halflife

Bioavailability is better after subcutaneous administration and a longer halflife allows a single daily injection .

生物利用度好后皮下给药和更长的半衰期允许一个单一的每日注射。

It is not necessary to wait until half of a sample has decayed in order to measure the halflife .

不必一直等到样品衰变一半之后才测量它的半衰期。

I even had to buy a new halflife .

我甚至不得不买新的半条命。

The shifts of halflife are compared for internal conversion with different nuclear decay energy and different type of transitions .

比较了由于不同的跃迁能量和跃迁类型对内转换过程的半衰期的影响，并将计算的理论值与一些实验测量值进行了比对。

The halflife of ￣( 79 ) Se is obtained to be ( 4.8 ± 0.4 )× 10 ￣ 5a .

得到的￣（79）Se的半衰期为（4.8±0.4×10￣5a。）

This method only needs the characteristic data ( t m and Φ m ) of one thermoanalytical curve and conveniently calculates the halflife times and the rate constants of studied reaction systems .

该法只需要特征时间参量tm及相应的热谱数据便可方便地计算化学反应的半寿期和速率常数。

In addition , the fusion protein also could exactly solve the problem that small molecular peptides or proteins are easily degradated due to their short halflife . Moreover , it also may increased the gene production .

除此之外，融合蛋白的构建也正好可以解决小分子多肽或蛋白因半衰期较短而容易降解的问题，还可增加基因产物。

The halflife periods of biodegradation of 20 organic pollutants in the Songhuajiang River were obtained through determination of the variation of the biochemical oxygen demand ( BOD ) with time with the standard test method .

采用标准测试方法测定了20种化合物在自然江水（松花江）中的生化需氧量（BOD）随时间的变化，得到了生物降解半衰期。

Under nitrogen-fixing condition , the halflife of the activity of nitrogenase was shorter then 4h , Whereas that of glutamine synthetase was longer than 10h . This suggests that glutamine synthetase may not be a positive regulator of nitrogenase .

在氮固定条件下，固氮酶活力半衰期小于4小时，GS活力半衰期大于10小时，则GS并不是固氮酶的正调节因子。