title: Effect of oil droplet size on the oxidative stability of spray-dried flaxseed oil powders.
abstract: The effect of the size of oil droplets on the oxidative stability of flaxseed oil in spray-dried powders was investigated. Maltodextrin with a dextrose equivalent of 25 was used as a wall material, and sodium caseinate and transglutaminase-polymerized sodium caseinate were used as emulsifiers. The oxidative stability of flaxseed oil encapsulated in the spray-dried powders was evaluated using lipid oxidation and conductometric determination tests at 105 °C. The powders containing larger oil droplets exhibited higher surface oil content after spray drying, and higher peroxide value and conductivity after storage at 105 °C. Removal of the surface oil from the powders by washing with hexane significantly decreased the conductivity. The results indicated that the surface oil of the spray-dried flaxseed oil powders affected the oxidation stability.
authors.affiliation: a Department of Agriculture and Food Technology, Faculty of Bio-environmental Science , Kyoto Gakuen University , Kameoka , Kyoto , Japan.
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Shiga
authors.affiliation: b Department of Applied Biological Science , Kagawa University , Miki-cho , Japan.
authors.forename: Tze
authors.initials: T
authors.lastname: Loon Neoh
authors.affiliation: b Department of Applied Biological Science , Kagawa University , Miki-cho , Japan.
authors.forename: Ai
authors.initials: A
authors.lastname: Ninomiya
authors.affiliation: b Department of Applied Biological Science , Kagawa University , Miki-cho , Japan.
authors.forename: Sae
authors.initials: S
authors.lastname: Adachi
authors.affiliation: c AgroSup Dijon , Dijon , France.
authors.forename: Ignacio Lopez
authors.initials: IL
authors.lastname: Pasten
authors.affiliation: d Division of Food Science and Biotechnology, Graduate School of Agriculture , Kyoto University , Kyoto , Japan.
authors.forename: Shuji
authors.initials: S
authors.lastname: Adachi
authors.affiliation: b Department of Applied Biological Science , Kagawa University , Miki-cho , Japan.
authors.forename: Hidefumi
authors.initials: H
authors.lastname: Yoshii
mesh_terms: D002364:Caseins / Q000737:chemistry; D003890:Desiccation; D004355:Drug Stability; D004655:Emulsions / Q000737:chemistry*; D008043:Linseed Oil / Q000737:chemistry*; D015227:Lipid Peroxidation; D010084:Oxidation-Reduction; D010316:Particle Size; D011134:Polysaccharides / Q000737:chemistry; D011208:Powders / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D002364:Caseins; D004655:Emulsions; D011134:Polysaccharides; D011208:Powders; C008315:maltodextrin; D008043:Linseed Oil
keywords: casein; emulsion oil droplet size; encapsulation; n-3 polyunsaturated fatty acid; spray drying