Optimization of hydrolysis conditions for bovine plasma protein using response surface methodology

Abstract The purpose of this study was to establish optimal conditions for the hydrolysis of bovine plasma protein. Response surface methodology was used to model and optimize responses [degree of hydrolysis (DH), 2,2-diphenyl-1-picrydrazyl (DPPH) radical-scavenging activity and Fe 2+ -chelating activity]. Hydrolysis conditions, such as hydrolysis temperature (46.6–63.4 °C), hydrolysis time (98–502 min), and hydrolysis pH (6.32–9.68) were selected as the main processing conditions in the hydrolysis of bovine plasma protein. Optimal conditions for maximum DH (%), DPPH radical-scavenging activity (%) and Fe 2+ -chelating activity (%) of the hydrolyzed bovine plasma protein, were respectively established. We discovered the following three conditions for optimal hydrolysis of bovine plasma: pH of 7.82–8.32, temperature of 54.1 °C, and time of 338.4–398.4 min. We consequently succeeded in hydrolyzing bovine plasma protein under these conditions and confirmed the various desirable properties of optimal hydrolysis.