Logo do repositório
 

Caracterização química dos géis produzidos pelas bactérias diazotróficas Rhizobium tropici e Mesorhizobium sp.

Resumo

The exopolysaccharides with characteristics of gel produced by Rhizobium tropici (EPS RT) and Mesorhizobium sp (EPS MR) 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 EPS RT and EPS MR are homogeneous molecules with low grade of polydispersity. The EPS were characterized using spectroscopic techniques of FT-IR, ¹H and 13C-NMR.

Descrição

Palavras-chave

Acid exopolysaccharide, Rhizobium tropici, Mesorlazobium sp.

Idioma

Português

Citação

Quimica Nova. São Paulo: Soc Brasileira Quimica, v. 35, n. 4, p. 705-708, 2012.

Itens relacionados

Unidades

Departamentos

Cursos de graduação

Programas de pós-graduação