COMPARING PHYSICOCHEMICAL PROPERTIESrnOF HAWTHORN SUPERFINE AND FINE POWDERS

摘要

To investigate the effect of superfine grinding technology on functionalities ofrnhawthorn products, a study on physicochemical property differentials betweenrnsuperfine hawthorn powder (SFHP) and fine hawthorn powder (FHP) was carriedrnout. Specific surface area of SFHP was 2.5 times greater than that of FHP.rnMost microstructures of SFHP were broken and bioactive substances werernreleased. The water and oil holding capacities of SFHP decreased, but the waterrnsolubility index of SFHP increased. Zeta-potential results showed that SFHP hadrnhigher dispersion stability in aqueous solution than that of FHP. Although totalrnflavonoid content of SFHP was lower, its antioxidant ability was higher. Results ofrnin vitro digestion indicated that antioxidant components contained in flavonoidsrnextract of SFHP had higher antioxidant ability and most of them were utilizedrnbetter than those of FHP in simulated gastro-intestinal conditions. This studyrnmay help for hawthorn in deep processing.