英语语法分析

The methods of ninhydrin and molybdenum blue, and bi directional soil section slicing were used.

利用茚三酮法、钼蓝法及土壤双向切片法。

The proof of grafting was established by IR spectra, ninhydrin test, nitrogen estimation and other analytical methods.

并用红外光谱、水合茚三酮反应、含氮量分析等方法验证接枝反应的进行。

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

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。