IEC 60444-7-2004 石英晶体元件参数的测量.第7部分:石英晶体元件的放射性和频率下降测量

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【英文标准名称】:Measurementofquartzcrystalunitparameters-Part7:Measurementofactivityandfrequencydipsofquartzcrystalunits
【原文标准名称】:石英晶体元件参数的测量.第7部分:石英晶体元件的放射性和频率下降测量
【标准号】:IEC60444-7-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-04
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC49
【标准类型】:()
【标准水平】:()
【中文主题词】:频率测量;石英晶体;压电器件;晶体(电子);晶体谐振器;定义;冲击质量;电气工程;电子设备及元件;测量
【英文主题词】:Activity;Activitybearing;Batchtesting;Components;Crystalresonators;Crystals(electronic);Definitions;Deviations;Electricalengineering;Electricalmeasurement;Electronicengineering;Electronicequipmentandcomponents;Excitationquantity;Frequencies;Frequencymeasurement;Measurement;Measuringtechniques;Piezoelectric;Piezoelectricdevices;Quartzcrystals;Ratings;Resonanceresistance
【摘要】:Describestheprocedureformeasuringandevaluatingactivityandfrequencydipsforquartzcrystalunitsoveratemperaturerange.
【中国标准分类号】:L21
【国际标准分类号】:31_140
【页数】:14P.;A4
【正文语种】:英语


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【英文标准名称】:StandardTestMethodforAgarDiffusionCellCultureScreeningforCytotoxicity
【原文标准名称】:琼脂扩散细胞培养屏蔽细胞毒素的试验方法
【标准号】:ASTMF895-1984(2006)
【标准状态】:现行
【国别】:
【发布日期】:1984
【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】:F04.16
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:屏蔽;医学科学;试验;琼脂扩散试验;毒性;医疗设备
【英文主题词】:agardiffusion;biocompatibility;cellculture;cytotoxicitytesting
【摘要】:Thistestmethodisusefulforassessingthecytotoxicpotentialofnewmaterialsandformulationsandaspartofaqualitycontrolprogramforestablishedmedicaldevicesandcomponents.Thistestmethodassumesthatassessmentofcytotoxicityprovidesusefulinformationtoaidinpredictingthepotentialclinicalapplicationsinhumans.Cellculturemethodshaveshowngoodcorrelationwithanimalassaysandarefrequentlymoresensitivetocytotoxicagents.Thiscellculturetestmethodissuitableforincorporationintospecificationsandstandardsformaterialstobeusedintheconstructionofmedicaldevicesthataretobeimplantedintothehumanbodyorplacedincontactwithtissuefluidsorbloodonalong-termbasis.Somebiomaterialswithahistoryofsafeclinicaluseinmedicaldevicesarecytotoxic.Thistestmethoddoesnotimplythatallbiomaterialsmustpassthisassaytobeconsideredsafeforclinicaluse(PracticeF748).1.1Thistestmethodisappropriateformaterialsinavarietyofshapesandformaterialswhicharenotnecessarilysterile.Thistestmethodwouldbeappropriateinsituationswheretheamountofmaterialislimited.Forexample,smalldevicesorpowderscouldbeplacedontheagarandthepresenceofazoneofinhibitionofcellgrowthcouldbeexamined.1.1.1Thistestmethodisnotappropriateforleachableswhichdonotdiffusethroughagaroragarose.1.1.2Whiletheagarlayercanactasacushiontoprotectthecellsfromthespecimen,theremaybematerialswhicharesufficientlyheavytocompresstheagarandpreventdiffusionortocausemechanicaldamagetothecells.Thistestmethodwouldnotbeappropriateforthesematerials.1.2TheL-929celllinewaschosenbecauseithasasignificanthistoryofuseinassaysofthistype.Thisisnotintendedtoimplythatitsuseispreferred,onlythattheL-929isanestablishedcellline,well-characterizedandreadilyavailable,thathasdemonstratedreproducibleresultsinseverallaboratories.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:C05
【国际标准分类号】:07_100_10
【页数】:5P.;A4
【正文语种】:


基本信息
标准名称:12.65mm磁带VHS方式螺旋扫描盒式录像系统
英文名称:Helical-scan video sape cascette system using 12.6mm(0.5 in) magnetic tape on type VHS
发布日期:
实施日期:1987-11-27
首发日期:
作废日期:
出版日期:
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