[1] Univ Fed Rio Grande do Sul UFRGS, Programa Posgrad Ciencias Farmaceut, BR-90610000 Porto Alegre, RS, Brazil
[2] Univ Fed Rio Grande do Sul, Programa Posgrad Nanotecnol Farmaceut, BR-90610000 Porto Alegre, RS, Brazil
[3] Embrapa Suinos & Aves, BR-89715899 Concordia, Brazil