标准资料网-标准资料免费资源平台

【英文标准名称】:Microbiology;generalguidancefortheenumerationofcoliforms;mostprobablenumbertechnique
【原文标准名称】:微生物学大肠杆菌菌落计数通用指南最大可能数技术
【标准号】:ISO4831-1991
【标准状态】:作废
【国别】:国际
【发布日期】:1991-03
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC34
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;微生物学;微生物;农产品;食品;计数;微生物分析;饲料;细菌纲;大肠杆菌类
【英文主题词】:Agriculturalproducts;Animalfeed;Bacteria;Coliformbacteria;Counting;Foodproducts;Microbiologicalanalysis;Microbiology;Microorganisms;Testing;Tests
【摘要】:Thissecondeditioncancelsandreplacesthefirstedition(ISO4831:1978).ItisintendedtoprovidegeneralguidancefortheexaminationofproductsnotdealtwithbyexistingInternationalStandards.Theseguidelinesmaynotbeappropriateforsomeproductsineverydetail,andforsomeotherproductsitmaybenecessarytousedifferentmethods.ThetechniquedescribedhereislessprecisethanthatdescribedinISO4832.Givesreferences,andthedefinitionofthetermcoliforms.Specifiesprinciple,culturemediaanddilutionfluid,apparatusandglassware,sampling,preparationofthetestsample,procedure,expressionofresultsandtestreport.
【中国标准分类号】:A40
【国际标准分类号】:07_100_30
【页数】:11P;A4
【正文语种】:英语


Product Code:SAE J551/4
Title:Test Limits and Methods of Measurement of Radio Disturbance Characteristics of Vehicles and Devices, Broadband and Narrowband, 150 kHz to 1000 MHz
Issuing Committee:Electromagnetic Compatibility (Emc) Standards
Scope: This SAE Standard contains test limits and procedures for the measurement of radio disturbances in the frequency range of 150 kHz to 1000 MHz. The document applies to any electronic/electrical component intended for use in vehicles. Refer to International Telecommunications Union (ITU) Publications for details of frequency allocations. The test limits are intended to provide protection for receivers installed in a vehicle from disturbances produced by components/ modules in the same vehicle. The receiver types to be protected are: broadcast radio and TV, land-mobile radio, radio telephone, amateur and citizens' radio. The limits in this document are recommended and subject to modification as agreed between the vehicle manufacturer and the component supplier. This document shall also be applied by manufacturers and suppliers of components and equipment which are to be added and connected to the vehicle harness or to an on-board power connector after delivery of the vehicle. This document does not include protection of electronic control systems from RF emissions, or from transient or pulse type voltage fluctuations. These subjects are covered in other sections of SAE J551 and in SAE J1113.