Table 3.
Color parameters of ginger slices dried at different temperatures against the coinciding time intervals.
| Drying Temperatures | Color Parameters | Drying Intervals | |||||
|---|---|---|---|---|---|---|---|
| 0 h | 2 h | 4 h | 5 h | 6 h | Final | ||
| 50 °C | L* | 70.78 ± 1.27 a | 62.5 ± 0.87 e | 64.87 ± 1.03 d | 66.36 ± 0.09 cd | 68.63 ± 0.41 ab | 68.28 ± 1.24 bc |
| a* | −3.67 ± 0.2 d | 0.28 ± 0.48 c | 1.37 ± 0.28 b | 2.85 ± 0.18 a | 1.18 ± 0.12 b | 1.41 ± 0.37 b | |
| b* | 40.71 ± 0.54 a | 41.33 ± 0.83 a | 37.43 ± 0.9 b | 41.64 ± 1.93 a | 35.84 ± 0.29 b | 31.55 ± 2.13 c | |
| 60 °C | L* | 72.83 ± 0.43 a | 64.68 ± 0.24 bc | 59.79 ± 2.59 c | 48.05 ± 5.00 d | 68.77 ± 0.83 ab | 66.53 ± 1.76 b |
| a* | −4.44 ± 0.01 d | −0.43 ± 0.16 c | 2.65 ± 0.47 b | 6.85 ± 1.11 a | 1.23 ± 0.23 bc | 1.83 ± 1.1 b | |
| b* | 37.34 ± 0.52 a | 36.26 ± 1.63 ab | 31.28 ± 1.14 bc | 30.24 ± 0.14 c | 33.02 ± 4.31 abc | 32.26 ± 2.63 abc | |
| 70 °C | L* | 73.70 ± 2.38 a | 59.90 ± 1.73 b | 58.55 ± 1.28 b | 58.98 ± 2.22 b | 61.67 ± 1.00 b | ← |
| a* | −5.37 ± 0.62 c | 1.21 ± 0.45 b | 2.69 ± 0.38 ab | 3.63 ± 0.94 a | 2.98 ± 1.01 a | ← | |
| b* | 34.37 ± 1.34 a | 34.04 ± 2.82 a | 32.60 ± 4.96 a | 33.96 ± 0.35 a | 35.83 ± 2.60 a | ← | |
← represents that at the corresponding drying temperature, the final drying interval was already accomplished at the preceding drying interval (6 h). Results are reported as mean ± standard deviation. In each row, values with different superscript letters are statistically different (p < 0.05) from each other.