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. 2013 Feb 7;8(2):e54618. doi: 10.1371/journal.pone.0054618

Figure 3. Assessment of the free radical-scavenging activity of the BHE extract of U. tomentosa (A), as well as its two resulting fractions: BuOH (B) and CHCl3 (C) at various concentrations.

Figure 3

Negative control was distilled water and positive control was ascorbic acid (50 µg.mL−1). Symbols: **p<0.01 and ***p<0.001 as compared to the negative control.