查询词典 ethylation

Catalytic synthesis of phenetole by ethylation of phenol with diethyl carbonatein fixed bed reactor was investigated.

以碳酸二乙酯为乙基化试剂，与苯酚在气固相条件下催化合成苯乙醚。

Keywords diethyl carbonate;phenol;phenetole;potassium carbonate;active carbon;ethylation;solid base catalyst

碳酸二乙酯；苯酚；苯乙醚；碳酸钾；活性炭；乙基化；固体碱催化剂

Ethylation specific PCR analysis also revealed that the BLU promoter was highlymethylated in 74％(17 of 23) of primary tumors where the gene was downregulated,whereas only 2 of 9 non-neoplastic nasopharyngeal epithelia exhibitedhypermethylation in the BLU promoter region.

SP分析的结果表明，在23例表达下调的鼻咽癌组织中，17例(74％，17／23)标本的BLU基因发生了异常甲基化，而9例非癌对照中仅有2例甲基化，说明启动子甲基化在BLU基因的转录失活中具有重要作用。

Activity-stability experiment for the liquid phase alkylation of benzene with ethylene was proceeded for 2000hrs, the average values of ethylene conversion, ethyl-benzene selectivity and ethylation selectivity were 100%, 94.5% and 99.0% respectively.

进行了苯和乙烯液相烷基化的2 000 h 活性稳定性试验，乙烯转化率、乙苯选择性、乙基化选择性分别平均为100%、94.5%和99.0%。

Ethyloxymethylnaphththyridinecarboxylic acid ; condensation reaction ; cyclization reaction ; ethylation reaction ; hydrolysis reaction ; spectrum characteristic

乙基氧甲基萘啶羧酸；缩合反应；成环反应；乙基化反应；水解反应；光谱特征

The features of AAA adsorbed on the ethylatedβ-CD polymer were similar with those of the parentalβ-CD polymer, but theadsorption ratios of AAA on the ethylatedβ-CD polymer were higher than those of the parentalβ-CD polymer. It may be due to the strengthened hydrophobic interactions between AAA and the ethylatedβ-CD polymer, which was caused by the ethylation of the parentalβ-CD polymer.

研究表明其对芳香氨基酸的吸附规律与母体β-环糊精聚合物类似；与母体β-环糊精聚合物相比，芳香氨基酸在该聚合物上的吸附率有所增加，这可能是因为乙基化增强了β-环糊精空腔外沿的疏水性，从而增强了乙基化β-环糊精聚合物与芳香氨基酸之间的疏水相互作用。

First, the preparation of the aminom ethylation of tannin using its electrophilic reaction activity of C-6, C-8 in ring-A; then process the quaternization base on the aminom ethylation; last, progress the sulfonation by use of the activity of phenolic hydroxyl hi ring-B.

首先利用单宁A环的C—6、C—8的亲电反应活性制备单宁胺甲基化产物；然后在胺甲基化的基础上进行季胺盐化；最后利用单宁B环的酚羟基的活性进行磺化。

Total mercury and methyl mercury concentrations were analyzed by cold vapor atomic fluorescence spectrometry and aqueous phase ethylation,GC separation,and CVAFS detection.

2006年1~12月，每月采集乌江流域梯级水库入出库河流水样，用两次金汞齐-冷原子荧光光谱法和蒸馏-乙基化结合GCCVAFS法测定了水中总汞和甲基汞的浓度。

In this paper, we analyzed the larch extract tannin, aminom ethylation of larch extract tannin, quaternization of cationic larch extract tannin and amphoteric larch extract tannin (sulfonation of the larch extract tannin quaternary ammonium) by infrared spectral analysis, confirmed the quarternization and sulfonate groups, and measured its water treatment properties such as flocculation, scale inhibition, results showed that quaternization of larch extract tannin and amphoteric larch extract tannin have better water treatment ability, can realize the multifunction.

本论文采用红外光谱法对落叶松单宁、胺甲基化落叶松单宁、阳离子落叶松单宁季胺盐、两性落叶松单宁进行了化学结构分析，并对其水处理剂性能如絮凝、阻垢进行了检测。实验结果表明：落叶松单宁季胺盐和两性落叶松单宁均具有较佳的水处理能力，是性能良好的一剂多效工业水处理剂。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。