丙烯酰

Covalent modification of four isolated alkannin derivatives (alkannin, acetylalkannin,β,β dimethylacrylalkannin and β acetoxyisovalerylalkannin, respectively) on rabbit muscle latate dehydrogenase and yeast Alcohol Dehydrogenase has been studied.

为研究紫草萘醌类化合物的细胞毒性作用机制，从新疆软紫草根中分离出四种紫草萘醌类化合物β，β二甲基丙烯酰阿卡宁(1)，乙酰阿卡宁(2 )，β乙酰氧基异戊酰阿卡宁(3)和阿卡宁(4)。

What's more, we measure the inhibition rate of calcium carbonate and conglutination of the polymaths.

以丙烯酸、顺丁烯二酸酐和丙烯酰胺为原料，过硫酸钾为引发剂，在不同的条件下进行自由基聚合反应，生成不同分子量的共聚物，并测定了这些共聚物的粘度和对碳酸钙的阻垢率。

To develop an eco-friendly epoxy impregnating resin system for groundwall insulation of large generators, the curing reaction mechanism has been fully studied, the formulation and the curing techniques have been optimized, and the influence of different constitution on the curing reaction, microstructure, and final performances have been studied and characterized.In this paper, influences of different reactive organo-siloxanes on the curing reaction and performances of epoxy V.P.I.

本文研究比较了含有环氧基、氨基或乙烯基的反应性硅氧烷，包括：γ-缩水甘油醚氧丙基甲基二乙氧基硅烷、β-(3，4环氧环已基)乙基三乙氧基硅烷、γ-缩水甘油醚氧丙基三甲氧基硅、β-(3，4环氧环已基)乙基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷、乙烯基三乙氧基硅烷和苯胺甲基三乙氧基硅烷对环氧V.P.I。

In this paper the emulsion of polyacrylamide was synthesized in the polyglycol solutions, acryl amide and acrylic acid sodium was used as the monomer. In more detail, we investigated the effect of the concentration of the monomers, the ratio of monomer and PEG, the ratio of monomers, temperature, and emulsifier on the stability of the HPAM emulsion and the molecular weight of the HPAM.

为了提高聚丙烯酰胺相对分子质量，以丙烯酰胺与丙烯酸钠为原料，在聚乙二醇水溶液中合成了聚丙烯酰胺水包水乳液，考察了初始单体质量分数、共聚单体与聚乙二醇摩尔比、共聚单体摩尔比、聚合反应温度、乳化剂种类及其浓度对HPAM水包水乳液稳定性及相对分子质量的影响，所得共聚产物相对分子质量可达1.5×10^7。

In addition to cyclopropanation, the typical Diels-Alder reaction between cyclopentadiene and N-acryloyl-l,3-oxazolidinine-2-one with Ll-L8/metal complexes have also been studied.

对于新配体在Diels-Alder反应中的对映选择性的研究，我们采用环戊二烯与3-丙烯酰基-2-噁唑啉酮的反应。

The paint includes liquid A, which consists of acrylic resin, mixed solvent of xylene, acetone and isophorone, organic silicone solution, superfine silica powder, titanium dioxide powder, methyl-(N-beta-amino ethyl gamma-amino propyl)-dimethoxy siloxane solution, gamma-methyl acrylyloxy propyl tromethoxy siloxane solution and fluorocarbon modified siloxane; and liquid B, which consists of hexamethylene diisocyanate, polydiisocyanate, xylene, and methoxy propyl acetate. When the paint is used, two components are mixed together.

由丙烯酸树脂、二甲苯和丙酮及异佛尔酮混合溶剂、有机硅酮溶液、超细二氧化硅粉、钛白粉、甲基(N-β-氨乙基γ-氨丙基)二甲氧基硅烷溶液、γ-甲基丙烯酰氧基丙基三甲氧基硅烷溶液、氟碳改性硅氧烷溶液组成A液，由六亚甲基二异氰酸酯聚异氰酸酯、二甲苯和甲氧基乙酸丙酯混合溶液组成B液，使用时将两组分混合。

In this paper,the monomers including St and BA with strong waterproof property were employed to modify the traditional PVAc emulsion,and meanwhile draw into DAAM functional monomer in the copolymer system,will prepare out cross linking copolymer emulsion for ADH to improve the waterproof,oilproof and dry/wet mechanical property of fuel oil filter paper.

采用具有较强抗水性的苯乙烯、丙烯酸丁酯等单体对传统聚醋酸乙烯酯乳液进行共聚改性，并在共聚体系中引入双丙酮丙烯酰胺功能单体，制备出可通过外加己二酸二酰肼交联的外交联醋丙共聚乳液，以期提高燃油滤纸的耐水、耐油性和干湿态的力学性能。

N-propyl-4-(N-methylacryloxy-ethyl)amino-1,8-naphthalimide was synthesized and used for determination of picric acid.

合成了N-丙基-4-(N-甲基丙烯酰基氧乙基)氨基-1，8-萘酰亚胺，研制出了苦味酸荧光光纤传感器，可间接测定药片中磷酸氯喹和水样中苦味酸的含量。

Using tetrabutyl titanate and methyl methacrylateor 2-Hydroxyethylmethacrylate (HEMA as materials, methacryloxylpropyl trimethoxy siliane as coupling agent, HCl as catalyst, Poly-titania（PMMA－TiO2） nanocomposites and Poly-titania（PMMA－TiO2） nanocomposites were synthesized by sol-gel process.

以盐酸作为催化剂，将钛酸四丁酯水解制备二氧化钛（TiO2）溶胶；随后将所制备溶胶与甲基丙烯酸甲酯、硅烷偶联剂（γ－甲基丙烯酰氧丙基三甲氧基硅烷）相混合，以过氧化苯甲酰作为引发剂，经过聚合、缩合和溶胶-凝胶过程，制备了均匀透明的PMMA-TiO2纳米复合材料和PHEMA－TiO2纳米复合材料。

In this article, the factors that affect molecular weight and solubility of polyacrylamide are studied and suitable initiator system is selected. The optimum parameters of copolymerizing process are obtained as follows: the molar proportion of acrylamide and sodium acrylate is 7:3, the monomer concentration is 30%, pH value of solution is 12, the oxidizer (K2S2O8) concentration is 0.1%, the reducing agent (NH2CONH2) concentration is 1%, the chain-transfer agent concentration is 0.4%. The initial reaction temperature is 35℃.

讨论了影响聚丙烯酰胺分子量和溶解性能的因素，选取了合适的氧化-还原引发体系，确定了制备超高分子量速溶型部分水解聚丙烯酰胺的优化聚合工艺参数：起始共聚合反应温度为35℃，保持在密闭条件下的共聚合反应2.5h后，再将聚合反应温度升高到55℃，继续反应2h，反应结束；反应溶液单体总浓度：30％，共聚合反应溶液pH值：12，氧化剂K_2S_2O_8：0.1％，还原剂NH_2CONH_2：1％，共聚合反应中两种单体的投料比：丙烯酰胺：丙烯酸钠=7：3，异丙醇链转移剂：0.4％。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。