1. LASEFI, DEA/FEA (College of Food Engineering), UNICAMP (State University of Campinas), Caixa Postal 6121, 13083-970, Campinas, SP, Brazil, and CPQBA, Centro Pluridisciplinar de Pesquisas Químicas, Biológicas e Agrícolas, Estrada PLN 393, 999 Vila Betel, Caixa Postal 6171, 13081-970 Paulínia, São Paulo, Brazil