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Table 1 Color values of blueberry pomace under different drying processes A,B,C

From: Effects of four drying methods on the quality, antioxidant activity and anthocyanin components of blueberry pomace

Drying process

L

a

b

ΔE

Control

14.86 ± 0.04 h

9.23 ± 0.03e

-0.78 ± 0.03 g

 

HAD(40 °C)

31.85 ± 0.09e

9.69 ± 0.01d

4.62 ± 0.06e

22.35 ± 0.31e

HAD(50 °C)

34.04 ± 0.08c

9.67 ± 0.02d

4.90 ± 0.02d

22.83 ± 0.38d

HAD(60 °C)

29.72 ± 0.37 g

7.97 ± 0.02f

5.12 ± 0.01c

25.08 ± 0.08c

HAD(70 °C)

30.43 ± 0.40f

7.47 ± 0.05 g

5.64 ± 0.02b

27.09 ± 0.06b

FD

35.51 ± 0.30a

10.82 ± 0.02c

4.08 ± 0.01f

28.59 ± 0.27a

MVD

32.71 ± 0.42d

16.62 ± 0.12b

5.64 ± 0.09b

17.9 ± 0.10 g

MFD

34.67 ± 0.03b

17.33 ± 0.05a

6.32 ± 0.03a

19.25 ± 0.05f

  1. A: Data are mean ± S.D. Mean values within the same column with different superscript letters are significantly different (P < 0.05) using ANOVA with Duncan’s multiple comparison test, n = 3
  2. B: L: brightness/darkness; a: Greenness/redness; b: Yellowness/blueness; ΔE: color change
  3. C: HAD Hot air drying (40, 50, 60, and 70 °C), FD Freeze drying, MVD Microwave vacuum drying, and MFD Microwave freeze vacuum drying