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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 5, No. 3, 2002, pp. 272-278
Bioline Code: ej02041
Full paper language: English
Document type: Note
Document available free of charge

Electronic Journal of Biotechnology, Vol. 5, No. 3, 2002, pp. 272-278

 en The influence of centrifugation on Zymomonas mobilis check for this species in other resources aggregation
Palha, María de los Angeles Perez Fernandez; Lopes, Carlos Edison; de Andrade, Maria Alice Gomes & Pereira, Nei Junior


Flocculent Zymomonas mobilis check for this species in other resources breaks down in smaller flocs and individual cells when centrifuged. The main consequence of it is an increase in the dispersion of the sample, suggesting that the influence of the centrifugal force on the aggregation of cells is worth to study. The experiments showed that the degree of dispersion varied between 30% and 100% when the centrifugal acceleration changed from 25 g to 2500 g. Observation under the electronic microscope showed that a slimy material covered the cells recovered by gentle gravitational settling and, that the centrifuged cells presented a bare cell wall.

© 2002 by Universidad Católica de Valparaíso -- Chile
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