No significant difference of MLT was found between male and female.

In this paper we reported the preparing the Good-Sleep ( MLT) capsule, examining the function of aid sleep, and evaluating safety and toxicology of the product in some aspects.

报道了安梦（褪黑素）胶囊的研制，考察了其助眠功能，并进行了部分安全毒理学评价。

The Toxicological Evaluation on the Substance of the Good-sleep ( MLT) Capsules in Rat

安梦（褪黑素）胶囊安全毒理学评价

Upper incipient lethal temperature of short term thermal shock of two species of copepods ( 2) Initial temperature of catalyst bed is wholly too high.

两种桡足类短期热冲击的高起始致死温度值（2）提高起始反应温度使催化剂床层温度整体过高导致飞温。

The upper lethal temperature of the spat was 40 ℃.

稚贝对低温（5℃至2℃）有很强的忍耐性，致死温度上限是40℃。

It is summarized that the seedling's tolerance of half lethal salt concentration, the seed vigour index, and the seed nitrogen content could be regarded as the physiological index for assessing the level of the seed salt tolerance and whether it be selected for breeding.

初步认为种子耐盐半致死浓度、种子活力指数和含氮量可以作为种子耐盐性评价和选育的生理指标。

The half lethal concentration of 48? h-LC_ ( 50) of 21 nitrobenzenes to Daphnia carinata was determined by use of the standard test method, and the range of toxicity was from 3.49 for nitrobenzene to 5.40 for 1,4-dinitrobenzene.

采用标准实验方法测定了21种硝基苯类化合物对隆线蚤（Daphnia carinata）的48h半致死浓度值，结果lg（1/LC50）的范围在349～540之间；

The phenols content is high and the median lethal temperature is low, then cold resistance is strong in the green up period, fist period of exuberance and withering period.

在高寒植物的返青期、草盛前期和枯黄期，酚类物质含量高，半致死温度低，抗寒性强；

The cold resistance of the 6 spices alpine plants varies with air temperature. The change curve of the median lethal temperature is a single peak.

在整个生育期内，6种高寒植物的抗寒性具有随环境温度变化而改变的特性，它们的半致死温度的呈单峰变化趋势。

In this paper it is reported that the recovery from 6-12 Gy X-ray irradiation-induced potentially lethal damage ( PLD) in plateau-phase V_ ( 79) cells, following incubation for 2-6h postirradiation was observed.

本文报道了612Gy X线照射引起坪台期V（79）细胞潜在致死损伤（PLD），经保温26h后可以得到修复。细胞存活率比可提高到1.52.0。

Through clonal survival, there was radiotherapy enhancement for Glu-GNPs on lung adenocarcinoma cell line A549, and the mechanism may are restrain of repair of sublethal damage, blocking cells at G2/ M and inducing apoptosis.

克隆形成实验表明纳米金对人肺腺癌细胞株A549具有放射增敏作用，初步探讨其机制可能为抑制细胞亚致死损伤的修复阻滞细胞于G2/M期，并诱导细胞凋亡。

The kinetics of repair of sublethal damage was studied on cervical spinal cord in rats after fractionated irradiation.

本文研究了大鼠颈部脊髓分割照射后的亚致死性损伤修复过程。

The extract had higher toxic killing effect on Euproctis bipunctapex larvae. However, the effect was lower. The median lethal concentration ( LC_ ( 50)) for the larvae treated for 72 h was ( 0.03227%).

雷公藤提取物对乌桕毒蛾幼虫具有较高的毒杀作用，但表现比较缓慢，处理72h后的死亡中浓度LC50为0.03227%。

The grades were designed by equal space between logarithm, and the median lethal concentration was computed by Linear Regression.

浓度梯度按等对数间距设置，半致死浓度采用直线内插法进行计算。

Median lethal concentration to human embryo lung fibroblastic cell is about 41.3 μ g/ ml.

引起半数人胚肺成纤维细胞生长抑制的浓度为41.3μg/ml。

The median lethal concentration data is reliable for future biological observation.

为今后的生物监测提供可靠的半致死浓度的数据。

Determination of median lethal concentration of seven kinds of medicines against Boophilus microplus

七种药物对微小牛蜱的半数致死浓度测定

Methods Immersion method of pesticide was used to assay the medium lethal concentration ( LC_ 50) of the fourth-instar larvae.

方法采用浸渍法，测定Ⅳ龄期幼虫的半数致死浓度（LC50）。

Dominant Lethal Mutation Test of Organic Sulfur

有机硫农药毒性试验显性致死突变试验

In this paper a close relationship among the activity of ADP-ribose transf-erase ( ADPRT), rejoining of DNA single strand breaks ( SSB) and potentially lethal damage repair ( PLDR) in mouse tumor cells has been demonstrated.

本文探讨了ADP&核糖基转移酶（ADPRT）的活性、DNA单链断裂（SSB）重接和细胞潜在致死质损伤修复（PLDR）三者的关系。

However, wether repairing of damaged telomeres is a mechanism of potentially lethal damage repair has not been clarified until now, and little is understood about the mechanism of telomerase performing repairing at damaged telomeres and modifying apoptosis.

目前对端粒损伤修复是否是潜在致死性损伤修复中重要的机制还未见有学者明确提出，对端粒酶如何参与端粒损伤的修复及凋亡的调控机制了解还很少。