和硫

According to the properties of substituted thiourea derivatives,4 symmetric and 12 unsymmetric thiourea compounds were synthesized by reaction of alkyl amine or substituted aniline with carbon bisulfide or some isothiocyanates .

针对不同活性的取代硫脲，采用脂肪胺或取代苯胺与二硫化碳或不同种类的异硫氰酸酯反应，合成了4种对称的和12种非对称的硫脲衍生物。

This specific preparation methods including: parathion of the initial reaction in acid and zinc metal in the common under redox reaction, a product of the reduction of parathion - parathion, with the sodium nitrite in the cold under diazotization reaction, and bovine serum protein tyrosine on the o-hydroxy combination of the adult immune original and immune rabbit polyclonal antibody preparation.

本发明制备方法具体包括：以对硫磷为反应初始物，在酸和金属锌的共同参与下进行氧化还原反应，得对硫磷还原产物对氨基对硫磷，再与亚硝酸钠在低温下进行重氮化反应后，与牛血清蛋白酪氨酸上羟基的邻位结合，制备成人工免疫原，并免疫新西兰大白兔制备多克隆抗体。

It can draw the conclusion thatδ~(34)S_ in solution has an approximate content(0±3‰)with S isotope of pyrrhoSne by measuring S and Pb isotope of sulfide in ore bodies,a lower value shows S in hydrothermal fluid is origin from magma;Linear array of Pb isotope in galenite suggests that Pb may be multisources.

对矿体硫化物进行硫和铅同位素测定，获得溶液的δ~(34)S_与磁黄铁矿硫同位素组成相近约等于0±3‰，δ~(34)S_值小，表明热液硫是岩浆来源，方铅矿铅同位素线性排列，暗示出铅可能是多来源的。

The conditions of S input on cropland and the character of S fertilizer consumption in China were studied based on the inquisitional and statistical data.

基于农业部统计数据、农户调查和行业统计数据，对农业生产中硫的输入状况与硫肥消费特征的分析表明，中国硫肥消费存在很大盲目性。

The conditions of S input on cropland and the character of S fertilizer consumption in China were studied based on the inquisitional and statistical data. The results shows that the S fertilizer consumption in China is unreasonable because excessive S is used in phosphate fertilizer producing area and traditional fertilizer using area without depending on the requirement.

基于农业部统计数据、农户调查和行业统计数据，对农业生产中硫的输入状况与硫肥消费特征的分析表明，中国硫肥消费存在很大盲目性，集中在过磷酸钙的生产或施用地区，缺乏整体的科学引导。

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 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。

It is shown in this paper that native ribonuclease and proinsulin can be nearly quantitatively formed catalyzed by PDI from a mixture of their S-sulfonated derivatives independent of the presence of each other.

我们研究了在体外PDI同时催化RNase和胰岛素原的S-磺酸型衍生物形成天然二硫键，结果表明，在合适的条件下，两者形成天然二硫键的产率互相不受影响，因此，我们推测PDI在生物体内可以同时催化多种蛋白质二硫键的形成。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。