Phytoglycogen Octenyl Succinate, an Amphiphilic Carbohydrate Nanoparticle, and epsilon-Polylysine To Improve Lipid Oxidative Stability of Emulsions

作者：Scheffler Siqi L; Wang Xue; Huang Lei; Gonzalez Fernanda San Martin; Yao Yuan^*

来源：Journal of Agricultural and Food Chemistry, 2010, 58(1): 660-667.

DOI：10.1021/jf903170b

• Phytoglycogen octenyl succinate
• epsilon-polylysine
• emulsion
• oxidative stability

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.

• 出版日期2010-1-13