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Table 3 EC50 values (concentration causing 50% inhibition) in various antioxidant assays and FRAP potential of Acacia hydaspica polyphenols

From: Antioxidant activity of polyphenolic compounds isolated from ethyl-acetate fraction of Acacia hydaspica R. Parker

Compounds

DPPH radical

EC50 (µM)

Hydroxyl radical

EC50 (µM)

Nitric oxide

EC50 (µM)

FRAP

µM Fe(II)/g

% (dry weight of AHE extract)

Flavan-3ols

 C1

1.60 ± 0.035a

4.33 ± 0.618b

6 ± 0.346a

649.5 ± 1.511a

18.75

 C2

6.24 ± 0.254b

8.0 ± 0.635a

12.3 ± 0.376b

432.9 ± 0.94b

10.01

Phenol compound

 C3

2.9 ± 0.318a

6.25 ± 0.577a

7.67 ± 0.577a

505.5 ± 2.512c

3.75

Standard reference

 BHT

–

0.781 ± 0.115c

–

–

–

 Ascorbic acid

36.3 ± 0.569d

–

–

–

–

 Rutin

–

–

53 ± 1.155c

–

–

 Gallic acid

9.1 ± 0.421c

9.67 ± 0.577a,d

–

49.5 ± 2.211c

–

  1. Values are expressed as mean ± SEM (n = 3); means with superscript with different letters (a–d) in the row are significantly (p < 0.01) different from each other. Data analyzed by using one way ANOVA followed by Tukeys multiple comparison tests