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. 2015 Sep 25;20(10):17747–17759. doi: 10.3390/molecules201017747

Figure 2.

Figure 2

1,1-Diphenyl-2-picrylhydrazyl (DPPH) reduction by P. major hydroethanolic extract (PmHE). DPPH solution was incubated with different concentrations of P. major extracts and absorbance was measured at 517 nm (closed squares). Quercetin (0.1 mg/mL) was used as standard (closed circle). The results were expressed as percentage in relation to DPPH solution, considered as 100%. Inset: Electron paramagnetic resonance (EPR) spectra of DPPH radical obtained in the absence of the extract (control) or in the presence of 0.1 mg/mL PmHE.