查询词典 acid reaction

Some coumarin derivatives are synthesized through Pechmann reaction with catalytical amount of sulfuric acid.

在催化量硫酸的存在下，用微波辐射进行Pechmann反应，制备香豆素衍生物，获得中等至良好的产率。

Using dichloropinacolone as starting material, ruthenium dioxide/celite as catalyst and sodium hypochlorite as oxidant, 3,3-dimethyl-2-oxo-butyric acid is prepared through hydrolization and oxidation two reaction steps.

以二氯频哪酮为起始原料， RuO2/Celite 为催化剂， NaOCl 作氧化剂，经水解、氧化两步反应制得3，3-二甲基-2-氧代丁酸。

ChamaecyparisIawsoniana ParI and picea sitchensis Carr.wood treated with BTCA:Values of weigh percentgainreached 9.05% and 8.25%.Values of antiswelling efficiencyreached57.2% and 55.45% respectively.Values of moisture excluding efficiencyreached47.95% and 44.89%.Chamaecyparis Iawsoniana ParI and picea sitchensis Carr.wood treatedwith 1,2,3,4-butanetetracarboxylic acid and glycerin:Values of weigh percent gainreached 13.12% and 12.24%.Values ofantiswelling efficiencyreached 61.11% and63.12% re.Values of moisture excluding efficiencyreached 46.91% and 48.93%.Woodsurface colour of Chamaecyparis Iawsoniana ParI and picea sitchensis Carr.were slightlyvaried from red to yellow and from dismal to bright in crosslinking reaction.

处理后美国扁柏和西特克云杉两种木材，分别达到：WPG9.05％和8.25％；ASE57.2％和55.45％；MEE47.95％和44.89％；酯化剂中加入丙三醇，酯化处理美国扁柏和西特克云杉木材，分别达到：WPG为13.12％和12.24％；ASE为61.11％和63.12％；MEE为46.91％和48.93％；在酯化反应中，美国扁柏木材材色由偏红向偏黄、由稍暗向明亮方向有些变化。

Stable Vitamin K 3 is synthesized by addition reaction of raw materials of niacinamide, chlorhydric acid and menadione sodium bisulfite at 25℃.

以烟酰胺、盐酸为原料，在 2 5℃反应得烟酰胺盐酸盐溶液，而后与亚硫酸氢钠甲萘醌发生加成反应，反应的物料配比为：n ∶ n ∶ n =1∶1.2 ∶1.2 5 ，得到稳定的复合维生素K3 ，收率 95 %。

GC-MS is used to determine content of free TDI, reaction kinetics is analysed by chlorhydric acid/n-dibutyl amine titration -NCO method and DSC, so the system activation energy is calculated.

采用气相色谱-质谱法测定其游离TDI含量，用盐酸-正二丁胺滴定-NCO法和DSC法相结合，分析反应动力学规律，计算体系表观活化能。

Based on the result of orthogonal experiment, theoptimum condition of the esterification reaction of chloroacetic acid with polyethylene glycolwas determined.

采用正交实验法对合成的双氯乙酸聚乙二醇酯的反应工艺条件进行了优化，确定了最佳合成路线。

The effects of mole ratio of chloroacetic acid to ethyl alcohol, catalyst dose, water-carrying agent dose and reaction time on the yield of ester are tested.

研究了氯乙酸与乙醇的摩尔比、催化剂用量、环己烷的用量、反应时间诸因素对产品收率的影响。

A new method for the determination of sulfite in waste water by spectrophotometric method is described, based on the formation of a gold nanoparticle in the reaction between chloroauric acid and sodium sulfite.

基于亚硫酸钠与氯金酸还原反应生成的金纳米粒子在532nm处有最大吸收，建立一种用分光光度法测定水中亚硫酸盐的新方法。

Gold quantum dot arrays were self-assembled inside pore channels of ordered amino-functionalized mesoporous silica thin films, employing the neutralization reaction between chloroauric acid and amino groups.

利用氯金酸与氨基官能团的中和反应，在氨基化有序二氧化硅介孔薄膜中自组装了金量子点阵列。通过改变介孔的孔径在2.3nm至8.3nm间改变，能够控制量子点的尺寸随之变化。

In the presence of chloroplatinic acid, can easily occur with the addition reaction of vinyl compounds.

在氯铂酸存在下，极易与烯类化合物发生加成反应。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。