Antioxidant activity of Maillard reaction products (MRPs) derived from fructose-lysine and ribose-lysine model systems.

Department of Food Technology, Cape Peninsula University of Technology, Bellville 7535, South Africa. vhanganil@cput.ac.za

Food chemistry 2013 Apr 15

filter terms:

Maillard reaction products (MRPs) were prepared from aqueous ribose-lysine (RL) and fructose-lysine (FL) model systems at pH 9, heated at 60, 80 and 120 °C for 15, 60 and 120 min. Browning intensity (BI) and pH reduction were monitored throughout the reaction. 1,1-Diphenyl-2-picryl-hydrazyl (DPPH-RS), peroxyl (PRS), and hydroxyl radical scavenging (HRS) and reducing power (RP) measured their antioxidant activity. The pH of FL and RL system decreased (p<0.05) as reaction temperatures and times increased. This reduction coincided with the increase (p<0.05) in BI for all MRPs. With the exception of HRS activity, the antioxidant activity of FL increased (p<0.05) with increased reaction temperature, while that of RL systems decreased (p<0.05). Concerning sugar reactivity, RL systems exhibited higher (p<0.05) reduction in pH, BI, DPPH-RS, PRS and RP than FL model systems, with no considerable differences (p>0.05) in HRS activity. Copyright © 2012 Elsevier Ltd. All rights reserved.

Citation

Lusani Norah Vhangani, Jessy Van Wyk. Antioxidant activity of Maillard reaction products (MRPs) derived from fructose-lysine and ribose-lysine model systems. Food chemistry. 2013 Apr 15;137(1-4):92-8