Table 2. Effect of ozone exposure on the instrumental color of ground Hanwoo beef inoculated with E. coli O157:H7 at refrigeration temperature.
| Bacteria | Inoculation with E. coli O157:H7 | Ozone treatment | Storage (d) |
|||
|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | |||
| Lightness (CIE L*) | No | No | 44.2±1.6B | 46.1±1.7bB | 45.8±2.7aB | 51.8±4.8aA |
| Yes | 44.2±1.7C | 48.8±2.5aA | 46.0±2.3aBC | 48.7±2.83abA | ||
| Yes | No | 44.5±1.3B | 45.3±2.1bB | 44.7±2.0abB | 47.6±2.8bA | |
| Yes | 44.5±1.3B | 45.5±3.3bB | 43.7±1.5bB | 47.6±2.1bA | ||
| Redness (CIE a*) | No | No | 16.4±1.3aA | 14.4±1.3bB | 16.79±1.5aA | 7.8±2.3bC |
| Yes | 16.4±1.3aA | 11.3±1.3cB | 11.3±1.6bB | 6.7±0.7bC | ||
| Yes | No | 13.9±1.3bB | 15.9±1.2aA | 16.8±1.0aA | 9.6±1.4aC | |
| Yes | 13.9±1.3bA | 11.2±1.6cC | 12.3±0.5bB | 6.7±0.8bD | ||
| Yellowness (CIE b*) | No | No | 8.7±0.54bAB | 7.5±0.8bB | 9.5±0.8aA | 4.9±1.6bC |
| Yes | 8.7±0.54bAB | 6.8±0.9bC | 7.9±1.4bB | 5.7±1.3abC | ||
| Yes | No | 9.5±1.22aA | 8.6±0.8aAB | 9.5±0.8aA | 6.0±1.3abB | |
| Yes | 9.5±1.22aA | 7.7±1.3bB | 9.0±0.7aA | 6.2±1.0aC | ||
Mean values±standard deviation.
a-cMeans in the same column followed by different letters in superscript lower-case are significantly different (p<0.05).
A-CMeans in the same row followed by different letters in superscript upper-case are significantly different (p<0.05).