1. Food Engineering Graduate ProgramFederal Univ. of Paraná, Polytechnic Center 81531–980 Curitiba Brazil
2. Chemical Engineering Dept.Federal Univ. of Paraná, Polytechnic Center 81531–980 Curitiba Brazil
3. Regional Research Center of CuritibaAgronomic Inst. of Paraná 82630–900 Curitiba Brazil