查询词典 half life

The radioactive isotope iodine-131, with an eight-day half-life, is very useful in medicine and other applications

放射性同位素碘－131的半衰期为8天，在医学和其它应用中都很有用。

The comparison result of the decay rate and the half-life verified the correctness and feasibility of the optics evaluating method.

利用泡沫衰变速度与宏观出液半衰期对比分析结果，验证了光学评价方法的正确性和可行性。

Nuclear Run-on Assay was used to address the contribution of transcriptioninitiation to the regulation of five histones by YSV. Actinomycin D inhibitor studies were used to detect the mRNA half-life of five histones. SLBP weremeasured by Western blot assay to identify regulation of YSV on Pre-mRNAsplicing.

应用Nuclear Run-on Assay观察YSV对人肝癌BEL-7402细胞的五种组蛋白转录效率的影响；应用放线菌素D转录抑制法观察YSV对组蛋白mRNA半衰期的影响；应用Western blot检测SLBP的表达水平观察YSV对组蛋白mRNA加工的影响。

So in fact, if they senesce just a tiny tiny bit over time -- that is, if their half-life gets shorter, very very slowly -- we wouldn't actually be able to tell that this was happening in the time that we took our measurements, because the acceleration in the rate of atoms decaying (relative, of course, to the number that had not decayed already, which is always decreasing) would be too tiny to be statistically detectable.

所以在事实上，如果它们随时间衰老得只那么一点点，—就是说，如果它们的半衰期缩短得非常慢—那么我们实际上不可能知道，在我们测量期间发生过衰减，因为原子衰减的速率加速得太小，统计学上检测不出（当然，是相对于不曾衰减的数目而言，不曾衰减的原子数目总是在减少）。

Objective: To determine the numerical value of light dense of sodium salicylate by colorimetric analysis, and calculate its plasma half life.

目的：用比色法测定水杨酸钠的光密度值，并计算血浆半衰期。

Right now, Portal , Team Fortress 2 and Half-Life 2: Episode 2 can only be purchased as part of the stupendously good The Orange Box, for Xbox 360, PS3 and ...

现在， 门户，团队要塞2和半条命2 ：第二辑，只能购买部分的stupendously良好的橙色方块中，为Xbox 360 ， PS3和。。。

Moreover, sulfamethazine was observed hardly degrading in coil, with a half life of 223.9d and 102.4d in sterilized and unsterilized soil respectively.

表明磺胺二甲嘧啶是一种在土壤中不易被降解、容易迁移和渗漏到水体、对土壤微生物和水体产生危害的新型污染源。

Human tissue-type plasminogen activator is a medicine used in thrombolytic treatment efficiently. Its application was limited by its defects, such as short half life and leading to blood in skull.

人组织型纤溶酶原激活剂是一种高效特异的溶血栓药物，但天然的t-PA存在半衰期短，有潜在的引起颅内出血的危险等缺点，因而限制了它的广泛应用。

Changed fast by a society and shortened knowledge half-life in the 21st century, in the face of such a society , make us to have to change one's own study way－individual learning turned to team learning.

二十一世纪是一个社会快速变迁，知识半衰期缩短的一个世纪，面对这样的社会，迫使我们不得不改变自己的学习方式－由个人学习转向团队学习。

Pyrethroid ; Initial pollution degree ; Vegetable ; Half life ; Pollution index

拟除虫菊酯；农药起始污染程度；蔬菜；半衰期；污染指数

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。