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BS EN ISO 21569-2005 食品.转基因有机体和衍生物探测分析法.定性核酸法

作者:标准资料网 时间:2024-05-03 05:55:27  浏览:8338   来源:标准资料网
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【英文标准名称】:Foodstuffs-Methodsofanalysisforthedetectionofgeneticallymodifiedorganismsandderivedproducts-Qualitativenucleicacidbasedmethods
【原文标准名称】:食品.转基因有机体和衍生物探测分析法.定性核酸法
【标准号】:BSENISO21569-2005
【标准状态】:现行
【国别】:英国
【发布日期】:2005-10-21
【实施或试行日期】:2005-10-21
【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】:分析;食物链反应;化学分析和试验;污染;定义;DNA;食品检验;食品;食品检验;基因改进;基因产品;遗传工程;在实验室条件下;说明书;调查;实验室;实验室设备;实验室试验;分析方法;微生物食品;微生物分析;微生物学;微生物;最低要求;核酸;生物体;性能要求;聚合酶;聚合酶食物链;质量保证;筛分法;规范(验收);试验;验证
【英文主题词】:Analysis;Chainreactions;Chemicalanalysisandtesting;Contamination;Definition;Definitions;DNA;Foodinspection;Foodproducts;Foodtesting;Genemodified;Geneproduct;Geneticengineering;Invitro;Instructions;Investigations;Laboratories;Laboratoryequipment;Laboratorytesting;Laboratorytests;Methodsofanalysis;Microbialfoods;Microbiologicalanalysis;Microbiology;Microorganisms;Minimumrequirements;Nucleicacids;Organisms;PCR;Performancerequirements;Polymerase;Polymerasechainreaction;Qualityassurance;Screening-method;Specification(approval);Testing;Verification
【摘要】:ThisInternationalStandarddescribestheproceduretoqualitativelydetectgeneticallymodifiedorganisms(GMOs)andderivedproductsbyanalysingthenucleicacidsextractedfromthesampleunderstudy.Themainfocusisonpolymerasechainreaction(PCR)basedamplificationmethods.Itgivesgeneralrequirementsforthespecificdetectionandidentificationoftargetnucleicacidsequences(DNA)andfortheconfirmationoftheidentityoftheamplifiedDNAsequence.Guidelines,minimumrequirementsandperformancecriterialaiddowninthisInternationalStandardareintendedtoensurethatcomparable,accurateandreproducibleresultsareobtainedindifferentlaboratories.ThisInternationalStandardhasbeenestablishedforfoodmatrices,butcouldalsobeappliedtoothermatrices(e.g.feedandplantsamplesfromtheenvironment).SpecificexamplesofmethodsareprovidedinAnnexesAtoD.
【中国标准分类号】:C53
【国际标准分类号】:67_050
【页数】:80P.;A4
【正文语种】:英语


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【英文标准名称】:StandardTestMethodforDielectricBreakdownVoltageofInsulatingLiquidsUsingDiskElectrodes
【原文标准名称】:用圆盘电极测定绝缘液体介电击穿电压的标准试验方法
【标准号】:ASTMD877-2002(2007)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D27.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;绝缘液体
【英文主题词】:breakdownvoltage;dielectricstrength;diskelectrodes;electricalinsulatingliquids;testcup
【摘要】:Thedielectricbreakdownvoltageisameasureoftheabilityofaninsulatingliquidtowithstandelectricalstress.Thepower-frequencybreakdownvoltageofaliquidisreducedbythepresenceofcontaminantssuchascellulosicfibers,conductingparticles,dirt,andwater.Alowresultinthistestmethodindicatesthepresenceofsignificantconcentrationsofoneormoreofthesecontaminantsintheliquidtested.SeeAppendixX1.Ahighbreakdownvoltagemeasuredinthistestmethoddoesnotnecessarilyindicatethattheamountofthecontaminantspresentinaliquidfromwhichthesamplewastakenaresufficientlylowforthesampledliquidtobeacceptableinallelectricalequipment.TestMethodD877isnotsensitivetolowlevelsofthesecontaminants.Breakdowninthistestmethodisdominatedbyeventsoccurringattheelectrodeedges.Thevoltagestressdistributionbetweentheparalleldiskelectrodesusedinthistestmethodarequasi-uniformandthereissubstantialstressconcentrationatthesharpedgesoftheflatdiskfaces.Thistestmethodmaybeusedforevaluationofinsulatingliquidsinequipmentthatisdesignedtobefilledwithunprocessedliquidsasdeliveredbyavendor.Thistestmethodisnotrecommendedforevaluationofthebreakdownvoltageofliquidsusedinequipmentthatrequirestheapplicationofvacuumandfilteringoftheoilbeforebeingplacedintoservice.TestMethodD1816shouldbeusedtodeterminethebreakdownvoltageoffilteredanddegassedliquids.Thistestmethodisusedinlaboratoryorfieldtests.Forfieldbreakdownresultstobecomparabletolaboratoryresults,allcriteriaincludingroomtemperature(20to30x00B0;C)mustbemet.1.1Thistestmethoddescribestwoprocedures,AandB,fordeterminingtheelectricalbreakdownvoltageofinsulatingliquidspecimens.Thebreakdowntestusesacvoltageinthepower-frequencyrangefrom45to65Hz.1.2Thistestmethodisusedtojudgeifthediskelectrodebreakdownvoltagerequirementsaremetforinsulatingliquids,asdeliveredfromthemanufacturer,thathaveneverbeenfilteredordried.SeeSpecificationD3487,SpecificationD4652,andGuideD5222fortheminimumspecifiedelectricalbreakdown.ThistestmethodshouldbeusedasrecommendedbyprofessionalorganizationstandardssuchasIEEEC57.106.1.3LimitationsoftheProcedures1.3.1Thesensitivityofthistestmethodtothegeneralpopulationofcontaminantspresentinaliquidsampledecreasesasappliedtestvoltagesusedinthistestmethodbecomegreaterthanapproximately25kVrms.1.3.2Iftheconcentrationofwaterinthesampleatroomtemperatureislessthan60%ofsaturation,thesensitivityofthistestmethodtothepresenceofwaterisdecreased.ForfurtherinformationrefertoRR:D27-1006.1.3.3Thesuitabilityforthistestmethodhasnotbeendeterminedforaliquid''sviscosityhigherthan900cStat40C.1.4ProcedureApplications1.4.1ProcedureAProcedureAisusedtodeterminethebreakdownvoltageofliquidsinwhichanyinsolublebreakdownproductseasilysettleduringtheintervalbetweentherequiredrepeatedbreakdowntests.Theseliquidsincludepetroleumoils,hydrocarbons,andaskarels(PCB)usedasinsulatingandcoolingliquidsintransformers,cables,andsimilarapparatus.ProcedureAmaybeusedtoobtainthedielectricbreakdownofsiliconefluidasspecifiedinTestMethodsD2225,providedthedischargeenergyintothesampleislessthan20mJ(millijoule)perbreakdownforfiveconsecutivebreakdowns.1.4.2ProcedureBThisprocedureisusedtodeterminethebreakdownvoltageofliquidsinwhichanyinsolublebreakdownproductsdonotcompletelysettlefromthe......
【中国标准分类号】:K15
【国际标准分类号】:29_040_10
【页数】:6P.;A4
【正文语种】:


【英文标准名称】:Supraconductivity-Part12:matrixtosuperconductorvolumeratiomeasurement-Coppertonon-coppervolumeratioofNb3Sncompositesuperconductingwires.
【原文标准名称】:超导性.第12部分:基体与超导体体积比的测量.铌锡复合超导金属线的铜对非铜体积之比
【标准号】:NFC31-888-12-2003
【标准状态】:现行
【国别】:法国
【发布日期】:2003-05-01
【实施或试行日期】:2003-05-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:H80
【国际标准分类号】:17_220_20;29_050
【页数】:18P;A4
【正文语种】:其他



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