title: Spray-dried structured lipid containing long-chain polyunsaturated fatty acids for use in infant formulas.
abstract: Human milk fat (HMF) analogs are structured lipids (SLs) modified to have palmitic acid content at the sn-2 position of the triacylglycerol (TAG) and fatty acid composition comparable to HMF. Some of these SLs are also designed to incorporate long-chain polyunsaturated fatty acids (LCPUFAs) because of their important role in infant development. In this study, Maillard reaction products (MRPs), obtained from heated whey protein isolates and corn syrup solids (CSS) solution, were used as encapsulants for microencapsulation of 2 enzymatically synthesized SLs for infant formula applications. The encapsulated SL powders were obtained through spray-drying and evaluated in terms of their microencapsulation efficiency, chemical and physical properties, oxidative stability, and dispersibility. The microencapsulation efficiency of the SLs was 90%. Dispersibility test using particle size measurement demonstrated that these powders dispersed quickly into a homogeneous suspension. The encapsulated SL powders had low peroxide and thiobarbituric acid-reactive substances values. Lower oxidative stability was obtained in the powder containing SL with a higher degree of unsaturation and a lower concentration of tocopherols. The results demonstrated that the degree of fatty acid unsaturation and concentration of endogenous antioxidant in starting oils influenced the oxidative stability of the encapsulated SLs.
authors.affiliation: Dept. of Food Science and Technology, The Univ. of Georgia, Athens, GA 30602-2610, U.S.A.
authors.forename: Supakana
authors.initials: S
authors.lastname: Nagachinta
authors.affiliation: Dept. of Food Science and Technology, The Univ. of Georgia, Athens, GA 30602-2610, U.S.A.
authors.forename: Casimir C
authors.initials: CC
authors.lastname: Akoh
mesh_terms: D004281:Docosahexaenoic Acids / Q000032:analysis; D005231:Fatty Acids, Unsaturated / Q000032:analysis*; D006801:Humans; D055767:Immobilized Proteins / Q000737:chemistry; D041943:Infant Formula / Q000737:chemistry*; D015416:Maillard Reaction / Q000187:drug effects; D008895:Milk, Human / Q000737:chemistry; D010084:Oxidation-Reduction; D019308:Palmitic Acid / Q000032:analysis*; D010545:Peroxides / Q000032:analysis; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis; D024505:Tocopherols / Q000032:analysis; D014280:Triglycerides / Q000032:analysis*; D014867:Water / Q000032:analysis
chemical_list: D005231:Fatty Acids, Unsaturated; D055767:Immobilized Proteins; D010545:Peroxides; D017392:Thiobarbituric Acid Reactive Substances; D014280:Triglycerides; D014867:Water; D004281:Docosahexaenoic Acids; D019308:Palmitic Acid; D024505:Tocopherols
keywords: human milk fat analog; microencapsulation; oxidative stability; spray-drying; structured lipid