| Samples | Storage time (wk) | |||
|---|---|---|---|---|
| 0 | 4 | 8 | 12 | |
| Control | 20.38±0.42 | 21.35±1.13 | 22.11±0.38 | 23.43±0.20 |
| EPM | 19.60±1.05 | 23.09±1.04 | 23.05±0.31 | 23.18±0.59 |
| 20.50±0.80 | 22.58±1.58 | 23.18±0.54 | 23.34±0.36 | |
| RGP | 19.86±1.21 | 22.74±0.86 | 22.98±0.13 | 23.71±0.30 |