Skip to main content

Table 3 Antioxidant activity (%) of crude and fractionated extracts at various concentrations assayed by β-carotene bleaching assay

From: Antioxidant potential, cytotoxic activity and total phenolic content of Alpinia pahangensis rhizomes

Concentrations (mg/ml)

Antioxidant activity of crude methanol extract and its fractions

 
 

Methanol extract

Hexane fraction

Ethyl acetate fraction

Water fraction

BHA

4

66.06 ±0.63dw

23.92 ±4.46aw

59.64 ± 1.44cw

50.03 ± 2.67bw

81.51 ± 0.67ew

8

74.73 ±1.84cx

42.17 ± 3.41ax

72.35 ± 2.30cx

57.54 ± 1.83bx

84.50 ± 0.21dx

16

77.84 ±0.41cy

52.62 ± 2.21ay

72.87 ± 1.73bx

71.74 ± 1.80by

89.54 ± 0.27dy

20

81.21 ±0.91cz

56.80 ± 2.70ay

74.51 ± 0.53bx

74.79 ± 1.56by

92.92 ± 0.23dz

  1. Values expressed are mean ± standard deviation of triplicate measurements. For the same extract or standard with different concentrations, means in the same column with different letters (w-z) were significantly different (p < 0.05, ANOVA). For different extracts with the same concentration, means in the same row with different letters (a-e) were significantly different (p < 0.05, ANOVA). BHA was used as the standard.