致癌物质

Therefore,it is necessary to develop new routes to prepare anion exchange membranes without such chloromethylation process.As for cation exchange membranes, mostly-perfluorinated sulfonic acid ionomers,such as Nafion~ series,have been wildly used due to their high proton conductivity and substantial durability.

对于强碱性的阴离子交换膜的制备，由于传统路线中的卤甲基化步骤中不可避免的采用强致癌物质二氯甲醚，因此无论是从经济成本还是环境保护方面，开发不采用氯甲基化步骤的阴离子交换膜制备方法是目前的一个迫切要求。

With regard to anion exchange membranes,the traditional preparation method involves a much complicated process—chloromethylation,in which the commonly used chloromethyl methyl ether and bis-chloromethylether are now considered carcinogens.Therefore,it is necessary to develop new routes to prepare anion exchange membranes without such chloromethylation process.As for cation exchange membranes, mostly-perfluorinated sulfonic acid ionomers,such as Nafion~?

对于强碱性的阴离子交换膜的制备，由于传统路线中的卤甲基化步骤中不可避免的采用强致癌物质二氯甲醚，因此无论是从经济成本还是环境保护方面，开发不采用氯甲基化步骤的阴离子交换膜制备方法是目前的一个迫切要求。

The journal publishes original research on the evaluation and characterization of teratogens, carcinogens, or mutagens; reports describing the development of novel experimental techniques for toxicological assessment, or the application of current methods in molecular and cellular biology (including in vitro studies, organ and cell culture, and the use of transgenic animals); as well as critical reviews focused on topics of significant interest to specialists in teratology, cancer biology, and mutation research.

杂志刊有关载致畸剂，致癌物质和诱变剂的评估和特征方面的原始研究；描述毒物评定的实验新技术，或当前方法在分子和细胞生物学（包括体外研究，器官和细胞培养，和转基因动物）中应用的报告；以及对畸形学，癌生物学，和突变研究中生物学家非常感兴趣课题的评论。

In conclusion, tobacco specific carcinogen, NNK, enhanced colon cancer metastasis through α7-nAChR and E-cadherin — one of the hallmarks of epithelial mesenchymal transition — and its transcription repressors, Snail and ZEB1. Besides, the nicotine also enhanced the colon cancer cell migration through non-E-cadherin pathway.

从我们的实验得知菸草中的致癌物质NNK能透过结肠癌细胞上的α7尼古丁受器而改变E-cadherin转录及其转录抑制因子(Snail和ZEB1)的表现量来增加结肠癌细胞的转移能力，而尼古丁则是透过E-cadherin以外的途径来促进结肠癌细胞转移。

Insulin is not an oncogenic agent, but it is a growth-promoting agent.

胰岛素本身并不是一种致癌物质，但的确是一种促生长剂。

Methods: Pedigree survey, chromosome analysis detection of radiation and oncogenic substances were adopted.

对报告的高发癌家系采用家系调查分析、染色体分析和生活环境的放射线检测和致癌物质的检测等方法进行调查。

People take it for granted that boiled tap water is clean, but do not know that it contains deadly oncogenic substance.

人们以为煮沸的自来水是洁净的，却不知里面仍含有可怕的致癌物质

And between the temperature and the amount of time that it takes to cook, these carcinogens form.

这些致癌物质与加热的温度和烹调的时间有着密切关系，温度越高，生成的致癌物就越多。

Carcinogens in tobacco are about 30 species.

烟草中的致癌物质约有30种。

It also binds carcinogens in the colon, which helps protect the body from certain types of cancer.

它还能与结肠结合，这有助于防止某些类型的癌症人体致癌物质。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。