racemic

racemization is the conversion of an optically active form of a compound into a racemic mixture;

外消旋作用是把一种化合物的光学活性形式转化为外消旋的混合物；

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We found six amino acids showed distinct fingerprint spectra in the THz region. Our result also suggests that we can identify the enantiomers and their racemic compounds by measuring the absorption spectra in the THz region.

结果表明，所研究的氨基酸在此波段有特征吸收峰，THz时域光谱能够鉴别对映异构体和他们的外消旋化合物。

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Epoxidation and oxidation gave the racemic C 18-juvenile hormone.

通过环氧化和氧化就得到外消旋的含十八个碳的昆虫返动激素.

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Studies on asymmetric synthesis of steroids ⅱ. enantioselective reduction of some racemic bicyclic compounds by microbial catalysis

甾体不对称合成的研究11.若干消旋双环化合物微生物催化对映选择性还原

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The dominant method of preparing Daspartic acid is racemic resolution , especially enzymatic resolution.

目前其制备方法主要是消旋体的拆分, 其中酶法拆分最具竞争力.

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But by using dynamic kinetic resolution ( DKR) technology, the racemic starting materials can be transformed to one enantiomer totally and the yield can reaches 100%.

而采用动态动力学拆分方法，所有外消旋底物都能转化成单一的对映体，产率为100%。

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Racemic 2-methyl-1-phenylpropylamine was obtained by Friedel-Crafts reaction of benzene and isobutyryl chloride with the yield of 75.0%, then followed by Leuckart reaction in 85.0% yield.

本文以苯、异丁酰氯为原料通过傅克酰基化反应得到2-甲基-1-苯基丙酮，收率75.0%。

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Then various racemic alcohols were separated and their thermodynamic data were determined.

然后拆分了各种外消旋醇，测定并计算热力学数据。

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The racemic purity of cis-and trans-DCCA was 91.4 % and 93.0 %, respectively.

顺、反式二氯菊酸几何异构体含量分别为91.4%、93.0%.

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comparison of levobupivacaine, ropivacaine and racemic bupivacaine in patient-controlled epidural analgesia after cesarean section

左旋布比卡因、罗哌卡因及布比卡因硬膜外镇痛效果比较

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When considering biocatalysis, terms like kinetic racemic resolution or chiral syntheses immediately come to mind.

提到生物催化, 我们通常会想到外消旋物的动力学拆分和手性合成.

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DL-phenylalanine refers to a racemic mixture consisting of 50 % D-phenylalanine and 50 % L-phenylalanine.

苯丙氨酸是指一种消旋混合物,其中50%D-苯丙氨酸和50%左旋苯丙氨酸.

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Study of synthetic methods on racemic sex pheromone of Japanese Beetle

dl－日本丽金龟性信息素合成方法研究

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Comparison of motor block potential of epidural levobupivacaine and racemic bupivacaine during gynecological surgery

妇科硬膜外左旋与消旋布比卡因运动阻滞效能比较

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However, met-II obeys the concurrent two-sites model during polymerization, which can be attributed to the existence of "racemic-like" conformer in its system.

然而，催化剂met-Ⅱ在聚合过程中遵循双活性中心模型，可推测在催化剂met-Ⅱ体系中，有较为稳定的类外消旋体构象的存在。

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Optical resolution of a range racemic compounds was investigated.

考察了一些手性化合物在该固定相上的拆分.

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Synthesis of Racemic Sex Pheromone of Japanese Beetle by Alkenyl Cuprate Reagent

应用烯基铜锂试剂合成消旋日本丽金龟性信息素

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The stereoselective hydrolysis of racemic glycidyl esters catalyzed by lipase in a biphasic system was studied.

利用脂肪酶作为催化剂在双液相反应体系中对外消旋缩水甘油酯进行立体选择性的酯水解反应.

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A series of racemic R-3-pyridyl sulfoxides were successfully separated by a cellulose derivative based chiral stationary phase ( OB-H) under normal-phase high performance liquid chromatography ( HPLC) conditions.

利用正相高效液相色谱法在一种纤维素衍生物手性固定相（OB-H）上成功分离了一系列（7个）的R基-3-吡啶基亚砜的对映异构体。

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Preparation of Molecularly Imprinted Polymer with Racemic Cefradine as Template and Study on Its Chiral Resolution

以混旋的头孢拉定为模板的分子印迹聚合物的制备及拆分性能研究

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racemic mixtures of several proteinic amino acids were produced, as well as hydroxy acids, urea, and other organic molecules (miller 1993).

一周后，在这种大气里产生了几种蛋白质氨基酸的外消旋混合物，比如含氧酸，脲和其他的有机分子（Miller1993）。

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Chiral HPLC Determination of Conversion and Enantiomeric Excess of Enzyme Catalyzed Stereoselective Esterification of Racemic Ibuprofen

手性HPLC法测定布洛芬立体选择性酯化的转化率和对映体过量

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Study on resolution of racemic naproxen with chiral additive as mobile phase by RP-HPLC

手性流动相HPLC法拆分萘普生对映体的研究

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Study on the racemic theory of essential amino acid and protein nutrition

必需氨基酸消旋化理论的研究与蛋白质营养

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The safe range of erythro form racemic was 5-6 times larger than that of threo form racemic.

在有效剂量相似的情况下，赤式消旋体的安全范围比苏式消旋体高出5～6倍。

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The progress in synthesis of chiral mandelic acid and resolution of racemic mandelic acid are reviewed.

综述了手性扁桃酸的合成及外消旋扁桃酸拆分的研究进展.

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The in vitro antibacterial activities of 5a and 5b against 20 Gram-negative and Gram-positive bacteria were comparable to that of racemic compound 5c.

测定它们对20株临床分离和标准革兰阴性菌和标准革兰阳性菌的最低抑菌浓度。结果表明，5a和5b的体外抗菌活性与外消旋体5c基本相当。

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Effect of the Microenvironment of Lipase on Resolution of Racemic 2-Octanol Catalyzed by Lipase

微环境对脂肪酶催化拆分外消旋2－辛醇的影响

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Operation Optimization of Bulk Liquid Phase PP Plant Resolution of Racemic Clenbuterol by Bulk Liquid Membrane and Study on Its Kinetics

间歇式液相本体法聚丙烯闪蒸操作分析厚体液膜拆分克伦特罗外消旋体及其动力学研究

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