乙烯

Molecularly imprinted polymers of sulfamethazine(SM 2 ) were prepared with silica gel as a sacrificial material, methacrylic acid and 4 vinylpyridine(4 Vp) as functional monomers, glycol dimethacrylate as crosslinker. The polymer properties were investigated by static adsorption experiments. Scatchard analysis shows that the adsorption ability of MAA MIP is superior to that of 4 Vp MIP. The dissociation constant of MAA MIP is 9 59×10 -4 mol/L. The value of apparent binding a...

以磺胺二甲嘧啶为模板分子，分别用甲基丙烯酸和4乙烯基吡啶为功能单体，二甲基丙烯酸乙二醇酯为交联剂，采用牺牲硅胶法合成了磺胺分子印迹聚合物，通过静态吸附实验，系统研究了不同单体对聚合物识别性能的影响；Scatchard分析表明，以甲基丙烯酸为单体的聚合物具有较高的吸附能力，其离解常数Kd为959×10-4mol/L，最大表观结合位点数Qmax为3070μmol/g。

Three methods are used to prepare molecular imprinted polymers,which include conventional bulk technique or polymerization with ultraviolet initiated in low temperature and polymerization with silica-gel as sacrificial materials. In the polymerization procedure , Sulfamethazine(SM2)and Sulfisoxazole were used as target template molecules, methacrylic acid and 4-vinylpyridine(4-VP) and acrylamide were selected as functional monomers, ethylene glycol dimethacrylate as crosslinker, azobisisobutyronitrile was used as initator.

主要工作如下：首先，以磺胺异噁唑和磺胺二甲嘧啶为模板，分别以4-乙烯基吡啶，甲基丙烯酸，丙烯酰胺为功能单体，以二甲基丙烯酸乙二醇酯为交联剂，偶氮二异丁腈为引发剂，采用了传统方法(60℃恒温水浴)、牺牲硅胶法及低温紫外光聚合法等三种方法合成了一系列的磺胺类药物印迹聚合物。

In medical industry,it is used in the production of cephalosporin V, sulfanilamide -6-methoxamine pyrimidine,fluorine pyrimidine.

还作为溶剂、金属防腐剂、环氧树脂固化剂、聚酯的固化促进剂、乙烯类化合物聚合时的助催化剂等。

The invention belongs to the synthesis technical field of pharmaceutical intermediates, and more particularly relates to a preparation method of Cis-4-(2-bromine ethylene) benzene sulfonamide.

本发明属于药物中间体合成技术领域，具体涉及一种顺式-4-(2-溴乙烯基)苯磺酰胺的制备方法。

The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt as photoinitiator.

以二苯基-4-苯硫基代苯基硫鎓盐为光引发剂，研究了乙烯基正丁醚的本体和溶液光聚合。

It discusses the Problems of how to ensure the safety in the running of hydrogen's combustion system and haw to improve heat efficiency of the steam superheater .

介绍了用氢气作为燃料的四氟乙烯装置蒸汽过热炉的设计特点，探讨了设计中如何保证氢气燃烧系统的安全运行以及提高蒸汽过热炉热效率的措施。

The interrelation of PG activity with softness, storability and susceptivity to stimulus from exo-ethylene was discussed.

讨论了PG活性与果实成熟、耐贮性及软化的关系，及对外源乙烯刺激的敏感性。

The measuring principle, design method and configuration of the system are introduced. Then, the measuring system is calibrated by testing Lead Zirconate Titanate ceramic and Lithium Tantalate crystal with the known pyroelectric coefficients as the references. In addition, the pyroelectric coefficients of several common ferroelectric thin films such as PZT, PVDF (poly-vinylidene fluoride) and BST are tested.

介绍了该系统的测量原理、设计方法及组成，用已知热释电系数值的锆钛酸铅陶瓷及钽酸锂单晶作为参考样品对系统进行了调试，并对PZT、聚二氟乙烯及钛酸锶钡等几种常见的铁电薄膜材料的热释电系数进行了测试。

For these compounds, it is necessary to polymerize the intermediate species before tautomerization, eg, at low temperature, eg,-1000C to 1000C, and preferably -100C to 250C, and under anhydrous conditions, to produce vinyl amine polymers.

对于这些化合物，这是必要的聚合中间物种之前，互变异构，例如，在低温下，如- 1000c ，以1000c ，最好是- 100c ，以250c ，并根据无水条件下，生产乙烯胺聚合物。

Experiments showed that addition of Teflon particles can promote heat transfer coefficient by 20%～40%.

实验表明，在浓度 31 %的黑液中加入聚四氟乙烯粒子可提高传热系数2 0 %～ 40 %。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。