硫醚

The ligand of the chiral Schiff base and acetylacetone vanadium are subjected to complexation in situ, hydrogen peroxide is taken as an oxidant, aryl alkyl thioether asymmetric oxidation reaction is catalyzed in a toluene or dichloromethane solution under low temperature or room temperature, enantioselectivity of chiral sulphoxide is 72 percent to 95 percent ee, and yield is 42 percent to 83 percent.

将上述手性西佛碱配体与乙酰丙酮氧钒原位络合，采用双氧水为氧化剂，在甲苯或二氯甲烷溶液中低温至室温下催化芳基烷基硫醚不对称氧化反应，手性亚砜的对映选择性为72％-95％ee，产率为42％-83％。

It has its roots in the Soviet Sudaev PPS-43 submachine gun, which was copied in Finland as Tikkakoski M/44 , with some modifications (including change of caliber to 9mm and adaptation to use Suomi -type magazines).

它有它的根源在苏联 Sudaev聚苯硫醚- 43冲锋枪，这是芬兰复制作为蒂卡科斯基M/44使用，一些修改（包括改变口径为9毫米和适应芬兰语型杂志）。

This weapon in fact was a reverse-engineered copy of Soviet Sudaev PPS-43 submachine gun, adapted to 9x19 ammunition and used Suomi submachine gun magazines.

武器，这实际上是一种反向苏联 Sudaev聚苯硫醚工程副本- 43冲锋枪枪，适应9x19弹药和使用芬兰语冲锋枪杂志。

The shape and size of the cluster can be adjusted.πconjugate aryl alkynyl thio ethers containing thiomethyl in the end are important compounds. We can use such compounds to get some functional molecules that have good assemblied effect, especially in controlling the shape and the size of the cluster.

设计并合成一些形态多样的π共轭系多-SCH_3功能基的芳炔硫醚类分子对获得一些具有良好组装效果，尤其是能够控制团簇形态或控制团簇尺度有用的功能分子有着重要的理论和实际意义。

Diallyl trisulphide garlic,onion,shallot

二烯丙基三硫醚大蒜，洋葱，青葱

The third section: The novel method for synthesizing unsymmetrical sulfides was proposed.

第三部分研究内容：首次提出了不对称硫醚的新的合成方法。

Polyarylene sulfide is disclosed, of which extract with methylene chloride is in an amount of not more than 0.7 % by weight, a melt viscosity V6 is 20 to 15,000 poises and a content of -SX groups is at least 15 micro moles/g, wherein X represents an alkali metal or a hydrogen atom.

被公开的是聚芳硫醚，其具有二氯甲苯提出物的最为不大于0.7％重量，熔体粘度V6为20～15000泊和－SX基的含量至少为15微摩尔／克，其中X代表碱金属或氢原子。

The PPS 48 can be equipped with 48, 32, 24, 16 cavity molds for a maximum production output of 22,000 preforms per hour.

聚苯硫醚-48可以与48， 32， 24， 16填穴模配套以达到每小时22，000个预制件的最高产量。

The single-source ceramic precursor is synthesized by dimethylsulphide borane and dichloromethylvinylsilane and then pyrolyzed. The problem of this path, the elimination of by-product, NH4Cl, is discussed.

本文以甲基乙烯基二氯硅烷和二甲硫醚硼烷为原料，采用聚合物前驱体高温裂解的方法制备了SiBCN陶瓷，并分析了该路径的难点，即副产物的分离。

This method had been applied to determination of the optical purity of the product from asymmetric ring opening of meso- epoxides.

方法已用于非手性环氧化合物不对称开环反应产物β-氨基醇及β-羟基硫醚类化合物的光学纯度鉴定。

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％。