硫

Effects of pH,water quality and temperature on degradation of malathion were examined using orthogonal experimental design and the optimal malathion-degrading conditions in environmental water were determined.

为了减少马拉硫磷对水环境的影响，寻求马拉硫磷在水体中降解的最佳环境条件，利用正交试验设计法考察了pH、水质、温度等环境因素对马拉硫磷在环境水体中降解的影响。

The method for using Malathion is to apply the Malathion to dry hair and leave for eight hours, after the eight hours you can wash the Malathion out.

该方法使用马拉硫磷，是适用於马拉硫磷干头发和离开八小时后，八小时，您可以洗马拉硫磷。

The load carrying capacity and antiwear property of S,P containing benzotriazole derivative (BM 3) were evaluated using a four ball test machine,and compared with those of zinc salt di(T 202 ) and amine salt of complex ester thiophosphate (T 307 ). The antiwear mechanism of BM 3 were studied by investigating the chemical states and the mass fraction of elements on the rubbed surfaces using X ray photoelectron spectroscopy and electron probe microanalysis and the thermal decomposition products using gas chromatography mass spectrograph.

在四球机上对照评价了含硫、磷苯并三氮唑衍生物（BM－3）和二丁辛基二硫代磷酸锌（T202）及硫磷酸复酯胺盐（T307）的承载能力和抗磨性能，用X射线光电子能谱仪和电子探针微分析仪等对磨斑表面元素N，S和P的存在形式及表面膜的组成进行了分析，用气相色谱－质谱联用仪对BM－3的热分解产物进行了分析，并且还对其极压抗磨作用机理作了探讨。

The sulfide was in the form of thiophene, mercaptan and thioether.

油样中的含硫化合物以噻吩类、硫醇和硫醚为主。

The analytical method for sodium methyl mercaptide was established based on the reaction in quantity between methyl mercaptan and iodine at the base condition.

采用甲硫醇与碘在碱性条件下定量反应生成双硫醚的反应原理，建立了甲硫醇钠的定量分析方法。

Thus,total desulfurization percent of hydrotreated gasoline increases,and mercaptan sulfur content reduces,because of the higher depth of reaction.

通过提高反应深度，加氢汽油总硫的脱除率提高，汽油中硫醇硫含量下降。

The microwave-assisted extraction and Florisil solid phase extraction conditions were optimized. Under the optimum condition, the recoveries of 18 organochlorine pesticides (α-HCH,β-HCH,γ-HCH,δ-HCH, heptachlor, aldrin, heptachlor epoxide, endosulfan Ⅰ, p, p'-DDE, dieldrin, endrin, endosulfan Ⅱ, p, p'-DDD, o, p'-DDT, endrin aldehyde, endosulfan sulfate, p, p'-DDT, methoxychlor) were

优化了微波萃取和固相萃取柱净化条件，在最优条件下18种有机氯农药（α-HCH、β-HCH、γ-HCH、δ-HCH、七氯、艾氏剂、环氧七氯、硫丹Ⅰ、p，p'-DDE、狄氏剂、异狄氏剂、硫丹Ⅱ、p，p'-DDD、o，p'-DDT、狄氏剂、异狄氏剂醛、硫丹硫酸酯、p，p'-DDT、甲氧滴滴涕）的回收率在

When the sulfur concentration is in the range of 0～4 mg/L, the elemental sulfur has a linear relation with the peak current of polarography.

该方法灵敏度高，当元素硫浓度为0.1 mg/L 时仍可以看到明显峰电流；精密度和准确度较好，对1 mg/L 元素硫的测定，标准偏差为0.02；元素硫浓度在0～4 mg/L 浓度范围与极谱峰电流呈线性关系。

Pyrites and non-ferrous smelter gases will remain to be the main sulphur resource for a long time in China for their abundant reserves.

中国硫铁矿及有色金属矿的资源比较丰富，在相当长的一段时间内，预计中国硫原料仍将以硫铁矿和有色金属冶炼烟气为主。

These results show that PIP has only one thermodynamically stable disulfide linkage, and the non-natural disulfide isomers could refold in vitro efficiently to from native PIP.

观察到PIP只有一种热力学稳定的二硫键配对方式，PIP的非天然二硫键异构体在巯基试剂存在的条件下可以高效转化为天然二硫键配对。

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