1. Pontifícia Universidade Católica de Campinas, Faculty of Chemistry, Rod. D. Pedro I, Km 136, 13086-900, Campinas, SP, Brazil.
2. State University of Campinas, Faculty of Food Engineering, Food Science Department, 13083-970, Campinas, SP, Brazil.
3. Corresponding author. E-mail: jpallone@fea.unicamp.br