Table 4. Color of thawed pork neck according to various freezing temperatures and storage periods
Color |
| Storage temperature (°C) | Storage period (mon) |
Control | 0.5 | 1 | 2 | 3 | 4 | 5 | 6 |
CIE L* | −18 | 36.15±1.76b | 34.23±1.03bB | 34.66±1.96b | 35.99±2.15b | 35.07±0.56b | 35.73±3.51b | 35.94±2.40bA | 44.56±2.17aA |
−50 | 36.15±1.76b | 38.68±1.71aA | 35.61±2.61b | 34.53±1.13b | 36.37±2.05b | 34.50±1.27b | 34.36±1.70bAB | 34.82±2.99bB |
−60 | 36.15±1.76abc | 38.33±3.19aA | 37.01±2.87ab | 35.32±1.46bcd | 34.84±4.56bcd | 33.94±1.05cd | 33.37±1.36dB | 36.35±2.67abcB |
CIE a* | −18 | 9.26±0.81d | 13.95±1.07abA | 10.91±0.56cd | 11.02±0.73cB | 13.32±1.88b | 9.65±0.42cdB | 9.98±1.41cdB | 15.03±2.23aA |
−50 | 9.26±0.81d | 9.68±1.26dC | 10.97±0.30c | 13.87±0.71aA | 13.83±0.67a | 11.41±1.20cA | 11.50±0.41cA | 12.50±0.77bB |
−60 | 9.26±0.81c | 11.66±1.39bB | 11.27±0.67b | 10.91±1.06bB | 12.31±1.41b | 11.54±0.72bA | 11.86±0.62bA | 14.20±2.26aAB |
CIE b* | −18 | 2.62±0.27e | 6.33±0.04c | 4.88±0.20dB | 4.92±0.90dB | 7.89±0.76bA | 3.36±1.33eB | 5.83±0.52c | 10.21±0.84aA |
−50 | 2.62±0.27d | 5.15±0.62c | 4.91±0.78cB | 6.20±0.38abA | 6.63±0.98aAB | 5.25±1.10cA | 5.43±0.29bc | 5.53±0.83bcC |
−60 | 2.62±0.27b | 5.94±1.16a | 5.63±0.75aA | 5.46±0.38aB | 6.01±1.82aB | 5.38±0.48aA | 5.52±0.25a | 6.36±0.93aB |
ΔE | −18 | | 7.37±0.82bA | 4.66±1.39c | 4.12±1.39cB | 7.48±1.71b | 4.15±1.13cB | 4.51±1.18cB | 11.94±2.17aA |
−50 | | 3.24±0.68dC | 4.26±1.25cd | 7.10±0.91aA | 6.87±0.69a | 5.20±1.38bcAB | 5.38±1.10bcAB | 6.16±1.60abB |
−60 | | 5.23±1.81bcB | 4.68±1.20bc | 4.54±0.97aB | 7.35±1.23a | 5.57±1.10bcA | 6.23±1.14abA | 7.23±2.30aB |
Means with different letters within the same storage temperature are significantly different (p<0.05).
Means with different letters within the same storage period are significantly different (p<0.05).