汞

Experiments showed that inorganic mercury and phenyl mercury could be adsorbed by activated carbon in 0.5% aqua regia with adsorption time of 1.5 hours. The adsorption percentage was 97% for inorganic mercury and 96.5% for phenyl mercury.

结果表明，在活性炭用量为0.2g，φ=0.5%的王水介质中搅拌1.5h，无机汞和苯基汞的吸附率均达96%以上，无机汞和苯基汞的吸附容量分别为82.5μg/g和66.0μg/g。

PAHs ratios are used to identify the source of PAHs, the result showed that the major source of 16 PAHs in Urumqi Xinshi district was coal-bustion and vehicle discharges . Mercury in TSP samples were digested by aqua regia and analyzed by AFS analyzer .The results showed that : the concentration of mercury was 0.869-1.91 ng m-3.Compared with other cities in the rest of the world , the concentration of mercury was very high. The concentration of mercury in heating season was lower than that in no-heating season.

对大气颗粒物样品中的汞，采用王水于特弗龙消解罐中加热消解的方法进行处理，稀酸定容后采用原子荧光光谱法对样品中的汞进行测定，测定结果为。869-1.91 ng m-3，与国外城市相比较高；实验测得非采暖期乌鲁木齐大气颗粒物汞浓度的均值高于采暖期颗粒物中的汞浓度，其原因可能是由于随着非采暖期温的升高，长期积累在土壤、水体环境中的汞向大气中释放，附着在颗粒物上，过了燃煤的影响。

And the condition of directly determine the trace mercury in the fish-pond water of our school with this generation system and the mercury meas urer machine is discussed.

介绍一种用于冷原子吸收光谱分析法测汞的新型的汞蒸气发生器，并探讨了将该发生器与测汞仪配合直接测定水中痕量汞的工作条件。

In order to observe the effects of mercuric chloride to physiological and biochemical indexes of blood at low doses in SD rats, 24 SD rats were separated into control group, low dose group of mercury (50 mg/L), middle dose group of mercury (100 mg/L), high dose group of mercury (200 mg/L), which were given in the drinking water.

为了研究低剂量汞对SD大鼠血液生理生化指标的影响，24只SD大鼠被随机分为4组，分别为对照组，汞低剂量组（50 mg/L），汞中剂量组（100 mg/L），汞高剂量组（200 mg/L），采用自由饮水染毒，染毒时间为21d。

The soil urease and invertase activity effected by Hg was investigated in different fertility soils. The results show that soil urease activity、maximum reaction velocity (Vmax、Vmax/Km) and reaction velocity constant k have remarkably negative correlation with Hg concentration so that these can be used as ecological indexes of soil polluted by Hg, Km changes a little indicating that the reaction mechanism of Hg and urease is nonreversible competitive restraint. Urease of low soil fertility is more damaged by Hg than that of high soil fertility, with severe pollution at Hg concentration of 6.00 and 14.79mg/kg respectively; while invertase is less sensitive to Hg than urease. Cultural time has less influence on the relationship of soil enzyme and Hg concentration.

对不同肥力土壤脲酶和转化酶活性受汞影响进行了研究，结果显示，土壤脲酶活性、最大反应速度Vmax 、Vmax/Km和反应速度常数k与汞浓度呈现显著或极显著负相关关系，表明其可作为土壤汞污染的生态指标；米氏常数Km则变化较小，表明汞与脲酶作用机理为不可逆竞争抑制；低肥力土壤脲酶比高肥力土壤脲酶受汞毒害作用更强，当汞浓度分别为6.00和14.79mg/kg时即达到严重污染；而转化酶对汞的敏感性较差；培养时间对土壤酶与汞浓度间关系影响较小。

Methods The mercury in urine, which is the total amount of inorganic mercury in urine, including those produced from organic mercury after treated by potassium bromate and potassium bromide, is determined by atomic absorption spectrophotometer after reduction into mercury atom with sodium borohydride.

方法］尿样中汞（尿中无机汞和经溴酸钾－溴化钾处理尿中有机汞生成的无机汞之和）以硼氢化钠还原生成汞原子蒸气，用原子吸收光谱仪测定其汞的含量。

The results show that the contents and distributions of mercury in Jiaozhou Bay were affected by coastal runoff and phytoplankton bloom The linear relationship between organic mercurv and the COD and the exponential relationship between inorganic mercury and chl-a implied that marine phytoplankton could absorpt mercury in sea water and played an important role in controling the speciations of mercury in the Bay.

测定结果表明，胶州湾中汞含量和分布规律与浮游植物的盛衰和陆地迳流有关。有机汞和COD之间存在着线性关系，溶解无机汞含量随叶绿素a含量增加呈指数下降，表明浮游植物对汞的富集及其在海水中形态的转化起着十分重要的作用。

Mercury contents in the polluted rivers and soils are usually high when it is high in the goldmine wastewater and tailings debris. Because the environment polluted by mercury is very difficult to recover and some biology can highly enrich mercury in their bodies, it is necessary to strengthen manage the tailings debris and ban amalgamation process and the low technique individual gold digger.

金矿废水废渣中汞含量高，则受其污染的河流和土壤中汞含量也相应较高，由于环境汞污染的永久性和难修复性，以及某些生物对环境中的汞有富集放大作用，因此除了加强对已产生的尾矿渣的管理外，还应该坚决取缔混汞法和技术水平低下的个体采金行为。

Although it is known that small amounts of mercury are vaporizedwhen the fillings are used to chew food,and though Canada,France and Sweden have all placed restrictions on the use of mercury fillings,the FDA has always insisted that amalgams are safe.

所谓的银汞合金或者是填充材料，是用汞和其他材料混合制成的，这种方法从1800年就使用了尽管知道当填充材料用于咀嚼食物时少量的汞能被蒸发和吸入，尽管加拿大、法国和瑞典都将限制使用汞补牙，美国食品药品管理局还是坚持汞合金是安全的

The influences of environmental factors on the abiotic methylation were studied. The biggest production of methylmercury was found after 2 days of incubation in presence of FA. The rate of production of methylmercury depends upon temperature. In presence of FA from sediment, the biggest production of methylmercury was found under 40℃. In presence of FA from soil, production rate increases with temperature. The biggest production of methylmercury was found when solution pH was 2 and 4 in presence of FA from sediment and soil, respectively. Increase in concentrations of inorganic mercury and FA solution causes an increase in the production of methylmercury. Under irradiation with ultraviolet ray, blacklight lamp as well as natural light, methylation is stimulated, especial for irradiation of ultraviolet light.

环境条件对汞甲基化作用的影响研究得出，在底泥和土壤FA体系中甲基汞产量均在反应2天后达到最大值；在底泥FA体系中汞的甲基化在反应温度为40℃时产量最大，而在土壤FA体系中，甲基汞产量在10～60℃之间随反应温度升高而增加；底泥和土壤FA体系中汞的甲基化分别在pH值为2和4时最大；甲基汞产量均随无机汞浓度和腐殖质浓度的增加而增加；紫外线、黑光灯和自然光照射都可促进甲基汞的生成，紫外线的作用尤其明显。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。