At high
content of CO2 (80%), carbonic acid formed in muscle
probably caused the inactivation of antioxidative
enzymes, e.g. gluthathione peroxidase, resulting in the
higher oxidation in the muscle (Renerre, Dumont, &
Gateellier, 1996). Therefore, CO2-enriched packaging
effectively inhibited the spoilage caused by microorganisms,
but it could not prevent the chemical deterioration,
especially lipid oxidation.