black LDPE resin, thickness of 63 mm, the O2 transmission rate was
7.99 7 L m2 s1 at 25 C and standard pressure and the CO 10 2 transmission rate was 2.91 106 L m2 s1 at the same tempera-ture and pressure conditions (VWR, Lisbon, Portugal); the headspace volume inside the packages was approximately 0.5 L) and packaged under four different atmospheres: (1) atmospheric air (control in passive MAP); (2) vacuum (no atmosphere); (3) N2enriched atmosphere; and (4) Ar-enriched atmosphere. Briefly, airpackaging consisted of sealing without eliminating the air in the package (20.8% O2 and