烯基

In this paper the surface charge density of cationic kraft pulp was chosen as response variable and the preparation conditions of cationic kraft pulp by the in-situ grafting copolymeration of acrylamide and cationic monomer, [2- ethyl] trimethyl-ammonium chloride were optimized by central composite design.

摘 要：以阳离子硫酸盐浆的表面电荷密度为评价指标，采用中心复合设计法对丙烯酰胺和甲基丙烯酰氧基乙基三甲基氯化铵接枝共聚制备阳离子硫酸盐浆的工艺进行了优化。

The copolymerization compound comprises based on a proportioning ratio by weight: 25-99 percent ethylene aromatic series monomer; 0-30 percent olefinic undersaturation nitrile monomer; 1-50 percent olefinic dibasic acid ramification monomer.

这种共聚组合物按重量百分比包含：25至99％的乙烯基芳香族单体；0至30％的烯属不饱和腈类单体；1至50％的烯属二元酸衍生物单体。

The hydrophobically associating interactions of the copolymer PASA with acrylamide, styrene derivative and sodium-2-acrylarnido-2-methylpropane sulphonate in aqueous solution were studied by flourescent probe.

通过荧光探针研究了丙烯酰胺-苯乙烯衍生物-2-甲基－2-丙烯酰胺基丙磺酸钠共聚物在溶液中的疏水缔合作用。

The main contents were Alcohol,-2-Hexen-1-ol, 3-t-Butyl-oct-6-en-1-ol, Benzyl Alcohol.25 compounds were identified in Hongbaoshi, representing 62.65% of the total peak area, and 25 kinds were in sole possession for it. The main contents were Alcohol,-2-Hexen-1-ol, 3-t-Butyl-oct-6-en-1-ol, Hexyl acetate.

从砧木为'吉塞拉'的'红宝石'大樱桃果实中共检测出25种香气成分，占总峰面积的62.65%，其中21为其独有，相对含量较高的是乙醇、2-己烯－1-醇、3-异丁基－6-烯－1-辛醇和乙酸己酯。

According to the properties of acrylic acid series polymer of scale inhibition. A kind of amphiprotic tercopolymer of acrylic acid, acrylamide and dimethyldiallylammonium chloride is synthesised, with water as solvent, persulfate and hypophosphate as initiator. Through the tests, the copolymer can show the good scale inhibiting effect and bactericidal action, and become a multifunctional scale inhibition.

本研究根据丙烯酸聚合物阻垢剂的特点，使用过硫酸铵(NH_4_2S_2O_8、次亚磷酸钠(Na_2PO_3)构成的氧化——还原型引发剂，水为溶剂，合成了新型可用于处理工业循环冷却水的丙烯酸—丙烯酰胺—二甲基二烯丙基氯化铵两性型三元共聚物。

The molybdenum-based multiphasic oxide catalysts were prepared and tested in the selective oxidation of isobutylene to methacrolein reaction.

研究了添加不同助剂对钼基复合氧化物催化剂对异丁烯选择性氧化制备甲基丙烯醛反应的影响。

Therefore, studies on the synthesis and the applications ofα-alkenoyl ketene dithioacetals should be a valuable research project.

因此，α-烯酰基二硫缩烯酮的合成及其在合成中的应用研究是一重要的研究课题。

Based on our early work, we will discuss the coupling the Nazarov cyclization-halogenation reaction ofα-alkenoyl ketene dithioacetals under Vilsmeier conditions.

基于以上的研究，本文着重讨论了(来源：ABacC论文cece网www.abclunwen.com)α-烯酰基二硫缩烯酮在Vilsmeier试剂作用下的Nazarov环合反应。

No reactions were observed for reactions of benzodiazepines with ketene atroom temperature; but the reaction of benzothiazepines with monochloroketene gave[2+2] cycloadducts .

发现在室温下苯甲酰基苯并二氮杂卓与烯酮没有反应，而苯并硫氮杂卓与一氯烯酮形成了正常的β-内酰胺环产物。

Pyrene has been used as a fluorescence probe to investigate the associative behaviors of hydrophobically modified water-soluble terpolymers Poly(acrylamide/sodium acrylate/octylacrylamide) \[P(AM/NaAA/C_8AM)\].

采用胶束共聚共水解方法合成疏水改性水溶性聚合物聚(丙烯酰胺/丙烯酸钠/N 辛基丙烯酰胺)[P(AM/NaAA/C8AM)]，并以芘为荧光探针，应用稳态荧光光谱法研究了它的疏水缔合行为。

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