Natural antioxidants from açaí fruit and from annatto seeds immobilized in biocompatible inorganic layered matrices - Ferreira, Ana Maria da Costa; Constantino, Vera Regina Leopoldo; Teixeira Neto, Angela Albuquerque; Teixeira-Neto, Angela Albuquerque; Silva, Felipe F. da; Perotti, Gustavo Frigi; Couto, Ricardo Alexandre Alves de (Free Radicals and Antioxidants; Meeting of the Society for Free Radical Biology and Medicine, 2009)