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- optically active alkaloid 光学活性生物碱
- 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
- 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.
- 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。
- Showing no optical activity in polarized light. 无旋光的极化光下无光学反应的
- 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: .
- 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。
- Optically active 3,4-diazaphospholane ligands and their application in asymmetric hydroformylation and allylic alkylation reactions. 旋光活性3,4-二甲基磷酸配体及其在不对称羟基化和烯丙基烃化反应中的应用。
- Asymmetric transformation becomes a more and more important branch in the preparation of optically active chemical compounds. 不对称转换是光学活性化合物制备中越来越重要的一个分支。
- A series of optically active sulfenimines carryins new caniphor based mer-capto chiral auxiliaries have been synthesized. 合成了四种含樟脑巯基手性助剂的光学活性的硫亚胺化合物。
- A mixture of equal parts of an optically active isomer and its enantiomer is termed racemic and has a net rotation of plane-polarized light of zero. 对映异构体，又称对掌异构物、光学异构物或镜像异构物，不能与完全与彼此立体异构体镜像完全重叠。
- Optically active ethyl(S)-3-hydroxybutyrate,a useful chiral synthon,was prepared by stereoselective reduction of ethyl acetoacetate of the bread yeast in organic solvent. 利用面包酵母在非水相中不对称还原乙酰乙酸乙酯,制备了光学活性的手性化合物S()-3-羟基丁酸乙酯。
- Kunta JR,Khan MA,Reddy IK.Effect of menthol on permeability of an optically active and racemic propranolol across guinea pig skin[J].J Pharm Sci,1997,86(12):1369. 许英爱;王雅君;李砥晖;等.;渗透促进剂增加复方骨质增生贴剂透皮渗透的研究[J]
- Stereoselective oxidoreductions catalyzed by enzymes or whole cells have been widely used for preparation of optically active alcohols and other chiral compounds. 摘要以立体选择性氧化还原酶或其全细胞催化的不对称氧化还原反应已经成为转化光学活性手性醇及其他手性化合物的有效手段。
- Kunta JR Khan MA Reddy IK.Effect of menthol on permeability of an optically active and racemic propranolol across guinea pig skin [J].J Pharm Sci 1997 86(12): 1369. 许英爱王雅君李砥晖等.;渗透促进剂增加复方骨质增生贴剂透皮渗透的研究
- In fact, l ipases often display high enantioselectivity, which makes these catalysts especi ally attractive for the interest for optically active compounds. 尤其脂肪酶在有机合成中经常表现出极高的立体选择性,因此它们经常被用于制备光学活性化合物。
