Proteolytic enzymes catalyze oligomerization of the . alpha . - hydroxy carboxylic acid and . alpha . - amino acid 蛋白水解酶催化-羟基羧酸和-氨基酸的低聚化。
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。
Amino acids contain both acids ( carboxylic acids ) and bases ( amino group ) , so they react sith both acids and bases 氨基酸包含酸（羧酸）和碱（氨基团）所以它既可以与酸反应也可以和碱反应。
Nitric acid oxidation was found to reduce the surface hydroxyl ( oh ) groups in increasing the carboxylic acid ( cooh ) groups 硝酸氧化减少了碳纤维表面的羟基含量，同时增加了碳纤维表面的羧基含量。
Decarboxylase an enzyme that catalyzes the decarboxylation of carboxylic acids , including the conversion of amino acids to amines 脱羧酶：能够催化羧酸进行脱羧反应的酶，包括氨基酸转化为胺的反应。
The advanced carboxylic acid waterproofing agent became main content of cement liquid water - repellent admixture that korean most used 而高级羧酸系防水剂为韩国使用最多的“水泥液体防水剂”的主要材料。
O - or n - alkylation was carried out directly by simple heating the mixture of carboxylic acid or amine with quaternary ammonium salt 将羧酸或胺类化合物与季铵盐进行简单的混合加热，便可直接得到o -或n -烷基化产物。
Batch chloration plant of synthesizing - chloro t - butyl carboxylic acid chloride was improved by using continuous liquid phase method 摘要利用连续液相氯化法对一套间歇氯化法生产-氯代特戊醯氯的装置进行改造。
