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The best conditions were: ethanol/acetone as solvent, molecular ratio of racemate to resolving agent 1.0:1.0, using heating as method of reaction, concentration of racemate 20mg/ml, crystallization temperature 1℃, crystallization time 8 days.

最佳结果为：乙醇／丙酮一 5.85，则为溶剂；L＜一卜苹果酸与佐匹克隆摩尔投料比为10二0；佐匹克隆20mg／ml；反应物溶解方式为加热处理；结晶温度l℃；结晶时间sd进行拆分。

In this paper research progress of synthesis of 1,1'- binaphthol and its derivatives by raceme resolution and asymmetry oxidative coupling reaction, related to 63 binaphthol compounds is detailed.

联二萘酚作为配体在催化不对称反应方面取得了极大的成功，是有机化学家研究的热点。

By ~(31)P NMR, it was found that the racemization of amino acids was minimized. And it seams that L-amino acid has different reaction acticity from the D-amino acids.

其次，从磷化学的角度研究了氨基酸的立体化学对酯交换反应的结构效应，发现了以磷酰基保护的氨基酸以及含磷缩合试剂的方法进行多肽的合成，氨基酸消旋现象很少发生。

The influences of the type and dosage of the aldehyde, organic acids, as well as the water content in the reaction system on the racemization were examined in detail, and L-Glu was racemized quickly in the presence of 0.2 molar ratio of L-Glu to salicylaldehyde in acetic acid containing 20% water.

详细考察了醛的种类及用量、羧酸溶剂的种类、反应体系的含水量对消旋化的影响，结果表明L-谷氨酸在含20%水的乙酸溶剂中，以水杨醛作为催化剂(水杨醛与L-谷氨酸的物质的量比为0.2)的优化条件下可以快速地被消旋化。

Thesereagents were proved to be more efficient than the corresponding halophosphoniumand halouronium salts in terms of reaction speed and racemization.

与目前应用较广的卤代脲正离子型缩合剂和卤代磷正离子型缩合剂相比，这些缩合剂具有反应活性高、产物消旋小、收率高等诸多优点，既可以用于液相合成也可用于固相合成。

Avoid radiation hazard, increase leukocytes and reduce adverse reaction of radiotherapy and chemotherapy.

防辐射损伤，增加白细胞，减轻放、化疗的不良反应。

The reaction of O( 3P) atom with CH 3 radical was studied by Density Function Theory and ab initio MO methods.

用分子轨道从头算和密度泛函理论中的B3LYP方法以及适中基组 6 - 311+G(2df，2p)对氧原子与甲基CH3反应进行了系统的研究。

It was the "Me Decade," a reaction against 60s radicalism reflected in fashion, film, the arts, and music.

这是"我十年"，对60年代的激进主义的反应体现在时尚，电影，艺术和音乐。

Another is the study of nuclear radii of light exoticnuclei and measurement of the total reaction cross sections.

第二部分是关于轻奇异核反应总截面的测量和核半径的提取。

Chemistry also uses calculus in determining reaction rates and radioactive decay.

化学也使用演算在确定反应速率和放射性衰变。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。