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- Showing no optical activity in polarized light. 无旋光的极化光下无光学反应的
- Optical active ethyl 4-cloro-(R)-3-hydroxybutyrate was prepared by stereo selective bioreduction of ethyl 4-chloro-acetoacetate with baker's yeast. 以4 氯乙酰乙酸乙酯为原料,以面包酵母为手性生物催化剂,选择性合成光学活性4 氯 (R) 3 羟基丁酸乙酯。
- Racemization is found with optically active substrate substrates. 发现旋光基质有外消旋作用。
- Conversion of an optically active substance to a racemic form. 外消旋转化将光学活性物质转化为外消旋形式
- Influence of the Optical Activity of BSO on Spatial Light Modulator[J]. 引用该论文 孔迪;杨建坤;李修建;刘菊.
- The optical activity of a molecule is not determined by its chirality. 旋光性不是由手性决定的,因为手性是人为抽象出的一种概念。
- Combining with simulation by CoventorWare, the methods of using different thickness of grating margin, foursquare electrode, laddering electrode and thinner cantilever can increase the optical active area from 50% to 60%, 70%, 75%, 85% respectively. 利用CoventorWare仿真,采用不等厚光栅边距、正方形电极、阶梯型电极、减薄悬臂梁,分别将有效光学面积由50%25约提高至60%25, 70%25, 75%25, 85%25。
- Optical active alcohols were prepared by one-step reduction of prochiral ketones using sodium borohydride modified by \%N\%-benzyl-(\%3S,4S\%)-3,4-dihydroxy pyrrolidine. The effect of adding Lewis acids on reduction was also studied. 研究了以N 苄基 (3S ,4S) 3 ,4 二羟基四氢吡咯修饰的硼氢化钠对前手性酮的不对称还原反应 ,合成了五个光学活性醇 ,同时研究了添加路易斯酸对还原反应光学产率的影响。
- Asymmetric addition of organometallic reagents to imines is a fertile method for the synthesis of optical active amines, an important class of compounds in biochemistry as well as in pharmaceutics. 摘要手性胺类化合物是一类重要的有机化合物，在生物化学及药物合成中有广泛应用。有机金属化合物对亚胺的不对称加成反应是合成手性胺类化合物的重要方法之一。
- We optimize the signal gain of the optically active crystal and apply the results to a BSO and BTO crystal. 对旋光材料优化增益;并把处理结果应用于BSO和BTO晶体.
- For the reason why optical activity of mesomer is counteracted classical answer was not convincing. 指出了内消旋体消旋原因传统解释的不合理性。
- Optically active cyanohydrins are important intermediates lor the synthesis of agricultural chemicals. 光学活性氰醇是合成大量医药、农药产品的重要中间体。
- The product xylose is identified by silica gel TLC, optical activity measurement and other approval tests. 成品经过薄层层析和旋光测定等鉴定确定为木糖。
- Recent progresses of the synthesis of optically active tert-leucine are reviewed in this paper. 本文综述了近年来光学活性的叔亮氨酸的合成研究及最新进展。
- POLARIMETER - 10 units-Fully automatic polarimeter for measuring the rotation of optically active samples. 沈阳凯西贸易公司采购旋光仪;具体标准如下: .
- Furthermore, the spiral structure is the main reason for optical activeness of substance. 而由旋光方向和大小也可以推断其构型和构象。
- Chiral synthesis can be achieved by taking advantage of natural or synthetic optically active compounds. 在手性合成中利用了天然或合成的光学活性化合物。
- The formation of enantiopure optically active biomolecules is an important chapter in the history of evolution. 光学活性生物分子的形成是世界进化历史中一个重要过程。
- The optically active polymers obtained were soluble in DMF and DMSO under appropriate reaction condition. 产物可溶于DMF与DMSO中,具有旋光性。
- "The two enantiomers rotate polarized light through opposite angles, canceling each other out so that the racemic mixture has no optical activity. 两种对映体使偏振光向相反的角度旋转，彼此抵销，所以外消旋混合物没有光学活性。
