1.The contamination of isotope is an important factor that affects radioactivity isotope tracer injection profile logging, and the application of "GTP tiny ball without radioactivity" is an efficient way to eliminate contamination of isotope.
摘要同位素沾污是影响放射性同位素示踪注水剖面测井的一个重要因素，采用“冷球”是减少同位素沾污的一种有效手段。
2.According to the comparison and analysis of mineral composition and geochemical characteristics of trace element, sulfur isotope, hydrogen and oxygen isotope, lead isotope and rare earth element in the gold ore and the altered spilite from the deposits of Huachanggou Gold Mine, it was confirmed that the gold ore had obvious succession of the basic igneous rock.
摘要通过对铧厂沟金矿床金矿石和蚀变细碧岩矿物组成、微量元素、硫同位素、氢氧同位素、铅同位素及稀土元素地球化学特征地对比分析，得出金矿石对该基性火山岩存在明显的继承性。
3.An image recorded on a photographic film or plate produced by the radiation emitted from a specimen, such as a section of tissue, that has been treated or injected with a radioactively labeled isotope or that has absorbed or ingested such an isotope.
自动射线照相通过一个标本发出辐射而产生于照相胶卷上或底片上的影象，比如组织的一部分，经过处理或用放射性标记的同位素注射或吸收或吞入这样一种同位素
4.The development of high sensitivity gas chromatography/isotope ratio mass spectrometry (GC/IRMS) techniques makes the compound-specific isotope analysis (CSIA) a new approach to elucidating the source and fate of a variety of natural and anthropogenic organic pollutants in the geochemical system.
高分辨率色谱 同位素比值质谱(GC IRMS)技术的不断发展,使单体有机化合物的稳定同位素分析方法(CSIA)日趋成熟,并广泛应用于环境有机污染研究领域,成为有机污染物的来源判识和污染过程示踪的有力工具。
5.Discussed the principal features of the strontium isotope composition in oceanic carbonates and the sulfur isotope composition (pyrites)in the black shale,as well as the significance of the palao-oceanic geology in the Middle Cretaceous in the South Tibet, as follows.
讨论了西藏南部中白垩世海相碳酸盐锶同位素组成和黑色页岩中黄铁矿硫同位素组成的主要特征及其古海洋地质意义。
6.Their 18O isotope composition is usually about -10‰(PDB),13C isotope composition is generally between 1.5-2‰(PDB).
其~(18)O同位素组成一般在-10‰(PDB)左右,~(13)C的同位素组成一般在1.5—2‰(PDB)左右。
7.Compound-specific isotope analysis(CSIA) is a new approach in this field. It provides more abundant and precise information in the studies of marine food web compared to stable isotope analysis for bulks and tissues.
特定化合物同位素分析(CSIA)技术是一项研究海洋食物网的新技术,较测定总有机物的稳定同位素技术,为海洋食物网研究提供了更为深入和丰富的信息。
8.The stable isotopic research is established by studying the discrepancy in isotope ratio, which was caused by isotope fractionation, and the isotopic ratio difference can be determined by mass spectrometer.
稳定同位素的研究主要是建立在此同位素分化作用所造成的同位素比值差异，而此同位素比值差异可被质谱仪测知。
9.distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions.
用放射性同位素或不寻常质量的同位素使元素或原子显示运动踪迹。
10.Ab initio quantum chemistry calculations based on Urey model(1947) has been performed on FeCN3-6 and FeCN4-6.The significant changes of Fe isotope fractionation factors of FeCN6 has been found under different spin statuses of Fe. This finding also suggests that the pressure-induced spin transitions will cause significant changes of isotope fractionation.
用基于Urey模型的量子化学从头计算,揭示Fe在FeCN63-和FeCN46-中的不同“自旋态”对同位素分馏行为的巨大影响,说明了只考虑“价态”的做法是不正确的,修正了关于“重同位素倾向于富集在高价化合物中”的这个广泛被接受的基本原理。
