不对称的

On one hand the traditional price theories usually can neither explain supply and demand relation of the market nor the benefits allotment relation between the bargainers because of the incompletion of the market, such as monopoly, exterior, the information dissymmetry etc.

一方面，由于市场本身的不完全性，如垄断、外部性、信息不对称等因素的存在，传统的价格理论往往不能准确地解释市场的供求关系和交易者之间的利益分配关系；另一方面，随着经济的发展和现代信息技术所带来的便利，越来越多的物品(包括有形物品和无形物品)成为可以交易的商品，出现了越来越多的新市场。

Asymmetric catalytic activity of chiral spiroborate esters,- or-1,1′-bi-2-naphthoxyboric acid-proline anhydride [-1 or-1], toward borane reduction of prochiral imine s has been ob- served.

手性螺硼酸酯-或-1，1'-联-2-萘酚硼酸--脯氨酸酐[-1或-1]对前手性亚胺硼烷还原的不对称催化活性被观察到。

A chiral phase transfer catalyst, N-benzyl quinine bromide, was synthesized from natural chiral compound. And 2,5-bimethyl-4-(3-nitrobenzene)-1,4-bihydrogenation pyridine-3--4-methyl formate (viz. nitrendipine) was synthesized by this chiral phase transfer catalysis, and characterized by elemental analysis, infrared spectrum,1H nuclear magnetic resornace, and X-ray single-crystal diffraction.Key words: ammonium; chiral phase transfer catalyser; crystal structure

通过对天然手性物质进行修饰合成手性相转移催化剂N-苄基溴化奎宁，并对目标分子2，5-二甲基-4-(3-硝基苯)-1，4-二氢吡啶-3-甲酸乙酯-5-甲酸甲酯进行不对称催化合成，并通过红外光谱和核磁共振氢谱对化合物进行了表征，用X射线单晶衍射法测定了该化合物的晶体结构。

Because management capacities and capital are asymmetry which causes the separation of ownership and control, principals and contractors become copartners via contracts, and then the principal-agent problems arise.

由于管理才能与资产不对称，造成了所有权与经营权相分离，所有者和经营者通过契约关系成为合作伙伴，实现资源互补，同时也产生了委托代理的问题。

This method had been applied to determination of the optical purity of the product from asymmetric ring opening of meso- epoxides.

方法已用于非手性环氧化合物不对称开环反应产物β-氨基醇及β-羟基硫醚类化合物的光学纯度鉴定。

However,because the two places belong to different administrative areas,the production and sale of Chinese goldthread have the problems in homogeneity competition,local government protection,and sale information asymmetry and so on.

但由于 www.ddd tt。 com 两地分属于不同的行政区，黄连产销存在同质性竞争、地方政府保护和销售信息不对称等问题。

Shizhu County and Lichuan City should support each other and co-establish production and sale information platform of Chinese goldthread,and,meanwhile,cultivate the unified brand to occupy the international market of Chinese goldthread.

但由于两地分属于不同的行政区，黄连产销存在同质性竞争、地方政府保护和销售信息不对称等。两地应优势互补，共同搭建黄连产销信息平台；同时，还应培育统一品牌，共同抢占国际黄连市场。

Shizhu County and Lichuan City should support each other and co-establish production and sale information platform of Chinese goldthread,and,meanwhile,cultivate the unified brand to occupy the international market of Chinese goldthread.

但由于两地分属于不同的行政区，黄连产销存在同质性竞争、地方政府保护和销售信息不对称等问题。两地应优势互补，共同搭建黄连产销信息平台；同时，还应培育统一品牌，共同抢占国际黄连市场。

This review covers the recent advances on the asymmetric addition reactions of alkylzinc reagents with imines .

综述了烷基锌与亚胺不对称加成反应的最新进展。

In order to study the effect of PPh_2 group in the application of chiral ligands 4, 5, 7 and 8 to asymmetric reactions, two ferrocenyl amino alcohols 9a and 9b were Scheme 3 synthesized from chiral amino alcohol derived imines 3 (Scheme 3) and applied in the same asymmetric reactions.

为了探讨二苯氧膦基在配体参与不对称催化反应时对其催化活性和选择性的影响，合成了两个手性二茂铁基氨基醇配体9a和9b(Scheme 3)。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。