EN 21942-1-1991 牙科术语.第1部分:通用及临床术语(ISO1942-1:1989)
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【英文标准名称】:Dentalvocabulary;part1:generalandclinicalterms(ISO1942-1:1989);germanversionEN21942-1:1991
【原文标准名称】:牙科术语.第1部分:通用及临床术语(ISO1942-1:1989)
【标准号】:EN21942-1-1991
【标准状态】:现行
【国别】:
【发布日期】:1991-10
【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】:术语;定义;临床的;牙科的;牙科学
【英文主题词】:Clinical;Definition;Definitions;Dental;Dentalequipment;Dentalmaterials;Dentistry;Terminology;Vocabulary
【摘要】:
【中国标准分类号】:C05
【国际标准分类号】:01_040_11;11_060_01
【页数】:8P.;A4
【正文语种】:英语
【英文标准名称】:Pressureresistantcircularglass-to-metalfusedsightglasses-Part1:Forholderswithrecess
【原文标准名称】:抗压力的圆形玻璃－金属熔融观察镜.第1部分:用于带槽面夹持装置
【标准号】:DIN7079-1-1999
【标准状态】:现行
【国别】:德国
【发布日期】:1999-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:气压;玻璃片;化工设备;公差(测量);包装件;作标记;仪器工程;形状变化;极限偏差;抗压应力;视孔玻璃;设计;材料;眼镜;尺寸;工作过载压力;硼硅酸盐玻璃;圆形
【英文主题词】:
【摘要】:Thedocumentisapplicabletocircularglass-to-metalfusedsightwiththesightglassfusedintoasteelringwhichcanbesubjectedtoliquidorgaspressureononesidewithinatemperaturerangeof-10?upto300?inflangedholdersinaccordancewithDIN28120orinstraightpatternvalveswithcircularsightglassesinaccordancewithDIN3237-1.
【中国标准分类号】:Q37
【国际标准分类号】:71_120_10
【页数】:9P;A4
【正文语种】:德语
【英文标准名称】:StandardPracticeforDeterminationofHydrolysisRateConstantsofOrganicChemicalsinAqueousSolutions
【原文标准名称】:水溶液中有机化合物的水解率常数测定的标准作法
【标准号】:ASTME895-1989(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1989
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E47.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:Aqueousenvironments;Degradation--environmentalmaterials/applications;Environmentalorganiccompounds;Firstorderreactionkinetics;Half-life(organicchemicals);Hydrolysis;Organiccompounds--water;Organicmattercontent;Rateofhydrolysis;Water
【摘要】:Hydrolysisisoneofseveralfactorswhichmayinfluencethedegradationoforganicchemicalsintheenvironment.Hydrolysismaybethedominantpathwayforthetransformationofmanychemicals.Hydrolysiskineticsare,therefore,anecessarycomponentofanymathematicalmodeltodeterminethefateofchemicalsintheenvironment(1,2,3,4,5,6,7,8,9,10).1.1Thispracticedescribesspecificproceduresforobtainingsolutionhydrolysisrateconstantsandhalf-livesoforganicchemicalsthatmayentertheaquaticenvironment.1.2Solutionhydrolysisdataareobtainedinsterile,bufferedwaterusinglaboratorystudiesinwhichtheconcentrationofachemicalasafunctionoftimeismeasured.1.3Afour-tieredapproachisdescribed.Thetestingproceduresaredesignedtoprovidebasicandeasilyobtainableinformationinthefirsttier.Moredetailedandcostlyexperimentsareproposedinsubsequenttiers.Thisapproachismorecosteffectivethanonewhichprovidesfornosequentialassessment.1.4Sincealldetailsarenotcoveredinthispractice,successfulexecutionofthedescribedtestswillrequiresometrainingorexperienceintheareaofhydrolysis.Familiaritywiththematerialinthereferencesisessential.1.5Thispracticedescribeslaboratorystudies.Itisnotdesignedtoprovidedatadirectlyapplicabletotheenvironment.Extrapolationstospecificenvironmentalsituationsmayrequireadditionaldataortestsnotincludedinthispractice.1.6Thispracticedoesnotconsiderthepossiblehydrolyticinfluencesofdissolvedorganicmatterorofadsorption/catalysisbysuspendedmaterial.1.7Thispracticeiswrittentominimizecompetitiveprocessessuchasoxidation,reduction,substitution,andmicrobialreactions.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G04
【国际标准分类号】:71_080_01
【页数】:5P.;A4
【正文语种】:英语
