Evaluation of physicochemical and antioxidant properties of peanut protein hydrolysate.
Peanut protein and its hydrolysate were compared with a view to their use as food additives. The effects of pH, temperature and protein concentration on some of their key physicochemical properties were investigated. Compared with peanut protein, peanut peptides exhibited a significantly higher solubility and significantly lower turbidity at pH values 2-12 and temperature between 30 and 80°C. Peanut peptide showed better emulsifying capacity, foam capacity and foam stability, but had lower water holding and fat adsorption capacities over a wide range of protein concentrations (2-5 g/100 ml) than peanut protein isolate. In addition, peanut peptide exhibited in vitro antioxidant properties measured in terms of reducing power, scavenging of hydroxyl radical, and scavenging of DPPH radical. These results suggest that peanut peptide appeared to have better functional and antioxidant properties and hence has a good potential as a food additive.
Shandong Normal University, Jinan, People's Republic of China.
Lin
L
Tang
Jie
J
Sun
Hui Cui
HC
Zhang
Chu Shu
CS
Zhang
Li Na
LN
Yu
Jie
J
Bi
Feng
F
Zhu
Shao Fang
SF
Liu
Qing Li
QL
Yang
D000327:Adsorption; D010367:Arachis / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000737:chemistry; D055598:Chemical Phenomena; D005227:Fatty Acids / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology*; D006868:Hydrolysis; D017665:Hydroxyl Radical / Q000737:chemistry; D010446:Peptide Fragments / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D010851:Picrates / Q000737:chemistry; D010940:Plant Proteins / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology*; D012995:Solubility; D014867:Water / Q000737:chemistry
D001713:Biphenyl Compounds; D005227:Fatty Acids; D016166:Free Radical Scavengers; D010446:Peptide Fragments; D010851:Picrates; D010940:Plant Proteins; D014867:Water; D017665:Hydroxyl Radical; C004931:1,1-diphenyl-2-picrylhydrazyl