映

Where ee〓 is the enantiomeric excess of the initial antipodal mixture, ee'is the enantiomeric excess of the recycled product fraction.

其中ee〓、ee'分别为初始对映体混合物和产物的对映体过量值。

In the forth part, in the presence of chiral phosphoric acid, highly enantio-enriched (up to 98% ee)α-aryl glycine derivatives could be synthesized via asymmetric transfer hydrogenation of the α-aryl imino esters using Hantzsch ester as the hydrogen source.

第四部分工作中，利用Hantzsch酯作为氢源，高对映选择性地实现了手性磷酸催化芳基酮酸酯亚胺的不对称仿生氢化反应，以最高98％的对映选择性得到苯甘氨酸衍生物。

The temporal changes′ value of gravity point cumulate to 120 × 10-8m·s-2 shows that gravity field near meizoseismal region have fast increased after the Wenchuan M S8.0 earthquake.

映秀及北川重力点值时序变化累积量达120×10-8m·s-2，较好地反映了汶川地震前映秀和北川两个极震区附近的重力测点随时间的剧烈波动性上升变化。

It was found that manganese porphyrins linked with stable nitroxyl radials could oxidize sulfides using NaOCl as the oxidant to give the corresponding sulfoxides in good to excellent yields (80-97%) with high chemoselectivity and diasteroselectivity (dr≥7:1 for glycosyl sulfoxides).

发现连有稳定氮氧自由基的卟啉锰络合物对NaOCl选择性氧化各种硫醚底物有较好的催化效果，获得了高的产率(80％～97％)、化学选择性和非对映选择性(糖基亚砜非对映异构体的比例大于7：1)。

Using one chiral ligand of each type respectively to investigate the infection of the structure and the amount of chiral ligands, the structure of reactant, the temprature and duration, solvent and reductive metal in pinacol coupling reactions.

三、系统考察了手性配体的结构和用量、底物结构、反应温度、时间、溶剂及还原金属对Pinacol偶联反应的化学产率、非对映选择性和对映选择性的影响。

Expanding pinacol reductive coupling reaction into asymmetric one with both diastereoselectivity and enantioselectivity may lead to its application in synthesising medicaments and biologic active compounds with structure of vicinal diol. Asymmetric pinacol coupling reaction is also the most compact and effecient method in synthesizing chiral ligands or chiral auxiliary with C〓 symmetry.

将这一反应发展成为既有高度的非对映选择性，又有高度对映选择性的不对称偶联反应在合成许多含有手性邻二醇结构的药物或生物活性物质将有更重要的应用，同时不对称Piancol偶联反应也是合成C〓对称性的邻二醇多用途手性配体或手性助剂的最为简捷有效的方法。

The invention includes all sterioisomeric forms, including individual diastereoisomers and enantiomers of the compound of formula as well as racemic and non-racemic mixtures thereof.

本发明包括式化合物所有的立体异构形式，包括单个的非对映异构体和对映异构体，及其外消旋的和非外消旋的混合物。

Footage was even shot for another episode with her in the role, but due to a contract dispute between her and Saban Entertainment, the footage was scrapped, the episode's rewritten and re shot.

映像，为了摄影另外的小故事，也完成她的作用，不过，为了她有的这样的间的契约纠纷saban娱乐，映像废止，是那个小故事的另写和再发射。

Our evaluations show that there is about 200 kbytes sharable objects between program images.

实验显示映像档平均有200 Kbytes的物件可以共享，这些物件平均占整个映像档17%。

The world itself becomes the "central" controller; the unmapped environment becomes the map.

外部世界自身成为&中央&控制者；没有映像的环境成为映像本身。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。