砷

Key words: occupational and environmental health; sodium arsenite; liver and brain; oxidation/antioxidation

关键 词：劳动卫生与环境卫生学；亚砷酸钠；肝脑；氧化/抗氧化

Sodium arsenite could obviously inhibit the proliferation of BGC823 cells:induce cell cycle arrest and apoptosis and necrosis of the cells.

亚砷酸钠对BGC823细胞的生长有明显的抑制作用，并可诱导细胞周期阻滞及细胞凋亡和坏死，其机制可能与其抑制ROS的清除，上调Caspase3蛋白的表达有关。

Based on the inhibition of arsenite to the acetylcholinesterase , we developed a flow injection assay for the determination of arsenic in drinking water.

通过在样品溶液中加入2-PAM和EDTA以屏蔽有机磷类毒剂及重金属阳离子的影响，实现了对饮用水中亚砷酸根的特异性检测。

The electrolyte was purified by copper arsenite to effectively remove Sb and Bi impurities in the copper electrolyte .

为有效脱除铜电解液中的Sb、Bi等杂质，采用亚砷酸铜净化电解液。

The contamination of water by arsenic might result from oxidation of arsenopyrite.

毒砂氧化溶解和释放的砷将对周围水体造成污染。

Is found mainly in the form of arsenopyrite and As-containing pyrite.

矿石中有害元素砷主要以毒砂和含砷黄铁矿的矿物形式存在。

We draw a conclusion, the iron existed with the form of limonite , the phosphor existed with the form of collophane, the arsenic existed with the form of arsenopyrite .

查清了矿石中的铁主要以褐铁矿的形式存在，磷主要以胶磷矿的形式存在，砷主要以砷黄铁矿的形式存在。

The influence of the arsenic concentration and the sodium lignosulphonate concentration on the growth of the thiobacillus ferrooxidans strains, as well as the rates of bacterial oxidation of arsenopyrite and pyrite were studied.

本文着重研究了氧化亚铁硫杆菌对砷黄铁矿和黄铁矿单矿物的氧化规律及其性能之差异，考察其对砷的适应能力及表面活性剂的影响。

The results show that the oxidation process of arsenopyrite is speeded up with increasing concentration of FeCl3solution and rising temperature of reaction within the temperature range of 15~35℃, whereas the reaction rate of arsenopyrite is reduced at 45℃, and that the arsenic released from the reaction of arsenopyrite with FeCl3acidic solutions whose concentration is lower than 1×10-4mol·kg-1is in the form of As, which is likely to be soon oxidized into As in the FeCl3acidic solution.

结果显示：在温度为 15~35℃内，毒砂的氧化随FeCl3溶液浓度增加和反应温度升高而加速，而45℃时毒砂的反应速率反而降低；毒砂在与氧化剂FeCl3酸性溶液(浓度小于1×10-4mol·kg-1)反应时释放到溶液中的砷为As，As在FeCl3酸性溶液中很快被氧化成As。

Typical of the dopant chemistry is the reaction for arsine, which is depicted with the deposition process in Fig.

砷化三氢的反应是典型的掺杂化学反应，图9显示了该反应的淀积过程。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐