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).