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【英文标准名称】:Waterquality-Biologicalmethods-Selectionoftestsforbiodegradability
【原文标准名称】:水质.第5部分:生物法.第0节:生物降解性试验项目选择
【标准号】:BS6068-5.0-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-04-15
【实施或试行日期】:1998-04-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:污水;毒性;水;生物降解能力;细菌纲;生物分析和试验;水质试验;水污染;试验条件;质量;选择
【英文主题词】:Activatedsludges;Biodegradability;Definitions;Methodtesting;Organiccompounds;Waterquality;Watertesting
【摘要】:Thebiodegradabilityofsubstancesandwastewateringredientsdependsnotonlyonthemolecularstructuresofthetestmaterial,butalsoonimportantadditionalfactorssuchasthe-aquaticorterrestrialtestenvironment;-aerobicoranaerobictestconditions;-sourceandconcentrationofthemicroorganismsoftheinoculum;-acclimatisationandadaptationoftheinoculum;-concentrationofthetestmaterial;-availabilityofinorganicnutrientsandadditionalorganicmaterialforco-metabolicprocesses;-possibletoxiceffectsofthetestmaterialunderthetestconditions;-physicalandchemicalpropertiesandbioavailabilityofthetestmaterial(e.g.volatility,watersolubility,adsorption);-conditionsand:physicalandchemicalpropertiesofthetestsystem(volumeoftestvessels,static,dynamic,closed,CO2removal,temperature,mixing,shaking,oxygensupply);-testduration;-analyticalparametersused(summaryparameterssuchasDOC,BOD,CO2orsubstancespecificanalysis).Assomanyfactorscaninfluencethetestresultsitisnotpossibletodefinea"true"or"reference"method.Thereproducibilityofthetestresultsusingdifferentmethodsorconditionsorevenusingidenticaltestmethodscanbelowanddifferingtestresultscanbeobtained.Normallyatestmaterialwhichiseithereasilybiodegradableorpoorlybiodegradablewillproducesimilartestresults.So-called"grey"substances,whicharemoderatelybiodegradableandneed,forexample,specialbacteriaorlongadaptationperiods,willoftenproducedisparateresults.Biodegradabilitytestsareusedtoestablishthebiodegradabilityofchemicalstructuresandtopredictthebiodegradationbehaviourofatestmaterialinanaturalortechnicalenvironment.Theaimofeachtestmethodshouldbetosimulate,toacertaindegree,suchanenvironment.Therefore,assomanyfactorscaninfluenceorevenexcludecertainmethods,itisnecessarytohaveasufficientnumberofdifferentstandardizedtestmethodstoallowthechoiceofthebestoneforthespecificpurpose.ItisalsotoberememberedthatitwasISO'sintentiontostandardizethebiodegradationtestsoftheOECDGuidelinesforTestingofChemicals(seeannexB).
【中国标准分类号】:Z16
【国际标准分类号】:13_060_70
【页数】:16P.;A4
【正文语种】:英语


【英文标准名称】:Timberstructures-Structuraltimberandgluedlaminatedtimber-Determinationofsomephysicalandmechanicalproperties;GermanversionEN408:2010
【原文标准名称】:木材结构.结构木材和胶合板.某些物理和机械特性的测定;德文版本EN408-2010
【标准号】:EN408-2010
【标准状态】:现行
【国别】:
【发布日期】:2010-12
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Bendingstrength;Boardcordwood;Bulkdensity;Components;Compressivestrength;Construction;Constructionmaterials;Determination;Dimensions;Laboratorytesting;Materials;Mechanicalproperties;Mechanicalpropertiesofmaterials;Modulusofelasticity;Moisture;Physicalproperties;Properties;Sawntimber;Shearmodul;Shearstrength;Solidwood;Symbols;Tensilestrength;Testing;Timberconstruction;Timberstructures;Wood;Woodbasedsheetmaterials
【摘要】:
【中国标准分类号】:P23
【国际标准分类号】:79_040;79_060_99;91_080_20
【页数】:38P;A4
【正文语种】:英语