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【英文标准名称】:Micrographics-StandardRecommendedPracticeforMicrofilmingPrintedNewspaperson35mmRollMicrofilm
【原文标准名称】:显微制图技术.在35mm卷轴胶片上缩微印制报纸的标准推荐实施规程.
【标准号】:ANSI/AIIMMS111-1987
【标准状态】:作废
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【发布单位】:美国国家标准学会(US-ANSI)
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【标准类型】:()
【标准水平】:()
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【英文主题词】:
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【中国标准分类号】:
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【英文标准名称】:Sensoryanalysis-Methodology-Generalguidanceformeasuringodour,flavourandtastedetectionthresholdsbyathree-alternativeforced-choice(3-AFC)procedure
【原文标准名称】:感官分析.方法学.用三点选配(3-AFC)法测定气味、香味和味觉探测阈值的通用指南
【标准号】:ISO13301-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-09
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC34
【标准类型】:()
【标准水平】:()
【中文主题词】:阈值;方法学;定义;味觉;香味;检测极限;食品;感官分析(食品);指导手册;气味测定法;方法;农产品
【英文主题词】:Agriculturalproducts;Aroma;Definitions;Detectionlimit;Foodproducts;Guidebooks;Methodologies;Methods;Odorimetry;Sensoryanalysis(food);Taste;Thresholdvalue
【摘要】:ThisInternationalStandardprovidesguidanceon:—obtainingdataonthedetectionofchemicalstimulithatevokeresponsestoodour,flavourandtastebya3-AFC(three-alternativeforced-choice)procedure;—theprocessingofthedatatoestimatethevalueofathresholdanditserrorbounds,andotherstatisticsrelatedtothedetectionofthestimulus.Typically,theprocedureswillbeusedinoneofthefollowingtwomodes:—investigationofthesensitivityofassessorstospecificstimuli;—investigationoftheabilityofachemicalsubstancetostimulatethechemoreceptivesenses.(Althoughexperimentsmayencompassbothmodes.)Examplesofthefirstmodewouldincludestudiesofthedifferencesamongindividualsorspecifiedpopulationsofindividualsinsensitivitiesandoftheeffectsofage,gender,physiologicalcondition,disease,administrationofdrugsandambientconditionsonsensitivity.Examplesofthelattermodewouldinclude:—studiesinflavourchemistryandtheimpactofspecifiedchemicalsontheflavouroffoods;—classificationofchemicalsfortheirimpactonhumans,ifpresentintheenvironment;—studiesontherelationshipofmolecularstructuretocapacityofachemicaltoactasastimulant;—qualityassuranceofgaseouseffluentsandofwater,foodsandbeverages;—studiesinthemechanismofolfaction.Inbothmodesthewayinwhichprobabilityofacorrectresponsechangeswithintensityofstimulus,i.e.theslopeofthedose/responsecurve,couldbeanimportantaspectofthestudyaswellasthethresholdvalue,andthedataprocessingproceduresdescribedhereprovidethisinformation.ThefocusofthisInternationalStandardisondatarequirementsandoncomputationalprocedures.Regardingthevalidityofthedata,thetextisrestrictedtogeneralrulesandprecautions.Itdoesnotdifferentiatebetweendetectionanddifferencethresholds;fundamentally,theproceduresmeasureadifferencethresholdbecauseatestsampleiscomparedwithareferencesample.Typically,thereferencesampleisnotintendedtocontainthestimulusunderinvestigation,buttheGuidelinesdonotexcludeexperimentaldesigninwhichthereferencecouldcontainthestimulus,oritmightnotbeknownifthereferencecontainsthestimulus.TheGuidelinesdonotmeasurearecognitionthresholdasdefinedinISO5492.TheydonotaddressthestandardizationofmethodsofdeterminingairqualityasaEuropeanStandardisinpreparation[9].
【中国标准分类号】:X04
【国际标准分类号】:67_240
【页数】:27P.;A4
【正文语种】:英语