Extraction of Dietary Fiber from Apple Flesh Pomace Using Hemicellulase

In this study,the hemicellulase extraction process of dietary fiber from apple flesh pomace was optimized,and the structures and properties of soluble dietary fiber and insoluble dietary fiber were studies. The results showed that hemicellulase optimum dosage was 90 U / g,enzymolysis temperature was 50 ℃,pH value was 4. 6,enzymolysis time was5 h. Under the optimal extraction condition,the extraction yield reached 18. 97%. The soluble dietary fiber was higher in solubility and lower in viscosity after enzymolysis. The expansibility and retention ability of insoluble dietary fiber were improved. Compared with controls,the infrared spectrum of soluble dietary fiber and insoluble dietary fiber showed the similar properties of polysaccharides and chemical bond,their microstructure showed a clear change.