查询词典 isotopes

Microfossil assemblages and foraminifer isotopes from the upper part of ODP Hole 807A on the Ontong Java plateau were studied to provide evidence for discussing Late Quaternary productivity variations with glacial cycles in the western equatorial Pacific.

通过研究翁通－爪哇海台ODP 807A孔顶部岩心微体古生物和有孔虫同位素的变化，探讨冰期旋回中赤道西太平洋晚第四纪古生产力的变化。

The ratios of the different isotopes differ depending on where and how an element was formed, and are therefore an important clue to the conditions of the element's formation.

不同同位素的比例不同与元素在何时何地形成的有关，因此这是元素形成环境的重要线索。

This model indicates that the sulfur isotopes, whose values tend to be negative fractionate to a large scale because of the reductive process of dissimilating bacteria of sulfate.

根据内蒙古乌达矿区高硫煤9煤层（有机硫同位素值 d 34 S=－12.3‰~5.8‰，黄铁矿硫同位素值 d 34 S=－18.7‰~1.1‰）和低硫煤13煤层（有机硫同位素值 d 34 S 为8.9‰~ 11.5‰，黄铁矿硫同位素值 d 34 S 为8.3‰~ 9.7‰）剖面上有机硫和黄铁矿硫同位素的组成，结合煤岩学特征的综合分析以及黄铁矿化菌落和蓝藻胶壳的发现，提出了高硫煤中硫的演化模式，认为高硫煤中硫的同位素由于硫酸盐的异化细菌还原作用导致硫同位素大规模分馏，使之趋于负值。

The research status of the stable isotopes in the field of environmental science and the isotope fractionation is revi.

本文介绍了稳定同位素分析方法、稳定同位素分馏的研究现状及其在环境科学研究中的最新应用进展。

In this paper, much energy has been placed on phosphate concretion re search which host in black shales of Dou Shantuo Fm. and Nu Titang Fm、 Research contents include mineralogy, petrology and geochemistry character istics of phosphate concretions. Element distributive characteristics are ana lysed using Synchrotron Radiation techniques. Additionally, sulfur isotopes of francolite and their significance are discussed in this paper. The results are as following

本文开展了晚震旦世陡山沱组以及早寒武世牛蹄塘组两套黑色页岩中磷结核的研究，对产于这两套黑色页岩中磷结核的矿物组成、地球化学等方面开展了研究，首次运用了同步幅射X-荧光探针对结核内元素的分析特征进行了分析，同时还测定了磷的硫同位素并讨论了其意义，所得出的结果简述如下

In the early 1950s American scientists produced the hydrogen bomb by inducing fusion reactions in a mixture of the hydrogen isotopes deuterium and tritium, forming a heavier helium nucleus.

1950年代，美国科学家在氢的同位素氘和氚的混合物中引导聚变反应生成较重的氦原子核，从而制造出了氢弹。

In the early 1950s American scientist s produced the hydrogen bomb by inducing fusion reactions in a mixture of the hydrogen isotopes deuterium and tritium, forming a heavier helium nucleus.

1950年代，美国科学家在氢的同位素氘和氚的混合物中引导聚变反应生成较重的氦原子核，从而制造出了氢弹。

The research on micro-fauna and carbon, oxygen,strontium isotopes and magnetic susceptibility reveals that the signals of globalPaleocene/Eocene boundary event are well recorded in the Gamba region.

本文对剖面各个层位生物群，界线附近的碳、氧、锶稳定同位素以及磁化率进行了研究，研究成果显示，全球界线事件在西藏南部岗巴地区具有明显的影响。

In summary, the current project successfully designs a user-friendly program which is powerful in data analysis in 40Ar/39Ar geochronology and is potentially useful to data analyses of other isotopes in compositional space.

换言之，本研究的方法在解释氩氩定年分析结果更加容易，因此，对於利用同位素分析、探讨历史复杂岩体的研究工作，提供一项有利的解析方法。

This time, it is carbon isotopes that give the game away.

这一次是碳同位素泄露了秘密。

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。