十八酸

Since 1980s, for solving the problems in purification of high sulfur content natural gas, the separation methods based on the physical principle have been developed abroad, and two methods such as low temperature fractional distillation and membrance separation are successful.

八十年代以来，为解决酸气含量很高的天然气净化问题，国外致力于开发利用物理原理进行分离的方法，已取得成功的有低温分馏和膜分离两种方法。

With polyoxyethylene nonyl phenol ethers (OP-10) as emulsifier and dodecyl benzene sulfonic acid as catalyst, hydroxy organosilicon microemulsion was prepared through octamethylcyclotetrasiloxane (D4) open-ring polymerization under certain conditions.

以壬基酚聚氧乙烯醚(OR-10)作乳化剂，十二烷基苯磺酸为催化剂，通过八甲基环四硅氧烷(D4)开环聚合，在一定条件下合成了端在基聚二甲基硅氧烷微乳液。

In this Ph. D. dissertation, reverse microemulsion method was fully used infabricating and modifying polyacrylamide with functional and high-relative moleculeweight. The copolymerization of 2-acrylamide-2-methylpxopanesulfonic acid, fluorescent monomer 4-methoxy-N-(2-N\', N\'-dimethylamino ethyl)naphthalimide alkyl chloride quaternary ammonium salt, fluorescentmonomer 4-(N\'-methyl-1-piperazinylallyl)-N-butyl-naphthalimide chloride quaternaryammonium salt, Cationic monomer dimethylethylammonium bromide and hydrophobical monomer octadecylacrylate with acrylamide and properties of the copolymers werestudied. The interaction between five polymers and Al_2O_3(012) crystal surface have beensimulated by Materials Studio 3.0 program package, binding energies and non-bondinteraction energies and deformation energies have also been acquired.

本文以制备具有较高相对分子质量和功能型PAM为研究目的，将反相微乳液法运用到其制备及改性的有关环节，通过反相微乳液聚合工艺，将几种改性功能单体2-丙烯酰胺基-2-甲基-丙磺酸、荧光单体2-(4-甲氧基-1，8-萘二甲酰亚胺基)-乙基二甲基烯丙基氯化铵、荧光单体4-(N'-甲基-1-哌嗪基)-N-丁基-1，8-萘烯丙氯季铵盐、阳离子单体丙烯酰氧乙基-二甲基-乙基溴化铵和疏水单体丙烯酸十八酯与AM共聚，制备AMPS改性PAM、荧光示踪型PAM、阳离子单体DMB改性PAM和OA改性PAM等四类不同功能单体改性PAM，并研究其应用性能。

By means of molecular designing, a series of sodium branched-alkyl benzene sulfonates weresynthesized through seven process, involving Frieded-Crafts reaction, Grignard reaction, sulfonationand neutralization. Those isomers have similar structure, carbons of same quantity, but the position ofalkylaryl dissimilarity. Liner fat acid, metaxylene and halogenated hydrocarbon of different carbonnumber were used as the starting materials. Optimum processing condition was confirmed consideringinfluence of a series of reaction factors such as feed proportioning, quantity of catalysts, quantitysolvent, reaction time, temperature and pressure. Eight kinds of isomers of sodium hexadecylxylolsulfonates were finally synthesized, and characterized by FT-IR.

本文通过分子设计，以不同碳数直链脂肪酸、间二甲苯以及不同碳数的卤代烷为原料，经酰基化、格氏反应、加氢还原、磺化及中和等反应，合成了结构相似、烷烃链碳数一定、芳基在烷烃链不同位置的烷基芳基磺酸盐同分异构体；并考察了原料配比、催化剂用量、反应时间、反应温度、溶剂用量、反应压力等一系列因素对各反应的影响，进而确定最佳工艺条件，最终合成出十六烷基二甲苯磺酸钠的八种同分异构体，利用 FT-IR 对产物结构进行了分析。

Jasmonates ; rice ; sorghum ; orchard-grass ; floret opening ; regulation of flowering time ; OPC homologous series ; octadecanoic pathway

国家自然科学基金；国家留学基金茉莉酸类；水稻：高粱：果园草；颖花开放；花时调控； OPC同系物；十八碳途径

Ingredient: Hyaluronic acid, pearl powder, octadecyl alcohol, VE and etc.

主要成分：透明质酸、珍珠粉、十八醇、VE等。

The reaction of inulin with octadecyl isocyanates resulted in carbamoylated inulins from which the interfacial properties were determined.

菊糖与十八烷基异氰酸酯在有机溶剂中发生甲氨酰化反应，生成的氨甲基菊糖具有表面活性。

By chemical and spectroscopic analysis , the five compounds were identified as isosakuranetin , 4′,7-dimethylkaempferol, eriodictyol-7-methylether, Rhamnetin, daucostorol .

采用气相色谱-质谱联用技术，对有效部位B进行分析，鉴定出34种化合物，主要为不饱和脂肪酸类和萜烯类成分，其中9，12-十八碳二烯酸乙酯的含量最大。

Adopt SN and ASA2 be antistatic agent, studied an impact of two kinds antistat agent over polyethylene foam material volume electric resistance..

采用十八烷基二甲基羟乙基季铵硝酸盐和硬酯酸单甘油脂混合物作为抗静电剂，研究了两种抗静电剂对聚乙烯泡沫材料体积电阻的影响。

The result of the study indicates that combining 40% sallower seed oil with 59% mixture of octadecadienoic acid and elaeosteric acid is the best compatibility of medicine to compare with high blood fat group.

试验结果证实了基础药效学研究的有效性，40%红花油与59%混合十八碳二、三烯酸及1%的维生素E组成的配方降血脂效果最好。

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。