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Table 1 Radical scavenging activity of six parts of A. zerumbet extracts on DPPH, ABTS and PMS-NADH superoxide

From: Effect of Alpinia zerumbet components on antioxidant and skin diseases-related enzymes

Sample

Extraction

Inhibitory effect (IC50; μg/mL)

DPPH

ABTS

PMS-NADH

BHT

 

11.74 ± 0.15 a 1

14.26 ± 0.16 a

24.80 ± 0.98 a

Rhizome

Aqueous

25.31 ± 0.67 b

73.94 ± 1.23 b

64.70 ± 0.72 c

Ethanol

145.07 ± 1.68 e

155.86 ± 4.09 f

113.37 ± 1.24 d

Stem

Aqueous

144.03 ± 0.27 e

127.97 ± 1.70 d

215.09 ± 0.28 h

Ethanol

293.08 ± 0.17 g

223.17 ± 0.26 i

132.27 ± 1.33 e

Leaf

Aqueous

165.60 ± 0.44 f

143.77 ± 1.37 e

191.24 ± 0.20 g

Ethanol

586.47 ± 0.77 j

206.65 ± 0.85 h

168.23 ± 4.77 f

Flower

Aqueous

132.19 ± 1.02 c

140.50 ± 1.18 e

117.32 ± 1.46 d

Ethanol

559.01 ± 3.61 h

293.90 ± 3.64 k

210.50 ± 4.03 h

Pericarp

Aqueous

140.91 ± 0.30 de

163.41 ± 1.07 g

169.02 ± 1.01 f

Ethanol

580.38 ± 0.26 i

246.71 ± 0.85 j

166.11 ± 0.52 f

Seed

Aqueous

10.33 ± 0.03 a

84.29 ± 0.72 c

58.55 ± 0.31 b

Ethanol

136.63 ± 0.33 cd

137.92 ± 1.74 e

56.12 ± 1.08 b

  1. 1 The data represent the means ± SD of three determinations. Values with the same letter are not significantly different (p = 0.01) from each other.