n.半衰期(半衰變周期；半排出期)

The halflife of literature and core periodicales are approached as well. 對文獻(xiàn)半衰期和核心期刊等作了探討。

It is not necessary to wait until half of a sample has decayed in order to measure the halflife. 不必一直等到樣品衰變一半之后才測量它的半衰期。

The elimination rate constant ( K e) of LCT ARF group was significantly less than that of LCT normal group,while the halflife period (t 1/2 ) of it was longer. LCT在腎衰組中的清除速率常數(shù)（Ke）明顯小于正常組，半衰期（t1/2）則明顯大于正常組。

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. 采用標(biāo)準(zhǔn)測試方法測定了20種化合物在自然江水(松花江)中的生化需氧量(BOD)隨時間的變化

radioisotope biological halflife 放射性同位素生物半衰期

[This message has been edited by halflife (edited 21 January 2002). 但是這里好象很少有人玩.