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Table 3 The antioxidant activities demonstrated by Streptomyces sp. MUM265 extract and positive controls in different antioxidant assays

From: Mangrove derived Streptomyces sp. MUM265 as a potential source of antioxidant and anticolon-cancer agents

Concentration of extract / positive controls (μg/mL)

Antioxidant activities

DPPH radical scavenging activity (%)

ABTS radical scavenging activity (%)

Superoxide dismutase-like activity (%)

Metal-chelating activity (%)

MUM265 extract

 62.5

NDa

5.31 ± 2.21

9.73 ± 5.72*

12.57 ± 2.10*

 125

NDa

9.40 ± 3.17*

16.84 ± 4.48*

18.55 ± 1.13*

 250

1.22 ± 1.47

16.42 ± 4.20*

17.67 ± 2.52*

22.53 ± 0.70*

 500

9.43 ± 1.58*

24.29 ± 4.01*

24.20 ± 1.98*

24.32 ± 3.56*

 1000

24.70 ± 3.12*

46.56 ± 4.95*

28.59 ± 1.79*

28.86 ± 6.27*

 2000

33.69 ± 3.36*

59.13 ± 6.14*

37.25 ± 0.21*

34.06 ± 1.28*

 4000

42.33 ± 3.98*

88.50 ± 0.37*

55.99 ± 1.03*

46.02 ± 0.86*

Gallic acid

 6.25

32.13 ± 5.48*

–

–

–

 12.5

–

85.77 ± 4.50*

–

–

Catechin

 0.3

–

–

52.27 ± 6.27*

–

EDTA

 62.5

–

–

–

53.32 ± 4.57*

  1. *statistically significance (P < 0.05) when compared to control (without extract)
  2. aND not detected