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Testes of rats on Day 3 (A–C) and Day 61 (D–F) following 56MnO2 powder or 60Co-γ exposure. There were no significant histological alternations in the testes among the groups: Mn56×3 (A,D); Co-60 (B,E); and the control (C,F). HE staining, original magnification 20×.
