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Table 1 Half maximal inhibitory concentration (IC 50 ) of SSME and standards for different antioxidant and free radical scavenging assays

From: Chemical characterization and assessment of antioxidant potentiality of Streptocaulon sylvestre Wight, an endangered plant of sub-Himalayan plains of West Bengal and Sikkim

Parameters

SSME

Standard

DPPH

4.91 ± 0.57**

83.80 ± 7.27 (ascorbic acid)

Hydroxyl radical

113.06 ± 5.67***

589.06 ± 46.57 (mannitol)

Superoxide anion

63.93 ± 4.16***

121.41 ± 5.72 (quercetin)

Nitric oxide

101.62 ± 4.70***

80.46 ± 3.10 (curcumin)

Hydrogen peroxide

25.48 ± 3.13***

3.17 ± 0.14 (sodium pyruvate)

Peroxynitrite

0.90 ± 0.07**

0.73 ± 0.02 (gallic acid)

Singlet oxygen

196.36 ± 12.58***

48.40 ± 1.81 (lipoic acid)

Hypochlorous acid

142.14 ± 6.13*

165.91 ± 16.31 (ascorbic acid)

Total antioxidant activity

252.74 ± 17.54***

150.01 ± 7.31 (ascorbic acid)

Iron chelation

361.80 ± 12.05***

1.45 ± 0.04 (EDTA)

Lipid peroxidation

26.07 ± 3.15***

11.11 ± 0.22 (trolox)

  1. Units in μg/ml, except H2O2, peroxynitrite scavenging and iron chelating where the units are mg/ml. Data expressed as mean ± S.D (n = 6). *p < 0.05; **p < 0.01; ***p < 0.001 vs standard.