单体

Methacryloyloxydecyl-2-thiouracil-5-carboxylate was synthesized from the reaction of thiouracil with diethyl ethoxymethylene malonate and ω-hydroxy-decyl-methacrylate.

以硫脲、乙氧基次甲基丙二酸二乙酯和甲基丙烯酸ω-羟癸酯为主要原料合成了一种新的粘接性单体10-甲基丙烯酰氧癸基－2-硫脲嘧啶－5-羧酸酯。

Different monomers and prepolymers components have great influence on the dispersion properties of pigment and further on the rheological properties and thixotropy of UV curable offset ink.

不同的单体、预聚物结构的差异对颜料粒子的分散状态有较大影响，最终影响油墨样品的流动特性和触变性。

The invention relates to a preparation process for synthesizing polyethylene terephthalate 1, 3- terephthalate catalyst, which comprises adding titanic acid ester, germanium compounds and cobalt compound into liquid dispersed phase of organic solution, wherein the total weight concentration is 4-10%, and preparing the catalyst through mechanical stirring or ultrasonic wave mixed ligand for 10-60 minutes in 0-120 DEG C, wherein the adding content of titanic acid ester, germanium compounds and cobalt compound are respectively 200-500ppm, 50-300ppm and 100-400ppm of reaction monomer mass of terephthalic acid or dimethyl terephthalate.

本发明涉及一种合成聚对苯二甲酸1，3-丙二醇酯催化剂的制备方法，将钛酸酯、锗化合物和钴化合物加入到有机溶剂的液体分散相中，总重量浓度为4～10％，在0-120℃通过机械搅拌或超声波混配10-60min制得；钛酸酯、锗化合物和钴化合物加入量分别是对苯二甲酸或对苯二甲酸二甲酯反应单体质量的200-500ppm、50-300ppm、100-400ppm；用此催化剂制备PTT产品，酯化和缩聚反应时间相对于单独使用钛酸四丁酯缩短了30-60min，产品特性粘数0.70-1.05dL/g，色相b值在2-6之间，切片可用于加工新型合成纤维及工程塑料产品。

With the acid and alkali titrate method,we got the mean molecular weight and discussed the monomer density,the initiator amount used, chain transfer agent factor as well as reaction temperature to molecular weight influence tendency and d.

聚丙烯酸钠在很多领域的广泛应用，我们采用水溶液聚合法中的中和法合成低分子量聚丙烯酸钠，用酸碱滴定的方法测得聚丙烯酸的平均分子量，并探讨了单体浓度、引发剂用量、链转移剂用量以及反应温度等因素对聚丙烯酸钠分子量的影响趋势和程度。

Dynamic response of direct methanol fuel cell is very important for the transportable applications.

直接甲醇燃料电池用作移动电源时，电池的动态响应特性特别重要。该文作者利用自行设计的直接甲醇燃料电池测试系统对一有效面积为 50cm2 的直接甲醇单体燃料电池的动态性能进行了实验研究。

Sowing fertilization monomer form of installations, and round configuration of the increase in broadcast rear rack can be planted to ensure that the land side; the use of knife-type trencher stubble breaking, and buried a small resistance, with stubble in the soil is not cultivated to the same place deep application of fertilizer and sowing operations.

播种施肥装置采用单体形式，地轮配置在播幅之内机架后方，能保证播种到地边；采用刀式破茬开沟器，入土阻力小，能在带麦茬未耕土壤里进行同位深施肥和播种作业。

Effects of artificial reefs and their compounds on flow field have been studied through wind tunnel experiments under conditions of 6 m/s, 9 m/s and 12 m/s, on such single AR models with different shapes of cube, pyramid and triangular prism.

中文摘要：针对正方体、金字塔及三棱柱人工鱼礁模型，选取3个不同工况6 m/s、9 m/s和12 m/s，通过风洞实验研究不同类型人工鱼礁单体和不同组合正方体模型的流场效应。

After a short reaction time most of the monomer will have disappeared and the reaction system will contain a mixture of dimer, trimer and other low polymers

经过短时间反应后，大多数单体消失，反应体系将是含有二聚体，三聚体和其他低聚物的混合物。

HSBP1 interact with the trimer formation of HSF1 to convert the HSF1 from its active trimer state to inert monomer state.

HSF1 在无活性的单体及有活性的三聚体之间的转变和平衡是转录调控的关键。

The effect of modification between BR monomer and trimer is similar, photovoltage and photocurrent intensities of Q-CdS are increased by 5 times and 1 time individually.

BR对Q-CdS薄膜表面修饰后，可大大增强Q-CdS的光电响应，BR单体与三聚体的修饰作用相似，光电压强度增加5倍，光电流增加1倍以上。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐