Brazilian Archives of Biology and Technology, Vol 53, Iss 3, Pp 575-582 (2010) Brazilian Archives of Biology and Technology, Volume: 53, Issue: 3, Pages: 575-582, Published: JUN 2010 Brazilian Archives of Biology and Technology v.53 n.3 2010 Brazilian Archives of Biology and Technology Instituto de Tecnologia do Paraná (Tecpar) instacron:TECPAR