查询词典 chiral

The asymmetric reduction of prochiral P-oxo ester, aromatic ketone and aliphatic ketone to its corresponding chiral alcohol by yeast cells were studied respectively in this work when ethyl 4-chloro-3-oxobutyrate, acetophenone and 2-octanone were as the model substrates.

本文以4-氯乙酰乙酸乙酯、苯乙酮和2-辛酮分别为β-羰基酯、芳香酮和脂肪酮的模型底物，研究了利用活性酵母细胞催化这三类前手性酮不对称还原合成相应手性醇的反应特性。

The advances in asymmetric reduction of prochiral ketones to chiral alcohol s with biocatalysis are reviewed.

综述了国内外利用生物催化羰基的不对称还原合成手性醇的研究情况。

A chiral boron catalyst is synthesized starting from L- or D-tartaric acid.

手性硼催化剂是从L-或D-酒石酸开始合成的。

Macrocyclic supramolecular drugs forming by macrocycle s with special structure and high selectivity according to their different purpose could play important parts in the drug-controlled releasing, chiral recognition, mimic enzyme, molecular switch, and so on, especially supramolecular drugs can help to improve solubility, bioavailability of drugs and realize targeting when it encapsulates drugs.

具有独特的结构和高选择性的大环化合物所形成的大环类超分子药物可根据其目的不同在药物控制释放、手性识别、模拟酶、分子开关等方面起着重要作用，能大大改善药物的溶解度、生物利用度及实现靶向作用等，因此大环超分子药物为化学药物治疗提供了新的推动力。

Of your text book to complement our discussion of Heavy Mesons in Chiral Perturbation theory.

阅读教材第五章以补充关于手征微扰理论中重介子的讨论。

Of your text book to complement our discussion of Heavy Mesons in Chiral Perturbation theory.

阅读教材第五章以补充关於手则微扰理论中重介子的讨论。

The QSERR modelings have good stability and accuracy for prediction of the chromatographic retention of α-amino acids on the crown chiral stationary phase.

建立的QSERR模型具有较好的稳定性和预测能力。

A series of novel double helicates,{A[Mo2VIO4LnIII(H2O)6(C4H2O6)2]·4H2O}n (Ln = Sm, Eu, Gd, Ho, Yb, Y; C4H2O6 = L-tartaric acid; A = NH4 or H3O), have been synthesized from the reactions of chiral ligands L-tartaric acid with molybdates as well as lanthanide cations.

利用简单的手性有机配体L-酒石酸成功地合成出了一系列类似DNA螺旋构型的左、右旋的一维链状聚合物：{A[Mo2VIO4LnIII(H2O)6(C4H2O6)2]·4H2O}n (Ln = Sm， Eu， Gd， Ho， Yb， Y； C4H2O6 = L-或 D-酒石酸； A = NH4 或 H3O)。

For the research on chiral discrimination of soluble polymer-supported tartrates as stationary phases of CGC, one of the ligands, di (polyethylene glycol monomethyl ether) tartrate was used as stationary phase and a column was prepared.

为研究可溶性聚合物支载的酒石酸酯作为气相色谱固定相的手性识别能力，配体之一酒石酸二酯被用作固定相制备成色谱柱。

Methods We introduce several major chemical reactions of microbialtransformation and the applications of microbialtransformation in synthesise of chiral drugs,metabolism of drugs and natural drug s by analysis of literatures about microbialtransformation base on many references.

方法在查阅国内外文献的基础上，简介了微生物转化的几种主要化学反应和微生物转化在手性药物合成、药物代谢及天然药物中的应用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。