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Table 3 Free radical scavenging potential of Newbouldia laevis measured as % inhibition

From: In vitro antioxidant capacity and free radical scavenging evaluation of active metabolite constituents of Newbouldia laevis ethanolic leaf extract

Antioxidant activity (% Inhibition )

Conc (μg/ml)

Hydroxyl radical (OH . )

Superoxide anion (O 2 .- )

Iron chelating

Nitric oxide radical (NO)

Peroxynitrite (ONOO − )

Singlet oxygen ( 1 O 2 )

Hypochlorous acid (HOCl)

DPPH

Lipid peroxidation (LPO)

FRAP (mM)

10

25.80 ± 0.03a

30.60 ± 0.05a

40.10 ± 0.02a

41.06 ± 0.04a

15.60 ± 0.01a

53.64 ± 0.72a

09.60 ± 0.12a

42.64 ± 1.12a

53.64 ± 0.82 a

08.07 ± 0.31a

50

28.85 ± 0.01a

40.65 ± 0.04b

46.58 ± 0.04a

49.75 ± 0.08b

25.85 ± 0.04b

59.10 ± 0.09a

25.85 ± 0.31b

45.85 ± 0.10a

65.85 ± 0.09a 1

18.10 ± 0.11a

100

50.83 ± 0.11b

62.74 ± 0.12c

65.38 ± 0.07b

55.13 ± 0.09b

35.83 ± 0.09c

71.62 ± 2.46b

35.83 ± 0.05c

65.85 ± 0.11b

85.85 ± 0.14b

30.15 ± 0.15b

200

62.97 ± 0.04c

69.79 ± 0.08c

71.67 ± 0.09c

61.86 ± 0.07c

48.97 ± 0.09d

86.16 ± 1.10c

48.97 ± 0.09d

79.85 ± 0.19c

89.85 ± 0.16b

50.09 ± 1.20c

400

76.10 ± 0.02d

81.11 ± 0.07d

90.11 ± 0.08d

80.08 ± 0.06d

62.10 ± 0.11e

96.00 ± 0.12d

62.10 ± 0.11e

85.85 ± 0.18c

91.85 ± 0.34c

64.01 ± 2.52d

  1. Data are expressed as mean ± standard deviation (n = 6); mean in the same column with different superscripts are significantly different using Duncan’s multiple range test at p <0.05.