Development and stability of novel selenium colloidal particles complex with peanut meal peptides

摘要

A novel selenium nanoparticles (SeNPs) was prepared by using peanut meal peptides mixture (Ppm) as a stabilizer in ascorbic acid reduction sodium selenite system. It was found that Ppm prepared by alcalase and neutral protease had high degree of hydrolysis and antioxidant activity and the obtained Ppm-SeNPs solution were stabilized at 4 degrees C for 60 days with an average particle size of 140 nm. The interaction and morphological characterization revealed that Ppm-SeNPs were spherical and wrapped by Ppm successfully which may contributed to electrostatic and hydrophobic interaction. The results of infrared spectroscopy indicated that the N-and O- functional groups on the Ppm were combined with SeNPs. Moreover, ascorbic acid and cysteine were compared as the reducing agents for reducing sodium selenite, it turned out that the stability of Ppm-SeNPs obtained by ascorbic acid as reducing agent was better than that of cysteine.