Abstract
Water-soluble extract (WSE), chelated-soluble extract (CSE) and acid-soluble extract (ASE) were obtained from Canna edulis Ker by-product, and their thermal characteristics and physiological behavior were studied. Thermal properties of WSE and ASE demonstrated the exiting of cellulose, as main constituents in the extracts. Different from those of WSE and ASE, the thermal characteristics of CSE demonstrated that it was chiefly composed of cellulose and pectin. The three extracts inhibited both gastric pepsin and lipase enzymatic activities to some extent, and tryptic digestion of β-lactoglobulin as well as lipase hydrolysis of tributyrin in vitro. Therefore, the three extracts could be used as additives in the food industry, in view of safety of C. edulis by-product confirmed by animal experiment.
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