Federal;
University;
of;
Rio;
Grande;
do;
Norte,;
Center;
of;
Technology,;
Chemical;
Engineering;
Department,;
Biochemical;
Engineering;
Laboratory,;
Campus;
Universitario,;
Lagoa;
Nova,;
3000,;
CEP.'59072-970;
Natal,;
Rio;
Grande;
do;
Norte,;
Brazil;