Stabilization of natural dyes from Euterpe oleracea Mart. by intercalation between niobium lamellar oxide - Teixeira-Neto, Angela A.; Shiguihara, Ana Lucia; Izumi, Celly Mieko Shinohara; Bizeto, Marcos Augusto; Temperini, Márcia Laudelina Arruda; Constantino, Vera Regina Leopoldo (LNLS 2007 Activity Report (Brazilian Synchrotron Light Laboratory), 2008)