Table 2.
pH and water activity (aw) measurements (and standard error of the mean (SEM)) for cod treated with 1% (v/v) citral (CIT), 1% (v/v) carvacrol (CAR), 1% (w/v) thymol (THY) or 1% (v/v) eugenol (EUG) and stored at 2 °C for 18 days.
| Time (days) | Treatment | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CTL | SEM | SDW | SEM | CIT | SEM | CAR | SEM | THY | SEM | EUG | SEM | |
| pH | ||||||||||||
| 0 | 7.0 | 0.0 | 6.8 | 0.0 | 6.8 | 0.1 | 6.9 | 0.1 | 6.9 | 0.1 | 6.9 | 0.1 |
| 3 | 7.0 | 0.1 | 7.0 | 0.1 | 7.0 | 0.2 | 6.9 | 0.0 | 7.0 | 0.1 | 6.9 | 0.1 |
| 6 | 7.1 | 0.1 | 7.0 | 0.1 | 7.1 | 0.2 | 7.0 | 0.1 | 7.0 | 0.1 | 7.0 | 0.1 |
| 9 | 7.2 | 0.2 | 7.2 | 0.2 | 7.5 | 0.2 | 7.1 | 0.2 | 7.3 | 0.3 | 7.2 | 0.2 |
| 12 | 8.1 | 0.2 | 8.1 | 0.3 | 7.8 | 0.2 | 7.7 | 0.3 | 7.9 | 0.3 | 7.9 | 0.3 |
| 15 | 8.2 | 0.1 | 8.2 | 0.0 | 8.2 | 0.1 | 8.0 | 0.2 | 8.2 | 0.2 | 8.3 | 0.2 |
| 18 | 8.5 | 0.1 | 8.4 | 0.2 | 8.5 | 0.2 | 8.3 | 0.2 | 8.5 | 0.2 | 8.4 | 0.3 |
| aw | ||||||||||||
| 0 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.01 | 1.00 | 0.01 | 1.00 | 0.01 |
| 3 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 |
| 6 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 |
| 9 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 |
| 12 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 |
| 15 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 |
| 18 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 | 0.99 | 0.00 |
1 Statistical analysis: At a given sampling time the same letter indicates no significant (P > 0.05) difference. Absence of a letter also indicates no significant (P > 0.05) difference.