Evolution of headspace gas composition in the package, following High Pressure (HHP) treatment in samples conditioned under ambient air (a) and modified atmosphere
(b) (Modified Atmosphere MAP: 50%CO2–50%N2 or air) as a function of storage duration (from 0 to 21 days). The bars represent means of 6 replicates of headspace gas determinations in the package: ; percentage in O2 before and after HP; and ; percentage in CO2 before and after HP.