%0 Journal Article
%T Caracteriza£¿£¿o qu¨ªmica dos g¨¦is produzidos pelas bact¨¦rias diazotr¨®ficas Rhizobium tropici e Mesorhizobium sp.
%A Monteiro
%A Nilson Kobori
%A Aranda-Selverio
%A Gabriel
%A Exposti
%A Diego Tadeu Degli
%A Silva
%A Maria de Lourdes Corradi da
%A Lemos
%A Eliana Gertrudes Macedo
%A Campanharo
%A Jo£¿o Carlos
%A Silveira
%A Joana L¨¦a Meira
%J Qu¨ªmica Nova
%D 2012
%I Sociedade Brasileira de Qu¨ªmica
%R 10.1590/S0100-40422012000400009
%X the exopolysaccharides with characteristics of gel produced by rhizobium tropici (epsrt) and mesorhizobium sp (epsmr) are acidic heteropolysaccharide composed mainly of glucose and galactose in a molar ratio of 4:1 and 5:1 respectively, with traces of mannose (~ 1%). chemical analysis showed the presence of uronic acid, pyruvate and acetyl-substituents in the structures of both polymers. experiments of gel permeation chromatography and polyacrylamide gel electrophoresis showed that epsrt and epsmr are homogeneous molecules with low grade of polydispersity. the eps were characterized using spectroscopic techniques of ft-ir, 1h and 13c-nmr.
%K acid exopolysaccharide
%K rhizobium tropici
%K mesorhizobium sp.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0100-40422012000400009&lng=en&nrm=iso&tlng=en