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

Monteiro, Nilson Kobori [UNESP]; Aranda-Selverio, Gabriel [UNESP]; Exposti, Diego Tadeu Degli [UNESP]; Silva, Maria de Lourdes Corradi da [UNESP]; Lemos, Eliana Gertrudes Macedo [UNESP]; Campanharo, João Carlos [UNESP]; Silveira, Joana Léa Meira

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

Arquivos

S0100-40422012000400009.pdf (368.28 KB)

Data

2012-01-01

Autores

Monteiro, Nilson Kobori

Aranda-Selverio, Gabriel

Exposti, Diego Tadeu Degli

Silva, Maria de Lourdes Corradi da

Lemos, Eliana Gertrudes Macedo

Campanharo, João Carlos

Silveira, Joana Léa Meira

Editor

Sociedade Brasileira de Química

Tipo

Artigo

Direito de acesso

Acesso aberto

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.