【英文标准名称】:StandardPracticeforSamplingPhytoplanktonwithConicalTowNets
【原文标准名称】:用圆锥拖网取样可繁殖海洋浮游生物的标准实施规程
【标准号】:ASTMD4132-1982(2004)
【标准状态】:现行
【国别】:
【发布日期】:1982
【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】:(Practice)
【标准水平】:()
【中文主题词】:资源取回;浮游生物;抽样方法;渔网;污染控制;水质
【英文主题词】:
【摘要】:Theadvantagesofconicaltownetsareasfollows:3.1.1Theyarerelativelyinexpensive,easytoconstruct,andhighlyversatileinavarietyofsurfacewaters.3.1.2Theycanbeusedfromasmallpoweredboatwithaminimumofauxiliaryequipment.3.1.3Theyprovideasimplemeansbywhichtocollectqualitativesamplesofmacro-andmicro-plankton.3.1.4Theycanbeadaptedwithaflowmetertocollectsemiquantitativesamplesofmacro-andmicro-plankton.Thedisadvantagesofconicaltownetsareasfollows:3.2.1Theyareeffectiveonlywheredrawnthroughastratumofwaterhavingconsiderablethickness.Theyarenotsuitableforcollectingsamplesfromasmallorrestrictedregion.3.2.2Theyarenotsuitableforcollectionsinveryshallowwater.3.2.3Theycollectonlyqualitativesamples,orsemiquantitativesampleswhenusedwithaflowmeter.3.2.4Cloggingofthenetbyextraneousmaterials,suchasfloatingvascularplantsordebriscancauseerroneousresults.3.2.5Ifdiscretedepthsaresampledusingahorizontaltow,thesamplecanbecontaminatedwithorganismsfromotherdepthsduringthedeploymentandretrievalofthesamples.Thereareseveralspecialconsiderationsthatshallbeobservedwhenusingconicaltownets.Theyareasfollows:3.3.1Theconicalnetsamplersaredesignedtobetowedatspeedslessthan3knots;however,greaterspeedshavebeenusedforthelargernetswithaconcomitantincreaseincapture.3.3.2Althoughthereisatendencytousethesmallestmeshsizeavailable,thereistheliabilityofsmallmeshsizesreducingthecollectionefficiencyandincreasingequipmentfailurethroughtearing.3.3.3Ifdiscretedepthsamplesarerequired,anopeningandclosingnetdeviceshouldbeinstalledonthesampler.3.3.4Thenetsshouldbewashedfrequentlyandinspectedforpin-sizeholes,tears,netdeterioration,andotheranomalies.3.3.5Followinguse,wetnetsshouldbesuspendedfulllengthinairandinsubduedlightandallowedtodry.1.1Thispracticecoverstheproceduresforobtainingqualitativesamplesofaphytoplanktoncommunitybyuseofconicaltownets.Netswillnotretainallphytoplanktontaxa;forexample,nannoplanktonandultraplanktongenerallywillpassthroughanet.1.1Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:
【页数】:2P.;A4
【正文语种】:


【英文标准名称】:Imagingmaterials-Processedsafetyphotographicfilms-Storagepractices
【原文标准名称】:成像材料.冲洗的安全照相底板.存储操作规程
【标准号】:ISO18911-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-09
【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/TC42
【标准类型】:()
【标准水平】:()
【中文主题词】:空气调节;档案;定义(术语);已曝光摄影胶片;文档;胶片识别;胶片材料;影片;湿度;长时存储;摄影胶片;摄影材料;摄影;感光纸;光敏性;图象录制;保存;插孔;存储;存储条件;温度
【英文主题词】:Airconditioning;Archives;Definitions;Exposedphotographicfilm;Filing;Filmidentification;Filmmaterials;Films;Humidity;Long-timestorage;Photographicfilm;Photographicmaterials;Photography;Photosensitivepapers;Photosensitivity;Picturerecording;Preservation;Receptacles;Storage;Storagecondition;Temperature
【摘要】:
【中国标准分类号】:
【国际标准分类号】:37_040_20
【页数】:25P;A4
【正文语种】:英语