Effect of Superfine Grinding on Microstructure and Nutrients of Phyllostachys pubescens Shoot
Laser granulometer and scanning electron microscopy(SEM) were usede to study the effect of superfine grinding on the microstructure and nutrients of Phyllostachys pubescens shoot under different grinding time.Nutrients including dietary fiber, protein, fat, sugar and metal element content etc. were analyzed by national standard testing methods. The results showed that as the extension of superfine grinding time, the particle size decreased significantly. And the fiber structure of superfine powder were obviously damaged. Soluble dietary fiber(SDF) increased while the insoluble dietary fiber reduced. The content of sugar increased, but protein, fat and metal elements were not significantly changed. According to the infrared spectrogram, the absorption peak of hydrogen-bonding and sugar was enhanced after superfine grinding.