Properties of biodegradable films made with proteins extracted from castor bean (Ricinus communis) cake: effect of protein extraction pH - Bittante, Ana Mônica Quinta Barbosa; Lacerda, Roseli Sengling; Oliveira, Tiara Gomes de; Makishi, Gisele Lourenço da Aparecida; Costa, Patrícia Argemira da; Chambi Mamani, Hulda Noemi; Gomide, Catarina Abdalla; Sobral, Paulo José do Amaral (Chemical Engineering Transactions, 2014)