查询词典 reagent

Used thin-layer chromatography, outspread dose were CHC13: MeOH (8.5: 1.5) and CHC13: MeOH (7:1)(with a little ammonia and diethylamine), color reagent was 10% oil of vitriol. Observe the fluorescent spots and color sports.

通过薄层层析色谱的分析，分别用黄酮展开剂CHCl_3∶MeOH(8.5∶1.5)和生物碱展开剂CHCl_3∶MeOH(7∶1)薄层展开后，10％的浓硫酸显色，观察荧光和显色斑点。

Malonyloxyborohydride,a hydroboration reagent,is prepared by reaction of malonic acid and sodium borohydride,and is used to react with dihydromyrcene in THF.

用一种硼氢化试剂———丙二酸与硼氢化钠反应生成的丙二酰氧基硼氢化钠在THF中与二氢月桂烯反应制备香茅醇。

Its advantages are low cost, low requirement of purities of raw material and reagent, and easily controlled reaction condition.

该法原料易得、成本低廉，对原料和试剂的纯度要求不苛刻，反应条件温和，易于控制。

According to the type of the reagent being used, organic reactions are classified into electrophilic reactions and nucleophilic reactions.

P97 根据所用的试剂的类型，有机反应分为亲电反应和亲核反应。

Emphasis: The process of Various alkylation reagent producing electrophilic particle under different catalyzer and reaction mechanism of alkylation.

重点：各种烷化试剂在不同催化剂作用下亲电质点的产生和烷化反应历程。

This exposes the aldehyde groups of deoxyribose. The tissue is then soaked in Schiff ' s reagent: the development of a magenta color indicates the location of DNA.

从而暴露出脱氧核糖的醛基，然后将其放入 Schiff ' s 试剂中，紫红色部分显示 DNA 的存在部位。

The recombinant protein was more reactive with HEV antibodies than DBL reagent.

预示该基因抗原可能具有较好的反应谱，应用前景乐观。

Ammoniumpersulfate (A.R. grade,AijianModern Reagent Factory, Shanghai, China) was puried byrecrystallization twice in water before use.

Ammoniumpersulfate的（阿肯色州年级，爱建现代试剂厂，上海，中国）进行纯化两次水重结晶后使用。

MaterialsMethylmethacrylate, ethyl acrylate, acrylic acid and methacrylic acid (all A.R. grades, FirstChemical Reagent Factory, Tianjin, China) were puried bydistillation under reduced pressure and kept in therefrigerator.

物料甲基丙烯酸甲酯，丙烯酸乙酯，丙烯酸和甲基丙烯酸（所有机场铁路等级，第一化工试剂厂，天津，中国）的纯化减压蒸馏和留在refrigerator。

The results show that the PA6 has be effective as charring reagent, When the content of APP was 25%, the limiting oxygen index value of ABS/PA6/APP was found to be 29 and class V-1 of UL-94 test was passed.

结果表明，PA6具有较好的成炭作用，当APP含量为25%时，阻燃合金体系的极限氧指数可达29，UL-94测定达V-1级别，APP含量为35%时，UL-94测定达V-0级别。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。