中心体

1 To mimic the active centers of tyrosinate iron enzymes whichcontain phenolate donors, new tripodal ligand, N-(2-hydroxybenzyl)-N, N-bis(2-benzimidazolymethyl) aminewhich contain imidazoleand phendate groups were designed and synthesized and its iron com-plexes 〓(2)(where Mim=N-Methylimidazole) and Fe 〓(3) were prepared andcharacterized by various spectroscopic methods.

1.1 为了模拟酪酸铁酶活性中心，设计并合成了含有酚羟基和苯骈咪唑基四齿配体N，N-(2-羟基苯)-N，N-二氨，并合成它的铁配合物：Fe〓、Fe〓〓(2)和Fe〓，并经各种谱学手段表征了这些铁配合物。

In the Ptolemaic system of planetary motion the earth is fixed as the center of the universe with the sun and moon and planets revolving around it.

在托勒密的行星运动体系里，地球是固定的，是宇宙的中心，太阳、月亮和其他行星都绕着地球转。

Summary of Background Data. Current concepts of spinal sagittal balance center on the C7 plumb line.

背景概要：当前的研究表明，椎体矢状平衡中心存在于C7垂直线上。

Fengshui is the Chinese traditional landscape evaluation system which can be used to avoid evil and chase propitiousness.

风火是中国现代躲吉趋凶的景观评估体系，作为西方文化特有的念维方法，不仅体当初乡市、农村、住宅等的选址和规划布局中，而且浸透、积淀为中国人口理层点下的审美文化与向和世代相传的风气习惯，监控中国期货保证金监控中心。

The integrated analytical results show that the novel ligand coexists in ketoform and enolform structures under the measuring conditions, the ketoform structure may change into the enolform structure during the coordination and bonds with the central ion by two O atoms of the enolized hydroxyl group of pyrazolone ring and H2O and the N atom of the imine group and the N atom containing H of benzimidazole ring by losing the proton. And the coordination number of these complexes is four.

综合各种分析结果显示：配体在测试条件下以酮式和烯醇式结构共存，配位时酮式可能转化为烯醇式结构，按去质子的方式以吡唑啉酮环羟基和H2O上的两个O原子以及亚胺基上的N原子和苯并咪唑环上的含氢N原子与中心离子成键，配合物的配位数为4。

Electrical stimulation of the raphe nuclei , amygdala , or some areas of the hypothalamus can elicit defensive behaviors.

两半对称体的类扁桃体中心杏仁核受到电刺激使一些下视丘区域引起自卫行为。

It may be due to the following two reasons: 1 High steric hindrance caused by rigid structure of substituted fluorenone preventsthe approach of the chiral reductor;2 The prochiral center is, moreover, linked to two coplanar aromatic rings, which due to strong conjugation are highly electronically similar and thus it becomes extremely difficult to distinguish between them.

主要是以下两个原因：1取代芴酮的刚性结构产生高的空间位阻，阻止了手性催化剂的接近；2潜手性中心旁的两个芳香环不仅立体构型非常相似，而且高度的电子相似，很难被手性配体识别。

The behaviors of restrainers of bridges under earthquake were discussed in this thesis. To understand the relative displacement between the superstructure, a shaking table tests of a scale-down simple supported bridge were performed.

中文摘要：本研究计画於国家地震中心以一座双跨缩尺桥梁作震动台实验，观察桥梁加装防落拉杆前后及不同数量、不同尺寸的钢棒及厚度不同之橡胶垫片装设时之差异，针对防落拉杆限制两相邻桥面版相对位移量做研究探讨，并且收集结构分析软体(SAP2000)中所需设定之参数。

In Shanghai Urban Planning Design and Research Institute submitted programme, at the same corner of a strip of similar considerations, the design of a body of a semicircle HKCEC.

在上海市城市规划设计研究院提交的方案中，也在同一地带的东北角作了类似的考虑，设计了一个呈半圆体的会展中心。

The study of the structure and physical properties of silicate melts is the cutting-edge research p...

对于岩浆熔体物理性质和结构以及二者关系的研究是岩石学研究的前沿课题，也是岩浆热力学研究的中心。

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。