carboxylic group meaning in English

羧基

The symmetric structure of oxalic acid molecule and two carboxylic group on both ends ensure the stableness of c = c double bond
草酸分子属于对称结构，两端的羧基使两个碳原子稳定化。
In this paper , a new class of concrete high performance water reducer ( hpwr ) was designed from chemical classification of high performance wra , working principle and unit structure model of poly - carboxylate series wra . the comb - like copolymer structure of hpwr was " carboxylic group - ether link - ester link " . the synthetic chemical materials was polyethylene glycil , acrylic acid and methyl - metacrylic acid ester
本文从高性能减水剂的化学结构、作用机理以及聚羧酸类减水剂的单元结构模型出发，设计出国内所没有的一类新型高性能减水剂? ? “羧酸?醚键?酯键”为单元结构模型的梳型分子结构的减水剂共聚物，并确定了以聚乙二醇( peg )系列、丙烯酸( aa ) 、甲基丙烯酸甲酯( mma )为合成该类减水剂的主要化学原料。