Brazilian Archives of Biology and Technology v.53 n.2 2010 Brazilian Archives of Biology and Technology Instituto de Tecnologia do Paraná (Tecpar) instacron:TECPAR Brazilian Archives of Biology and Technology, Vol 53, Iss 2, Pp 425-430 (2010) Brazilian Archives of Biology and Technology, Volume: 53, Issue: 2, Pages: 425-430, Published: APR 2010