Thus especial attention
should be paid to the dual action of phenols of the antioxidant
activity and oxidative browning. Peroxidase was one of the main
antioxidant enzymes and catalysed the polymerisation of phenolic
compounds as well (Blokhina, Virolainen, & Fagerstedt, 2003), and
was usually estimated as main factor to illustrate the changes of
phenol metabolism.