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Type: Artigo
Title: High pressure processing of cocoyam, peruvian carrot and sweet potato: effect on oxidative enzymes and impact in the tuber color
Author: Tribst, Alline Artigiani Lima
Leite Júnior, Bruno Ricardo de Castro
Oliveira, Miguel Meirelles de
Cristianini, Marcelo
Abstract: High pressure processing (HPP) is a non-thermal technology used to activate or inactivate enzymes. This study investigated the effects of HPP (600 MPa for 5 or 30 min at 25 °C) on cocoyam, Peruvian carrot and sweet potato color, and the polyphenoloxidase (PPO) and peroxidase (POD) activities in tuber cubes, puree, and enzyme extract subjected to HPP. The results showed enzyme inactivation by HPP in cocoyam (up to 55% PPO inactivation in puree and 81% POD inactivation in extract) and Peruvian carrot (up to 100% PPO and 57% POD inactivation the extract). In contrast, enzyme activation was observed in sweet potato (up to 368% PPO and 27% POD activation in puree). The color results were compatible to enzyme activity: the color parameters remained unchanged in cocoyam and Peruvian carrot, which showed high PPO and POD inactivation after HPP. Furthermore, the impact of HPP on the enzymes was influenced by the matrix in which HPP was carried out, evidencing that the enzyme structure can be protected in the presence of other food constituents
Subject: Hortaliças
Country: Países Baixos
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.ifset.2016.02.010
Date Issue: 2016
Appears in Collections:FEA - Artigos e Outros Documentos
NEPA - Artigos e Outros Documentos

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