阳离子

The structures of the isomers were assigned by using 2D NMR techniques such as gCOSY. Comparing to the eluates from the chromatographic column, the first band contains the m2, the second band contains the ml.

利用一维及二维核磁共振(2D NMR)技术，结合三元胺中吡啶环的磁屏蔽效应，对两个异构体在溶液中的结构进行了解析，对应于Dowex 50Wx 2柱色层分离的第一包带的H离子为n2(cmen的2位胺基与Cl处于邻位)：第二色带的阳离子为ml。

Sm and Nd are separated and purified by using HIBA as an eluent through a very small volume of cation-exchange resin

该方法选用AG50W×8阳离子交换树脂，并先后采用不同的淋洗剂进行分离提纯。

In this thesis, the solution of Chinese reference materials including lithium, potassium, calcium, sodium, magnesium, was used to evaluate analytical methods applied. Lithium was enriched in different eluents (hydrochloric acid, nitric acid and mixture with ethanol or methanol) by cation exchange resin AG 50W-X8, and the optional experimental conditions were studied.

本文以锂元素标准样品和钾、钠、钙、镁元素标准样品的混合溶液为主要研究对象，采用阳离子交换树脂AG-50W-X8来分离富集锂，探索在不同淋洗介质(包括盐酸、硝酸以及与甲醇、乙醇的混合)条件下锂分离纯化的最佳介质条件。

Aminobutyric acid in tea was extracted, isolated and determined. Water achieve a better effect than ethanol in extracting γ-aminobutyric acid, and γ-aminobutyric acid content was enhanced by 20%; 732 positive ion resin columns (2.5×50cm) was used to isolate, citric acid and ammonia water were used as elutes, based on pH linear gradient. Results indicated that γ-aminobutyric acid inelute could reach 39%; thin layer scanner could measure the content of γ-aminobutyric acid.

对茶叶中γ-氨基丁酸的提取、分离及检测方法进行了研究，分别采用水和乙醇作为提取溶剂，结果发现用水提取能达到更好的效果，γ-氨基丁酸含量提高20％；同时采用离子交换树脂对γ-氨基丁酸提取液进行分离，提取液上732阳离子树脂柱(2.5 ×50cm)，使用柠檬酸和氨水缓冲液进行pH线性梯度洗脱，洗脱液中γ-氨基丁酸最高浓度达39％；采用薄层扫描仪对γ-氨基丁酸的含量进行检测，研究并确定了检测的条件及参数。

Contrarily, cationic surfactant CTAB and nonionic surfactant_9 have the same effects: the two substances\' enterings cause the superficial enzymatic activity to decrease rather than the total loss in whatever the buffers. There is no Soret movements except that a longer wavelength movement by_9\'s treatment under pH5.2 buffer condition.

阳离子表活剂CTAB和非离子型表活剂9的作用结果类似：无论SBP带何种净电荷，两类物质的加入使得表观酶活力降低但不是完全失去：紫外-可见电子吸收光谱上特征Soret带位移保持不变；只是9在pH5.2缓冲液中Soret带发生红移。

Aim To explore the role of serum eosinophil cationic protein in the diagnosis, monitoring and curative effect assessment of asthma.

目的探讨检测血清嗜酸细胞阳离子蛋白在支气管哮喘的诊断、病情监测及疗效判断中的价值。

Aim To explore the role of serum eosinophil cationic protein in the diagnosis, monitoring and curative effect assessment of asthma.

摘要ˇ目的探讨检测血清嗜酸细胞阳离子蛋白在支气管ˇ喘的诊断、病情监测及疗效判断中的价值。

A disadvantage that has prohibited cationic epoxies from more uses in wood coating is their sensitivity to humidity and the fact that some woods are alkaline in nature.

阻碍阳离子环氧树脂在木材涂料当中应用的是因为它们对水分很敏感，以及一些天然的木材是碱性的。

Vinyl ethers in combination with cationic epoxies cure extremely fast, producing very hard, high-gloss coatings.

乙烯醚同阳离子环氧树脂组合后，固化特别快，形成非常坚硬，高光泽的涂层。

The thermal post cure reaction of cationic epoxies can be useful in a beverage can line, but is a major disadvantage in wood coating lines.

阳离子环氧树脂的放热反应在饮料罐生产线中有益，但在木制品涂饰生产线中却有害。

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。