查询词典 isotopes

Technetium are radioactive isotopes, the longest life expectancy is 943Tc and 9843Tc.

锝都是放射性同位素，寿命最长的是943Tc和9843Tc。

As pyrites from Archean black shales worldwide show similar Fe iso- tope features to those from the two Chinese sulfide deposits, the enrichment of light Fe isotopes in early Precambrian ocean is likely to be regional, or even global.

导致早前寒武纪海洋富集Fe轻同位素的原因是海水中大量的Fe被氧化形成了富集Fe重同位素的磁铁矿和赤铁矿。

Tritium is one of the mildest radioactive isotopes.

氚是最和缓的放射性同位素之一。

As regards environmental protection, WMO's Global Atmospheric Watch monitors the chemical composition of the atmosphere including greenhouse gases, the ozone layer and ultra-violet radiation, as well as long-range transport of pollutants, aerosols, reactive gases and radioactive isotopes.

在环境保护方面，WMO的全球大气监视网对包括温室气体在内的大气化学成分，臭氧层和紫外辐射以及污染物、气溶胶、再活化气体和辐射同位素的长期距离传输进行监测。

The separation of multi-component stable isotopes in aceatrifuge cascade has been shown to be a set of functions of an overall separation factor per unit relative molecular mass difference.

通过对不同形式的离心级联进行丰度计算，得到任意两种组分间的全分离因子与它们的相对分子质量之差成指数关系。

The naturally occurring stable carbon and nitrogen isotopes were used as tracers to study the influence of different ecological factors on the two isotopic compositions in different weever tissues under the control conditions in the metabolic process, and the stable isotope fractionation in weever tissues in metabolic process was used to study the flow pathway of nutrient and energy for food web in the ecological system.

利用天然存在的碳氮稳定同位素作为示踪剂，研究了在受控条件下驯养的鲈鱼的新陈代谢过程中不同生态因子(水温、摄食水平、体重等)对鲈鱼体内不同组织的碳氮稳定同位素组成的影响。通过鲈鱼新陈代谢过程中的稳定同位素分馏作用，研究了在生态系统食物网中的物质与能量转换规律。

The activable enriched isotopes were used as tracers to follow the path of elements.

由于考虑了内源部分与外源部分在机体内的行为，并采用科学方法加以校正，取得了令人满意的结果。

UCR 3476 (ca 7300 to 7600 B.C.). Amino acids and stable isotopes indicate heavy dependence on anadromous fish.

UCR 3476 (约公元前7300－7600)。氨基酸和稳定同位素测定主要依靠鱼卵。

A quantitative correlation between carbon and oxygen isotopes of authigenic carbonates from lake sediments can easily be derived.

用统计方法可以较直接地获得气候要素与湖泊自生碳酸盐碳、氧同位素的定量关系，避开考虑复杂的湖泊物理化学过程，为定量恢复古气候提供了一条便捷途径。

A quantitative correlation between carbon and oxygen isotopes of authigenic carbonates from lake sediments can easily be derived.

总的看该地区季风活动经历了不稳定期-增强-有所减弱但仍活跃-强盛-逐渐萎缩几个变化阶段，这一夏季风的变化规律与大气环流模型预测的结果相似。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。