翻訳と辞書 Words near each other ・ Stable algorithm ・ Stable bandage ・ Stable belt ・ Stable cell ・ Stable Companions ・ Stable curve ・ Stable distribution ・ Stable equilibrium ・ Stable fly ・ Stable Gallery ・ Stable group ・ Stable hashing ・ Stable homotopy theory ・ Stable Image Platform ・ Stable isotope labeling by amino acids in cell culture ・ Stable isotope ratio ・ Stable Mable ・ Stable manifold ・ Stable manifold theorem ・ Stable map ・ Stable marriage problem ・ Stable Master ・ Stable Mates ・ Stable model category ・ Stable model semantics ・ Stable module category ・ Stable normal bundle ・ Stable nucleic acid lipid particle ・ Stable nuclide ・ Stable ocean hypothesis 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 Stable isotope ratio ： ウィキペディア英語版 Stable isotope ratio The term stable isotope has a similar meaning to stable nuclide, but is preferably used when speaking of nuclides of a specific element. Hence, the plural form stable isotopes usually refers to isotopes of the same element. The relative abundance of such stable isotopes can be measured experimentally (isotope analysis), yielding an isotope ratio that can be used as a research tool. Theoretically, such stable isotopes could include the radiogenic daughter products of radioactive decay, used in radiometric dating. However, the expression stable isotope ratio is preferably used to refer to isotopes whose relative abundances are affected by isotope fractionation in nature. This field is termed stable isotope geochemistry. ==Stable isotope ratios== Measurement of the ratios of naturally occurring stable isotopes (isotope analysis) plays an important role in isotope geochemistry, but stable isotopes (mostly carbon, nitrogen and oxygen) are also finding uses in ecological and biological studies. Other workers have used oxygen isotope ratios to reconstruct historical atmospheric temperatures, making them important tools for paleoclimatology. Commonly analysed stable isotope systems include those of oxygen, carbon, nitrogen, hydrogen and sulfur. These isotope systems for lighter elements that exhibit more than one primordial isotope for each element, have been under investigation for many years in order to study processes of isotope fractionation in natural systems. The long history of study of these elements is in part because the proportions of stable isotopes in these light and volatile elements is relatively easy to measure. However, recent advances in isotope ratio mass spectrometry (i.e. multiple-collector inductively coupled plasma mass spectrometry) now enable the measurement of isotope ratios in heavier stable elements, such as iron, copper, zinc, molybdenum, etc. 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「Stable isotope ratio」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.