Table 4.
Plant tested | Free radical scavenging activity1) | |
---|---|---|
| ||
Solvent fraction | EC50 value (mg/mL) | |
Poncirus trifoliata fruit (Makrut) | Methanol | 1.47±0.4222) |
Zingiber officinale Rosc (Khing) | n-Hexane | 2.23±1.48 |
Chloroform | 1.23±0.39 | |
Ethylacetate | ND | |
Buthanol | 1.10±0.40 | |
Areca catechu L. (Mak) | Methanol | 1.06±0.11 |
Water | 2.11±0.49 | |
Buthanol | ND | |
Solanum melongena L. (Makkhuayao) | Buthanol | 1.85±0.27 |
Solanum melongena L. (Makhuapro) | Buthanol | 1.66±0.14 |
ND, not detected; DPPH, 2-diphenyl-2-picryl hydrazyl; BHT, tert-butyl hydroxytoluene.
Free radical scavenging activity was determined by DPPH photometric assay and described in EC50 value which means the concentration at 50% of antioxidant activity. BHT was used as a positive control showy EC50 of 0.3±0.04 mg/mL.
Mean±standard error (n = 3).