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Table 2 Effect of storage time and temperature on antioxidant activities and IC50 value of ginger varieties

From: Changes in antioxidant and antibacterial activities as well as phytochemical constituents associated with ginger storage and polyphenol oxidase activity

 

Storage time (month)/temperature

DPPH (%)

FRAP (μM of Fe (II)/g DM)

IC50 (DPPH)

Halia Bentong

fresh

41.7 ± 1.33b

488.3 ± 29.56b

39.2 ± 1.50f

4/(5 °C)

41.0 ± 1.49b

462.8 ± 24.33b

39.3 ± 1.22f

8/(5 °C)

30.4 ± 1.58d

371.2 ± 28.16e

42.4 ± 1.29e

4/(15 °C)

22.4 ± 1.04f

266.7 ± 18.76f

51.4 ± 1.42c

8/(15 °C)

14.7 ± 0.44h

176.1 ± 14.29g

66.7 ± 1.19a

Halia Bara

fresh

49.7 ± 1.88a

537.4 ± 28.76a

29.4 ± 1.59h

4/(5 °C)

47.6 ± 1.29a

511.3 ± 32.16a

29.8 ± 1.26h

8/(5 °C)

33.4 ± 1.16c

422.1 ± 24.38c

33.4 ± 1.13g

4/(15 °C)

24.7 ± 1.77e

327.6 ± 20.19d

46.7 ± 1.75d

8/(15 °C)

16.9 ± 0.93g

244.5 ± 18.46f

55.2 ± 1.06b

Gallic acid

 

76.1 ± 2.16

644.5 ± 30.52

24.6 ± 1.05

Quercetin

 

82.4 ± 2.44

729.2 ± 32.16

15.9 ± 1.27

  1. Data are means of triplicate measurements ± standard deviation. Means not sharing a common single letter in each column for each measurement were significantly different at p < 0.05