A factor that may contribute to degradation of lycopene in tomatoes
is the inactivation of enzymes, especially peroxidase, which
may reduce the protection towards the attack of lycopene by
hydrogen peroxide formed in the cell and by ultrasound.
Ultrasound partially inactivate proteases, peroxidases and enzymes
related to cell wall ; and the inhibition of peroxidase activity
has been correlated to the loss of lycopene in tomatoes