双缩脲反应

茚三酮反应呈阴性，用酸水解后茚三酮反应和双缩脲反应呈阳性。

Its ninhydrin reaction was negative , but after acid hydrolysis , its ninhydrin reaction and biuret reaction were positive .

结果茚三酮反应和双缩脲反应呈阳性，海生素注射液中氮含量不低于0.4mg。

Results The results of the biuret reaction and ninhydrin reaction were positive .

氨基酸、蛋白质可采用茚三酮试法、双缩脲反应法、溴百里蓝钠盐法分析；

Ninhydrin method , Biuret Reation method etc. for the analysis of amino acid and protein ;

用双缩脲反应法可以测出发酵鱼粉中水溶性总肽的含量，用凯氏定氮法可以测出被沉淀的多肽的含量，从而可以计算出发酵鱼粉中寡肽的含量。

Total solvable peptide content in the fermented fishmeal was determined by using the biuret method , and polypeptide in the precipitate by using Kjeldahl method .

方法①对不同组成成分的双缩脲试剂与蛋白质反应的动力学研究。

Methods ( 1 ) Study of reaction dynamics of different TP reagent and protein .