不对称的

The catalytic activity of the mono- and bi-nuclear complexes, and unsymetric complex 〓〓 MeNTB =tris ( N-methylbenzimidazol-2-ylmethyl amine and tetranuclear complex 〓L = N, N, N', N'-tetrakis (N-methylbenzimidazol-2-ylmethyl-1,4-diaminobutane for oxidation of hexane was examined. Thedi-iron complexes with one exchangeable monodentate ligand and unsym-metric(μ-carboxylato) diiron complex exhibit high catalytic ac-tivity, while mononuclear Fe complex are inactive.

这些单核、双核化合物、不对称化合物〓-三氨和四核化合物〓四-1，4-丁二胺催化氧化环己烷的催化活性被测试，结果表明含有可交换配体氧桥联双核Fe化合物和不对称双核Fe化合物表现很高的催化活性，而单核的Fe化合物是非催化活性的。

Results Abnormal signal lesions were found in 47 patients with viral encephalitis, including multiple or single, symmetrical or asymmetrical large patch shape lesions, the located mainly in cortices, subcortical and basal ganglia and thalami. The lesions carried long T 1 and long T 2 on MRI. Enhanced MRI was performed in 22 cases, and demonstrated abnormal enhancement in 11 cases, including large patch or gyrus shape enhancement in 7 cases.

结果 病毒性脑炎脑内有多发或单发的对称或不对称大片状病灶，主要位于皮层、皮层下及基底节丘脑区，MRI呈长T1 长T2 信号，增强扫描22例，显示病灶强化者11例，其中呈大片状或脑回状强化者7例。

With the development of information economics, asymmetrical information becomes an important question of economics study, and signal hypothesis is based on the development of unsymmetrical information.

随着信息经济学的发展，信息不对称成为经济学研究的重点问题，信号假说是基于信息不对称而发展起来的。

The analytical contents of Chapter 6 are about the vibration features of the unsymmetrical support system.

第六章的分析内容是支承不对称系统的振动特征分析，支承不对称问题是由弹性支承故障而提出来的。

A general novel synthetic method to Symmetrically or unsymmetrically 2,3,6,7- substituted thieno[2,3-d:5,4-d\']dipyrimidine-4,5(3H,6H)-diones and 2-substituted benzothieno[3,2-d] pyrimidin-4(3H)-dione by utilizing aza-Wittig reaction was proposed firstly. This synthetic method has the advantage of easily accessible starting material, mild condition and good yields.

具体研究内容如下：1、首次研究了应用aza-Wittig反应方法合成2，3，6，7-对称与不对称四取代噻吩并[2，3-d；5，4-d\']双嘧啶-4，5(3H，6H)-二酮以及2-取代苯并噻吩并[3，2-d]嘧啶-4(3H)-酮衍生物的通用新方法，该方法原料易得，条件温和，收率较高。

Especially, chiral metal complexes and organo-catalysts in combination with electrophilic fluorinating reagents have found applications to the synthesis of a variety of chiral fluoroorganic compounds.

特别是，手性金属配合物和有机催化剂诱导的不对称催化氟化反应被广泛应用于各类手性氟化物的合成，已成为不对称氟化反应研究的热点。

Based on the analysis of asymmetrical information about agro-food quality and safety, this paper analyzes the emergence mechanism of agro-food quality and safety problems by using the gamed playing model.

信息不对称是微观经济学研究的核心问题，用来说明现代经济生活中，相关信息在相互对应的经济人之间不对称分布对经济活动的影响[1]。

Insurance assessment organization came into being at the very beginning for the purpose of relieving contradictions in the settlement of claims resulted from asymmetric information in insurance market, which is a typical market of information asymmetry.

保险市场是典型的信息不对称市场，保险公估人最初就是为了缓解保险当事人在保险理赔活动中由于信息不对称而出现的矛盾而产生的。

The asymmetric addition of terminal alkynes to aldehydes and ketones is an important method of synthesizing chiral propartyl alcohols and tertiary alcohols, which are important pharmaceutical intermediates.

末端炔对醛和酮的不对称加成是合成光学纯的炔丙醇和手性叔醇的重要方法，是不对称催化的重要研究课题之一。

All the prepared compounds were characterized by 〓H NMR、〓P NMR and elemental analysis. The catalytic activity of each prepared chiral phosphorus compound in the borane reduction of prochiral ketones was studied.

对每一种手性磷化合物，考察了其作为配体催化剂在潜手性酮的不对称硼烷还原反应中的催化效果，讨论了影响不对称诱导的各种因素。

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。