阳离子

The invention relates to a method for making oligomeric isocyanates by reacting diisocyanates in the presence of a catalyst, wherein the catalyst comprises a saline compound prepared from an anion selected from 1,2,3- or 1,2,4-triazole, a substituted species of 1,2,3- or 1,2,4-triazole and carbocyclically and/or heterocyclically annellated species of 1,2,3- or 1,2,4-triazole and the cation selected from an alkali metal, alkaline-earth metal and/or monovalent ammonium cation and/or phosphonium cation of formula (5), wherein the E, R1, R2, R3, R4 are as defined in the descriotion.

本发明涉及一种制备低聚异氰酸酯的方法，包括二异氰酸酯在催化剂的存在下进行反应，其中所述催化剂由盐化合物组成，该盐化合物由选自1，2，3-或1，2，4-三唑、1，2，3-或1，2，4-三唑的取代系列者、1，2，4-三唑的碳环稠合系列者、1，2，3-或1，2，4-三唑的杂环稠合系列者的化合物及其混合物的阴离子和选自碱金属、碱土金属和/或通式(5)的一价铵阳离子和/或磷友衾胱拥难衾胱又票福其中E、R 1 、R 2 、R 3 和R 4 如说明书中所定义。

The primary conclusions of the present work are as following first, the charges of membrane sarface effect the rate of protein adsorption, but do not effect the amount of protein ultimately adsorbed second, the nonspecific adsorption of avidin can be detached by adding a suitable amount of bivalent alkaline-earth metal ions; third, the binding of avidin to membrane bound model receptor is astricted remarkable by the latelal steric hindrence.

实验结果表明，膜表面电荷对非特异性吸附的速率有很大的影响，而对最终的蛋白吸附量影响不大；非特异性的吸附可以通过二阶阳离子的脱附而去除；受体蛋白质与配体间的特异性结合受到侧向空间位阻效应的制约。

Compared with other cationization agents with different alkyl, propyl-trimethyl ammonium chloride is a kind of better cationization agent.

与不同烷基的阳离子化试剂相比，GTMA是较好的阳离子试剂。

It is found that quaternary ammonium salt and alkylamine can react with montmorillonite and rectorite via cation exchange reaction and the resulting OMMT and OREC can act as nano-scale filler to PPC materials due to its increasingly swollen gallery spacing.

主要研究结果如下：(1)采用阳离子交换法，制备了不同的有机胺改性的有机蒙脱土和有机累托石，用XRD， FTIR， TGA表征了插层效果。

Montmorillonite has well alterability and its processeing products have fine physicochemical properties which depend on the particularity and the fine cation exchange performance of montmorillonite structure.

蒙脱石具有良好的可改造性，其加工产物具有优良的理化性能，这都取决于蒙脱石结构的特殊性及其优良的阳离子交换性。

Inthe compound, Pr~(3+) cations are eight-coordinated with oxygen atomsfrom six DMSO molecules, two polyanions. The crystal structureindicates that the compound forms a one-dimensional zigzag chain builtfrom the alternating polyanions and cationic units throughW-O_d-Pr-O_d-W links.

结构分析结果表明，化合物中Pr~(3+)离子为八配位，配位氧原子分别来自6个NMP分子和二个杂多阴离子的端氧原子，金属配阳离子与杂多阴离子骨架通过W-O_d-Pr-O_d-W相连。

In this study,The properties of magnesium aluminum hydroxide s were studied through the transmission electron microscope.

以实验室自己合成的氢氧化镁铝胶体作为原料，用透射电子显微镜来观测其性质，并研究其分别与阴离子聚丙烯酰胺和阳离子聚丙烯酰胺组成微粒助留体系对高岭土填料的絮聚作用。

The structure and property of 2,3-epoxypropyltrimethyl ammonium chloride, and the method of synthesizing cationic starch based on ETA and cornstarch are introduced in brief.

对2，3-环氧丙基三甲基氯化铵的结构和性质及以ETA和玉米淀粉为原料合成阳离子淀粉的方法进行了简要介绍。

The structure and property of 2,3 epoxypropyl trimethyl ammonium chloride, and the method of synthesizing cationic starch based on ETA and cornstarch are introduced in brief.

对 2 ，3 环氧丙基三甲基氯化铵的结构和性质及以ETA和玉米淀粉为原料合成阳离子淀粉的方法进行了简要介绍。

This paper deals emphatically with the genetic mineralogical characteristics of amphibole, an important rock-forming mineral extensively-distributed in ophiolites of Shangnan-Danfeng are...

本文着重论述了商丹地区蛇绿岩中广泛分布的主要造岩矿物之一，角闪石的主要特征组份、微量元素、晶胞参数、阳离子占位度等成因矿物学特点。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。