对映的

Perhaps out of a yearning for their homeland, they had even engraved on a taihu rock four Chinese characters:"Er Quan Ying Yue"meaning"two springs reflecting the moonlight."These characters were painted red and written in an ancient calligraphic style. The homesick Chinese teachers seemed to feel that at the sight of these characters, they could by a flight of the imagination bring to their presence a native moon smilingly beaming over West Lake.

他们在池中放了些水草和金鱼，可能是为了抒发对祖国的怀念之情吧，还在太湖石上用秀丽的隶书字体刻了"二泉映月"四个红字，似乎这么一来，西湖便在他们的怀抱之中了，故乡的月便也在向着这些游子微笑了。

In general, the phosphoamino acid esters were unable to transfer their phosphoryl group to other hydroxyl nucleophiles even with the presence of imidazole, but the N-phosphoserine and threonine esters were two exceptions.

二、测定了部分磷酰化D—氨基酸的磷酰基转移反应速率常数，并对外消旋化合物的酯交换反应进行了旋光度跟踪，发现磷酰化丝、苏氨酸的对映体有明显的区别。

In our method the favorite resolving agent to a given racemate and suitable resolution method can be found, and it can be predicted which enantiomer is expected in excess in the crystallized diastereomeric salt.

通过该方法，可寻找到对于特定的消旋物理想的拆分剂以及合适的拆分方法，并且可预测在非对映体盐中，何种形式的盐将占主体。

It is well known that P450 enzymes in mammals represent products of a supergene family, but the majority of compounds are metabolized by three different P450 families.

现在认为大多数药物是由P450 Ⅰ、Ⅱ、Ⅲ三个家族代谢的。clau对映体的羟化代谢反应是由哪一个家族的亚酶代谢的呢？

It was found that the binaphthyl backbone of S configuration was matched to the S, S pyrrolidino group. In this case, the asymmetric allylation product could be obtained in 85. 6% ee.

轴手性是S构型时，和中心手性S，S构型相匹配，它和钯形成的络合物在催化烯丙基取代反应时，取得了比不含中心手性因素的吡咯烷基氮膦配体高得多的对映选择性，可以得到85.6％ee值的产物。

The effects of cholic acid concentration and pH of the buffer on separation were studied, and the influences of organic additives such as methanol, acetonitrile, isopropyl alcohol were also examined.

该实验表明电化学检测同样可用于手性物质的分离，从而扩宽了电化学检测的应用范围，并为对映体的定量合成和纯度测定找到了灵敏的检测方法。

Ee were achieved in the Pd (0)-catalyzed asymmetric reaction of racemic 1, 3-dipheylprop-2-en-1-yl acetate with dimethyl malonate under the optimized reaction conditions.

在钯催化的乙酸1，3-二苯基烯丙基酯与丙二酸二甲酯的不对称反应中，取得了接近定量的收率和较好的对映选择性（71.2％ee）。

Domestic and abroad examples are introduced to illustrate the research and development status of both biocatalytic oxidoreduction and hydrolase -mediated enantioselective synthesis.

本文概述了生物催化技术近年来迅速发展的背景、现状和前景，特别谈到酶在手性合成领域的广泛应用；结合国内外实例，分别介绍了生物催化的不对称氧化还原反应和水解酶催化的对映选择性合成两个主要方面的研究与开发动态。

New methods for asymmetric synthesis of pinacol are reviewed, the catalytic effects and stereo- selectivity with various catalytic systems are discussed in this paper.

综述了近年来不同催化体系的不对称合成呐醇的方法，并总结了不同的催化效率和对映选择性的差异

Starting from chiral proline, pipecolinic acid, piperazine-2-carboxylic acid and 1,2-diphenyl amino alcohol, a series of structurally simple and easily prepared amides were developed as highly effective Lewis basic organocatalysts for the asymmetric reduction of imines with trichlorosilane as the reducing agent, which promoted the reduction of N-aryl imines with high yields and excellent enantioselectivities with an unprecedented substrate spectrum.

本文分别由手性脯氨酸、哌啶酸、哌嗪酸以及氨基醇出发，设计和合成了一系列结构新颖、合成简便、性能优良的酰胺类有机小分子路易斯碱催化剂，以廉价的三氯氢硅为氢源，用这些催化剂催化亚胺不对称还原，得到了非常优良的收率、对映选择性和前所未有的底物普适性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐