Effects of immobilization in Ba-alginate on nitrile-dependent oxygen uptake rates of Candida guilliermondi
Braz. j. microbiol
; 32(3): 221-224, July-Sept., 2001.
Article
in English
| LILACS
| ID: lil-316973
Responsible library:
BR32.1
ABSTRACT
Yeast cells immobilized by entrapment in Ba-alginate gel were investigated for growth pattern and respiratory activity. The oxygen uptake rates (OUR) of cells entrapped in gels with 4 per cent alginate were 5.2 and 23 per cent lower than the OUR of 2 per cent alginate and free cells, respectively. The mass-transfer resistance offered by the matrix and growth of the entrapped cells determine a gradient of nutrients throughout the gel which is responsible for both a lower specific growth rate of immobilized cells with respect to that of free ones, and a heterogeneous biomass distribution, with progressively increasing cellular density from the inside to the outside of the matrix. Gel-matrix polymer concentration affected the maximum oxygen uptake of immobilized growing yeast cells.
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Oxygen
/
Respiration
/
In Vitro Techniques
/
Candida
/
Polymerase Chain Reaction
/
Nitriles
Language:
English
Journal:
Braz. j. microbiol
Journal subject:
Microbiology
Year:
2001
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal de Minas Gerais/BR