In vivo antioxidant activity of a semipurified fraction of pothomorphe umbellata hydroalcoholic extract - Barros, Silvia Berlanga de Moraes; Tamashiro, V; Solitao, C R; Aznar, A E; Freitas, Paulo Chanel Deodato de (Reuniao Anual da Sociedade Brasileira de Bioquimica e Biologia Molecular, 1994)