查询词典 radioactivity

Radioactivity came to light a century after the discovery of uranium when Henri Becquerel used uranium salts and photographic plates in the same experiment and found that one fogged the other.

放射性是铀发现一百年之后才被贝克勒尔发现，他在同一个试验中使用了铀盐和显像版，结果发现前者是后者变得模糊。

Radioactivity came to light a century after the discovery of uranium when Henri Becquerel used uranium salts and photographic plates in the same experiment and found that one fogged the other .

在发现铀一百年之后，亨利·贝克勒尔在一实验中同时使用了铀盐和照相底片，发现两者会相互遮盖，从而使放射现象亮相于世。

In the International System of Units, the unit of radioactivity becquerel Harrell, called becquerels, symbol Bq, 1Bq equal to 1 second of radionuclides in the nucleus occurred within a decay, that decay 1Bq = 1 times / sec .

在国际单位制中，放射性活度的单位为贝可勒尔，简称贝可，符号为Bq，1Bq等于放射性核素在1秒钟内有1个原子核发生衰变，即1Bq=1次衰变/秒。

You must be carful about the radioactivity material .

你们使用这些放射性物质的时候一定要非常小心。

At 24 and 48 h after ［3H］tricyclopinate, both total and binding radioactivity were still seen in caudate putamen.

24和48 h，总放射性和结合放射性在脑的尾壳核仍有弱的影像显示。

Results: The radioactivity in organs in ANP group was higher than other groups'in experiment 1; In experiment 2, the results of cultures of chyle fluid, pancreas, lymph node from the experimental group were positive, whereas the results of cultures of all organs in ANP group were positive.

结果：实验一结果表明ANP组中各脏器的放射活性明显高于其它组；实验二组中实验组乳糜液、胰腺、淋巴结细菌培养阳性，而ANP组中各脏器细菌培养均阳性。

A kind of in-situ measurement method is introduced in this paper, by which the radioactivity in the clayey sand of ground surface contaminated by radioactive particulates can be investigated.

本文简要介绍一种对放射性微粒污染的地表砂土中放射性核素活度的就地测量方法。

Synthetic vanillin is prepared from coal tar, which has no radioactivity.

合成的香兰素是通过处理煤焦油而得来的，是没有放射性的。

It was quite a shock when 400 square metres of the site was found to be contaminated by radioactivity.

令人感到震惊的是，有400平方米的场地受到辐射污染。

This paper describes the principle and application of correlation method in the absolute radioactivity measurement .

本文介绍用于放射性核素活度绝对测量的相关方法的基本原理、应用及其优点。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。