Flavor and color deterioration in pressure treated foods during storage were attributed to residual enzyme activity by Horie et al.(1991) and Cano et al. (1997). Hoover (1997) indicated blanching as a prerequisite for pressure treatment of fruits and vegetables to minimize enzymatic and oxidative reactions. Consequently, for the development of HHP processes for fruit products, it is essential to understand the influence of pressure on deteriorative enzymes. The purpose of this research was to determine the effects of blanching and HHP treatments on natural flora evolution, PPO activity, and color during storage
of banana puree adjusted to pH 3.4 and water activity of aw 0.97.