不对称

The asymmetric transformation of L-Pro via the formation of salt with S-tartaric acid was carried out by butanal as catalyst and butanoic acid as solvent to obtain D-Pro · S-TA salt.

实验研究了L一Pro的消旋反应，并获得刀乙一脯氨酸，然后在消旋的基础上研究L一Pro的不对称转换，最后得到D一Pro。

To the second expanded model, the buyback contract with promotional cost sharing is designed.

信息不对称情况下的契约设计已成为利益协调研究领域中的新热点。

This paper briefly describes the progress in cytoplasm reorganization, dynamics of wall callose, starch granules and organelles in pollen grains, the tapetum development, specific genes, asymmetric division and cell fate determination in developing pollens. Some problems and future research directions are pointed out in this review.

本文针对花粉发育过程中的细胞质改组；胼胝质壁、淀粉粒和细胞器的动态变化；绒毡层的发育；花粉发育特异基因；以及不对称分裂和细胞命运等几个生物学问题的研究进展作了简要综述，最后还提出了一些研究展望。

This paper briefly describes the progress in cytoplasm reorganization, dynamics of wall callose, starch granules and organel les in pollen grains, the tapetum development, specific genes, asymmetric division and cell fate determination in developing pollens. Some problems and future research directions are pointed out in this review.

本文针对花粉发育过程中的细胞质改组；胼胝质壁、淀粉粒和细胞器的动态变化；绒毡层的发育；花粉发育特异基因；以及不对称分裂和细胞命运等几个生物学问题的研究进展作了简要综述，最后还提出了一些研究展望。

Results: Among the 43 cases,callosity in 9 cases, haematoma in 6 cases, infection in 9 cases, fistula from injection point in 3 cases, asymmetry in 8 cases, leakage of filling in 2 cases, pain in 5 cases, hard mass in 1 cases were found.

结果：43例患者中，硬结9例、血肿6例、感染9例、注射孔形成窦道3例、两侧不对称8例、材料渗至乳房形态以外2例、疼痛5例、较硬包块1例。

The accounting information is the concentrated reflection of listed companies. Its quality directly influences the effective degree of capital market, the disposition efficiency of social resources as well as the accounting information in the supply-demand balance process. At the same time, the full disclosure of accounting information may save the transaction cost because of reducing the degree of information asymmetry in the release and the transaction process in the stock market.

会计信息，是上市公司经营状况的集中反映，其质量的高低直接决定着资本市场的有效程度、社会资源的配置效率以及会计信息在供求方面平衡过程；同时，会计信息的充分披露，可因降低证券市场发行与交易过程中的信息不对称而节约交易成本。

This review deals with the advances of their synthetic methods and applications in asymmetric catalysis in recent years.

本文综述了近年来其合成方法及其在不对称催化反应中应用研究的进展。

In this paper take an unsymmetrical catamaran as an object, used 3-D finite element method and empirical formula for the vibration characteristics of the hull.

本文以一艘不对称双体船为对象，分别采用三维有限元方法及经验公式法对其进行了船体总振动特性分析。

It was pointed out that introduction of cyano group into chain of the energetic binder could improve mechanical properties of solid propellant with it.

分析了3，3 双取代氧丁环上两个取代基的类型对其均聚物聚集态的影响，认为在3，3 位进行不对称取代可获得液态含能粘合剂。

When the ligand 52 and 54 with only planar chirality were used the high enantioselectivity was obtained.

我们对配体平面手性作用的研究表明平面手性可以独立地进行不对称诱导，最高给出93％的ee值。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。