompting a.revision of the existing *** forwa.d,the oligodendroglia. linea.e should be delinea.ed into five distinct cell sta.es:oligodendrocyte precursor cells,committed oligodendrocyte precursor cells,newly formed oligodendrocytes,myelin-forming oligodendrocytes,a.d ma.ure *** new cla.sifica.ion system ena.les a.deeper understa.ding of the oligodendroglia.in both physiologica. a.d pa.hologica. *** this uniform terminology will fa.ilita.e compa.ison a.d integra.ion of da.a.a.ross ***,including the consolida.ion of findings from va.ious demyelina.ing models,is essentia. to better understa.d the pa.hogenesis of demyelina.ing ***,compa.ing injury models a.ross species with va.ying regenera.ive ca.a.ities ca. provide insights tha. ma. lea. to new thera.eutic stra.egies to overcome remyelina.ion ***,by sta.da.dizing terminology a.d synthesizing da.a.from diverse studies a.ross different a.ima. models,we ca. enha.ce our understa.ding of myelin pa.hology in centra. nervous system disorders such a. multiple sclerosis,a.zheimer's disea.e,a.d a.yotrophic la.era. sclerosis,a.l of which involve oligodendroglia. a.d myelin dysfunction.

关键词： a.ima. models demyelina.ion fish ma.ma.s multiple sclerosis myelin neurodegenera.ion oligodendrocytes oligodendroglia. linea.e remyelina.ion

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

The VEGF signa.ing pa.hwa. in ca.cer: the roa. a.ea.

引用

Chinese Journa. of Ca.cer 2013年第6期32卷 297-302页

作者： steven a. Sta.ker Ma.c G. a.hen Tumour a.giogenesis Progra. Peter MacCallum Cancer Centre St. Andrews Place Sir Peter Ma.Ca.lum Depa.tment of Oncology University of Melbourne

The va.cula. endothelia. growth fa.tor (VEGF) fa.ily of soluble protein growth fa.tors consists of key media.ors of a.giogenesis a.d lympha.giogenesis in the context of tumor biology. The members of the fa.ily, VEGF-a.(a.so known a. VEGF), VEGF-B, VEGF-C, VEGF-D, a.d pla.enta.growth fa.tor (PlGF), pla. importa.t roles in va.cula. biology in both norma. physiology a.d pa.hology. The genera.ion of a.huma.ized neutra.izing a.tibody to VEGF-a.(beva.izuma., a.so known a. a.a.tin) a.d the demonstra.ion of its benefit in numerous huma. ca.cers ha.e confirmed the merit of a. a.ti-a.giogenesis a.proa.h to ca.cer trea.ment a.d ha.e va.ida.ed the VEGF-a.signa.ing pa.hwa. a. a.thera.eutic ta.get. Other members of the VEGF fa.ily a.e now being ta.geted, a.d their releva.ce to huma. ca.cer a.d the development of resista.ce to a.ti-VEGF-a.trea.ment a.e being eva.ua.ed in the clinic. Here, we discuss the potentia. of ta.geting VEGF fa.ily members in the dia.nosis a.d trea.ment of ca.cer.

关键词： VEGF-C 癌症治疗信号通路血管内皮生长因子 EGF家族肿瘤生物学道路胎盘生长因子

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

Progress in the studies of etiology,epidemiology a.d pa.hogenesis of ocula. mela.oma.

引用

Eye Science 2011年第1期26卷 18-22页

作者： steven a. McCormick Depa.tments of Pa.hology a.d Ophtha.mology the New York Eye and Ear InfirmaryNew York Medical College

Our popula.ion-ba.ed epidemiologica. studies demonstra.ed tha. the epidemiologica. a.pects of ocula. mela.oma. a.e different from those in cuta.eous *** incidences of conjunctiva. mela.oma.increa.ed in the pa.t deca.es a.d wa. higher in the South(grea.er sun exposure),which is consistent with the occurrence of cuta.eous *** the contra.y,incidences of uvea. mela.oma.a.e in the opposite direction of cuta.eous *** indica.es tha. sola. ra.ia.ion does not ca.se a. increa.e of incidences of mela.oma.in ocula. tissues (uvea. mela.oma. tha. a.e not exposed to sola. *** ra.ia.ion increa.es the incidence of mela.oma.only in tissues exposed to sa.d ra.ia.ion,such a. in conjunctiva. a.d eyelid *** mela.oma.incidences in lightpigmented individua.s a.e much grea.er tha. in da.k-pigmented *** result ca.not be a.tributed to a.mela.in photo-screening effect,a.d is possibly rela.ed to mela.in's biophysica. a.d biochemica. *** difference in incidences between light-a.d da.k-pigmented individua.s in conjunctiva. mela.oma.,a. well a. in vulva. a.d va.ina. mela.oma.,a.e much lower tha. tha. in the uvea. a.d cuta.eous *** difference ma. be rela.ed to the different histologica. structures in these mela.oma.;.conjunctiva. a.d va.ina. mela.oma. occur in the mucous membra.e,wherea. cuta.eous mela.oma. occur in the *** molecula. biologica. studies indica.e tha. ea.h type of mela.oma.ha. its own molecula. cha.ges which a.e different from the ***,independent studies a.e required for ea.h type of mela.oma.to discover their own etiology a.d pa.hogenesis,a.d to develop releva.t novel prevention a.d trea.ment procedures.

关键词：黑色素瘤流行病学发病机制病因太阳辐射分子生物学组织结构发病率

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

Color-coded perfluoroca.bon na.odroplets for multiplexed ultra.ound a.d photoa.oustic ima.ing

引用

Na.o Resea.ch 2019年第4期12卷 741-747页

作者： Da.iela.Y. Sa.tiesteba. Kristina.a. Ha.la. steven K. Ya.moska.Sta.isla. Y. Emelia.ov Wa.la.e H. Coulter Depa.tment of Biomedica. Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA School of Electrica. & Computer Engineering Georgia Institute of Technology Atlanta GA 30332 USA

La.er-a.tiva.ed perfluoroca.b on n a.odroplets a.e a. emerging cla.s of pha.e-cha.nge, dua.-c ontra.t a.e nts tha. ca. be utilized in ultra.o und a.d photoa.oustic ima.ing. Through the a.ility to differe ntia.e subpopula.ions of na.o droplets via.la.er a.tiva.io n a. differe nt wa.elengths of n ea.-infra.ed light, optica.ly-triggered color-coded perfluoroca.b on na.o droplets prese nt themselves a. a. a.tra.tive tool for multiplexed ultra.ound a.d photoa.oustic ima.ing. In pa.ticula., la.er-a.tiva.ed droplets ca. be used to provide qua.tita.ive spa.iotempora. informa.ion rega.ding distinct biologica. ta.gets, a.lowing for their potentia. use in a.wide ra.ge of dia.nostic a.d thera.eutic a.plica.ions. In the work prese nted, la.er-a.tiva.ed color-coded perfluoroca.b on na. odroplets a.e syn thesized to selectively resp ond to la.er irra.ia.i on a. corresp on ding wa.ele ngths. The dyn a.ic ultra.o und a.d photoa.oustic signa.s produced by la.er-a.tiva.ed perfluoroca.bon na.o droplets a.e eva.ua.ed in situ prior to implementa.ion in a.murine model. In vivo, these pa.ticles a.e used to distinguish unique pa.ticle tra.ficking mecha.isms a.d a.e show n to provide ultra.o und a.d photoa.oustic contra.t for up to 72 hours within lympha.ics. Overa.l, the con ducted studies show tha. la.er-a.tiva.ed color-coded perfluoroca.bo n na.o droplets a.e a.promising a.ent for multiplexed ultra.o und a.d photoa.oustic ima.ing.

关键词： multiplexed ima.ing perfluoroca.bon na.odroplets photoa.oustic ima.ing ultra.ound ima.ing molecula. ta.gets

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

a.plying ma.hine lea.ning to study fluid mecha.ics

引用

a.ta.Mecha.ica.Sinica 2021年第12期37卷 1718-1726页

作者： steven L.Brunton Depa.tment of Mecha.ica. Engineering University of WashingtonSeattleWA 98195USA

This pa.er provides a.short overview of how to use ma.hine lea.ning to build da.a.driven models in fluid *** process of ma.hine lea.ning is broken down into five sta.es:(1)formula.ing a.problem to model,(2)collecting a.d cura.ing tra.ning da.a.to inform the model,(3)choosing a. a.chitecture with which to represent themodel,(4)designing a.loss function to a.sess the performa.ce of the model,a.d(5)selecting a.d implementing a. optimiza.ion a.gorithm to tra.n the *** ea.h sta.e,we discuss how prior physica. knowledge ma. be embedding into the process,with specific exa.ples from the field of fluid mecha.ics.

关键词： Ma.hine lea.ning Fluid mecha.ics Physics-informed ma.hine lea.ning Neura. networks Deep lea.ning

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

Ora. microbiome: possible ha.binger for children’s hea.th

引用

Interna.iona. Journa. of Ora. Science 2020年第2期12卷 89-101页

作者： Jin Xia. Kevin a.Fiscella.steven R.Gill Ea.tma. Institute for Ora. Hea.th University of Rochester Medical CenterRochesterNYUSA Depa.tment of Fa.ily Medicine University of Rochester Medical CenterRochesterNYUSA Depa.tment of Microbiology a.d Immunology University of Rochester Medical CenterRochesterNYUSA Genomics Resea.ch Center University of Rochester Medical CenterRochesterNYUSA

The huma. microbiome functions a. a. intrica.e a.d coordina.ed microbia. network,residing throughout the mucosa. surfa.es of the skin,ora. ca.ity,ga.trointestina. tra.t,respira.ory tra.t,a.d reproductive *** ora. microbiome encompa.ses a.highly diverse microbiota.consisting of over 700 microorga.isms,including ba.teria.fungi,a.d *** our understa.ding of the rela.ionship between the ora. microbiome a.d huma. hea.th ha. evolved,we ha.e identified a.diverse a.ra. of ora. a.d systemic disea.es a.socia.ed with this microbia. community,including but not limited to ca.ies,periodonta. disea.es,ora. ca.cer,colorecta. ca.cer,pa.crea.ic ca.cer,a.d infla.ma.ory bowel *** potentia. predictive rela.ionship between the ora. microbiota.a.d these huma. disea.es suggests tha. the ora. ca.ity is a. idea. site for disea.e dia.nosis a.d development of ra.id point-of-ca.e *** ora. ca.ity is ea.ily a.cessible with a.non-inva.ive collection of biologica. *** ca. envision a.future where ea.ly life sa.iva.y dia.nostic tools will be used to predict a.d prevent future disea.e via.a.a.yzing a.d sha.ing the infa.t’s ora. *** this review,we present evidence for the esta.lishment of the ora. microbiome during ea.ly childhood,the ca.a.ility of using childhood ora. microbiome to predict future ora. a.d systemic disea.es,a.d the limita.ions of the current evidence.

关键词： dia.nosis sa.iva.y biome

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

Some highlights of the Ga.ma.ra. first four yea.s of the Fermi Spa.e Telescope

引用

Frontiers of physics 2013年第6期8卷 693-713页

作者： steven Ritz Depa.tment of Physics a.d the SCIPP University of California Santa Cruz Santa Cruz CA 95064 USA

The Fermi Ga.ma.ra. Spa.e Telescope, formerly ca.led GLa.T, mea.ures the cosmic ga.ma.ra. flux in the energy ra.ge 8 keV to 〉 300 GeV. In a.dition to brea.through ca.a.ilities in energy covera.e a.d loca.iza.ion, the very la.ge field of view ena.les observa.ions of 20~ of the sky a. a.y insta.t, a.d the entire sky on a.timesca.e of a.few hours. With its la.nch in 2008, Fermi opens a.new a.d importa.t window on a.wide va.iety of phenomena. including pulsa.s, bla.k holes a.d a.tive ga.a.tic nuclei, ga.ma.ra. bursts, supernova.remna.ts a.d the origins of cosmic ra.s, a.d sea.ches for hypothetica. new phenomena.such a. pa.ticle da.k ma.ter a.nihila.ions. a.brief overview a.d selected science highlights from the first four yea.s a.e provided.

关键词： high-energy ga.ma.ra. a.trophysics da.k ma.ter funda.enta. physics tests spa.eba.ed a.trophysics spa.e-ba.ed pa.ticle a.trophysics ga.ma.ra. bursts bla.a.s pulsa.s

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

Wha. rea.ly ha.pens in strongly correla.ed superconductors:insights from a.qua.tum Monte-Ca.lo study of high tempera.ure superconductivity in FeSe films

引用

Science Bulletin 2016年第12期61卷 911-913页

作者： steven a.Kivelson Depa.tment of Physics Stanford University

BCS theory a.d its extensions form the ba.is of a.compelling a.d elega.t understa.ding of the properties of conventiona. ***,it is a.wea.-coupling theory,orga.ized a.ound the infinitesima.‘‘Cooper’’insta.ility of the Fermi *** is not merely a.theoretica. a.stra.tion:Schrieffer(a.ong others)ha. empha.ized tha. it is only beca.se the norma. sta.e a.ove T_c is

关键词：高温超导电性蒙特卡罗方法超导体强关联薄膜量子 BCS理论扩展形式

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：