Abstract:
:Alginate production by Azotobacter vinelandii growing in chemostat cultures was evaluated under different O(2) transfer rates (OTR). As a result of modifying the culture's agitation rate from 300 to 500 rpm, the OTR increased from 9 to 15.1 mmol l(-1) h(-1) and a slight variation in the alginate production (1.7-2.2 g l(-1)) was observed. At a constant growth rate (0.1 h(-1)), the mean molecular mass of the alginate was strongly influenced by changes in the OTR, varying from 860 to 1,690 kDa. These results support a possible relationship between alginate polymerization-depolymerization process and the O(2) uptake rate.
journal_name
Biotechnol Lettjournal_title
Biotechnology lettersauthors
Díaz-Barrera A,Silva P,Avalos R,Acevedo Fdoi
10.1007/s10529-009-9949-9subject
Has Abstractpub_date
2009-06-01 00:00:00pages
825-9issue
6eissn
0141-5492issn
1573-6776journal_volume
31pub_type
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