查询词典 crystallography

In the second part, the structure of agglutinin from Abrus precatorius has been determined by X-ray crystallography. The structure and the activity as a ribosome-inactivating protein have been compared with abrin-a from Abrus precatorius.

第二部份是以X光结晶学的方法，决定鸡母珠凝集素(Agglutinin from Abrus precatorius)的单晶结构，描述其与鸡母珠毒素(Abrin-a from Abrus precatorius)结构上的差异，并试图由此分析两者作为醣体抑制蛋白在活性上的差异。

This thesis includes five parts as follows.1. The backgrounds and some relative concepts of this work are briefly introduced. The photochemistry of benzamides and compounds with thiourea functional group is also concisely reviewed.2. Total of fourteen benzamides with different substituted groups have been synthesized and structurally characterized. Better photoreaction time for that kind of compounds at given concentrations is confirmed by tracking its'UV spectrum and GC chromatogram. A representative dibenzophenone photoproduct has been determined by X-ray crystallography. The mechanisms of photoreaction of benzamide have been proposed.3. Total of seven N-chloro(phenylmethylenebenzenamines with different substituted groups and sixty-one thiourea derivatives have been synthesized and structurally characterized.

论文的主要内容如下：1、简要介绍本论文工作的研究背景，并对苯甲酰胺和具有硫脲官能团类化合物的光化学研究进展进行简要的总结。2、合成与表征了14个具有不同取代基的苯甲酰胺类化合物，利用紫外光谱和气相色谱确定了此类化合物较佳光照时间，测定了一个具有代表性光解产物的单晶结构，提出了苯甲酰胺类化合物的光反应机理。3、合成与表征了7个带有不同取代基的氯代苯甲酰亚胺中间体及61个硫脲衍生物，测定了两个具有代表性化合物的单晶结构。

The struture of compound 12 was determined by X-ray crystallography analysis. The molecule is centrosymmetric dimer and has a core of Sn-2O-2 unit.

通过对化合物的核磁共振谱、红外光谱、元素分析的研究，确定化合物的组成和结构及形成结构的原因。

It is not known how rare this resemblance is, or whether it is most often seen in inclusions of silicates such as garnet, whose crystallography is generally somewhat similar to that of diamond; but when present, the resemblance is regarded as compelling evidence that the diamonds and inclusions are truly congenetic.

现在尚不知这种类似稀少到何种地步，也不知道是否它最常见于象石榴石一类的硅酸盐内含物中，而这类物质的晶体结构普遍地在某种程度上类似于金刚石的晶体结构。但一旦存在，这种类似就被视作极有说服力的证据，证明金刚石与内含物确是同源的。

The structures of drug-target complexes obtained by X-ray crystallography provide direct and convictive evidences for drug design.

利用晶体X射线衍射的方法获得药物与靶标复合物的结构，为药物设计提供最直接有力的依据。

Treatment of dials with N-tert-butanesulfinamide, all biaryl dials were successfully converted into the corresponding bis-imines which were then treated with samarium diiodide to afford diamine products. The absolute configurations of all the intramolecular coupling products were determined by X-ray crystallography.

轴手性二醛与N-叔丁基亚磺酰胺缩合得到相应的亚胺，其为一对非对映异构体。N-叔丁基亚磺酰亚胺在二碘化钐条件下得到的偶联产物，经X-衍射也确定了其立体构型。

So, crystallography and mineralogy is the esssential knowledge of scientific and technological staffs, teachers and students of related field, who will be engaged in geology and materials science, geotechnics and environmental engineering.

所以，结晶学与矿物学是从事地质学、材料学、岩土工程与环境工程的科技人员和相关专业的广大师生必备的知识。

On the basis of molecular design and assembly, the polyoxometalate compounds supported by Keggin, Dawson, lacunary Keggin, and Silverton-type etc. polyanions on the basis of well-known and novel polyanions as building blocks were successfully synthesized by the hydrothermal technique, which are"decorated"or"bridged"by organic N-donor and/or O-donor ligands. The study on synthetic conditions and rules for these hybrid compounds and characterization by X-ray crystallography, spectroscopic, thermal, electrochemical and magnetic properties are carried out.

本文主要利用水热合成方法，从分子设计及组装的思想出发，借助不同N和含O的有机配体对多金属氧酸盐阴离子结构进行&修饰&或&桥连&，合成了一些以饱和Keggin结构、饱和Dawson结构、缺位Keggin结构和Silverton结构等阴离子为构筑模块的多金属氧酸盐化合物，研究了这些化合物的合成条件及规律并对它们的晶体结构、谱学性质、热性质以及磁性质进行了研究。

The X-ray crystal structure of One of these organotin complexes was determined employing X-ray crystallography.

并利用X-射线四圆衍射确证了其中一个配合物的晶体结构，为更深一步的研究其构效关系及该类化合物在体内的作用机制奠定了一定的基础。

A review of the crystallography, thermodynamics and kinetics of the shape memory effect is given and the factors affecting the SEM such as, the amout of prestrain, heat treatment history and aging, are briefly introduced.

综述形状记忆效应的晶体学，热力学及动力学，简介影响形状记忆效应的一些因素：预应变量的影响，热处理条件的影响以及时效的影响。

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。