共查询到20条相似文献,搜索用时 15 毫秒
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IntroductionPolyaluminiumchloride(PAC) ,akindofinorganicpolymerflocculant,iswidelyusedinwaterandwastewatertreatment.InordertoincreasethecoagulationeffectofPACandimprovethequalityofPACproduct,itisnecessarytoraisethedegreeofpolymerizationofPAC .Generally ,t… 相似文献
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Amethodforcalculatingthetotalozoneamountintheclearskies¥BaiJianhui;WangGengchen(InstituteofAtmosphericPhysics,ChineseAcademyo... 相似文献
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IntroductionA .tatarinowiiScott,aperennialimmergedherbinwetlands ,belongstoAraceae ,Acorus.ItsflorescencewasfromApriltoJulyanditsrhizomewasfragrant.ItisdistributedovertheSouthpartofChina ,EastIndian ,VietnamandNorthThailand .Itwascommoninwetlands ,brooksorth… 相似文献
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Introductionα naphthaleneaceticacid (NAA)isanimportantplantgrowthregulatorusednotonlytopreventthepreharvestdropofapplesbutalsoasafruitthinningagent (Worthing ,1991) .MuchresearchworkabouttheeffectofNAAonplanttissues(Speer,1993;Hideyoshi,1993;Prasd ,1994 ) ,plantgrowtha… 相似文献
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《环境科学学报(英文版)》2003,(3)
ResearchCenterforEco EnvironmentalSciences,ChineseAcademyofSciences (RCEES CAS ) ,formerlyInstituteofEnvironmentalChemistry ,ChineseAcademyofSciences ,wasfoundedin 1975 .In 1986,itwasamalgamatedwithResearchCenterofEcology ,CAS ,andwasrenamedasResearchCenterforEco E… 相似文献
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加利福尼亚谷地与大烟雾CaliforniavtheBigSmog¥Abstract:California,particularlyLosAugeles,encapsulatesAmerica'ssuccessesandfailures:thecari... 相似文献
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《安全.健康和环境》2003,(4)
UnitedNationshavementionedthatover30Euro pean,CentralAsianandNorthAmericancountrieshaveagreedapactextendingthepublic'srighttoknowaboutchemicalwasteandtoxicpollutantsintheirareas.Afterovertwoyearsofnegotiationsthedraftagree mentwillcoverthedisposal,sto… 相似文献
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《环境科学学报(英文版)》2003,15(3):355-355
ResearchFields :AquaticEnvironmentalQualityItistodevelopadvancedsciencesofwaterqualityprocessandhightechnology ,studythemechanismsofwaterqualityprocessofnaturalwatersandwatertreatment.Aswellastodevelophightechnologyandtechniquesforwatertreatment,soastop… 相似文献
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1 IntroductionPolycyclicaromatichydrocarbons(PAHs)containtwoormorearomaticringswhichfusedtogetherindifferentpossiblearrangements ,thusnumerousPAHs,theirisomers,andtheirderivativesaretheoreticallypossible.Becausemanyofthemandtheiranalogsarestronglypotentc… 相似文献
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Pan Jiahua 《环境科学学报(英文版)》1994,6(4):402-411
AcomparativeassessmentofalternativeapproachestosustainabledevelopmentPanJiahuaInstituteofWorldEconomicsandPolitics,ChineseAca... 相似文献
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TheU .S .EnvironmentalProtectionAgencyrequestedtheNationalResearchCouncil(whichistheoperatingarmoftheU .S .NationalAcademyofSciencesandtheU .S .NationalAcademyofEngineering)tocarryoutacriticalscientificevaluationofindicatorstomonitorecologicalchangesfromeit… 相似文献
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IntroductionThispaperconcernstheadaptationandapplicationofamesoscalemeteorologicalmodelforgeneratingthewindfieldsandothermeteorologicalparametersforfuturestudiesofairpollutioninthecomplexterrainofHongKongSpecialAdministrativeRegion (HKSAR) .Themainarea… 相似文献
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保护全球共同的财富──大气TheAtmosphere:GlobalCommonstoProtect¥G.O.P.OBASIAbstract:Inthisarticle,theauthordescribestherisksfromclimatecham... 相似文献
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《环境科学学报(英文版)》2000,(Z1)
IntroductionAgreatamountofpeer reviewedinformationisnowavailableaboutmercury (Hg)cycling ,muchofwhichwasfirstpresentedinaseriesofinternationalconferencesonHgasaglobalpollutantheldinGavleSweden (Lindqvist,1991a) ,MontereyCAUSA (Watras,1994) ,WhistlerBCCanada (Porce… 相似文献
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CharacteristicsofdistributionofheavymetalsinsedimentofLeAnRiverLiQi(ResearchCenterforEco-EnvironmentalSciences,ChineseAcademy... 相似文献
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Ecologicalengineeringlandtreatmentsystems──AnewdevelopmentinChina¥GongPing;SunTieheng(InstituteofAppliedEcology,ChineseAcadem... 相似文献
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《安全.健康和环境》2003,(2)
CSB,NTSBConcludeAgreementonAgencyCooperationFulfillingarequirementofSection112(r)oftheCleanAirActAmendments,theNationalTransportationSafetyBoard(NTSB)andtheU.S.ChemicalSafetyBoard(CSB)agreedtoestablishformalcooperativetiesbetweenthetwoagenciesatWashi… 相似文献