翻訳と辞書 Words near each other ・ Ambidexter (horse) ・ Ambidexterity ・ Ambidextrous (novel) ・ Ambidextrous organization ・ Ambidirectional dominance ・ Ambidédi ・ Ambiedes ・ Ambiegna ・ Ambiel Music ・ Ambience (album) ・ Ambience (sound recording) ・ Ambient ・ Ambient (album) ・ Ambient (desktop environment) ・ Ambient (novel) ・ Ambient air quality criteria ・ Ambient authority ・ Ambient awareness ・ Ambient backscatter ・ Ambient Blue ・ Ambient calculus ・ Ambient Compendium ・ Ambient construction ・ Ambient device ・ Ambient Devices ・ Ambient Dub Volume I ・ Ambient Entertainment ・ Ambient house ・ Ambient industrial ・ Ambient intelligence Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Ambient air quality criteria ： ウィキペディア英語版 Ambient air quality criteria Ambient air quality criteria or standards are concentrations of pollutants in the air (usually outdoor air but sometimes indoor air) specified for a variety of reasons including for the protection of human health, buildings, crops, vegetation, ecosystems, as well as for planning and other purposes. There is no internationally accepted definition but usually "standards" have some legal or enforcement aspect, whereas "guidelines" may not be backed by laws. "Criteria/criterion" can be used as a generic term to cover standards and guidelines. Various organisations have proposed crieria e.g. WHO, EU, US EPA and they are often similar - but not always, even if they are proposed for the same purpose (e.g. the protection of human health). == Specifying the Criteria == Important for any numerical standard is to ensure that averaging period, unit, and statistical measure are given (e.g. 98th percentile of houlry means measured over a calendar year in micrograms per cubic metre (µg/m3). Without all of these three aspects the criterion is confusing and meaningless. Criteria can be set in different units (e.g. µg/m3, µg/m3, parts per billion by volume (ppbv), parts per billion by mass (ppb(mass)), parts per million (ppm)) and it is possible to convert between all of these units if you know the molecular mass of the pollutant and the temperature at which you want to convert. Different temperatures are used throughout the world and so it is important to state the temperature of conversion (if relevant). Most pollutants have ambient criteria in the parts per billion (ppb)/µg/m3 range. Some have smaller units (e.g. dioxins are often in pico grams /m3); others have larger units (e.g. carbon monoxide (CO) in mg/m3). Particle pollution (e.g. PM10, PM1.0) is specified in units of mass (e.g. µg/m3) and not in units of volume (ppmv). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ambient air quality criteria」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.