presents the relative activity of peroxidase in
tomatoes at different temperatures and at different power densities.
The thermo-sonication process has activated the enzyme,
especially in the conditions where higher degradation of lycopene
was reported. The activation of the enzyme may be related to the
high concentration of hydrogen peroxide that was observed in
the tomato purée and the natural response of the cells to regulate
the levels of hydrogen peroxide by activating this enzyme. The
results rule out the hypothesis that peroxidase could be inactivating
and consequently leading to a higher loss of lycopene by the
direct reaction of hydrogen peroxide to lycopene