氰化

The best results 98% ee, 94% ee and 59% ee were obtained in silylcyanation of aldehydes, borane reduction of prochiral ketones and ketimines, respectively.

醛的硅氰化反应ee值最高达到98%，酮的硼烷还原反应ee值达94%，而亚胺的硼烷还原反应ee值只有59%。

Keywords: Enantioselective catalysis; phosphorus reagents; silylcyanation; borane reduction

中文关键词：对映选择催化；磷试剂；硅氰化；硼烷还原

Thirty-one new chiral phosphorus compounds have been synthesized starting from D-camphor,-alpha-phenylethylamine,-Betti base,-1-(4-nitrophenyl)-2-amino- propane-1,3-diol, L-amino acids (such as serine, phenylalanine, proline etc.) and their application as organocatalysts in asymmetric trimethylsilylcyanation of aldehydes and asymmetric borane reduction of prochiral ketones and ketimines were investigated.

该项目从D-樟脑、-alpha-苯乙胺、-Betti碱、-氯酶胺、L-氨基酸（如丝氨酸、苯丙氨酸、脯氨酸等）出发合成了31个新的手性磷化合物，研究了它们作为有机催化剂在醛的不对称硅氰化反应、潜手性酮的不对称硼烷还原反应以及亚胺的不对称硼烷还原反应中的催化效果。

Application of calcium peroxide has become wider and wider.It was not only used in the fields of rice direct sowing,edible fungus production,soil improvement,aquiculture,wastewater treatment,chemical production,and air purification etc.,but also it has been used as food and feed additive,fruit and vegetable preservative,assisting agent for gold extraction by cyanidation and so on.

过氧化钙可用于水稻直播、食用菌生产、土壤改良、水产养殖、污水处理、化工生产与空气净化等领域，可用作食品和饲料添加剂、水果和蔬菜保鲜剂、氰化法提金助剂等，有着越来越广泛的用途。

In the system a HCN gas absorption cell has been used as wavelength reference.

为实现高精度光纤非本征法布里-珀罗传感器和布拉格光纤光栅波长解调，设计并实现了一种基于可调谐光纤激光器的光纤传感波长解调系统，系统采用具有51条吸收谱线的氰化氢气体吸收池为波长参考基准，采用三次多项式拟合的方法来确定可调谐光纤F-P滤波器的波长与驱动电压的对应关系。

And the application of glycollic acid in the fields of chemical cleaning, auxiliaries and materials were introduced in detail.

概述了羟基乙酸几种主要工业合成方法的工艺条件及存在的主要问题，即氯乙酸水解法、氰化法、甲醛羰基化法和一氯乙酸钾水解法。

A brief account of technique conditions of several main technique routes for synthesizing glycollic acid and existing main problems in it are given.

概述了羟基乙酸几种主要工业合成方法的工艺条件及存在的主要问题，即氯乙酸水解法、氰化法、甲醛羰基化法和一氯乙酸钾水解法。

Following the industrialization programme for gold nanomaterials, auric chloride acid, potassium gold cyanide, superfine and nano-scale gold powders and"liquid gold"can be produced systematically.

为贵金属纳米材料的产业化指明了方向。提出了以粗金为原料，在工业上生产氯金酸、氰化亚金钾、超细和纳米金粉、金水等含金深加工产品的产业化系统方案。

Chemical products containing gold and silver, including gold chloride, gold and potassium cyanide, gold water, silver nitrate, silver oxide, silver chloride, silver iodide, silver bromide, etc.

含金银化工产品：包括氯化金、氰化金钾、金水、硝酸银、氧化银、氯化银、碘化银、溴化银等。

USE - Separation of gold from cyanogen group gold-containing liquid, such as metal-plating exfoliation liquid, for carrying out quantitative analysis of gold in cyanogen group gold-containing liquid.

该方法的使用性在于：从氰化含金液中分离金，并在此溶液中进行金的定量分析。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。