A comparative study on categorizing schemes for carcinogenic activity of chemicals

Polycyclic aromatic hydrocarbons ( PAHs), a kind of POPs are ubiquitous in air, contributing more than 1/ 3 of the total carcinogenic chemicals, with the source of oil-leak, traffic emissions, environmental tobacco smoke, fuel-burning, cooking oil-fumes, and, so on.

多环芳烃（PAHs）是大气中广泛存在的一类持久性有机污染物，占自然界中致癌物质总量1/3以上，主要来源有石油泄漏、汽车尾气、环境烟草烟雾、燃料燃烧及烹调油烟等。

The carcinogenic chemicals sample are coded with structure'node by KLN methods on computer, and then broken up. The substructures of the chemicals the machine can recognize are gotten.

利用计算机将致癌化合物样本按KLN方法作结构结点编码、分解，获得机器可识别的化合物结构片段。

Sewage discharge and emission of exhaust gas might be the main way for transportation carcinogenic chemicals, especially for environmental endocrine disrupting chemicals ( EDCs) to pollute environment.

废水和废气排放可能是导致内分泌相关肿瘤发生的原因之一，尤其是环境内分泌干扰物（EDCs）污染外环境的主要途径。

EU agriculture ministers last week agreed changes to the pesticide authorisation system that would effectively ban the use of carcinogenic chemicals and substances that damage human hormones or the reproductive system.

欧盟各国农业部长上周同意调整农药审批体系，这些调整实际上将禁止使用致癌化学品和危害人体激素或生殖系统的物质。

The results are consistent with the contention that there is a relationship between carcinogenic chemicals and particular alterations in the activities of cytochrome P-448.

本文结果表明，细胞色素P-448活性的诱导与化学物的致癌潜力有关。

Scientists suspect that alcohol interferes with the body's ability to convert carcinogenic chemicals in smoke into more benign substances that it can eliminate.

科学家们怀疑酒妨碍了身体将烟中的致癌化学物质转化成毒性较弱的物质并加以清除的能力。

We are manufacturer and exporter of essential oils and aromatic chemicals, which are produced by our factories located at places in China with rich natural resources and raw materials.

立颖国际有限公司以经营各类天然香料油、成香料及精细化工原料为主。

Attraction of Binary Blends of Some Aromatic Chemicals for Piophila casei Adults

二元芳香族化合物对酪蝇成虫的引诱效果

Importer Exporter in Industrial Chemicals, Aromatic Chemicals Native Produces.

工业化工，香料化工和土产出入口商。

Study on the oral LD_ ( 50) prediction model of aromatic chemicals in rats

芳香族化合物大鼠经口LD（50）预测模型的研究

In this dangerous job, workers are put in long hours surrounded by heavy machinery and toxic chemicals.

从事这个行业的工人长时间被重型机器和有毒化学品包围。

Development of new production routes for petro-chemicals from heavy oil; Automobile Chemicals

发展重油为原料的石油化工新路线；汽车配套用主要化工产品

In some areas, serious pollution are found by heavy metals and chemicals because of poor manual dismantling and recovery technology in family workshops. As results, e-waste has caused serious harm to the enviroment and human health.

家庭小作坊式的手工拆解和落后的回收技术造成了严重的地区性重金属和化学物质污染，对我国的环境及居民身体健康造成严重的危害。

Like average amphibians, with its naked skin of no protection by leather and fur, the tree frog is very sensitive to environment pollution by heavy metal, chemicals and acid rain.

树蛙和一般两栖类一样，皮肤裸出，没有毛皮的保护，所以对生活环境中重金属、农药与酸雨等污染十分敏感。

Particles of carbon produced when fossil fuels are burned can lead to similar problems but they are also coated with toxic heavy metals, chemicals and volatile organic compounds.

燃烧化石燃料时产生的碳微粒可能导致类似问题，但它们外表还包裹着有毒的重金属、化学物质和挥发性有机物。

Research on constructing Shanxi base of energy and heavy chemicals

山西能源重化工基地建设研究

The farmers shouldn't use so heavy chemicals in their products.

农民们在庄稼上不应使用大量的化学药品。

From the viewpoints of technical development, process flow path and use in coal chemicals, an introduction is given to the technology of shell pulverized coal gasification under pressure and that of the new GSP process.

从技术开发、工艺流程、煤化工上的应用等方面对Shell粉煤加压气化技术和新型气流床粉煤加压气化技术加以介绍。

The work of the paper is as follows: ( 1) Non-linear characters of the coal chemicals price time series can be determined according to BDS methods.

工作内容主要有三方面：（1）根据BDS检验方法确定煤化工产品的甲醇价格时间序列的非线性性质。

With growth of coal chemicals and natural gas chemicals, methanol output in China will rise greatly and development of products from methanol become imminent.

随着煤化工和天然气化工的发展，我国甲醇产量将有较大幅度的增长，甲醇下游产品的开发迫在眉睫。