查询词典 racemate

This yields values of zero for a racemate and 100 percent for a pure enantiomer.

对于消旋物来说，该值为0，若为纯的光学异构体，则为100%。

The conditions and equipment should be shown to be suitable to confirm the stereochemical identity of a racemate or an enantiomer.

所用仪器和条件都要能适用于消旋物或光学异构体的结构确认。

They are all chiral molecules and belong in the racemate .

它们都是手性分子，属于外消旋体。

Recent research progresses of method of preparation in chiral compound's racemate of amino acids were reviewed in this paper, the possible development future of it was predicted.

综述了近年来含氨基酸的手性化合物外消旋体的制取方法，并展望了其研究发展的前景。

The purpose of the present work is to conduct the basic and process studies on the resolution of racemate by enzyme-catalyzed reaction.

本研究目的在于采用酶催化反应来分离难以用物理方法分离的外消旋物。

More than 60%conversion of the racemate with enantiomeric excess of product higher than 96%was obtained.

当转化率超过60％时，产物-萘普生的对映体过量值仍在96％以上。

Optimization of resolution conditions and affecting factors on resolution such as solvent, the molecular ratio of racemate to resolving agent, method of reaction, concentration of racemate, crystallization temperature and crystallization time were studied.

对影响拆分的因素溶剂和底物浓度通过均匀实验进行了优化，同时对其他影响因素如底物与拆分剂投料比、反应物溶解方式、结晶时间和结晶温度等进行了考察。

In the case of racemate 2, better resolution was obtained when using 2-propanol as modifier in the place of methanol and ethanol, while for racemate 1, methanol provided the best performance. Both retention and resolution decreased with increase in pressure.

结果表明对映体的保留因子均随着改性剂含量的增加而显著下降，当改性剂含量大于10%时，保留因子的下降趋势变缓；分离帕罗酮酯时，异丙醇作改性剂的分离度和分离因子均最大，分离帕罗醇对映体时，甲醇是最佳的改性剂。

The result indicated that only a partial separation of atropine racemate could be obtained with ADMPC-CSP, whereas a baseline separation of atropine racemate could be achieved with CDMPC-CSP.

在正己烷中加入了不同的醇类改性剂对阿托品进行拆分，并优化了流动相中醇类改性剂的比例。结果发现，阿托品在CDMPC固定相上可以得到基线拆分，而在ADMPC固定相上只能得到部分拆分。

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。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。