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- And the values of 48 h median lethal concentration ( LC 50 ) and safe concentration ( SC ) of methamidophos for European eel larvae were 35.9 mg/L and 3.6 mg/L respectively. 甲胺磷乳剂对欧洲鳗仔鳗的半致死浓度（48h－LC50）为35.;9mg/L，安全浓度（SC）为3
- At the treatment of the sublethal dosage and median lethal concentration, the comparison between the life of female and male adult and the ck was non significant or they could be prolonged. 结果显示：高浓度下，寿命缩短；
- median lethal concentration ( LD50 ) 半致死浓度
- median lethal concentration (LC50) LC50
- median lethal concentration(LC50) 半致死浓度（LC50）
- Keywords Copper irons;Stentor Polymorphrus;Median lethal concentration; 铜离子;多态喇叭虫;半致死浓度;
- 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
- Keywords Lake Taihu;Microcystis;cladoceran;median lethal time;median lethal concentration; 太湖;微囊藻;枝角类;半致死时间;半致死浓度;
- Keywords Phascolosoma esculenta;median lethal concentration（LD50）;Cd;Hg;As;acute toxicity; 可口革囊星虫;半致死浓度;镉;汞;砷;急性毒性;
- Keywords steelmaking slag;acute toxic;median lethal concentration（LC50）;safe concentration; 转炉钢渣;急性毒性;半致死浓度（LC50）;安全浓度;
- Keywords Millettia pachycarpa;Extract;Basiprionota bisignsata;Toxicity;Median Lethal Concentration（LC_（50））; 厚果鸡血藤;提取物;二斑波缘龟甲;毒力;LC_（50）;
- Keywords tetrachloroethylene（PCE）;grass carp（Ctenopharyngodon idellus）;acute toxicity;median lethal concentration（LC50）; 四氯乙烯;草鱼;急性毒性;半数致死浓度（LC50）;
- median lethal concentration 致死中浓度
- Using Octanol-Water Partition Coefficient to Estimate Median Lethal Concentrations for Fish Due to Narcosis 用辛醇水分配系数测定鱼因麻醉的中长致死浓度
- A SAS program to calculate median lethal dosage (LD_(50)) of pesticides, named LD50-SAS, was developed based on the algorithms established by Bliss. 基于Bliss概率单位法,编写了用于计算半数致死量(LD50)的SAS程序(LD50-SAS)。
- The virulence of both mutants, as represented by median lethal dose (LD50), was not significantly different from that of the parental strain. 因此，细胞溶解毒素可能不是主要的致死因子，也不是创伤弧菌造成细胞毒杀作用的唯一因素。
- The median lethal dose(LC50)of 4kinds of heavy metals to S.henanense were decreased with the prolonging of the treating time. 4种重金属对河南华溪蟹的半致死剂量（LC50）随处理时间的延长而减小。
- By the changes of chlorophyll content, the lethal concentration of Hg to Egeria najas was 0.10-2.00mg/L. 处理48h以后，Hg~(2+)浓度人于1.;00mg/L实验组中的叶片褪绿严重而且叶片相互粘连，叶片叶绿素含量明显低于对照组，从中可以粗略看出Hg(2-)对细叶蜈蚣草的致死浓度为0
- METHOD:We detected median lethal dose(LD 50 )of mixture of scopolamine (SCO) and chlorpromazine(CPZ) in the different dose to mice and rats by Bliss and Brownlee sequential trial. 方法：用Blis法和Brownle序贯法分别测定不同比例东莨菪碱与氯丙嗪组合成不同比例东氯合剂后对小鼠、大鼠的半数致死量（LD50）。
- By the changes of the activity of SOD and CAT, the lethal concentration of Hg to Egeria najas was 0.10-1.00mg/L. 以SOD和CAT活性变化为根据，可以推断Hg~(2+)对细叶蜈蚣草的致死浓度为0.;10-1
