title: Phytoglycogen octenyl succinate, an amphiphilic carbohydrate nanoparticle, and epsilon-polylysine to improve lipid oxidative stability of emulsions.
abstract: Phytoglycogen octenyl succinate (PG-OS) and epsilon-polylysine (EPL) were used to form oil-in-water emulsions with enhanced lipid oxidative stability. PG-OS is an amphiphilic carbohydrate nanoparticle prepared using octenyl succinate (OS) substitution of phytoglycogen (PG). PG-OS had a dispersed molecular density nearly 20 times that of waxy corn starch octenyl succinate (WCS-OS). Fish oil-in-water emulsions were prepared using PG-OS, WCS-OS, and Tween 20, stored at 55 degrees C for 6 days, and monitored for the accumulation of hydroperoxide and thiobarbituric acid reactive substances (TBARS). The result indicated that PG-OS may lead to high lipid oxidative stability, and that the addition of EPL may further improve the oxidative stability of emulsions. To address the interaction between PG-OS and EPL, zeta-potential was determined for various systems. The results indicated a possible formation of an interfacial complex layer comprising both PG-OS and EPL. This complex layer may provide both physical and electrostatic barriers against pro-oxidative compounds.
authors.affiliation: The Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, Indiana 47907-1160, USA.
authors.forename: Siqi L
authors.initials: SL
authors.lastname: Scheffler
authors.forename: Xue
authors.initials: X
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Huang
authors.forename: Fernanda
authors.initials: F
authors.lastname: San-Martin Gonzalez
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yao
mesh_terms: D004355:Drug Stability; D004655:Emulsions / Q000737:chemistry; D005395:Fish Oils / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry*; D011107:Polylysine / Q000737:chemistry*; D013386:Succinates / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D004655:Emulsions; D005395:Fish Oils; D010936:Plant Extracts; D013386:Succinates; D011107:Polylysine; C028480:octenyl succinate