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1.
Effect of sodium arsenite on adrenocortical activity in immature female rats: evidence of dose dependent response 总被引:1,自引:0,他引:1
ntroductionArsenic,ametalloid,isanonessentialtraceelement,hasbeenclaimedtobeofclinicalbenefitinthetreatmentofsyphilis,amoebiasisandothertropicaldiseases(Klaassen,1990;Kowaguchi,1981).Besideitsclinicalimportance,arsenicisreportedtobeanimportantwaterpo… 相似文献
2.
Random walk modeling of wake dispersion for the exhaust tower of an underground tunnel in urban area 总被引:1,自引:0,他引:1
IntroductionRecently,someinstallationswithspecialconstructionforextractingcontaminantgas,suchasanexhausttoweroftheundergroundtunnel,etc.weresetupinurbanandindustrialcomplexareas.Theeffectsoftheseconstructionsontheflowandtherebyonthelocaldispersionoft… 相似文献
3.
IntroductionThesolid/fluidtwophaseflowsareoftenencounteredinmanyenvironmental,chemicalandhydraulicengineering,suchassedimenttransportationinrivers,wastewaterflowwithsolidparticlesandsoon.Recently,considerableeffortsregardingnumericalpredictionshaveb… 相似文献
4.
Transfer of Australian environmental research on the insecticide endosulfan to Anhui Province, China
Turlough F. Guerin 《环境科学学报(英文版)》1999,11(4):443-448
IntroductionTechnologytransfer,orextension(atthelocallevel),istheprocessofmovinginnovationsfromtheirorigintotheirpointofoperation.Innovationsmayincludescientificandtechnicalknowledge,ideas,services,inventionsandproducts.Technologyadoptionistheimpleme… 相似文献
5.
Recovery of heavy metals from electroplating sludge and stainless steel pickle waste liquid by ammonia leaching method 总被引:2,自引:0,他引:2
1 IntroductionElectroplatingsludge,containingCu,Ni,Zn,Cr,Fe,etc.,isharmfulwastematerialproducedbygalvanizationindustry.Thereisstillnoeffectivemethodtorecoverresourceandcontrolpollutionbothathomeandabroad.Themetalsdiscardedbygalvanizationindustryamoun… 相似文献
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1 IntroductionOnaninternationalscale,thenatureofurbanairpollutionhaschangedsignificantlyoverthelast50years.Inthe1950sand1960s,themostimportantenvironmentalhealthissuesstemmedfromtheoccurrenceofurbansmogs,anatmosphericcocktailcharacterizedbyhighconcen… 相似文献
7.
Integrated environmental assessment: an urban perspective 总被引:2,自引:0,他引:2
John Murlis 《环境科学学报(英文版)》1999,11(3):264-271
1 IntroductionUrbanareasthroughouttheworldareincreasinglyafocusofenvironmentalconcern.Theyareplacesofintenseandgrowingeconomicactivity.Inresponse,urbanpopulationsaregrowingrapidly.Itisestimatedthat,by2000,morethanhalftheworld○spopulationwillliveintow… 相似文献
8.
Whenchromiteisrefinedtoproducesilicoferrochromealloy,akindofslagcontainingchromiumisformed,knownasferrochromeslag.Itconsistsofmainlycalciumoxide,siliconbioxideandafewbichromiumtrioxide.Becauseofit○slargeproductionandalsobecauseitcontainsharmfulCr6+w… 相似文献
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1 IncreasingenvironmentalproblemscallfortechnologicalsolutionsWiththerapideconomicgrowthinthepasttwodecades,allthemajorenvironmentalproblemsofworldwideconcernhaveappearedinChinainonewayoranother.Theyaremainlyreflectedinsoilerosion,desertification,bi… 相似文献
10.
IntroductionInrecentyears,moreandmoreevidencesshowthatgreenhousegasesemissionshavebeguntoinfluenceglobalclimate.Greenhouseeffectisoneofthemostrigorouschallengesnowadaysweface.Sincebothcauseandimpactofclimatechangeareglobal,thewholeworldshouldtakeacti… 相似文献
11.
1IntroductionLandscapeecologyfocusesonstructure,function,andchangesinlandscape(Forman,1986).Heterogeneityinlandscapesisshaped... 相似文献
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IntroductionInmosthigherplantsthesynthesisandaccumulationofbetaineunderstresscondition(saltordrought)hasimportantphysiologicalsignificance(Greenway,1980;Hanson,1978;Storey,1977;Wyn,1977;1978;Hatz,1980).Thereweremanystudiesonthechangeinbetainelevelsin… 相似文献
13.
Mark McCarthy 《环境科学学报(英文版)》1999,11(3):279-283
1 Sustainableurbandevelopment—thepublichealthdimensionTownsandcitiesarecurrentlythefocusforeconomicplanninganddevelopmentinEuropeancountries.Formerly,politiciansandplannersprioritizedinternationalandnationallevels,withmacroeconomicdevelopmentseenast… 相似文献
14.
Wang Jinfeng 《环境科学学报(英文版)》1999,11(3):339-343
1 IntroductionUrbansustainabledevelopment,populationandGDPproduction,traffic,andenvironmentareinteractingwitheachother.Productionofpopulationandgoodsraisetheneedforexchangeinspace,leadingtotrafficflow.Thetrafficflow,inreverse,furtherenhancetheproduct… 相似文献
15.
objectiveofcouplingshouldbedecidedbecausethefactorsofwaterandlandresourceshavevariedefectsondiferentpurposes,forexample,tobui... 相似文献
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1 Introduction1-1 DiatomsDiatoms(ClassBacillariophyceae)arecommonandwidelydistributedinbothfreshandmarinewaters(Moser,1996).ThesemicroscopicunicellularplantsfixamajorportionoftheEarth○scarbon,generateoxygen,andsupplyfoodtoanimalswhichfeedonthem(Dixit… 相似文献
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1IntroductionAerosolsplayanimportantroleinclimatechange,airquality,aciddeposition,visibilityreduction,andcloudproceses.Theyar... 相似文献
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IntroductionIncreasedagriculturalproductivityoverthepast50—100yearshasledtoincreasedatmosphericconcentrationsofCO2,CH4andN2O.Thesegases,alongwithadditiontracegasspecies(greenhousegases)arecausinganincreaseinglobaltemperaturesandozonedepletion(Aselman… 相似文献
19.
IntroductionIodineisanessentialtraceelementcomposingthyroxinthatisofgreatimportanceforthegrowthofhumanbody.Ithasbeenknownthatthedeficiencyofiodineisamajorcauseforanimpedimentofbrainpower.Duringthefetusandbabygrowing,ifsuppliedadeficientiodine,theywil… 相似文献
20.
Treatment of bleaching wastewater from pulp paper plants in China using enzymes and coagulants 总被引:1,自引:0,他引:1
ZHANG Tong Shinji Wa Takao Yamagishi Ichikawa Hiroyasu Kenji Tatsumi ZHAO Qingxiang 《环境科学学报(英文版)》1999,11(4):480-484
IntroductionBleachingwastewaterfrompulppaperplantscontainsmanykindsofchlorinatedorganiccompoundswhichareprovedtobecarcinogenic,mutagenicandrefractory(Gellman,1988;Paasivirta,1988;Garden,1990;Suntio,1988;Vuorinen,1987;Seppala,1988).Severalmethods,inc… 相似文献