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

研究了毛杨梅栲胶磺化改性方法。

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

建立了三吲哚气相色谱含量测定分析方法。

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)代替氨水生产对氨-N,N-苯胺方法。

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)碳酸酯方法。

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

建立4-咪唑快速定量测定方法。

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

氢转移、质子化、亚桥形成可能是导致这些结构征主要原因。

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

采用HPLC测定盐酸米托蒽醌葡萄糖注射液中5羟糠醛含量。

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氧原子被亚取代后形成糖类似物。

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

叙述了氯性质,生产及综合加工简况,并简介其衍生品应用及市场状况。

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，超痕量乙醛肟能灵敏地加速溴酸钾氧化黄褪色指示反应。

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

变位酶辅酶，催化底物分子内团(主要为)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，利用改进微乳液聚合制备聚丙烯酸酯类聚合物一般都有高Tg与富间规度性质。

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代含稠合外环硼-吡咯亚染料合成、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吡啶为原料,在固定床反应器中通过含氧化钒催化剂发生气固相接触氨氧化反应制备雷米封中间体4氰吡啶,4吡啶转化率为99%,4氰吡啶选择性为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.

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

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精度,可以在桥丝上涂覆一层硝化棉或羧纤维素涂层。