Fig. 9
From: Insights into the pharmaceutical properties of green fabricated Iron oxide nanoparticles

Antioxidant activity of A. cepa extract and Fe3O4-NPs. (A) DPPH assay, (B) ABTS assay. The concentration of Fe3O4-NPs was 25–200 µg/ml. Data were represented as mean ± SD of 3 independent experiments.