查询词典 octadecenoic acid

TsOH-SBA-15 had higher catalytic activity than sulfuric acid with the same number of acid sites.

结果表明，该催化剂对冰乙酸和正丁醇的酯化反应具有较高的催化活性。

Naphthenic acid corrosion rates were directly related to experimental temperature and total acid number.

采用失重法和表面分析研究了碳钢和不锈钢在高温环烷酸油介质中的腐蚀行为规律。

All the pollution is not acid rain, i.e., sulphuric and nitric acid dissolved in precipitation .

酸雨为含有硫酸和硝酸的雨，它并不是造成污染的唯一原因。

The economic loss is caculated in the south of the acid rain area and it is proved that economy is badly affected by the damage to the materials caused by acid precipitation.

在此基础上，本文进一步对南方酸雨区进行了估算，证明了酸沉降对材料的破坏对经济产生了严重的影响。

There is acid rain in the precipitation of 98 cities, accounting for 91.6% of the cities in the Acid Rain Control Zone.

南方地区酸雨污染较重，酸雨控制区内90%以上的城市出现了酸雨。

The process of becoming acid or being converted into an acid .

变成酸或者被转变为一种酸的过程。

The effects of concentration of sulfuric acid, temperature and time on acid leaching process were studied, and the regularity of these affecting factors was analyzed.

研究了酸浸过程中硫酸浓度、浸取温度、时间对铁浸出率的影响，分析了各个影响因素的规律性。

Large amount of acid radical ion of acid salt can coexist or not in the solution depends on whether they have proton transfer reaction.

一般酸式酸根离子在溶液中能否大量共存，主要看它们之间能否发生质子转移反应。

In the acid medium, through using the stability of the BaSO4 colloid suspension, a turbidimetric method was established for the determination of trace sulfate radical in boric acid.

研究在酸性介质中，利用BaSO4胶体悬浮液的稳定性，通过光电浊度仪测定硼酸中微量硫酸根的方法。

This paper proposes that weak acid is a coordination compound that regards hydrogen ion as "coordination body" and regards acid radical as central atom.

本文首次提出将弱酸看成是以氢离子为"配体"，以弱酸的酸根为中心"原子"所形成的"配合物"，通过计算该"配合物"的生成函数N并绘制PH－N图，用Bjerrum，N。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。