Journal
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
Volume 49, Issue 5, Pages 1294-1301Publisher
WILEY
DOI: 10.1111/ijfs.12425
Keywords
protein; mung bean; asiatic acid; antioxidant; Aggregation
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Funding
- Thailand Research Fund [DBG5180024]
- Royal Golden Jubilee - Kasetsart University Ph.D. Program
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This study investigated the influence of surface-inactive carbohydrates on association characteristics of amphiphilic mung bean protein hydrolysate (MPH) and asiatic acid (AA) in aqueous suspension (11.72-11.94% total solids). The carbohydrates investigated were trehalose, maltodextrin, mixed trehalose-maltodextrin and mixed maltodextrin-starch. The presence of low-molecular-weight carbohydrates enhanced micellisation of AA to form micrometre-sized particles due to depletion flocculation. Nonetheless, the presence of starch retained the submicrometre size of AA. In contrast, the presence of starch enhanced self-association of MPH via segregative phase separation. However, the mixed suspensions containing MPH, AA and carbohydrate in a ratio of 1:0-0.072:2.34, respectively, retained particle sizes of around 300nm regardless of the carbohydrate used. It was found that the MPH-AA co-aggregates were stable against the osmotic effect of carbohydrates. The results suggest that carbohydrates regulated the aggregate size and surface hydrophobic region of MPH and MPH-AA by controlling surface-induced aggregation.
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