In Modified Atmosphere Packaging (MAP) of fresh-cut fruits and vegetables, which of the following packaging film characteristics are essential to avoid anaerobic fermentation and off-odors?
Options:
(A) Film oxygen transmission rate (OTR) matched to the respiration rate of the packaged produce mass
(B) Carbon dioxide permeability typically 3 to 5 times higher than oxygen permeability to prevent excessive $CO_2$ buildup
(C) Adequate water vapor transmission rate (WVTR) to avoid in-pack condensation without causing product desiccation
(D) Completely impermeable hermetic aluminum foil barrier with zero gas transmission
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
Equilibrium MAP requires matching OTR to consumption (A), higher $CO_2$ transmission to prevent toxic hypercapnia (B), and proper moisture permeability to prevent droplet condensation that triggers mold growth (C). Foil laminates (D) seal hermetically, driving respiration to zero oxygen and causing rapid anaerobic spoilage.