查询词典 radioactive

Radioisotope means the nuclide in a certain element with radioactive decay, which has the same ordinal number of atoms but different mass.

放射性同位素，是指某种发生放射性衰变的元素中具有相同原子序数但质量不同的核素。

A radioactive decay series; the paraffin alkane series.

放射性蜕变的系列；链烷烃系列。

But the translocation's speed of radioactive substance in phloem of two kinds of plants were similar.

但在木质部内的转运速度较在韧皮部内快。

The results of experiments showed that the radioactive substance could be translocated in xylem and phloem of two kinds of plants.

花生和大豆的根和叶对甲基异柳磷都有一定的吸收能力。

We summarize the study of geochemistry of the Co rich crust, and explain the diffusion of elements in the Co rich crust and the exchange with ambient seawater. Besides, we discuss the effect of phosphatization and substrate rocks on the composition of the Co rich crust. We also introduce the application of stable isotopes (including the stable isotopes of Pb, Nd, and Hf), radioactive...

概述了富钴结壳地球化学的研究成果阐述了富钴结壳中元素的扩散及与周围海水的交换，基岩和磷酸盐化事件对富钴结壳组成的影响分别介绍了稳定同位素(Pb、Nd和Hf的稳定同位素)、放射性同位素(Be、U和Th的放射性同位素)及元素(常量和微量元素、稀土元素)在富钴结壳古海洋学研究上的应用。

By using radioactive ligand receptor binding assay and observing animal activities, this paper reports the effects of convulsants of picrotoxin, penicillin and kainic acid on the 3H GABA A binding in the cerebral cortex, hippocampus and cerebellum of mice.

采用放射配体受体结合分析法和动物行为观察，研究了致惊药印防己毒素(picrotoxin ，Pic)、青霉素(Penicillin ，PG)、红藻氨酸(kainicacid ，KA)对小白鼠大脑皮层、海马、小脑三脑区3 H GABA与GABAA 受体结合的影响。

Then she found that pitchblende was more radioactive than uranium by itself.

玛丽注意到钍元素也是具有放射性的。

In reality the proportion of the hypothetical element was far lower and it took several years to show unequivocally that pitchblende contains at least one highly-radioactive material which is a new element in the sense that chemistry attaches to the term.

实际上这种假设中的元素的浓度要小得多，我们花了几年时间才明确无误地证明沥青铀矿物质中至少含有一种高放射性物质，在化学意义上这就是一种新元素。

We found that pitchblende contains at least two radioactive materials, one of which, accompanying bismuth, has been given the name polonium , while the other, paired with barium, has been called radium.

我们发现沥青铀矿物中至少含有两种放射性物质：与铋伴生的命名为钋，与钡伴生的命名为镭。

In July 1898, Madame Curie and her husband got a great success that they discovered the radioactive element, polonium.

1898年7月，居里夫人和她的丈夫获得了很大的成功—他们发现了放射性元素钋。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。