Physicochemical Properties and Hypoglycemic Activity of Dietary Fiber from Apple Peel Under Different Extraction Methods
In order to clarify the differences in the physicochemical properties and hypoglycemic activity of apple peel dietary fiber by different extraction methods,apple peel dietary fiber was extracted by water extraction,high pressure assisted water extraction,acid extraction and enzymatic extraction.The results showed that the four dietary fibers were composed of Ara,Gal,GalA and small amount of Rha,Glc,Xyl,indicating that the dietary fiber of apple peel was mainly pectin polysaccharide.Among them,the yield of high pressure assisted water extraction component was the highest(15.38％),which was 5.7 times that of water extraction component.The polysaccharide content of the enzymatic extraction component(88.66％)was higher than that of other components,showing higher purity.The water extraction components had higher relative molecular mass and viscosity.By comparing the water holding capacity and oil holding capacity,it can be seen that the water holding capacity of the high pressure assisted water extraction component is better,and the oil holding capacity of the enzyme extraction component is stronger.The four kinds of dietary fibers all had different degrees of hypoglycemic ability,among which the α-glucosidase inhibition(78.38％)and glucose adsorption capacity(16.37％)of the enzymatic dietary fiber were the strongest.The comprehensive analysis showed that the high pressure assisted water method could effectively improve the yield of dietary fiber.The enzymatic extraction of apple peel dietary fiber was superior to the other three components in terms of functional activity and purity,and had higher application value.
apple peeldietary fiberpectinphysicochemical propertieshypoglycemic activity
万方数据
维普
