Table 3. Changes in the pH, VBN, TBARS, and TAC of pork loins with various treatments and storage periods

Parameters Treatment Storage period
0 d 8 d 16 d
pH Refrigeration (+3°C) 5.64±0.07CD 5.58±0.05Dc 5.66±0.04Cy
Supercooling 5.64±0.07CD 5.63±0.04CDbc 5.71±0.04BCxy
Freezing (–3°C) 5.64±0.07CD 5.68±0.05Cb 5.77±0.01Bx
Freezing (–18°C) 5.64±0.0CD 5.87±0.04Aa 5.78±0.07Bx
VBN (mg/100 g) Refrigeration (+3°C) 5.85±0.17B 6.67±0.17Aa 6.84±0.17Ax
Supercooling 5.85±0.17B 6.16±0.20Bb 6.16±0.15By
Freezing (–3°C) 5.85±0.17B 6.14±0.20Bb 6.15±0.20By
Freezing (–18°C) 5.85±0.17B 6.11±0.26Bb 6.11±0.26By
TBARS (mg/MDA kg) Refrigeration (+3°C) 0.193±0.006BC 0.238±0.059A 0.187±0.010BCxy
Supercooling 0.193±0.006BC 0.222±0.041AB 0.175±0.004Cy
Freezing (–3°C) 0.193±0.006BC 0.218±0.030ABC 0.183±0.005BCxy
Freezing (–18°C) 0.193±0.006BC 0.209±0.015ABC 0.190±0.015BCx
TAC (Log CFU/g) Refrigeration (+3°C) 3.80±0.20B 6.08±0.07Ax
Supercooling 3.80±0.20A 3.28±0.16By
Freezing (–3°C) 3.80±0.20A 3.59±0.42Ay
Freezing (–18°C) 3.80±0.20A 3.26±0.10By
Means with different letters within the same column are significantly different (p<0.05).
Means with different letters within the 8-day data are significantly different (p<0.05).
Means with different letters within the 16-day data are significantly different (p<0.05).
VBN, volatile basic nitrogen; TBARS, thiobarbituric acid reactive substances; TAC, total aerobic count.