title: Microencapsulation of water-soluble isoflavone and physico-chemical property in milk.
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 degrees 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-capsules 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.
authors.affiliation: Department of Food Science and Technology, Sejong University, 98 Kunja-dong, Kwangjin-ku, Seoul 143-747, Korea.
authors.forename: Jin Seok
authors.initials: JS
authors.lastname: Sook
authors.forename: Jae Soon
authors.initials: JS
authors.lastname: Kim
authors.forename: Hae Soo
authors.initials: HS
authors.lastname: Kwak
mesh_terms: D000042:Absorption; D000818:Animals; D002214:Capsules; D004337:Drug Carriers; D004339:Drug Compounding; D004355:Drug Stability; D005750:Gastric Juice / Q000737:chemistry; D005990:Glycerol / Q000031:analogs & derivatives; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D007422:Intestines / Q000737:chemistry; D007529:Isoflavones / Q000737:chemistry*; D008892:Milk / Q000737:chemistry*; D050178:Monoglycerides; D012995:Solubility; D013228:Stearates; D013649:Taste; D013997:Time Factors; D014867:Water
chemical_list: D002214:Capsules; D004337:Drug Carriers; D007529:Isoflavones; D050178:Monoglycerides; D013228:Stearates; C480659:polyglycerol monostearate; D014867:Water; C065753:isoflavanone; D005990:Glycerol