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. 2017 Sep 12;12(9):e0183983. doi: 10.1371/journal.pone.0183983

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© 2017 Bonamigo et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 2 — Concentrations of malondialdehyde (nmol/mL) after incubation of human erythrocytes with ascorbic acid (standard antioxidant) and ethanolic extracts of propolis from P. droryana (ExEP-P) and A. mellifera (ExEP-A), induced by oxidizing agent AAPH at (A) 120 (B) 180 and (C) 240 min of evaluation. NaCl (0.9%) and 1% ethanol was employed as negative controls. The results are expressed as mean ± SEM (standard error of the mean), n = 3. *Significantly different (p < 0.05) compared to the AAPH control group. With the exception of the negative control, all treatments were incubated with the oxidizing agent AAPH.