查询词典 cation-active

In this paper,the strong acid cation exchange resin has been studied as the catalyst for the esterification of gulonic acid .

选用强酸性阳离子交换树脂代替浓硫酸催化剂，对古龙酸的甲酯化反应进行了探索性研究。

Experiments are conducted on the effect of different types and different molecular structures of polymers on HPAM removal existed in solution or sewage. It is found out that only cationic polymer has a better removal effect of HPAM among the non-ion, amphoteric ion and hydrophobical cation polymers, especially the DMDAAC cationic polymer has an optimal result. The removal capacity to HPAM can be further improved by using appropriate molecular weight and cationic capacity and gas floatation technique.

试验研究了不同类别及分子结构的聚合物对溶液或污水中HPAM的去除效果，发现非离子、两性离子、疏水改性阳离子聚合物对HPAM无去除作用，只有阳离子聚合物去除效果较好，其中尤以DMDAAC系列阳离子聚合物效果最优，而适当的分子量和阳离子化度以及气浮技术均可以进一步提高其对HPAM的去除率。

The intercalation of the HDTMA cation increased the interlamellar distances from 13.2A (Na-bentonite) to 17.9A (HDTMA-bentonite).

大的基础的间隔（d001）HDTMA的—斑脱土相应bilayers在哪个长的形成—装链的。

The intercalation of the HDTMA cation increased the interlamellar distances from 13.2A (Na-bentonite) to 17.9A (HDTMA-bentonite).

HDTMA 阳离子的置闰增加了从 13.2A到 17.9A 的瓣间的距离。

To enhance the reliability of narrow band PLC over low-voltage networks, a Power Line Communi- cation routering reconstruction method on basis of irreciprocal clustering algorithm is proposed and thoroughly discussed in the paper.

为提高低压配电网窄带电力线载波通信系统可靠性，提出并讨论一种基于非交叠分簇算法的电力线通信组网及路由重构方法。

Firstly by using volume exclusion chromatography and cation exchange column,sugar molecular-weight distribution and the contents of monosaccharide, disaccharide andtrisaccharide in rice wine were determined. And then by using amino-bonding phasecolumn,the contents of three functional oligosaccharide (isomaltose, panose, isomaltotriose)in shaoxing rice wine of different years and different processes were determined andstudied.

在应用体积排阻色谱柱和钙型阳离子交换柱测定了黄酒样中糖分的分子量分布和单、双、三糖含量的基础上，利用氨基键合相柱对不同年份和不同工艺的绍兴黄酒样中异麦芽糖、潘糖、异麦芽三糖三种功能性低聚糖进行了定量分析研究。

Because of the impact of precipitation facies and lithogeny, there are many complex reservoirs in Nanpu oil field with characteristics of high bond water saturation, high cation exchange capacity and complex pore structures. The reservoir's electrical parameters are different from that of conventional sandstone reservoir so that we can't use Archie's equation to do reservoir evaluation.

南堡油田第三系受沉积微相和成岩作用的影响发育大量的复杂砂岩储层，束缚水饱和度和阳离子交换量偏高，储层孔隙结构复杂，地层因素和孔隙度表现出非阿尔奇关系的特征。

Tenella sprayed on the litter for the challenge immnnity for more than 50 con- secutive days, while feeding medicated feeds contained each of 4 anticoccidials at various madi- cation programs in 6 groups.

鸡球虫病同许多传染病一样，化疗和疫苗免疫是两个主要的防治措施，在疫苗免疫的某些关键性技术尚未突破之前，目前仍主要靠药物防治。

A new process has been studied to synthesize malonic acid from diethyl malonate through hydrolysis reaction and catalyzing by 732 type cation exchange resin.

用732型阳离子交换树脂催化水解丙二酸二乙酯制取丙二酸，考察了反应温度、反应时间、水与丙二酸二乙酯的质量比、丙二酸二乙酯与树脂质量比等工艺条件对收率的影响。

It has been found that the cation exchange on diffusivity may play the role in different ways for different zeolites. When the diameter of the diffusant molecule is much smaller than the pore or cage size of the zeolite, the influence of exchanged cations is mainly by way of altering the electric field intensity (or the density of electric charge), the large the Z/r of the exchanged cations, the smaller the diffusivity; while the diameter of the molecule is apporsi- mately equal to the pore or channel size of the zeolite, the exchanged cations may affect the diffusivity by means of blocking up or narrowing the channels of the zeolite.

金属阳离子交换对扩散的影响表现为：当扩散分子的直径比分子筛孔道直径小得多时，交换阳离子以改变分子筛内部电场强度或电荷密度的方式影响扩散速度，阳离子的Z/r越大，扩散系数越小；当扩散分子直径与分子筛孔道直径相近时，交换阳离子则因堵塞或窄化孔道而改变分子的扩散速度。

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。