Abstract
This study was carried out to investigate the addition of water-soluble isoflavone into milk by means of microencapsulation technique. The yield of microencapsulation, sensory attributes, and capsule stability of water-soluble isoflavone microcapsules in milk were measured. Coating materials used was polyglycerol monostearate (PGMS), and core material was water-soluble isoflavone. The encapsulation yield of water-soluble isoflavone with PGMS was 67.2% when the ratio of coating material to core material was 15:1. The rate of water-soluble isoflavone release from capsules was 18, 19, and 25% when stored at 4, 20, and 30°C for 12 days in milk, respectively. In sensory evaluation, beany flavor and color of microencapsuled water-soluble isoflavone added milk were significantly different from uncapsuled water-soluble isoflavone added milk, however, bitterness was not significantly different.In vitro study, micro-cap-sules of water-soluble isoflavone in simulated gastric fluid with the range of 3 to 6 pHs were released 3.0>15.0%, however, the capsules in simulated intestinal fluid with pH 7 were released 95.7% for 40 min incubation time. In conclusion, this study provided that PGMS as coating materials was suitable for the microencapsulation of water-soluble isoflavone, and the capsule containing milk was almost not affected with sensory attribute.
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Seok, J.S., Kim, J.S. & Kwak, H.S. Microencapsulation of water-soluble isoflavone and physico-chemical property in milk. Arch Pharm Res 26, 426–431 (2003). https://doi.org/10.1007/BF02976702
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DOI: https://doi.org/10.1007/BF02976702