查询词典 isotope

And therefore it has the potential applications in green chemistry and chemical process,organic reactions areas.The literature review section of the thesis gave a brief introduction of the important applications in the green chemical process as well as the status of organic reactions research in NCW,and also summarized the applications in different kind of reactions such as hydrolysis,dehydration/hydration,alkylation,acylation, Diels-Alder reactions,rearrangements,condensations,hydrogen isotope exchange reaction,oxidation-reduction reaction,organometallic reactions.

论文的综述部分简要介绍了近临界水在绿色化工过程中的重要应用价值和国内外在近临界水中进行有机化学反应的研究现状，以及以近临界水作为反应溶剂或催化剂在水解反应、脱水/水合反应、烷基化、酰基化、Diels-Alder反应、重排反应、缩合、氢同位素交换反应、氧化还原反应、有机金属反应等反应类型中的应用。

Foliar carbon isotope composition δ~(13C, long-term water use efficiency, photosynthesis, and stomata of different Populus deltoids clones were studied under different water treatments.

该文测定并研究了不同水分处理下，不同黑杨无性系的长期水分利用效率、叶片δ~(13)C、光合作用、气孔及其相互关系。

To find out the causes for tellurium enrichments in deep-sea sediments,the authors analyzed and compared tellurium concentrations and helium isotope compositions in the magnetic parts and those in the bulk samples of deep-sea sediments.

为了查明深海沉积物中碲异常的原因，笔者对比分析了深海沉积物中磁性部分与全岩的碲含量和氦同位素组成。

Combined with the former studies and dating, it is believed that the area around the Tanggula Pass has experienced four major Pleistocene Glaciations, corresponding to marine isotope stage 2, 3, 4 and 6, respectively, and two Holocene glacial advances （the Neoglaciation and the Little Ice Age）.

在野外综合考察的基础上，对唐古拉山垭口地区末次冰期的冰碛漂砾进行了宇生核素^10Be暴露年龄的测定，得到（16.1 1.7）kaBP、（31.9 3.4）kaBP、（41.4 4.3）kaBP和（66.8 4.3）kaBP4个测年数据。

There are large variations in the concentration and isotope composition of bulk carbon for the A-type granites in eastern China.

中国东部A型花岗岩碳含量和同位素组成具有较大的变化范围，分别为500～5600ppm和-33.8～-16.4‰。

Re is moderately incompatible element, while Os is highly compatible. As they are highly siderophile, ReOs isotopic system can provide unique insight in dating and tracing research compared to other longlived radiogenic isotope systems (e.g. RbSr, SmNd, UThPb ) which involve lithophile elements partitioning into silicate rather than metal or sulfide.

Re为中等不相容元素，Os则属强相容元素，与母子体均为不相容元素的RbSr、SmNd、UThPb等同位素体系相比，具亲铁、亲硫性的ReOs同位素体系在定年和示踪研究中显示出特殊性，受到了地学家高度重视，其应用正走向普及。

It is considered that, just as those of pelagic sediments, the anomaloushelium isotope ratios of nodules can be attributed to micrometeorite interplanetary dust particles.

根据地外~3He的通量和结核、沉积物中地外~3He的含量计算了结核的生长速率和沉积物的沉积速率。

Isotope geochemistry of noble gases Expounded the relations of 3 He4He ratio and the classif ication of tecto nic regions in China, the composite storage of mantle helium, the controversy of mantle methane and the gas-source rock correlation.

稀有气体同位素地球化学阐述了3He4He值与中国构造分区，幔源氦的复合成藏和幔源甲烷问题以及气源对比等3。

With the high sensitivity and high resolution of the CO intracavity Laser Magnetic Resonance spectrometer, the high-resolution spectra of the rare isotope molecule ~(15)N~(16)O in natural abundance were successfully observed, which provided experimentai data for the analysis of the hyperfine structure of NO molecule.

通过对中红外CO内腔激光磁共振光谱仪的改造，我们大大提高了该谱仪的探测灵敏度和分辨率，并成功用于探测NO稀有同位素分子~(15)N~(16)O的超高分辨光谱，为该分子的超精细结构和Λ-双分裂分析提供了实验依据。

The spectral structure of spontaneous emission of copper atom at 510.6nm and 578.2nm was calculated considering the hyperfine structure of energy levels and the isotope shift.

真空系统的扩散泵可把激光管抽至10-2Pa的真空度，排除杂质使激光工作更稳定，可控制充入氖气的气压。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。