The oxygen transfer rate influences the molecular mass of the alginate produced by Azotobacter vinelandii

A. Díaz-Barrera, C. Peña, E. Galindo

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

41 Citas (Scopus)

Resumen

The influence of oxygen transfer rate (OTR) on the molecular mass of alginate was studied. In batch cultures without dissolved oxygen tension (DOT) control and at different agitation rates, the DOT was nearly zero and the OTR was constant during biomass growth, hence the cultures were oxygen-limited. The OTR reached different maximum levels (OTRmax) and enabled to establish various relative respiration rates. Overall, the findings showed that OTR influences alginate molecular mass. The mean molecular mass (MMM) of the alginate increased as OTRmax decreased. The molecular mass obtained at 3.0 mmol l-1 h-1 was 7.0 times higher (1,560 kDa) than at 9.0 mmol l-1 h-1 (220 kDa). An increase in molecular mass can be a bacterial response to adverse nutritional conditions such as oxygen limitation.

Idioma originalInglés
Páginas (desde-hasta)903-910
Número de páginas8
PublicaciónApplied Microbiology and Biotechnology
Volumen76
N.º4
DOI
EstadoPublicada - sept. 2007
Publicado de forma externa

Huella

Profundice en los temas de investigación de 'The oxygen transfer rate influences the molecular mass of the alginate produced by Azotobacter vinelandii'. En conjunto forman una huella única.

Citar esto