甲基的

The method of sulfomethylation modification of bayberry tannin extract was investigated.

研究了毛杨梅栲胶的磺基化改性方法。

A gas chromatogram method to detect 3- methylindole content is est ablished.

了三基吲哚的气相色谱含量测分析方法。

A improved process of p-amino-N,N-dimethylaniline applied caustic soda solution as materials was introduced.

阐述了采用液碱(苛性钠溶液)替氨水生产对氨基-N,N-二基苯胺的方法。

The synthesis methods of double (three chlorine methyl) carbonate by using solvent and nonsolvent method are introduced.

给出了溶剂法和非溶剂法两种合成双(三氯基)碳酸酯的方法。

Objective:To develop the method for the determination o f 4-methyl imid azole in caramel.

4-基咪唑的快速量测方法。

Hydrogen transfer, protonization and formation of methene bridge are probablely the main reasons for the above structural characters.

氢转移、质子化、亚基桥的成可能是导致这些结构特征的主要原因。

OBJECTIVE:RP HPLC method for the determination of content of 5 hydroxymethyl furfuraldehyde(5 HMF) in mitoxantrone dextrose injections is reported.

采用HPLC测盐酸米托蒽醌葡萄糖注射液中5羟基糠醛的含量。

Carbasugars,carbocyclic analogues of true sugars,are compounds in which the ring-oxygen of furanoid or pyranoid sugars is replaced by methylene group.

碳环糖是一类呋喃或吡喃糖环中的氧原子被亚基取成的糖类似物。

This article describes property, production and comprehensive manufacturing status of methyl chlorsilane, and the application and market status of derivate.

叙述了基氯硅烷的性质,生产及综合加工简况,并简介其衍生品的应用及市场状况。

It has discovered that trace dimethyl glyoxime can sensitivly catalyize the discoloration of dimethyl yelloue by potassium bromate in sulphuric acid.

研究发现，在硫酸介质中，超痕量二基乙二醛肟能灵敏地加速溴酸钾氧化二基黄褪色的指示反应。

Prosthetic enzyme of mutase, catalyze reactions of group, mainly methyl, metachoresis in the interior of substrate molecule.

变位酶的辅酶，催化底物分子内基团(主要为基)的变位反应。

We found that the poly methacrylates prepared by modified microemulsion polymerization have properties of high glass transition temperature (Tg) and rich syndiotacticity.

另外，利用改进的微乳液聚合制备的聚基丙烯酸酯类聚合物一般都有高Tg与富间规度的性质。

Two new exocyclic ring-fused boron-dipyrromethene (BDP) dyes with benzo crown ether subunit at meso-position were prepared.Their spectroscopic and electrochemical properties were investigated.

本文报道了两种中位为苯并冠醚亚单元取的含稠合外环的硼-二吡咯亚基染料的合成、光谱和电化学性质。

Cyanopyridine,intermediate of rimifon, was synthesized from 4-picoline using vanadium oxide as a catalyst in a fixed-bed reactor, reached 99% conversion of 4-picoline, 88% selectivity and 87.

以4基吡啶为原料,在固床反应器中通过含氧化钒的催化剂发生气固相接触氨氧化反应制备雷米封中间体4氰基吡啶,4基吡啶的转化率为99%,4氰基吡啶的选择性为88%,收率为87。

Dimethyl fumarate, metyl topsin and sodium dehydrogene acetate were used in the antiseptic treatment during storage of Kudzu. The experiment indicated that the effects of metyl topsin was the best.

试用富马酸二酯、基脱布津、脱氢醋酸钠3种防腐剂对抑制葛根采的霉变情况进行初步研究,结果表明:在所用3种防腐剂中,基脱布津的防霉效果最好。

To increase the precision of the electric igniting parameters of common fusehead, a kind of wrapper such as NC or CMC,can be used to wrap the bridge wire in common fuse head .

为了提高普通点火头发火参数的精度,可以在桥丝上涂覆一层硝化棉或羧基纤维素的涂层。