| Duration of Storage | N | Mean | S.D. | F-Value | p-Value |
| Day 1 | 15 | 0.45 | 0.04 | ||
| Day 7 | 15 | 0.45 | 0.03 | ||
| Day 14 | 15 | 0.50 | 0.05 | ||
| Day 21 | 15 | 0.49 | 0.04 | 6.682 | 0.001** |
| Day 28 | 15 | 0.51 | 0.06 | ||
| Day 35 | 15 | 0.56 | 0.11 |