Table 5 The color parameters of dried rose petals under different drying pretreatments. Note: Values with the same superscript are not significantly different (p > 0.05).

From: Effect of combined ethanol and ultrasound pretreatment on energy consumption and bioactive compounds of rose petals in hot air drying

Pretreatment

L*

a*

b*

ΔE

Fresh

40.65 ± 0.70a

14.86 ± 0.32a

1.78 ± 0.12cd

-

Control

31.36 ± 0.78d

19.22 ± 0.72d

4.11 ± 0.13a

10.53 ± 1.07c

US10

34.26 ± 0.55c

21.54 ± 0.91c

1.39 ± 0.21de

9.50 ± 0.52c

US30

35.84 ± 2.30bc

19.78 ± 0.83d

1.02 ± 0.55e

7.09 ± 0.41d

ET10

28.51 ± 0.53e

23.30 ± 0.90b

3.64 ± 0.30ab

14.89 ± 1.37b

ET30

25.48 ± 1.10f

24.88 ± 0.55a

3.50 ± 0.39b

18.28 ± 0.77a

ET/US

36.70 ± 0.34b

21.84 ± 0.32c

2.23 ± 0.20c

7.79 ± 0.43d