它们都是手性分子，属于外消旋体。
发现旋光基质有外消旋作用。
Racemization is found with optically active substrate substrates.
发现旋光基质有外消旋作用。
本发明公开了一种外消旋化舍曲林异构体的方法。
The invention discloses a method for the racemization of sertraline isomer.
外消旋体拆分是获得单一手性化合物的重要途径。
Raceme separation is the main rout for preparation of pure enantiomers.
外消旋体的动力学拆分反应是制备手性化合物的重要方法之一。
The kinetic resolution of raceme is one of the important ways in the synthesis of chiral compounds.
目的制备左沙丁胺醇盐酸盐，并对拆分后得到的S-沙丁胺醇进行外消旋化。
OBJECTIVE To prepare levalbuterol hydrochloride and make S-salbuterol racemized after the resolution.
萃取拆分技术适用性强、于连续拆分有望成为外消旋体拆分分离操作的先进技术。
It is hopeful that the extraction separation method will become the advanced technique for the racemates separation.
利用外消旋体进行化学-酶催化动态动力学拆分是制备单一手性化合物的有效手段之一。
The chemoenzymatic dynamic kinetic resolution(DKR) of racemates is one of the efficient ways in the preparation of single chiral compounds.
在许多情况下，外消旋药物中的单一对映体分别具有不同的疗效，有的甚至有相反的作用。
In many cases, racemic drug's single antipode has different curative effect, sometimes it even has adverse action.
目的观察国产外消旋聚乳酸(PDLLA)材料为细胞载体对软骨细胞吸附生长增殖的影响。
Objective To observe the effect of the poly dl lactide (PDLLA) used as cell culturing scaffold on the growth of rabbit chondrocytes.
从螺旋理论看，芳香轮烯和非芳香轮烯都是内消旋体和外消旋体的混合物，故都不呈现旋光性。
In the light of the helix theory, aromatic annulenes and non-aromatic annulcncs are all the mixture of the mesomer and raceme, so they haven't opticity activeity.
截至他的研究小组出台新报告之前，科学家们未曾对比过同一颗牙齿的外消旋化以及碳14分析结果，布赫兹说道。
Until his group's new report, scientists hadn't compared racemization and C-14 analyses on the same teeth, Buchholz says.
外消旋体、（R）-异构体和（S）-异构体具有相同的化学结构式，具有不同的立体结构和旋光性能。
The raceme, the (R)-isomer and the (S)-isomer are identical in chemical structural formula but different in stereostructure and optical rotation performance.
因此，倘若尸身被置于火场中，会完全扭曲外消旋化技术所判断的牙齿外观年龄——尸身被置于沙漠也同理。
So being in a fire will totally distort a tooth's apparent age via this technique - as might being left in a desert.
采用化学方法以肉碱为底物，合成了外消旋乙酰肉碱，精制后可获得纯度99%以上的乙酰肉碱，收率为96%。
Acetyl L carnitine was synthesized from racemic carnitine chloride and acetic acid by chemical means. The purity of the refined product was over 99% and the yield was about 96%.
本发明的合成方法简便直接，从外消旋的螺环二酮出发得到螺环骨架具有不同绝对构型的光 学纯的手性配体。
The synthetic method is simple and convenient and direct; and the spiral ring skeleton obtained from spiro-diketone has optical pure chiral ligand with different absolute configurations.
顺便说一下，如果你好奇为什么在判断牙齿年龄方面、外消旋化会比碳14定义的时钟精度差之甚多，那么部分原因与温度相关。
By the way, if you're curious about why racemization is so much less accurate a clock than C-14 for dating a tooth's age, part of the explanation has to do with temperature.
通过分析其天冬氨酸发生了多少外消旋化，科学家可以确定牙齿主人在多大岁数死亡——通常精确到5年半左右，正负差4.2年。
By analyzing how much racemization of its aspartic acid occurred, scientists can determine how old the tooth's owner was at death - generally accurate to about 5.5 years, plus or minus 4.2 years.
外消旋体拆分是获取单一对映体药物的主要方法，将主客化学引入化学拆分发明的包结拆分法突破了经典拆分方法的局限；
The main method used to obtain monoenantiotropic drugs is resolution of raceme. Resolution inclusion method breaks through the limitation of classical resolutions by introducing host guest chemistry.
利用化学方法，由外消旋环氧氯丙烷出发，合成丁酸环氧丙酯，精制后可获得纯度96%以上的丁酸环氧丙酯，收率为47%。
Glycidyl butyrate was synthesized from racemic epichlorohydrin and butyric acid by chemical means. The purity of the refined product was over 96% and the yield was about 47%.
以有机碱为催化剂 ，通过三唑三甲基丙酮与2 ，4-二氯苯甲醛的反应 ，合成了具有生物活性的外消旋体化合物烯唑醇。
By using alkalamides as the catalyst, diniconazole has been synthesized by the reaction of triazolyl-trimethylacetone and 2,4-dichlorobenzaldehyde.
本文综述了外消旋体的拆分方法，包括机械拆分法、化学拆分法、生物化学拆分法、 色谱拆分法、萃取拆分法、膜拆分法等六大类方法。
This article reviews resolution methods of raceme which includes six categories, such as mechanical , chemical, biochemical, chromato-graphic, extractive and membranous methods.
本文综述了外消旋体的拆分方法，包括机械拆分法、化学拆分法、生物化学拆分法、 色谱拆分法、萃取拆分法、膜拆分法等六大类方法。
This article reviews resolution methods of raceme which includes six categories, such as mechanical , chemical, biochemical, chromato-graphic, extractive and membranous methods.
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