簇

This paper is focused on the preparation, characterization of metal clusters and theircatalytic performance in the enantioselective as well as stereoselective hydrogenations. It iscomposed of the five parts as follows: Chapter 1 A review was given on the two most studied enantioselective systems—Ni/TA and Pt/cinchona system, including some recent progress.

本论文研究了铂、铱纳米金属簇在α-酮酯、α-二酮不对称氢化中的催化性能及金属离子在α-二酮立体选择性氢化中的修饰作用，主要分为以下几部分：第一章对多相不对称催化体系一Ni／TA和Pt／cinchona及其一些最新进展作了较系统的评述；同时简要介绍了纳米金属簇的特性及其在催化中的一些应用。

Clump and cluster are set quantifiers that indicate things pile up together and they used in bunch of things.

一、引言"丛"和"簇"都是簇状集合量词，用于丛聚在一起的事物。

In this dissertation, a series of cluster galactosides and cluster mannoside s were synthesized, which target asialoglycoprotein receptor and plant lectin Concanavalin A respectively.

本论文以肝细胞表面受体和植物凝集素Con A为靶点，研究了多价半乳糖簇和甘露糖簇的合成及生物活性。

Cu6Zr5, the basic cluster of the primary devitrification phase of Cu-based amorphous alloys, is selected as cluster model based the on structure heredity existing between amorphous alloys and primary devitrification phases.

根据非晶与其晶化相存在结构遗传关系，以Cu-Zr基非晶晶化相Cu10Zr7中的Cu6Zr5阿基米德反棱柱为团簇模型，利用离散变分方法从电子层次研究了Al元素对Cu基非晶合金团簇稳定性的影响。

Can choose FAT32 and NTFS with the district as a file system volume, and then select the cluster size and volume, the higher disk performance cluster the greater the space but also the greater the waste.

可以选择FAT32和NTFS作为带区卷的文件系统，然后选择簇的大小和卷标，簇越大磁盘性能越高但造成的空间浪费也越大。

For example, hard disk 1gb only sub-district, then the cluster size is 32kb, that is to say, even if a file is only 1 byte long, 32kb storage must also account for the hard disk space, and the remaining space will be where all the idle, so has led to great waste of disk space. greater support fat16 partition, the disk capacity of each cluster is also greater, resulting in greater waste.

例如1gb的硬盘若只分一个区，那么簇的大小是32kb，也就是说，即使一个文件只有1字节长，存储时也要占32kb的硬盘空间，剩余的空间便全部闲置在那里，这样就导致了磁盘空间的极大浪费。fat16支持的分区越大，磁盘上每个簇的容量也越大，造成的浪费也越大。

"Druse:a crust of tiny crystals lining a rock cavity, usually composed of the same minerals that occur in the rock."

"晶簇：嵌于岩石洞穴的小晶簇，一般由与岩石相同的矿物成分组成。"

DRUSE minerals in the rock is fractured by the growth of many minerals or empty single cluster aggregates formed vigilance . They shared one end fixed to the base rock , the other side of freedom and good crystal growth firms .

矿物晶簇是指由生长在岩石的裂隙或空洞中的许多矿物单晶体所组成的簇状集合体，它们一端固定于共同的基地岩石上，另一端自由发育而具有良好的晶行。

This paper introduces especially geologic features of occurred feldspar druses in granite pegmatite veins of rock crystal and of rare metal minerals , and discribes 6 kinds of feldspar druse .

介绍了长石晶簇在含水晶花岗伟晶岩和稀有金属花岗伟晶岩岩脉中产出的地质特征，并对六种长石晶簇

AlN 〓 has the maximal ionization power (9. 14eV) and the minimal electron affinity energy (0.19eV), which manifests that the 〓 is more stable than other clusters, and this conclusions are in good agreement with the experimental results of flight of time mass spectrum .

〓团簇具有最大的电离能（9.14eV）和最小的电子亲和能（0.19eV），表明〓团簇较其它更稳定，从而得到了与飞行时间质谱实验结果相一致的结论。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。