乙基化

For a dye regenerated system composed of eosin ethyl ester iodonium salt (EOEtIPh2) triethylamine, the efficiency of sensitization is 4 times higher than of single system EOEtIPh2, at mean time the number of active radicals is also multiplicated and thus this system is of importance in practical application.

由乙基曙红碘翁盐/三乙胺组成的染料再生体系的染料敏化效率比单一体系高4倍左右，同时使活性自由基的数量增殖，这种体系在实际应用方面具有重要意义。

While the molar ratio of WD-20 and tetraethyl orthosilicate was 0.2, the sol-fraction of the prepared nanocomposites was 6%,glass transition temperature was above 250 ℃ and the transmittance was more than 80% at the wavelength between 450 nm and 800 nm and the size of dispersed SiO2 phase was less than 100 nm.

当WD-20与四乙基原硅酸盐之比为0.2时，所制备的纳米复合材料的溶胶分数为6%、玻璃化转变温度为250 ℃以上、可见光透过率在80％以上、SiO2分散相尺寸小于100 nm。

This investigation was prepared MCM-41 catalyst films on silicon wafer in ammonia media, using tetraethyl orthosilicate as a precursor and cetyltrimethylammonium bromide as a surfactant.

中文摘要本研究以四乙基氧矽溶液为矽酸盐的来源，溴化十六烷基三甲基铵盐为界面活性剂，在氨水的环境下，制备MCM-41触媒薄膜於矽晶片上。

Hydroxyethyl cellulose and tetraethyl orthosilicate are chosen as the stuffs for the reaction, and HEC/SiO2 organic/inorganic hybrid are prepared by Sol-Gel process.

以羟乙基纤维素、正硅酸乙酯为原料，采用溶胶－凝胶技术合成了HEC/SiO2有机－无机杂化材料。

The volatile components were separated and identified using GC-MS technique. RESULTS Seven ingredients were. isolated: 2-ethyl-hexyl-adipate (66.5%), 1-methoxy-4-(1-propenyl)benzene (12.5%), isopropyl isothiocyanate (6%), isobutylisothiocyanate (6%), 6-methyl-5-heptene-2-one (3.5%), benzaldehyde (1.4%), phenylacetaldehyde (0.8%).

结果 分离出7个成分，采用峰面积归一化法确定了各成分的相对含量，分别为66.5%双－2-乙基己基－己二酸、12.5%1-甲氧基－4-（1-丙烯基）苯、6%异硫氰酸异丙酯6%、6%异硫氰酸异丁酯、3.5%6-甲基－5-庚烯－2-酮、1.4%苯甲醛、0.8%苯乙醛。

The related feature of tribromide quaternary ammonium salt as selective bromide reagent was investigated by the reaction of acetophanone, propanone, phenol with self-made benzyl triethyl tribromide quaternary ammonium salt.

首次通过自制的苄基三乙基三溴季铵盐与苯乙酮、丙酮、苯酚等的反应，研究了三溴季铵盐作为选择性溴化剂的相关性能。

The hydrophobic core serves as a reservoir for water-insoluble drugs.Hence,these nanoparticles can be used as carriers for hydrophobic drugs.For the synthesis of cholesterol-modified glycol chitosan conjugates,a carboxyl group was initially introduced to cholesterol molecule using succinic anhydride,and then covalently coupled with the primary amino group of glycol chitosan in the presence of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride and N-hydroxyl succinimide.

本文采用二步反应将胆固醇接枝到乙二醇壳聚糖，首先将胆固醇进行羧基化，将胆固醇与琥珀酸酐反应生成胆固醇半琥珀酸酯，然后用1-乙基-3-(3-二甲基氨丙基)碳二亚胺盐酸盐与N-羟基琥珀酰亚胺作为偶联剂，将胆固醇半琥珀酸酯的羧基与乙二醇壳聚糖主链的氨基进行反应，得到胆固醇疏水改性乙二醇壳聚糖共聚物。

N-heterocyclic compounds, such as indole, imidazole, 2-methylimidazole, 2-ethylimidazole, pyrrole and pyrrolidine, could be effectively N-methylated with DMC in the presence of 1-n-butyl-3-methylimidazolium chlorid.

吲哚、咪唑、2-甲基咪唑、2-乙基咪唑、吡咯和四氢吡咯等含氮杂环化合物在氯化1-正丁基-3-甲基咪唑的催化下能被DMC有效地N-甲基化。

It is shown that the optimal conditions for the reaction of CADB with SESA are pH 12.0 and m:m=6:1.The product p-aminobenzart sulfanily ethyl CADBwas diazotized and linked with lipase.The optimal pH for lipase linked to diao-compound is 7.5.The link time is at last 12h.

试验结果表明：CADB与SESA反应的最适条件是pH＝12.0，SESA与CADB质量比为6：1，反应生成的对氨基苯磺酰乙基交联烯丙基葡聚糖凝胶经重氮化后与脂肪酶偶联的最适条件是pH7.5，偶联时间≥12h。

When proper amount of tetraethyl ammonium bromide is added to anode, specific energy of the battery could go up to 46.8Wh/kg.

当在电池的正极中添加适量的含四乙基溴化铵的混合添加剂时，电池的比能量高达46.8 Wh／kg。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新