甲基化反应

与aveD功能相似，milD参与milbemycin的生物合成，在milbemycin生物合成中可能催化C5位OH的甲基化反应。

Like aveD , milD is involved in the biosynthesis of milbemycin and probably catalyses the methylation of the hydroxyl group at C5 position of milbemycin compounds .

iAs3+或iAs5+染毒大鼠可改变MTR的活力，通过影响叶酸的正常代谢、细胞内DNA甲基化反应以及脱氧核苷酸三磷酸盐的生物合成，进而影响砷的作用机制。

IAs3 + or iAs5 + can modify the vitality of MTR in rats to affect normal metabolism of folic acid and intra-cellular DNA methylation reaction and biosynthesis of deoxynucleotide triphosphate , then impact arsenical mechanism of action . 4 .

N（C2H5）3HCl-2ZnCl2离子液体催化十二烷基苯的氯甲基化反应研究

Study on Blanc chloromethylation of Dodecylbenzene catalyzed by zncl_2 ionic liquid

苯胺在Hβ分子筛上的甲基化反应

Aniline methylation over H β molecular sieves

用S-甲基化反应和~2HNMR、~（13）cNMR表征石油中有机硫的结构

Structural characterization of organic sulfur compounds in petroleum by s methylation and 2H nmr , 13 C NMR

考察了以活性炭（AC）为载体，通过真空浸渍制备的负载型催化剂对甲基化反应的催化活性。

The catalytic activities of active carbon ( AC ) loaded with alkali metal salts by vacuum impregnation were studied .

对部分水解的聚丙烯酰胺（PAM）的胺甲基化反应进行分析。

The reaction of aminomethylation of partially hydrolyzed PAM was analysed .

讨论了羟甲基化反应、醚化反应中体系pH值及原料配比对反应速率的影响。

The influences of pH value of material system during hydroxymethylation and etherification and the constituent ratio on reaction rate are also discussed .

此外还有甲基化反应、氨基酸结合反应、脂肪酸结合反应、缩会反应等，在II相代谢中发挥着各种作用。

Other conjugation reactions include methylations , amino acid conjugations , fatty acid conjugations and condensation reactions which play different roles in phase II metabolism .

在此条件下DMA产率为55.7%。对开发多酸新的催化领域及开发苯胺N-甲基化反应制备N，N-二甲基苯胺的新催化剂，提供了很好的研究基础和实验依据。

In this condition , DMA attached 55.7 % yield , which provided valuable information for exploring new catalyst in preparation of DMA .

酸全水解，甲基化反应，高碘酸盐氧化及降解，IR，1H-NMR和13C-NMR分析其结构。

Methylation analysis , periodate oxidation and degradation , IR , () ~ 1H-NMR and () ~ ( 13 ) C-NMR methods were adopted to elucidate the chemical structure .

方法采用Southern杂交、PCR特异的甲基化反应、甲基化敏感的单链结构分析等技术检测大鼠激素非依赖型前列腺癌和细胞株（PLS10、20和30）的AR基因启动子区域甲基化状态。

Methods The methylation status of the AR gene promoter region in rat prostate cancer and cell lines ( PLS10,20 , and 30 ) was investigated by Southern blotting , methylation-specific polymerase chain reaction , and methylation-sensitive single-strand conformation analysis ( MS-SSQA ) .

同时，对马铃薯淀粉羧甲基化反应动力学、羧甲基淀粉水溶液性质、离子交联的壳聚糖-羧甲基淀粉水凝胶的pH值敏感性及其载药凝胶的释药行为进行了研究。

Moreover , the kinetics of carboxymethylation on potato starch and solution properties of carboxymethyl starch aqueous solution were studied . In addition , ionic crosslinked chitosan-carboxymethyl starch gel beads were prepared and the drug release behaviors of drug-loaded beads were researched in simulation duodenal fluid .

主要实验内容和结果如下：（1）改变羧甲基化反应条件，制备了取代度不同的多种的N，O-CMC。

The main study of contents and results are as follows : ( 1 ) Change the conditions of reaction , various N , O-CMC products with different degree of substitution are synthesized .

并对ZPBBC催化乙二醇单酚醚甲基化反应进行了讨论。

The methylation of glycol monophenyl ether catalyzed with ZPBBC was also discussed .

以油酸为起始原料，经酰胺化和羧甲基化反应制得了油酸单乙醇酰胺醚羧酸盐（OAEC）。

Oleic acid monoethanol amide ether carboxylate ( OAEC ) was synthesized by the amidation and carboxylation of oleic acid .

通过双醚化反应、氯甲基化反应和在强碱性条件下进行的脱氯化氢反应，制备出可溶性聚（2甲氧基5辛氧基）对苯乙炔（PMOCOPV）。

A soluble poly ( 2 methoxy 5 octyloxy ) p phenylene vinylene ( PMOCOPV ) was synthesized through double etherification , chloromethylation and dehydrochlorination reactions .

而螯合纤维（CF）是高效吸附材料的主要发展方向之一。首先，本文以聚丙烯腈纤维（PANF）为基体，通过胺化反应和羧甲基化反应制得一系列新型螯合纤维。

As one type of high effective sorbents , the chelating fibers have been now widely developed . Firstly , in this dissertation a series of novel chelating fiber based on polyacrylonitrile fiber was prepared through amination and carboxymethylation .

同时，运用红外光谱分析对KGM羧甲基化反应历程进行了探讨，所得CMK溶胀速率快，水溶胶透光率高。

The reaction mechanism for carboxy methylation of KGM was proposed and checked by infrared spectra . Meanwhile , it also shows that the properties of CMK are rather good in terms of hydrated rate and hydrosol transmittance .

羟甲基化反应的较佳合成工艺条件为：摩尔比1∶3.5、甲醛溶液浓度30%，反应温度30℃，反应时间40h，以丙酮为沉降剂。

The better conditions of hydroxymethylation process were found as follows : molar ratio of phenol to formadehyde 1 ∶ 3.5 , formadehyde solution concentration 30 % , reaction temperature 30 ℃, acetone as sinking agent .

研究了反应机理，考察了各种因素对氯甲基化反应的影响规律，优化了反应条件，通过红外光谱法与Volhard分析法表征了产物的化学结构与组成。

The reaction mechanism was investigated , the effects of various factors on the chloromethylation reaction were examined , and the optimum reaction conditions were determined . The chemical structure and composition of the products were characterized with infrared spectrum and Volhard method .

β沸石催化苯酚甲基化反应

Study on the alkylation of phenol with methanol over zeolite β

三氯化铝-金属氯化物复合物催化苯的甲基化反应

Methylation of benzene with methane catalyzed by aluminum CHLORIDE-METAL chloride complexes

后一步O-甲基化反应与第一条路线一致。

Thirdly , the O-methylation was consistent with the first route .

考察2-乙氧基-5-乙酰氨基苯甲酸乙酯（6）的氯甲基化反应，结果表明，N-氯甲基化反应的产物是主要产物。

The chloromethylation of ethyl 2-ethoxy-5-acetylamino benzoate gave ethyl 2-ethoxy-5-N-chloromethyl-acetylamino benzoate .

有机电解质在胶束催化聚苯乙烯氯甲基化反应中的作用

Effect of Organic Electrolyte on Chloromethylation of Polystyrene in Micellar Catalytic System

控温下微波反应装置用于壳聚糖羧甲基化反应

Temperature-controlling microwave reaction apparatus and its application to carboxymethylation reaction of chitosan

邻硝基氯苯相转移O-甲基化反应动力学研究

A kinetic study on o nitrochlorobenzene o methylation by phase transfer catalyst

选择性甲基化反应研究&嗪草酮的合成新方法

A new method of selective methylation reaction for synthesis metribuzin

苯胺气相N-甲基化反应与动力学研究

Research on Activity and Kinetics of Vapor-Phase N-Methylation of Aniline