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. 2020 Aug 10;25(16):3643. doi: 10.3390/molecules25163643

Table 1.

Impact of the drying techniques on parameters A, k and n of the modified Page’s model used to describe the drying kinetics of loquat fruit and MC (moisture content), aw (water activity) and color coordinates (L*, a*, b* C*, H°, ΔE).

Treatment ± Drying Kinetics MR=A·ek·τn RMSE R 2 MC
(g/100 g ww)
aw Color Coordinates ¥
A k n τ
CD VMD L* a* b* C* H°* ΔE
FD - λ - - - - - - 2.80 ± 0.09 c 0.184 ± 0.001 c 54.4 ± 0.3 a 9.17 ± 0.12 ab 20.9 ± 0.6 a 22.8 ± 0.6 a 66.3 ± 0.9 a 7.1 ± 2.4 c
CD 50 1 0.013 0.96 660 - 0.0049 0.9998 8.38 ± 0.07 a 0.383 ± 0.007 a 38.2 ± 2.3 b 10.20 ± 1.27 a 15.7 ± 3.3 ab 18.7 ± 3.5 b 56.7 ± 2.5 bc 11.2 ± 3.5 b
CD 60 1 0.011 1.04 540 - 0.0052 0.9997 6.76 ± 0.05 ab 0.321 ± 0.001 ab 41.0 ± 4.4 b 12.10 ± 3.47 a 18.5 ± 6.3 a 22.3 ± 7.2 a 56.5 ± 1.5 bc 9.7 ± 3.4 c
CD 70 1 0.013 1.08 420 - 0.0059 0.9997 5.19 ± 0.43 b 0.282 ± 0.009 b 36.7 ± 1.8 c 8.02 ± 2.21 b 13.1 ± 2.0 ab 15.4 ± 2.9 c 58.7 ± 3.1 b 13.8 ± 2.7 b
VMD 240 1 0.053 1.02 - 112 0.0089 0.9988 8.24 ± 0.29 a 0.366 ± 0.030 a 34.4 ± 2.5 d 7.88 ± 2.03 b 9.2 ± 3.1 b 12.1 ± 3.7 d 49.1 ± 2.3 d 18.0 ± 4.0 a
VMD 360 1 0.072 1.03 - 81 0.0142 0.9970 7.06 ± 0.58 a 0.352 ± 0.070 a 33.4 ± 0.7 d 7.55 ± 0.91 b 7.6 ± 0.5 c 10.7 ± 1 e 45.4 ± 1.4 d 19.8 ± 0.9 a
VMD 480 1 0.079 1.13 - 48 0.0098 0.9987 7.49 ± 0.09 a 0.336 ± 0.012 a 36.0 ± 1.3 c 8.30 ± 0.39 b 10.8 ± 2.1 b 13.7 ± 1.9 cd 52.2 ± 4.1 c 15.6 ± 2.3 a
CPD-VMFD 0.086 0.259 0.729 180 30 0.0046 0.9595 6.39 ± 0.23 ab 0.303 ± 0.016 ab 39.7 ± 0.1 b 8.94 ± 0.95 ab 15.7 ± 0.2 ab 18.0 ± 0.7 b 60.3 ± 2.3 b 9.7 ± 0.9 c

± Freeze drying (FD), convective drying (CD) at 50 °C (CD 50), 60 °C (CD 60) and 70 °C (CD 70); vacuum-microwave drying (VMD) at 240 W (VMD 240), 360 W (VMD 360) and 480 W (VMD 480) and combined drying (CPD-VMFD). ¥ Mean values followed by different letter, within the same column, were significantly different (p < 0.05). RMSE: root mean square error.; λ “-“ means no data available of this parameters.