The possibility of enzymatic browning by polyphenoloxidase and peroxidase as a causal agent can be discarded since, in addition to using frozen pasteurized pulps, the samples suffered further heat processing during elaboration
of the mango nectars, which would also help inactivate enzymes responsible for browning (Freitas, Francelin, Hirata, Clemente, & Schmidt,2008; Khan & Robinson, 1993; Valderrama, Marangoni, & Clemente,2001)