硫的

On the other hand, the corresponding bromohydroxylation of 1, 2-allenyl sulfides with Br〓 and water should be carried out in aqueous acete nitrile at 0℃.

在1，2-联烯基硫醚分子中由于同时存在着硫原子和具有两个相互垂直π-键的累积双烯结构，使其具有一些特殊的反应性能。

The results showed that the half of decay time of methyl parathion in Chinese cabbage was 2.91 days.

喷药后，在第零天、第一天、第二天、第三天、第五天、第七天分别取样，用气相色谱法分析测定甲基对硫磷在小白菜上的残留量，得出甲基对硫磷残留量与时间的关系。

Na〓 inhibited enzyme activity strongly. The kinetic parameters of Km and kcat against methyl parathion at 25℃ was 68. 6±5. 1μmol/L and 45 ±6 S〓 respectively.

Na〓对甲基对硫磷水解酶有较强的抑制作用。25℃时该酶对甲基对硫磷的米氏常数Km为68.6±5.1μmol／L，kcat为45±6 S〓。

The output of high-sulfur petroleum coke is increasing with the output of high-sulfur crude rising.

随着高硫原油产量的增加，高硫石油焦的产量也在增加。

The research on commercial application of high sulfur petroleum coke as fuel in cement industry was put forward.

对高硫石油焦作水泥工业燃料的工业应用试验结果进行了分析，证明高硫石油焦替代部分水泥燃料可以生产合格的水泥产品，烟气排放可以达到环保要求。

Furthermore, natural pyrite and pyrrhotite were succeeded to induce to produce troilite in laboratory.

由于陨硫铁具有比较特殊的物理性能，论文在上述研究的基础上，尝试利用黄铁矿、磁黄铁矿为原料合成陨硫铁。

Benzyloxy benzoyldimethylsulfoxide was prepared by the reaction of ethyl 4-benzyloxybenzoate and dimethyl sulfoxide in the presence of sodium hydride, followed by Pummerer reaction with concentrated hydrochloric acid to afford eo-hydroxy-co-thio-methyl-(4/-benzyloxy) acetophenone, which reacted with urea, thiosemicarbazide, semicarbazide hydrochloride and o-phenylenediamine to give imidazolidine-2,4-dione, l,2,4-triazine-3- one and quinoxaline derivatives, respectively.

本文用4-苄氧基苯甲酸乙酯和二甲亚砜为原料，在氢化钠存在下反应，合成了(4′-苄氧基)-苯甲酰基-二甲亚砜。研究了该亚砜在浓盐酸的存在下发生的Pummerer重排反应，用重排产物ω-羟基-ω-甲硫基-(4′-苄氧基)-苯乙酮分别与尿素、氨基脲、氨基硫脲和邻苯二胺反应合成了2，4-咪唑啉-二酮、1，2，4-三嗪-3-酮、喹喔啉等含氮杂环化合物。

In a few hours the amorphous sulfur reverts to small rhombic crystals and its rubbery property disappears.

过上几个小时无定形硫就会转变成结晶的单斜硫，它的弹性也会消失。

In the seventh chapter, the reaction of sodium hydrogen selenide with thiocarbamates and dithiocarbamates in ethanol as a selenium-containing reagent with good nucleophilic and reductive property were studied.

第七章进行了硒试剂NaHSe与硫代氨基甲酸酯和二硫代氨基甲酸酯的反应研究，并提出了反应的可能机理。

According to the reducibility of sodium thiosulfate ,the interference of sulfite is eliminated by formaldehyde and sodium thiosulfate is determined by indirect iodimetry with addition of excessive iodine.

根据硫代硫酸钠的还原性，以甲醛消除亚硫酸盐的干扰，加过量碘，间接法测定硫代硫酸钠。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。