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简介：<正>1IntroductionSaltLake,asakindofchemicalresources,hasbeenattractedtomanyresearchers,especiallytheresourcesoflithium.Asreported,manykindsofbrinesexistintheworlddependingonthecompositionsofthebrine.Basedonthechemicalcompositionthebrinescanbeclassifiedasthetypesofchloride,carbonate,sulfate.Fordifferent

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简介：ThepaperdiscussesthedistributionofQuaternarysediments,occurrenceofsalinemineralsandphasesofneotectonicmovementsandtheirmanifestationsintheQaidambasin.TheformationoffoursuccessivelacustrineterracesinTertiaryanticlinalzonesinthewesternpartofthebasinwasrelatedtotheneotectonicmovementsthattookplace100Kaago,andthedistributionofsuchterracesdiscloses,inaway.theevolutionaryhistoryoftheQuaternarysaltlakes.AccordingtothedistributionoftheterracescoupledwiththedistributionofQuaternarysedimentsandfeaturesofsaltdeposition,fourperiodsofQuaternarysaltlakeevolutioninthebasinmaybedistinguished,whichcorrespondtofourstagesofsaltdepositionrespectively.

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简介：<正>ThebrineshrimpArtemiaisoftenabundantlyfoundinhypersalineenvironments.Thelarvae(‘nauplii’)hatchingfromitsdormantembryos(‘cysts’)areacruciallivefooditemforthelarvalstagesoffishandshrimpinaquaculture

简介：Asequentialextractionmethodforthefractionationofphosphorus(P)inlakesedimentswasusedtoanalyzephosphorusfractionsofsedimentstakenfromthreelarge,shallow,eutrophicfreshwaterlakesofChina-TaihuLake,ChaohuLake,andLongganLake.AllthreelakesarelocatedinthelowerreachesoftheChangjiangRiver(YangtzeRiver).InTaihuLakeandChaohuLake,algaebloomsoccurredeveryyear,whileLongganLakewasamacrophyte-dominatedlake.Resultsshowedthatexchangeablephosphorusfractionsweremuchhigherintheeutrophiclakesedimentsthaninthemacrophyte-flourishinglakesediment.Also,theratioofFe:Pinthesedimentsofthealgae-predominantlakeswasgenerallymuchlowerthanthatinthemacrophyte-predominantlakes.Thus,thegeochemicalfractionsofphosphorusinsedimentshadacloserrelationshipwiththetypeofaquaticvegetation.

简介：TheNineplateaulakesarethoselakeswhoseareasarelargerthan30km2inYunnanprovince.TheselakesareDianchiLake,ErhaiLake,FuxianLake,ChenghaiLake,LuguLake,QiluLake,XingyunLake,YangzonghaiLake,andYilongLake.Thenineplateaulakesareimportantforeconomicdevelopmentandforecologicalsecurity.However,alllakesarefacingdifferentenvironmentalissuessuchaseutrophicationandwaterqualitydegradation.Differentstrategiesshouldbeproposedaccordingtothevariousconditionsofthelakes.Threetypesofprevention,controlandtreatmentstrategieswereproposedbasedonthesuccessionprocess,theecologystages,theeconomicandsocialdevelopment,theeutrophicationstages,thewaterqualities,andthedominantecologicalfunctions.

简介：LakesinTibetPlateauwithlittleeffectsofhumanactivitiesserveasimportantindicatorsofclimatechange.ThisstudyanalysedremotesensingdataandlongtermclimatevariablestoexaminethehydrologicalresponseoflakesinNamCoBasin.TheareachangesoflakeswereextractedbyLandsatTM/ETM+andanalysedbySRTM3DEM.AndtheICESatelevationdatabetween2003and2009wereusedtoobservethelakeleveloftheNamCoLake.Theresultsshowthatthenumberofnewformedglacierlakesincreasedby36%andtheareaofglacierlakesincreasedby36.7%(0.97km~2)from1991to2011.Atthesametime,thesurfaceareaoftheNamCoLakeexpandedby3.71%(72.64km~2)oftheoriginalsizein1991,withatendencyvalueof3.63km~2peryear.ThelakeleveloftheNamCoLakeshowsanincreasetendencyof0.24mperyearduring2003–2009.Thesevariationsappeartoberelatedtoanincreaseinmeanannualtemperatureof0.06oCperyear,andanincreaseinannualprecipitationof2.1mmperyearinsummerinthelasttwodecades.Theincreasednumberoflakesandincreasedareaofglaciallakesreachedapeakatanaltitudeof5500–5600ma.s.l..Thenumberofnewformedglacierlakesandtheareaofglacierlakestendtohigheraltitudes.ClimatechangehasanimportantimpactonthevariationoftheglacierlakesandtheNamCoLake.

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简介：<正>1IntroductionLithiumanditscompoundsasajointofrisingindustriesnewenergysources,newmaterials,andinformationtechniquehavebecomemoreandmoreimportantrecentyears.Especiallylithiumionbatterieswithbiggerorsmaller

简介：<正>BrackishandsalinelakesarecommoninthearidzonesoftheEarth.TheyareuniqueecosystemswithextremelyhighpHvaluesandhighmineralizationlevels(uptosaturatingconcentrations).Theselakesareinhabitedby

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简介：<正>Salinityisanimportantfactorcontrollingthemicrobialdistributioninlakes.Howeverlittleisknownabouthowmicrobialcommunitiesevolveinresponsetosalinityvariation.Inthisstudy,weinvestigatedthemicrobial

简介：KelanaJayaMunicipalParkisapopularrecreationparkinPetalingJaya.Thefivelakes,locatedwithinthePark,wereex-miningponds,functioningasfloodretentionpondsandreceivingeffluentsfromnearbyhumanactivitiesmainlyfromresidentsandtransportation.Astudywasconductedtodeterminethedistributionandsourcesofheavymetals(Cd,CuandZn)inthesedimentsofKelanaJayaLakes.ConcentrationsofCd,Cu,andZnforsurfacesedimentweredeterminedbyusingaqua-regiamethodandsequentialextractiontechnique.TotalCdconcentrationsrangedfrom0.48μg/gto2.68μg/gdryweight(dw)foralllakes.TotalCdconcentrationsinsedimentofalllakesexceededCCME(CanadianCouncilofMinistersoftheEnvironment,2001)guidelines.TotalCuconcentrationsrangedfrom7.37μg/gto73.6μg/g(dw).OnlyCuconcentrationinonelakeexceededtheCCMEguidelinesbesideshavingthehighestmeanconcentrationamongall.TotalZnconcentrationsrangedfrom107μg/gto529μg/g(dw).Again,TheZnconcentrationsinthreelakeswerefoundtoexceedCCMEguidelinesforZnconcentrationinfreshwatersediment.GeochemicalstudyonsedimentrevealedthatnonresistantfractionsforCd,CuandZnforotherlakesthereCuandZnindicatedthatlakesinthepark,especiallynearoxidationpondandmonsoondrains,couldhavereceivedanthropogenicmetalsfromdomesticwastes.RehabilitationprogramandregularbiomonitoringatKelanaJayaLakesarethereforerecommended.

简介：2004年全年GreatLakes化学公司持续运作净销售额是16．037亿美元，与2003年的14．259亿美元相比，提高了12％。在清算帐目零头之前，2004年持续运作收入达到1990万美元，而2003年亏损4010万美元。包括停业部门损益和累计结果调整，据GreatLakes报道2004年净收入为6290万美元，而2003年则是净亏损5140万美元。在财务结果即将公布之前，公司宣布修改它的财务报告章节。这些章节被重新命名以便更清晰反应关键终端市场和服务客户。

简介：Chemtura公司的GreatLakesSolutions在位于美国尔多拉多的制造厂启动生产商业化产品EmeraldTM1000。该新型聚合物阻燃剂是该公司绿色创新战略的一项产品。并且是Emerald系列产品中具有高性能．绿色安全的四种阻燃剂之一。

简介：TheLudaoLakewithanareaof0.86km2and50%watersurfaceratio,wastakenasanexampletostudytheeco-hydraulicstechniquesforpreventinglakeeutrophication.Besidesexternalwaterinflowandoutflow,thetermrelatedtointernallocalflowcirculationwasaddedinthecontinuityequationoftwo-dimensionalhorizontalhydrodynamicmodel,andfurtherthehydrodynamicmodelwascalibratedbythescenarioofnowaterexchange.Thevelocityof0.2m/swassuggestedtobethecriticalvelocityofcontrollingalgalbloom.Toachievethecriticalvelocityinthewholelake,threefactorswereanalyzed,whicharewind,artificialexternalinflowaugmentationandinternallocalflowdisturbancebypumpcirculation.Itisfoundthattheroleofwindcanbedisregarded.Fortheeco-hydraulicstechniqueofexternallakewaterinflowaugmentation,thewaterflowingrouteshouldbefirstlyoptimized,further,thelakeinflowhasacriticalvalueunderspecifiedwaterlevelduetothenarrowinlets,sothewholelakeisdifficulttoreachthecriticalvelocitytopreventalgalbloom,andacombinationofexternalinflowaugmentationandinternallocalflowingdisturbanceshouldbeconsidered.Simulationresultsshowthatthecombinationofexternalwaterinflowaugmentationandinternallocalflowdisturbancerequireslesseco-flowtoachievetheglobalcriticalvelocitythanthesoleinternallocalflowdisturbance,fortheLudaoLake,theformerrequirestotaleco-flowof25m3/s,whichreducesby50%thanthelatterrequiringtotaleco-flowof52m3/s.