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- SULFUR ISOTOPE RATIO OF SULFATE IN THE RAIN COLLECTED IN NOVEMBER AND DECEMBER 峨眉山雨水所含硫酸根的硫同位素组成
- The isotope ratio is directly used for comparing oils or gases. 同位素比率直接用于比较各种石油或天然气。
- The atmospheric helium isotope ratio: Is it changing? 大气氦同位素比率在变化吗?
- Many environmental processes can cause sulfur isotope fractionation.While microbial sulfate reduction plays a key role in sulfur isotope fractionation in surface environment. 许多环境过程可以引起硫同位素分馏，表生环境下微生物还原硫酸盐是最重要的硫同位素分馏过程。
- The Anqing copper deposit has a complicated sulfur isotope composition ,which can not be explained by the variations of a single sulfur source or the physico-chemical conditions. 安徽安庆铜矿床的硫同位素组成复杂，不能用单一硫源或物理化学条件的变化来解释。
- Stable isotope ratio analysis is an effective method for the identification of fruit juice adulteration. 稳定同位素分析法就是根据这种差异对掺假果汁进行准确鉴别的有效方法。
- There are differences between natural and adulterated juices in stable isotope ratio. 天然果汁与掺假果汁之间在稳定同位素比率方面存在着差异。
- To be sure, some scientists suggest that life could have evolved differently on Titan than on Earth or that the inorganic isotope ratio may be different there. 不过，还是有些科学家指出，可能是泰坦和地球上的生命演化过程不同，或是无机同位素比率不一样。
- Analytical services include potassium-argon age determinations, stable isotope ratio analyses, radiocarbon age determinations as well as other radiometric analyses. 分析包括钾-氩测年，稳定同位素丰度分析，放射性碳测年，以及其他放射性分析。
- SULFUR ISOTOPE OF THE TRIASSIC SEA 三叠纪海的硫同位素
- Keywords Deliquescent aerosol;SO 2;Sulfur isotope; 潮湿气溶胶;二氧化硫;硫同位素;
- An obvious restraint in the use of isotope ratios results from the need to employ mass spectrometers. 使用同位素比值法有着一个明显的局限因素，就是要用质谱仪进行分析。
- Sulfur isotopes suggest that sulfur mainly came from magma, with the entry of materials from inclosing rocks. 银来源于五台群、高于庄组白云质灰岩及次火山岩体,锰主要来源于高于庄组二段含锰灰岩。
- CAN STABLE ISOTOPE RATIOS PROVIDE FOR COMMUNITY-WIDE MEASURES OF TROPHIC STRUCTURE? 稳定性同位素与群落营养结构?
- Isotope ratios of Pb contained in wares were measured using Time-Of-Flight Secondary Ion Mass Spectrometry(TOF-SIMS)without any references. 介绍了用飞行时间二次离子质谱法对器物中的铅同位素比值的测量。
- A method by cumulative intensity of ion current to analyse isotopic ratio is proposed in present paper. 本文介绍了离子流强度累计测定同位素比的方法。
- First, it is a global record: there is remarkably little variation in isotope ratios in sedimentary specimens taken from different continental locations. 第一，它是全球性的记录：来自不同大陆位置的沉积物样品其同位素比例变化非常之小。
- Sea salt sulfate in the upper part of sediment column was dominantly reduced by AOM, and the remained sulfate involving reduction would probably cause positive sulfur isotopic excursion of pyrites. 海水源为主的硫酸盐参与了沉积物上部的AOM过程，黄铁矿硫稳定同位素正偏的原因可能与较强的AOM作用和较多的残余硫酸盐参与有关。
- The characteristics of sulfur isotopic and lead isotopic composition show that the gold deposits in this area are derived from the mantle and deep crust and are related to Mesozoic magmatism. 硫同位素和铅同位素成分显示,金来源于地幔和下地壳,与中生代的岩浆作用有关。
- gas isotope ratio mass spectrometer 气体同位素比质谱计
