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Table 3 Free Radical Scavenging activity by DPPH assay

From: Thai plants with high antioxidant levels, free radical scavenging activity, anti-tyrosinase and anti-collagenase activity

Extract Percent Scavenging Activity (%) mg VCEAC/g dry weight
Petroleum ether Dichloromethane Ethanol Petroleum ether Dichloromethane Ethanol
Annona squamosa L. NA 17.91 ± 0.88 94.01 ± 0.40 NA 3.08 ± 0.29 23.60 ± 0.62
Ardisia elliptica Thunb. 49.29 ± 1.29 71.35 ± 6.11 96.17 ± 0.05 12.09 ± 0.94 20.23 ± 0.99 24.93 ± 0.19
Croton roxburghii N.P.Balakr 8.34 ± 0.57 15.79 ± 1.21 36.89 ± 1.37 1.03 ± 0.09 2.38 ± 0.13 8.45 ± 0.84
Croton sublyratus Kurz 7.11 ± 0.59 14.34 ± 0.65 27.64 ± 0.91 0.67 ± 0.07 1.85 ± 0.06 5.29 ± 0.30
Datura metel L. 14.67 ± 1.10 14.85 ± 0.64 28.72 ± 0.67 2.00 ± 0.12 2.30 ± 0.06 5.83 ± 0.26
Garcinia mangostana Linn. 28.90 ± 0.99 80.87 ± 0.47 94.54 ± 0.15 6.18 ± 0.33 20.42 ± 0.20 24.28 ± 0.20
Gynura pseudochina (L.) DC. NA 11.90 ± 0.71 13.54 ± 0.67 NA 1.49 ± 0.03 1.82 ± 0.13
Hibiscus mutabilis L. NA NA 26.28 ± 0.93 NA NA 4.29 ± 0.21
Ipomoea pes-caprae (L.) R.br. NA 16.27 ± 0.14 64.06 ± 1.23 NA 2.49 ± 0.19 16.79 ± 0.41
Phyllanthus acidus (L.) Skeels NA 17.64 ± 1.05 94.17 ± 0.61 NA 3.06 ± 0.28 23.84 ± 0.73
Rhinacanthus nasutus (L.) Kurz 7.38 ± 0.46 15.35 ± 1.27 29.63 ± 1.41 1.01 ± 0.08 2.32 ± 0.21 6.50 ± 0.16
Senna alata (L.) Roxb. 11.18 ± 0.99 17.99 ± 0.61 63.74 ± 0.54 1.48 ± 0.14 3.13 ± 0.31 15.35 ± 0.13
Stemona curtisii Hook.f. NA NA 93.63 ± 0.22 NA NA 23.55 ± 0.55
Streblus asper Lour. NA 14.65 ± 0.92 45.14 ± 0.67 NA 1.94 ± 0.13 10.45 ± 0.30
  1. Each value is mean ± S.D. of triplicate independent analyses. Calculations of values are described in the Materials and Methods section. VCEAC is Vitamin C Equivalent Antioxidant capacity, and NA denotes not available