查询词典 toxicity

Results There was a dose-response relationship between concentration of ponceau 4R and mortality rate of drosophila in acute toxicity test.

结果急性毒性试验中，胭脂红浓度与雌雄果蝇的死亡率呈剂量-反应关系。

Methods Ponceau 4R was administrated orally to different groups of Drosophila melanogaster, Median lethal dose （LC50） was estimated by acute toxicity test; lifespan was tested by drosophila survival experiment; superoxide dismutase and maleic diadehyde were evaluated at different periods.

方法经口喂饲果蝇不同浓度胭脂红，通过急性毒性试验测定胭脂红半数致死浓度（median lethal dose，LC50），采用生存试验检测果蝇寿命，测定不同时间果蝇体内总超氧化物歧化酶（superoxide dismutase，SOD）活性及丙二醛（maleic dialdehyde，MDA）含量。

Acute toxicity testing method was used to study effects of different density of Prorocentrum donghaiense,Heterosigma akashiwo and Alexandrium tamarense on mortality rates and population growth parameter of Brachionus plicatilis under controlled experimental conditions.

应用急性毒性试验方法，研究了可控生态条件下不同密度的东海原甲藻、赤潮异弯藻和塔玛亚历山大藻对褶皱臂尾轮虫的致死率和种群增长参数的影响。

The neurotoxin tetrodotoxin, its toxicity nearly one thousand times higher than potassium cyanide.

河豚毒素为神经毒素，其毒性比氰化钾要高近千倍。

The results showed that a highly significant increase in DNA migration in DNA-damaged lymphocytes was induced by three different concentrations of yttrium and praseodymium compared with the control,The percentage of DNA-damaged have genetic toxicity.

结果表明，与对照相比，3种不同浓度的氯化钇和氯化镨均可引起淋巴细胞DNA受损后DNA迁移率的显著升高，受损伤细胞的百分率与对照差异明显，提示氯化钇和氯化镨具有一定的遗传毒性。

More than 50 chemical substances were prelim inarily tested their efficiency to enhance the toxicity of Bacillus thuringiensis against Heliothis armgera.Experiments of bolting synergists and killing insects were conducted in laboratory.

本试验测定了50种化合物包括各种盐类、有机酸、氨基酸和阿维菌素(25ug/ml)等，在添加浓度为0.1％、0.5％和1.0％的剂量下对苏云金杆菌标准品的增效作用。

Objective:To study the toxicity and efficacy of pork preservative.

目的 ：研究猪肉保鲜剂的毒性及保鲜效果。

It might be a perfect model to study the cellular toxicity of prion protein.

利用106-126肽段感染分化的PC12细胞可能是在细胞水平上研究朊蛋白毒性作用的理想模型。

The tolerance of seawater fish Japanese sea bass and black rockf ishto pH and alkalinity is studied through the experiment of acute toxicity. The median lethal concentration values are obtained by the method of probability unit. The safe concentrations of alkalinity, C032- and HC03- are obtained. The signification of pH and alkalinity is estimated with analysis of variance.

本文应用急性毒性试验方法研究了海水鱼类鲈鱼黑鲪对pH、碱度、二氧化碳体系各分量的耐受性，应用概率单位法求得半致死浓度，并得到了碱度、碳酸根、碳酸氢根等的安全浓度，应用方差分析评价了pH和碱度致毒作用的显著性，探讨了不同pH、碱度范围的主要致死因子。

The evaluation of the joint toxicity of Cd and Zn was carried out based on the principle of the additive index of aquatic toxicological effects, and LC50 was obtained with the SPSS 11.5 software package by probit analysis of the bioassay.

在此基础上，根据水生毒理联合效应指数相加法原理，利用生物测定计数型机值分析得到毒性单位浓度LC50值进行判断。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。