MIL-PRF-17951E (AMENDMENT 2)
时间:2024-05-13 03:01:05 来源: 标准资料网 作者：标准资料网 阅读：9569
MIL-PRF-17951E (AMENDMENT 2), MILITARY SPECIFICATION, DECK COVERING, LIGHTWEIGHT, NONSLIP, ABRASIVE PARTICLE COATED FABRIC, FILM, OR COMPOSITE AND SEALING COMPOUND (17 SEP 1992) [SUPERSEDING MIL-D-17951E]., This amendment forms a part of MIL-D-17951E(SH), dated 20 July 1988, and is approved for use by the Naval Sea Systems Command Department of the Navy and is available for use by all Departments and Agencies of the Department of Defense.
【英文标准名称】:StandardGuideforConductingStaticToxicityTestswithMicroalgae
【原文标准名称】:用微型海藻做静态毒性试验的标准指南
【标准号】:ASTME1218-2004e1
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E47.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:导则;微生物学;水;毒性
【英文主题词】:algae;algal-toxicitytesting;aquaticplants;aquatictoxicitytesting;microalgae
【摘要】:Testswithalgaeprovideinformationonthetoxicityoftestmaterialstoanimportantcomponentoftheaquaticbiotaandmightindicatewhetheradditionaltesting(1)4isdesirable.Algaeareubiquitousinaquaticecosystems,wheretheyincorporatesolarenergyintobiomass,produceoxygen,functioninnutrientcyclingandserveasfoodforanimals.Becauseoftheirecologicalimportance,sensitivitytomanytoxicants,readyavailability,easeofculture,andfastgrowthrates(renderingitpossibletoconductamulti-generationtestinashortperiodoftime),algaeareoftenusedintoxicitytesting.Resultsofalgaltoxicitytestsmightbeusedtocomparethesensitivitiesofdifferentspeciesofalgaeandthetoxicitiesofdifferentmaterialstoalgaeandtostudytheeffectsofvariousenvironmentalfactorsonresultsofsuchtests.Resultsofalgaltoxicitytestsmightbeanimportantconsiderationwhenassessingthehazardsofmaterialstoaquaticorganisms(SeeGuideE1023)orderivingwaterqualitycriteriaforaquaticorganisms(2).Resultsofalgaltoxicitytestsmightbeusefulforstudyingbiologicalavailabilityof,andstructure-activityrelationshipsbetween,testmaterials.Resultsofalgaltoxicitytestswilldependonthetemperature,compositionofthegrowthmedium,andotherfactors.Thesetestsareconductedinsolutionsthatcontainconcentrationsofsalts,minerals,andnutrientsthatgreatlyexceedthoseinmostsurfacewaters.Theseconditionsmayover-orunder-estimatetheeffectsofthetestmaterialifdischargedtosurfacewaters.1.1Thisguidecoversproceduresforobtaininglaboratorydataconcerningtheadverseeffectsofatestmaterialaddedtogrowthmediumongrowthofcertainspeciesoffreshwaterandsaltwatermicroalgaeduringastaticexposure.Theseprocedureswillprobablybeusefulforconductingshort-termtoxicitytestswithotherspeciesofalgae,althoughmodificationsmightbenecessary.Althoughthetestdurationiscomparabletoanacutetoxicitytestwithaquaticanimals,analgaltoxicitytestofshortduration(72,96or120h)allowsforexaminationofeffectsuponmultiplegenerationsofanalgalpopulationandthusshouldnotbeviewedasanacutetoxicitytest.1.2Othermodificationsoftheseproceduresmightbejustifiedbyspecialneedsorcircumstances.Althoughusingappropriateproceduresismoreimportantthanfollowingprescribedprocedures,resultsoftestsconductedusingunusualproceduresarenotlikelytobecomparabletoresultsofmanyothertests.Comparisonofresultsobtainedusingmodifiedandunmodifiedversionsoftheseproceduresmightprovideusefulinformationconcerningnewconceptsandproceduresforconductingtoxicitytestswithmicroalgae.1.3Theseproceduresareapplicabletomanychemicals,eitherindividuallyorinformulations,commercialproducts,orknownmixtures.Withappropriatemodifications,theseprocedurescanbeusedtoconducttestsontemperature,andpHandonsuchmaterialsasaqueouseffluents(seealsoGuideE1192),leachates,oils,particulatematter,sediments,andsurfacewaters.Statictestsmightnotbeapplicabletomaterialsthatarehighlyvolatile,arerapidlybiologicallyorchemicallytransformedinaqueoussolutions,orareremovedfromtestsolutionsinsubstantialquantitiesbythetestvesselsororganismsduringthetest.However,practicalflow-throughtestprocedureswithmicroalgaehavenotbeendeveloped.1.4Resultsoftestsusingmicroalgaeshouldusuallybereportedintermsofthe96-h(orothertimeperiod)IC50(see)basedonreductioningrowth.Insomesituations,itmightonlybenecessarytodeterminewhetheraspecificconc......
【中国标准分类号】:Z16
【国际标准分类号】:07_100_20
【页数】:14P.;A4
【正文语种】:
【英文标准名称】:Aerospaceseries;bearings,airframerolling-Rigidsinglerowballbearingsincorrosionresistingsteel-Diameterseries0and2;normalclearancecategory;dimensionsandloads;GermanversionEN3286:1994
【原文标准名称】:航空航天系列.机体用轴承.不锈钢刚性单列滚珠轴承.直径系列0和直径系列2.公称公差范畴.尺寸和负载;德文版本EN3286:1994
【标准号】:DINEN3286-1994
【标准状态】:现行
【国别】:德国
【发布日期】:1994-11
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:间隙;航空航天运输;滚珠轴承;安全工作荷载;有槽球轴承;特性;钢;飞机机架轴承;扭矩;耐腐蚀钢;航空运输;符号;轴承;单列轴承;材料;内间隙;飞机机架;负荷;航天运输;规范(批准);尺寸;静荷载
【英文主题词】:Aerospacetransport;Airtransport;Airframebearings;Airframes;Ballbearings;Bearings;Clearances;Corrosion-resistantsteels;Dimensions;Groovedballbearings;Internalclearances;Loading;Materials;Properties;Safeworkingload;Single-rowbearings;Spacetransport;Specification(approval);Staticloading;Steels;Symbols;Torque
【摘要】:Thisdocumentspecifiesthecharacteristicsofrigidsinglerowballbearingsofdiameterserie0and2designedtowithstandonlyslowrotationsandoscillationsunderload.
【中国标准分类号】:V22
【国际标准分类号】:49_035
【页数】:9P.;A4
【正文语种】:德语