毒性

The structure-toxicity relationship of 59 substituted benzenes was studied by the method of bayesian regularization neural network,and a QSAR model was built for environmental toxicity evaluation and prediction of substituted benzenes with lipid-water partition coefficient and four quantum indices.

利用贝叶斯规整化神经网络研究了59种苯取代的环境毒性和分子结构的关系。建立了基于脂水分配系数和4种量子指数的QSAR环境毒性预测模型。结果表明：该模型的预测性能超过偏最小二乘法和逐步线性回归方法，残差分析显示其稳定可靠，有望成为一种良好的苯取代物毒性的环境评价和预测的方法

But methoxychlor also has female reproductive toxicity,mainly affecting ovary,uterus,nidation of ovum of pregnant rats,which is an important aspect of ...

甲氧滴滴涕对雌性生殖系统的卵巢、子宫以及受精卵植入同样具有毒性作用，其是内分泌干扰毒性的重要方面，对阐明环境毒物导致的雌性生殖毒性及防治有重要意义。

To observ the toxicity of infected mice and establish mice reproductive toxicity model;②To observe the infected BALB/c female mice ovulation quantums and ovum chromosome;③To observe the oestrogenic hormone( FSH, LH, E2 )level of infected BALB/c female mice;④To observe zygote developmental condition before nidation;⑤To observe embryonic development condition of infected mid-gravidity mice to research the reproductive toxicity and development toxicity of toxoplasma gondii to the BALB/c female mice.

目的： 本实验采用弓形虫感染BALB/c雌鼠，①观察染虫雌鼠的毒性反应，建立生殖毒性的小鼠模型；②染虫雌鼠排卵情况及卵母细胞染色体的变化；③染虫雌鼠性激素(FSH、LH、E2)水平的变化；④着床前受精卵的发育情况；⑤孕中期鼠染虫后胚胎的发育情况，探讨弓形虫对雌鼠生殖功能及胚胎发育的毒性作用。

Toxicity characterisation procedures indicated that the primary toxicants in the effluent were volatile,and could be reduced by sodium thiosulfate. Toxicity based fractionation techniques were conducted,and the oxidation organic chloridates were found not to be the major toxicants.

结果表明，废水对大型蚤具有急性毒性，曝气可去除废水的部分毒性，硫代硫酸钠的投加可去除废水毒性，同时用DPD试剂盒比色法可测出游离态氯气和一价氧化态氯化物。

The reproductive toxicity of Aroclor 1254 on the oogenesis, the fertilization and preimplantion embryonic in vivo in female mice, the spermatogenesis toxicity, the sperma fertilizing ability and the zygote developmental toxicity in vivo in male mice were studied, and the toxicity mechanism were discussed by histopathological examination of the ovary, the uterus, the testis and epididymides.

以小鼠为动物模型，研究了类二噁英多氯联苯的典型代表物质——Aroclor 1254对母鼠卵子发生、受精和附植前胚胎体内发育毒性，公鼠精子发生毒性，以及对精子受精能力和受精卵体内发育的毒性。

Learning and memory function is very complicated and subtile nervous activity, as importance contents of evaluation CNS function, from the effect of learning and memory to explore the damage and mechanism, objective evaluation toxicity efficacy and deep elucidated the toxicity mechanism, it is scientific and practically.

从对学习记忆功能影响的角度探讨MTBE对中枢神经系统的损伤及其机制，可以深入的了解MTBE对CNS的毒性机理，客观评价其毒性作用，为有效预防MTBE神经毒性作用提供科学依据。

DON causes feed refusal, emesis, immunosuppression or immunostimulation, teratogeny, cytotoxicity, reproductive toxicity and human cancers.

脱氧雪腐镰刀菌烯醇不仅可以导致动物产生急性毒性、生殖毒性、免疫毒性，而且与人的癌症相关。

The regression analysis was adopted to study the relativity between dt, ad and the toxicity of ra.results ra decocted liquids could decrease voix pedis tumefaction of bizheng model animals, but had no effect on the growth and development and hematopoietic system of model animals.

将结果进行多元回归分析，得出川乌煎煮时间、剂量与毒性的相关性。结果川乌水煎液能抑制痹证动物的足跖肿胀；对模型动物的生长发育无明显影响；对其造血系统无明显毒性；对其肝脏、肾脏、心脏有一定毒性。

Fluoride ions caused widespread endemic fluorosis in humans, but little attention was paid to the effect of fluoride ions on aquatic organisms. Semi-static acute toxicity trial on larval Siberian sturgeon Acipenser baeri was carried out to explore the safe criteria of fluoride to fish.

为检测氟对鱼类的生态毒性效应，在水温（17±1）℃的条件下，采用半静态式生物毒性试验方法研究了氟离子对西伯利亚鲟初孵仔鱼的急性毒性效应（氟离子浓度梯度设置为0、100、200、300、400、500、600mg·L-1）。

The results showed that the toxicity of brofluthrinate to birds, bees and earthworms is low, to fish is medium, and to Daphnia, alga, silkworms is high.

结果表明：其对鸟类、蜜蜂和蚯蚓的毒性较低；对鱼类属中等毒性；对B045类、藻类和家蚕属高毒性。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。