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Effect of co-treatment of graphene oxide (GO) or reduced graphene oxide (rGO) with colored grain extract on cell viabilities in B3 cells. B3 cells were co-treated with (A) BRGE extract (BRGEx) and GO, (B) BRGE extract (BRGEx) and rGO, (C) soybean extract (SBx) and GO, (D) soybean extract (SBx) and rGO at the indicated dose for 24 h (black bar) or 48 h (gray bar), and then cell viabilities were determined using an MTT assay. * p < 0.05 vs. vehicle-treated cells.
