The non-inoculated samples and samples inoculated with
ST were placed in an air chamber or ozone chamber
(L × W × H = 25 × 20 × 20 cm). The chambers were previously
cleaned with 70% ethanol to eliminate potential contaminants
during storage. The ozone chamber was
equipped with an ozone generator (MA-2, NOAH environmental
clean, Bucheon, Korea) that generates electric
tension to produce a continuous flux of ozone (10 × 10−6 kg
O3/m3/h) and negative ions. The ozone generator was set to
run for 15 min and then to turn off for 45 min using an
automatic timer plug (Theben 0260.0, Haigerloch,
Germany), and this setting was used throughout the 3-day
storage period. The chambers were placed in a refrigerator
at a temperature of 4C, and daily observations were conducted
to monitor the quality changes in the chicken breast
samples.