Table 1

Scavenging activity of P. viridiflorum (bark) and G. bicolor (leaf) acetone extracts

Sample

DPPH

Nitric oxide

Reducing power

Hydrogen peroxide


IC50a

R2 b

IC50

R2

IC50

R2

IC50

R2


P. viridiflorum

0.22

95.70

0.16

39.10

0.26

83.20

0.13

89.90

G. bicolor

0.27

91.80

0.22

93.60

0.27

99.90

0.23

92.20

Vitamin C

0.05

73.90

0.24

96.10

0.22

92.40

0.29

92.50

Rutin

0.08

30.50

0.25

99.30

-

-

-

-

BHT

-

-

-

-

0.23

95.90

-

-

Gallic acid

-

-

-

-

-

-

0.15

55.90


a: IC50 is defined as the concentration (μg/ml) sufficient to obtain 50% of a maximum scavenging capacity.

b: coefficient of determination; values obtained from regression lines with 95% confidence level.

-: Values not determined

Otang et al. BMC Complementary and Alternative Medicine 2012 12:43   doi:10.1186/1472-6882-12-43

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