砷

Gelena is pretreated by sulphatization, forming a layer of PbSO_4 film on its surface. The film has no effect on arsenic minerals and gelena is depressed during reverse flotation.

通过硫酸化预处理，可使方铅矿表面形成一层PbSO_4覆盖膜，而砷矿物不受影响，从而在反浮选中，方铅矿受到抑制。

A method for direct determination of Cu, Pb, Zn, S, Mg and As in copper sulphide concentrates by Axios PW4400 wavelength dispersive X-ray fluorescence spectrometer using lithium metaborate-lithium tetraborate fusion sample preparation method has been developed.

采用偏硼酸锂和四硼酸锂混合熔剂熔融法制样，波长色散X射线荧光光谱法测定铜精矿中铜、铅、锌、硫、镁、砷，考察了熔剂、玻璃化试剂和预氧化条件对制样的影响。

The results of thermodynamical calculation are basically concordance with the measured results.

计算结果与实测结果基本吻合，均表明砷化氢析出的标准平衡电势值正于-0.608V。

For the propose of finding high energy mid-infrared laser output, a compound cavity kalium titanyl arsenate optical parametric oscillator pumped by an electro-optic Q-switched flash-lamp-pumped 1064nm Nd:YAG laser was experimentally studied.

为了得到高能量中红外激光输出，对电光调Q灯抽运1064nm Nd： YAG抽运复合腔砷酸钛氧钾光学参变振荡器作了实验研究，在工作频率1Hz时得到OPO输出单脉冲能量36mJ，信号光脉宽10ns，闲频光波长3407nm，能量11mJ。

Arsenic is a notorious environmental toxicant known as a carcinogen in human beings.

中文摘要砷为环境中的毒性物质，也是人类可能的致癌因子之一。

The method is simple,rapid and with high sensitivity,and can be applied for the determination of trace amounts arsenic in Tricholoma giganteum.

该方法简单快速，灵敏度高，可作为药用真菌巨大口蘑中微量砷的测定方法。

A salt of tungstic acid .

一种由砷酸铜和醋酸铜形成的有毒复盐。

A pot experiment using sterile and unsterile arsenic-contaminated soil was carried out to study effects of different inoculation methods of photosynthetic bacteria on the growth and As uptake of tobacco.

采用灭菌以及未灭菌的湖南石门砷污染土壤（145.70 mg kg-1）的盆栽试验，研究光合细菌的不同施用方式对烟草Nicotiana tabacum L。

The extract of Agrocybe Cylindracea was rich in metal elements, including calcium(3.607mg/g), magnesium(3.021mg/g), zincum(79.3μg/g), iron(79.2μg/g).

茶树菇提取物含有丰富的钙(3.607 mg/g)、镁(3.021 mg/g)、锌(79.3μg/g)、铁(79.2μg/g)等元素，对机体有害的重金属元素铅(0.91μg/g)、砷(0.41μg/g)含量相对较低。

The desorption liquor can be used as neutralization reagent of the former coagulation precipitation process. 3The precipitate of ferrite coagulation is analyzed by XRD, EDX and FTIR. The results show that the precipitate is a noncrystal which contains As-O bond, O-As-O bond, Fe-O-Fe bond, SO_4~(2-)and -OH.

3铁盐沉砷过程中产生的沉淀物经过XRD、EDX、FTIR分析，得知为一种非晶态的化合物，化合物中含有As-O键、O-As-O键、Fe-O-Fe键、SO_4~(2-)、-OH基团，该沉淀物经过国家标准毒性浸出试验证实是一种安全无污染的固体物质。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。