Brazilian Archives of Biology and Technology v.55 n.3 2012 Brazilian Archives of Biology and Technology Instituto de Tecnologia do Paraná (Tecpar) instacron:TECPAR Brazilian Archives of Biology and Technology, Vol 55, Iss 3, Pp 471-476 (2012) Brazilian Archives of Biology and Technology, Volume: 55, Issue: 3, Pages: 471-476, Published: JUN 2012