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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