[1] Univ Fed Rio Grande do Sul, Fac Farm, Programa Posgrad Ciencias Farmaceut, BR-90610000 Porto Alegre, RS, Brazil
[2] Univ Fed Ceara, Dept Fis, BR-60455970 Fortaleza, Ceara, Brazil
[3] Univ Fed Rio Grande do Sul, Inst Ciencias Basicas Saude, Dept Bioquim, BR-90035003 Porto Alegre, RS, Brazil