Simultaneously, to further improve product performance, compound liquid (FP) with sulfonic acid group was prepared.

同时，为进一步提高产品应用性能，制备了含磺酸基团的复配液fp。

youdao

A group of polyamides formed by the condensation between an amino group of one molecule and a carboxylic acid group of another.

一类由一个分子的氨基与另一个分子的羧酸基之间，缩合而生成的聚酰胺。

youdao

Crosslinkable aromatic resin having protonic acid group, and ion conductive polymer membrane, binder and fuel cell using the resin.

含质子酸基交联性芳香族树脂及使用该树脂的离子传导性高分子膜，粘合剂，以及燃料电池。

youdao

So I show that here, so in green, you have what's called a carboxcylic acid group, a c o o h, which gets converted by s o c l 2 to a c double bond o c l or an acid chloride.

我在这里用绿色表示，我们所说的羧酸族化合物，碳，氧，氧，氢，它被亚硫酰氯转化为,一个碳氧双键与碳氯单键组成的酰氯。

麻省理工公开课 - 化学原理课程节选

And what it's used is to convert one type of group, what's called a carboxylic acid into another type of very reactive intermediate, which is called an acid chloride.

它被用来将一类被称作羧酸的化合物，转化成另外一类活性很高的反应中间体,也就是酰氯。

麻省理工公开课 - 化学原理课程节选

Amino acids link together to form a protein when the amine group on one reacts with the acid group on the next.

ECONOMIST: Folding stuff

These are an amine group, an acid group (hence the name), a hydrogen atom, and a fourth chemical group that can be any one of 20 different clusters of atoms.

ECONOMIST: Folding stuff

Results suggested that after three months, the group using the fatty acid made "highly significant improvements" in 12 out of 13 behavioural scales, including three diagnostic ADHD features - inattention, hyperactivity and impulsivity.

BBC: NEWS | UK | England | Oil pills boost pupil brain power