半衰期

The investigators did not observe any statistically significant differences between the two groups after 24 hours, however. This included measures of pain as well as length of hospital stay and the range of motion of the knee joint."This makes sense, because the half-life of ropivacaine is 18 hours," Dr. Shore said.

在术后24小时，两组在许多项目上，并未显示明显差异；这些项目，含疼痛程度、住院期，及膝部的活动范围等；Shore医师表示，这是合理的，因为ropivacaine的半衰期为18小时。

The results showed that the half-lives of chlorothalonil and thiram in mushroom were 2.5 days and 4.2 hours, respectively, at double of the recommended dosage.

田间残留动态试验结果表明，百菌清和福美双在蘑菇中的半衰期分别为2.5d 和4.2h。

The results showed that,the synergistic effect to the degradation of methyl orange by Fenton synergized with nanometer TiO2 was observed.

在实验浓度范围内，甲基橙的降解反应符合准一级动力学过程；与Fenton反应相比，在0.2、0.4、0.6g/L纳米TiO2的协同作用下，甲基橙的降解表现反应常数分别提高了1.71、2.51和3.36倍，半衰期相应缩短。

The α-decay lifetimes of the newly synthesized superheavy element s are calculated using the α-cluster model and the results are in good agreement with experimental data.

用α 结团模型计算新合成超重元素的半衰期，与已知的实验数据进行对比分析，发现理论和实验数据能够很好地符合，验证了α结团模型对超重核研究的有效性。

Results The activity, recovery rate of activity and half-life of immobilized SOD were 333 U/g, 86.32% and 43.8 d respectively. After storage at room temperature for 5 d, the relative activity of SOD was still more than 80%. The optimal reaction temperature of immobilized SOD was 45℃, and the activity retentions after being used for the first and second times were 70.12% and 51.72% respectively. Both the optimal pH values for SOD before and after immobilization were 6, while the Km values were 0.16 and 0.18 mmol/L respectively.

结果 固定化超氧化物歧化酶活力为333U/g，酶活回收率为86.32%，半衰期为43.8d；固定化酶室温保存5d后，相对酶活力仍保持在80%以上，最适反应温度为45℃，使用一次后回收率为70.12%，重复使用两次后回收率为51.72%；固定化酶与溶液酶在pH6时活性最强，Km分别为0.18mmol/L和0.16mmol/L。

This rate of metabolism combined with the polyphasic nature of the process complicates estimation of a biological half-life for melatonin.

这一代谢速率结合多相性质复杂的过程可以用来估计褪黑素的生物半衰期。

It already confirmed that paraquat is a stable compound, it has long biological half-life in the soil, and can easily absorbed by organism.

而且证明百草枯是高稳定性物质，在土壤中的半衰期很长，容易被土壤中的有机物和粘土吸附。

No, Chloral Hydrate has a half-life of only 4 hours in people with a high tolerance.

不是，对&水合三氯乙醛&有较高耐药能力的人，它的半衰期仅为4个小时。

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。