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Table 1 Radical scavenging activities of the stem bark extract of S. roxburghii

From: Antioxidant activity of the stem bark of Shorea roxburghii and its silver reducing power

  DPPH radical scavenging activity (%)
Concentrations SAE IC50 SME IC50 Vitamin C IC50
μg/mL   (μg/mL)   (μg/mL)   (μg/mL)
20 26.96 ± 0.09   19.75 ± 0.15   12.67 ± 0.06  
40 29.56 ± 0.12   26.26 ± 0.07   44.16 ± 0.21  
60 34.37 ± 0.15 na* 31.72 ± 0.09 na* 74.42 ± 0.12 45.74
80 39.33 ± 0.15   38.54 ± 0.12   89.51 ± 0.09  
100 43.94 ± 0.12   42.78 ± 0.15   97.13 ± 0.06  
  Hydroxyl radical scavenging activity (%)
20 29.89 ± 0.59   28.80 ± 0.40   30.46 ± 0.78  
40 44.97 ± 0.13   47.80 ± 0.30   44.44 ± 0.39  
60 52.59 ± 0.27 52.56 58.08 ± 0.08 50.93 63.66 ± 0.26 45.91
80 67.41 ± 0.46   65.45 ± 0.20   73.73 ± 0.52  
100 75.16 ± 0.35   74.25 ± 0.92   86.27 ± 0.13  
  ABTS radical scavenging activity (%)
20 20.77 ± 0.92   19.60 ± 1.40   28.28 ± 1.20  
40 45.07 ± 0.61   19.60 ± 1.40   46.40 ± 0.40  
60 56.13 ± 1.01 55.24 58.13 ± 0.61 55.96 69.73 ± 0.92 43.05
80 65.20 ± 0.80   64.40 ± 0.40   83.47 ± 0.46  
100 79.20 ± 1.06   86.27 ± 1.22   97.96 ± 0.04  
  Hydrogen peroxide scavenging activity (%)
20 24.24 ± 0.38   15.65 ± 0.60   41.88 ± 0.68  
40 32.34 ± 0.30   35.22 ± 0.62   58.17 ± 0.56  
60 46.45 ± 0.23 87.18 50.27 ± 0.31 63.67 72.33 ± 0.52 28.53
80 25.77 ± 0.34   63.39 ± 0.52   81.27 ± 0.31  
100 67.06 ± 0.45   73.47 ± 0.39   90.71 ± 0.38  
  Ferric reducing power (OD)*
20 0.078 ± 0.008   0.139 ± 0.006   0.216 ± 0.002  
40 0.165 ± 0.004   0.235 ± 0.005   0.387 ± 0.005  
60 0.205 ± 0.007 na* 0.347 ± 0.007 na* 0.568 ± 0.007 52.19
80 0.258 ± 0.008   0.431 ± 0.001   0.767 ± 0.013  
100 0.376 ± 0.006   0.479 ± 0.009   0.918 ± 0.007  
  1. OD* Increasing the optical density: na*-Not available.