简介：Telluriumisasortofscatteredrareelementontheearth.Itsconcentrationisverylowinearth'scrust,only1.0ng/g.However,ithasextremelyhighabundanceinCo-richcrusts,marinepolymetallicnodules,deep-seasedimentsandaerolites.Tofindouttheoriginoftelluriumenrichmentindeep-seasediments,weanalyzedandcomparedtelluriumconcentrationsandheliumisotopecompositionsinthemagneticpartsandthoseinthebulkpartsofdeep-seasediments.Theresultindicatesthattheheliumcontent,3He/4Heratioandtelluriumconcentrationareobviouslyhigherinthemagneticpartsthanthoseinthebulkparts.The3Heabundancevariessynchronouslywiththetelluriumconcentration.3HeandTehaveadistinctpositivecorrelationwitheachother.Itisthefirsttimethatthepaperbringsforwardthattheextremeenrichmentoftelluriumindeep-seasediments,likeheliumisotopeanomalies,probablyresultsfromtheinputofinterplanetarydustparticles(IDPs).Similarly,theextremeenrichmentoftelluriuminmarinepolymetallicnodulesandCo-richcrustsispossiblyrelatedtoIDPs.

简介：Goldenrichmentmechanismofore-formingfluidistheessenceofgoldmetallization.Thispapersummarizesthedistinguishingsymbolsofmantlefluidandeffectofcrust-mantlestructureonfluidmovement.Fluidmovingprocessesincludeosmosis,surge,gas-liquidalterna-tionandmutationoffluidspeed.Duringfluidmovement,goldwillbeenrichedgradually.Final-ly,alayeredcirculatorysystemisillustratedinthispaper.

简介：ThedifferentialenrichmentofgoldandarsenicobservedinAs-bearinghydrothermalgolddepositsinSouthwestGizhouisinducedbyvapor-liquidseparationinresponsetochangingphysico-chemicalconditionsduringthehydrothermalevolutionandisareflectionofthegeochemicalbehaviorofthetwoelements.

简介：TherearetwomaintypesofirondepositsintheMiddle-LowerYangtzeValleydistrict.Bothofthemunderwentpost-magmatichydrothermalprocessesduringoreformation.Ironinthehydrothermalorebodieswasderivedlargelythroughmobilizationfromsubstantiallyconsolidateddiroiticintrusives.Wall-rochalterationzonationindicatesthatiron-mobilizinghydrothermalfluidsevolvedinatrendofdecreasingalkalinity,whichissuggestedbyregularlydistributedwall-rockalterationsformedbyiron-mobilizinghydrothermalfluidsandisincontradictionwiththecurrentchloride,chloridecomplexandbicarbonatemodelsforironmobilization.ThecloseassociationofcarbonatizationwithironoresandthehighconcentrationsofreducedgasessuchasCO,CH4andH2influidinclusionssuggestthatironismostprobablytransportedintheformofironcarbonylsduringpost-magmatichydrothermalprocesses.Inthelightoftheironcarbonylmobilizationmodel,explanationsaremadeoftheconstraintsonoresofsomegeologicfactorssuchasmelanocraticalteration,carbonatization,carbonatestrata,structuralfractures,cyptoexplosivepipesandembryoores.

简介：Thebulkcompositionoforganicmatterandsaturatedandaromatichydrocarbonsex-tractedfrom16samplescollectedfromtwoKupferschieferprofilesintheRudnamine,SouthwestPolandhasbeenanalyzedtostudytheroleoforganicmatterduringbasemetalenrichmentintheKupferschiefershale.Theresultsindicatedthattheextractyieldsandsaturatedhydrocarbonyieldsdecreasedwithincreasingbasemetalcontents.GCandGC/MSanalysesindicatedthatn-alkanesandalkylatedaromaticcompoundsweredepletedandmayhaveservedashydrogendonatorsforthermochemicalsulfatereduction.Theenrichmentofbasemetalsiscloselyconnect-edwiththedestructionofhydrocarbons.

简介：AfterthebreakthroughofshalegasexplorationanddevelopmentintheOrdovicianWufengFormation(Fm.)andSilurianLongmaxiFm.ofChongqingJiaoshibaarea,Changning-Weiyuanarea,etc.inSichuanbasin,aseriesofdiscoveryandbreakthroughwereobtainedbyChinaGeologicalSurveyintheCambrianNiutitangFm.andSinianDoushantuoFm.shaleoftheareaswithcomplicatedstructureoutsideSichuanbasin.BasedontheunderstandingofthelawofshalegasenrichmentinLongmaxiFm.inthebasin,thispaperputsforwardthreeelementsoftheformationandenrichmentofshalegas,whicharethe“Source”,the“Diagenesis”andthe“Accumulation”,afterdeeplystudyingthelawshalegasenrichmentandaccumulationinSinian-Cambrianreservoirofthecomplexstructureareaoutsidethebasin.The“Source”meansthesedimentaryenvironmentandpetrologicalcharacteristicsoforganicshale.The“Diagenesis”meansthebasintectonicsubsidenceandhydrocarbongenerationandexpulsionprocessoforganicmatter.The“Accumulation”meansthetectonicupliftandshalegaspreservation.ItisproposedthattheSinian-CambrianandOrdovician-SilurianblackshaleseriesinthemiddleandupperYangtzeregionofsouthernChinawerebothformedinthedeep-watershelfenvironmentofrifttroughandforelandbasinrespectively.Thedessertintervalswereformedinthestrongreductionenvironmentundertransgressivesystemtract.Theshalelithologybelongstocalcium-siliceousandcharcoal-siliceousrespectively.BasedonthesummaryofstructuralevolutioninYangtzearea,thecorrelationofstructuralburialdepthwithshalediagenesisandthecouplingevolutionoforganicmatterwithporestructurearediscussed.Combiningwithstructuralstyles,thepreservationconditionsofshalegasarediscussed.Fivetypesofshalegasreservoircontrolmodelsarefurtherdescribed.Twotypesoffutureexplorationdirections,whicharereversefaultsynclineandpaleo-upliftmarginincomplexstructuralareaoutsidethebasin

简介：基于井核心，薄节和FESEM的观察，把指示物，水库特征和S字4-Esx的页岩油丰富的控制因素与X光检查衍射，物理性质测试和geochemical相结合在Jiyang消沉的3页岩被详细说明分析。研究证明碳酸盐和泥土矿物质在页岩被统治。根据三角图表，TOC内容(2%和4%)，碳酸盐和泥土矿物质，九张岩相被识别了。水库空间类型富于页岩，在哪个，把压成薄片的破裂，再结晶intracrystalline毛孔和器官的毛孔是高质量的水库空格。页岩油丰富被生产烃的潜力和水库能力主要决定。烃--生产能力被器官的地球化学指示物，为学习区域的特别TOC内容，和器官富人的页岩的厚度控制。水库能力被岩相，TOC内容和结构的活动主要影响。另外，页岩采油被页岩的fracability影响，它被岩相主要控制，结构的活动，形成压力，等等。页岩油水库评估应该集中于TOC内容，器官富人的页岩的厚度，岩相和结构的因素。

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简介：高原一种短耳野兔(Ochotonacurzoniae)的一个充实microsatellite的图书馆根据与biotin和streptavidin的强壮的亲密关系被构造。第一，genomicDNA被ultrasonication碎裂，它是在传统的方法上的主要改进。绑扎连接器的DNA碎片是有biotinylatedmicrosatellite探针的hybridized，然后受到streptavidin涂的磁性的祷告。PCR扩大被执行获得包含microsatellites的双strandedDNA碎片。结扎和转变被使用pGEM-T向量系统执行我和EscherichiacoliDH10B能干的房间。定序结果证明80.2%克隆包含了microsatellite重复主题。几修正使这个协议比传统的时间有效、技术上容易；特别地，在高原一种短耳野兔染色体的作文和相对许多microsatellite重复真正通过优化PCR条件被代表。这个方法成功地也被使用了构造中国仓鼠(Cricetulusgriseus)的充实microsatellite的genomic图书馆，表明它的可行性和稳定性并且小鲍鱼[Haliotisdiversicolor(穿)]与积极克隆的高率。

简介：Inthispapertheseven-stepcontinuousextractingmethodwasemployedinthestudyofchemicalformsofthesixheavymetalsCo,Zn,Pb,Cu,CrandMn,Theresultshowsthattheetalsinthelateritearepresentinthechemicalformofcrystallineironoxidesandresidues,andtheyaretransformedtowaredorganicandexchangeableformsinthesurfacesoil.Linearregressionanalysisindicatesthattheaboveheavymetalshaveapositivecorrelationwiththecrystallineironoxideminerals.Thecrystallineironoxidemineralshaveaveryimportantroletoplayintheenrichmentofheavymetals,especiallythesolidcomponentsinthelaterite.

简介：ThisPaperreportsenrichmentandsepqrationoftracePd(Ⅱ）withsilicagelbondedby(benzolyazo-arsenazoI)-aminopropyl(BAAI·SG).BAAI·SGisstableinsolutionbetween6mol/LHClandpH9.0.ThemaximumadsorptivecapacitiesofBAAI·SGandSGare52.7,23.5μmol/grespectively.AfterpreconcentrationthroughBAII·SGcolumn,Pd(Ⅱ）ofppblevelinartificialwatersamplescanbemeasuredbyspectrophotometry.

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简介：InordertosuppressthesurfacecrackinginducedbyCuduringreheatingandhotrollingprocess,Cuenrichmentanditsmigrationatthesteel-scaleinterfacewasinvestigatedduringheatingofsteelcastattemperaturesbetween1000℃and1200℃inN2-O2andN7-H2Oatmospheres.ForoxidationofCucontainingsteel,CuenrichedphasewasformedbythepreferentialoxidationofFeandtheenrichmentandmigrationbehaviorofCudependsontheoxidationtemperature,steelchemistryandatmospherecondition.NiinsteelinducedtheformationofsolidCuandNienrichedphaseatsteel/scaleinterfaceandinscalelayerandtheformationofunevensteel/scaleinterface,whichsuppressestheCuenrichmentbecauseofextrusionofCuenrichedregionbeforetheformationofliquidphase.Ontheotherhand,SnadditionpromotestheliquidCuformationatsteel/scaleinterfaceandpenetrationintograinboundaryofCuenrichedphasebydecreasingsolidustemperatureandsolubilitylimit.Inaddition,foroxidationat1200℃,thebehaviorofCuatandaroundthesteel-scaleinterfacewasfounddependenttoalargeextentonmorphologyoftheoxidescaleformedduringoxidation.Attheearlystageofoxidation,Cu-richphaseformedandaccumulatedatthesteelscaleinterfaceunderbothO2-N2andH2O-N2atmospheres.Astheoxidationproceeded,however,Cuenrichmentatanditsmigrationfromthesteel-scaleinterfacewerevastlydifferentfordifferentoxidizingatmospheres.InthecaseofO2-N2oxidation,anoxidelayerformedinitiallyatthesteelsurface,butsoonafteragapwasdevelopedatthesteel-scaleinterfaceandgrewinitssize,whichpracticallyseparatedthescalefromthesteelsubstrate.Thescalelayerformedunderthisconditionwasporous.TheCu-richphaseinitiallyformedattheinterfacewasfoundmigratingtothescalelayer,leavingnoCu-richphaseattheinterface.InthecaseofH2O-N2oxidation,however,thescalelayerformedwasdenseandtightlyattachedtothesteelsurface,andtheCurich-phasecontinuedto

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简介：Previousstudieshavedemonstratedthatdoublecortin-positiveimmatureneuronsexistpredominantlyinthesuperficiallayerofthecerebralcortexofadultmammalssuchasguineapigs,andtheseneuronsexhibitveryweakpropertiesofself-proliferationduringadulthoodunderphysiologicalconditions.Toverifywhetherenvironmentalenrichmenthasanimpactontheproliferationandmaturationoftheseimmatureneuronsintheprefrontalcortexofadultguineapigs,healthyadultguineapigsweresubjectedtoshort-termenvironmentalenrichment.Animalswereallowedtoplaywithvariouscognitiveandphysicalstimulatingobjectsoveraperiodof2weeks,twiceperday,for60minuteseach.Immunofluorescencestainingresultsindicatedthatthenumberofdoublecortin-positivecellsinlayerIIoftheprefrontalcortexwassignificantlyincreasedaftershort-termenvironmentalenrichmentexposure.Inaddition,thesedoublecortin-positivecellsco-expressed5-bromo-2-deoxyuridine(amarkerofcellproliferation),c-Fos(amarkerofcellviability)andNeuN(amarkerofmatureneurons).Experimentalfindingsshowedthatshort-termenvironmentalenrichmentcaninduceproliferation,activationandmaturationofdoublecortin-positivecellsinlayerIIoftheprefrontalcortexofadultguineapigs.

简介：Anopen-topchamberexperimentwasconductedattheUniversityofMichiganBiologicalStationnearPellston,Michigan,USA,tostudytheeffectsofsoilfertilityandCO2onleaf,stemandrootdarkrespiration(Rd)ofPopulustremuloides.Overall,area-baseddaytimeleafRd(Rda)wassignificantlygreateratelevatedthanatambientCO2inhigh-fertilitysoil,butnotinlow-fertilitysoil.Mass-basedleafRd(Rdm)wasoverallgreaterforhigh-thanforlow-fertilitysoilgrowntreesatelevated,butnotatambientCO2.NighttimeleafRdaandRdmwereunaffectedbysoilfertilityorCO2,norwasstemRda,whichrangedfrom1.0to1.4μmolm-2s-1inthespringand3.5to4.5μmolm-2s-1inthesummer.RootRdawassignificantlyhigherinhigh-thaninlow-fertilitysoil,butwasunaffectedbyCO2.SincebiomassproductionofP.tremuloideswillbesignificantlygreateratelevatedCO2whilespecificRdwilleitherincreaseorremainunchanged,wepredictthatcarbonlosstotheatmospherethroughrespirationfromthisecologicallyimportantspecieswouldincreaseathigherCO2.SoilfertilitywouldalsointeractwithelevatedCO2inaffectingthecarbonflowintheplant-soil-airsystem.

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