Table 4.
Days of freezing storage | |||||||
---|---|---|---|---|---|---|---|
0 | 30 | 60 | 90 | 120 | 150 | ||
Microorganisms | Sample | Cell counts (log CFU/g) | |||||
Total viable | C | 6.26aA | 5.97aB | 5.72aBC | 5.61aC | 5.60aC | 5.72aBC |
Counts (7 ºC) | F1 | 6.24abA | 4.45cD | 5.19bB | 4.78cC | 5.18cB | 5.33bcB |
F2 | 6.00bA | 5.41bB | 5.25bB | 5.25bB | 5.23bcB | 5.25cB | |
F3 | 6.13abA | 5.52bB | 5.54aB | 5.40abB | 5.44abB | 5.53abB | |
Total Coliforms | C | 2.48aAB | 2.37aB | 2.80aA | 2.72aAB | 2.49aAB | 2.45aAB |
F1 | 2.30aA | 1.39bB | 2.47bA | 2.16bcA | 2.21bA | 2.13bA | |
F2 | 2.29aAB | 1.35bC | 2.51abA | 1.98cB | 2.35abA | 2.24abAB | |
F3 | 2.37aAB | 2.12aB | 2.74abA | 2.46abAB | 2.44aAB | 2.32aB | |
E. coli | C | 2.36aB | 1.30B | 1.60A | 1.59A | 1.45AB | 1.24B |
F1 | 1.93b | ND | ND | ND | ND | ND | |
F2 | 1.94b | ND | ND | ND | ND | ND | |
F3 | 1.39c | ND | ND | ND | ND | ND |
a,b,cMeans in the columns with the same letters did not differ significantly from samples, and,
A,BMeans in the lines with the same letters did not differ significantly from days at p < 0.05 (Tukey’s test)
ND not detected
C – control; F1 – 1 % oregano oil; F2 – 5 % potassium sorbate; F3 – 0,5 % oregano oil and 2,5 % potassium sorbate