lethal concentration

Lethal concentration ( LC ): concentration represents an acute poisoning.

致死浓度 ( LC ): 用浓度表示急性中毒的一种尺度.

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Preliminary Test on the Effect of Antibiotic on the Lethal Concentration 50% of Veliger Larva of Chlamys farreri

抗生素对栉孔扇贝面盘幼虫半致死浓度的初步试验

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The median lethal time ( LT_ ( 50)) of P_ ( f) NPV to the larvae was shortened with the increase of the viral concentration.

各测试浓度下致死中时间（LT（50）为3.43-5.14天，随病毒浓度提高而缩短。

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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。

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Pretreatment of low temperature could induce resistance to lethal concentration of H2O2.

低温预处理可以诱导对致死浓度H2O2的抗性。

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Through experiments have found that: when the concentration of heavy metals in the soil is 0.5 percentages, it fits the half lethal dose.

通过实验发现：当土壤中重金属的含量为0.5%时，最符合蚯蚓的半数致死量。

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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。

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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

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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）。

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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。

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The median lethal time ( LT50) of the GV was shortened with the increase of the virus concentration and the decrease of the larval instar, during which the GV was fed.

幼虫饲毒后，致死中时（LT（50））随病毒浓度提高而缩短；随饲毒时虫龄的增大而延长。

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Median lethal time, mean lifespan and mean maximum lifespan of drosophila fed with different concentration of ponceau 4R were lower than those in control groups dominantly ( P < 0.05 or P < 0.01) in survival experiment, and a dose-response relationship was shown.

生存试验中各浓度组雌雄果蝇的半数死亡时间、平均寿命及平均最高寿命均较对照组缩短（P<0.05或P<0.01），且存在剂量-反应关系。

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The lethal concentration is inversely proportional to pH and water hardness.

半致死浓度Lc50与pH和水的硬度成反比。

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Test on Bacteriostatic Lethal Concentration and Time of Bio active Compound Produced by Streptomyces 702

链霉菌702生物活性物质抑菌的致死浓度和致死时间的测定

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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；

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Lethal concentration ( LC50) The water in the lake is comparatively cold and the lake remains frozen half of the time each year.

半致死浓度（LC50）池水温度较低，一年中有半年冰封期。

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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%。

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