查询词典 polymer

A cinchonine imprinted monolithic polymer was directly prepared in a fused capillary column by in-situ polymerization.

借助于提高流速和使用梯度洗脱在其上实现了快速手性分离。

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

To improve the accuracy, as to the hardware, the quality of composite polymer films and adjustment of light path were controlled strictly, including cleanout of base, synthesis of solvent, filtering of solvent, preparation of the films and control of picturing. As to the process of picturing, adding gauge, foreground and background, many exposals in same angle were used, and the area of the films to measure was also chosen. As to software, picture analysis was mainly used to improve accuracy.

为了提高测量精度，在硬件方面严格控制复合聚合物薄膜的质量和光路的调整，包括：基片的清洗、溶液的配制、溶液的过滤、薄膜的制备、和摄像的控制等等，在采集图像的过程中，通过加标尺、测量前景和背景、同一角度下的多次曝光、薄膜测量区域的选择等等措施来消除误差；在软件方面提高测量精度方法主要采用图像处理的方法，并用自编的软件处理数据。

The effects of the composition of microemulsion, the concentration of polymer and the condition of complex coacervation on the characteristics of nanocapsules were investigated.

考察了微乳液的组成、高分子的浓度和复凝聚的条件对纳米胶囊性质的影响。

Nanocapsules were synthesized in O/W microemulsion by complex coacervation with natural polymer of arabic gum and gelatin.

在O/W型APG微乳液模板上，以明胶和阿拉伯树胶作为包裹材料，用复凝聚的方法制备纳米胶囊，对影响纳米胶囊的合成条件进行了分析。

The interactions of globular proteins with oppositely charged polymers can form soluble complexes, coagula, or precipitates, depending on the concentrations of protein and polymer, pH and ionic strength of aqueous solution.

论文工作的第三部分研究了在与马来酸—烯烃交替共聚物结合和解离过程中细胞色素c结构的可逆转换。

As references, conventional surfactant sodium dodecylsulfate or the mixture of surfactants sodium dodecylsulfate and nonylphenol polyoxyethylene ether (10) is used in the same polymer systems. Large amount of coagulum is producted during the polymerization, when the polymerizable surfactant from series A is used.

传统乳化剂十二烷基硫酸钠或十二烷基硫酸钠与壬基酚聚氧乙烯醚(10)(NP-10)复配的乳化剂也同样用于聚合以作对比。A系列乳化剂产品产生了大量凝胶，不适宜用于本文研究的乳液聚合中。

The results indicate viscosity coefficient of polymer emulsion

结果表明，乳液的粘性系数随固相材料密度的增大而变小；当固相颗粒数增多或颗粒半径增大时，粘性系数也随之增大。

The results indicate viscosity coefficient of polymer emulsion reduce as the density of granule increases, and augment as the number or the radius of granules increase .

结果表明，乳液的粘性系数随固相材料密度的增大而变小；当固相颗粒数增多或颗粒半径增大时，粘性系数也随之增大。

However, in this paper MesoDyn simulation is used to study interactions between polysaccharide and surfactant. A new and simple approach for studying such a system is found. This study enlarges the application of MesoDyn method in colloid chemistry and provides a new idea for investigating interactions between other type of polymer and surfactant.2. The second novelty of this dissertation is mesoscopic simulation and experiments are combined to study physicochemical properties of system.

文献报道的MesoDyn模拟主要用来研究嵌段共聚物或两种聚合物混合体系的性质，而本文首次利用MesoDyn模拟方法研究了聚合物和表面活性剂之间的相互作用，建立了研究这一体系的简易而有效的新途径，从而大大增强了MesoDyn方法在胶体化学中应用的可行性；同时，有助于人们进一步了解MesoDyn方法，并为用其研究其它类型的聚合物与表面活性剂之间的相互作用提供了良好的思路。2。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。