Physical and Chemical Properties of Dietary Fiber of Meizhou Golden Pomelo Peel
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Abstract:
In this work, the total dietary fiber, water-soluble dietary fiber and water-insoluble dietary fiber in golden pomelo were extracted by enzymatic method. Their structure, physicochemical properties and intestinal function were evaluated. The results showed that the content of total dietary fiber in the peel was 65.72%, and the yield of soluble and water-insoluble dietary fiber were 15.13% and 43.21%, respectively. The structure of the total dietary fiber was porous coral. The water-soluble dietary fiber had many holes on the surface, and the structure of water-insoluble dietary fiber was smooth. All kinds of dietary fiber were rich in glucose, arabinose and xylose. The water holding capacity and swelling capacity of water-insoluble dietary fiber were better, which were 6.68 g/g and 27.61 g/g, respectively. In the 2.5 mg/mL and 10 mg/mL systems, water-soluble dietary fiber had a better inhibitory effect on glucose diffusion 0.11 mg/(mL·h). Water-insoluble dietary fiber had the best inhibitory effect on alpha-amylase, and alpha-amylase activity was 93.90%±0.02%. Water-soluble fiber had the strongest ability to destroy cholesterol, and the destruction rate were 7.20% and 9.40%, respectively. The water-soluble dietary fiber also had better DPPH· scavenging ability and iron reduction ability. The dietary fiber of pomelo peel obtained by enzymatic hydrolysis had better physicochemical properties and could be used as an excellent food additive in food.
