Table 1.
Effect of different chemical pretreatments on the properties of dried mushrooms in medium size dryer
| Parameters | T1 | T2 | T3 | Control |
|---|---|---|---|---|
| Drying time (h) | 13 | 14 | 14 | 13.5 |
| Final moisture content (% db) | 5.45 | 5.83 | 6.67 | 6.54 |
| Colorimeter readings | L = 43.5 | L = 40.1 | L = 37.7 | L = 41.4 |
| a = 4.2 | a = 4.6 | a = 4.4 | a = 4.3 | |
| b = 11.3 | b = 11.7 | b = 11.2 | b = 11.2 | |
| Rehydration ratio | 2.92 | 2.38 | 2.27 | 2.58 |
| Coefficient of rehydration | 0.29 | 0.24 | 0.22 | 0.26 |
T1: 1.0% potassium metabisulphite, T2: 0.5% citric acid and T3: 0.5% potassium metabisulphite + 0.2% citric acid) for 15 min and control (samples without pretreatment)