Manipulating the molecular weight of alginate produced by Azotobacter vinelandii in continuous cultures.
Bioresour Technol
; 101(23): 9405-8, 2010 Dec.
Article
em En
| MEDLINE
| ID: mdl-20675122
Alginate production by Azotobacter vinelandii in chemostat cultures was evaluated at different dilution rates (D) and inlet sucrose concentrations of 5 and 20 g l(-1). At the low inlet sucrose concentration, the molecular weight of alginate increased from 800 to 1800 kDa when D increased from 0.05 to 0.10 h(-1), whereas the opposite trend was observed with the high inlet sucrose concentration. This behaviour can be explained by changes in specific sucrose uptake rate. Thus, a decrease in alginate molecular weight was dependent on the specific sucrose uptake rate when this rate was higher than 0.42 g g(-1) h(-1). The manipulation of the D can be used to select the molecular weight of alginate in continuous culture.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Azotobacter vinelandii
/
Técnicas de Cultura de Células
/
Alginatos
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Chile
País de publicação:
Reino Unido