Journal of the Brazilian Chemical Society, Vol 13, Iss 2, Pp 140-150 (2002) Journal of the Brazilian Chemical Society, Volume: 13, Issue: 2, Pages: 140-150, Published: 2002 Journal of the Brazilian Chemical Society v.13 n.2 2002 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ