Document Detail


Morphology and viability analysis of Streptomyces clavuligerus in industrial cultivation systems.
MedLine Citation:
PMID:  15015073     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of varying inoculum age and production scale upon the morphology and viability of Streptomyces clavuligerus were studied by analyzing visible and fluorescent light images acquired throughout pilot-plant and pre-industrial scale fermentations. Changes in production scale reveal that in 5 m(3) fermentors, the maximum hyphal area obtained is double the value obtained in 0.5 m(3) fermentors. It is probably due to the higher shear stresses acting upon hyphae in the 0.5 m(3) fermentor caused by higher tip speeds observed in these. The morphological quantification based on elongation and branching rates allowed fermentations to be pattern classified into distinct physiological time zones namely elongation, branching, fragmentation, etc. The general pattern observed for fermentations inoculated with late exponential phase inocula was similar to the pattern of fermentations run with stationary phase inocula except that both the elongation and branching periods started earlier in the former case. Using the available staining technique and image acquisition system, the viability seemed to be generally high and constant throughout the time course of all the studied fermentations.
Authors:
L S Pinto; L M Vieira; M N Pons; M M R Fonseca; J C Menezes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-03-11
Journal Detail:
Title:  Bioprocess and biosystems engineering     Volume:  26     ISSN:  1615-7591     ISO Abbreviation:  Bioprocess Biosyst Eng     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-04-02     Completed Date:  2005-04-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  101088505     Medline TA:  Bioprocess Biosyst Eng     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  177-84     Citation Subset:  IM    
Affiliation:
Centre for Biological and Chemical Engineering, IST, Technical University of Lisbon, Av. Rovisco Pais, 1049-001, Portugal [corrected]
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MeSH Terms
Descriptor/Qualifier:
Bioreactors / microbiology*
Fermentation
Industrial Microbiology*
Streptomyces / cytology*,  growth & development*
Comments/Corrections
Erratum In:
Bioprocess Biosyst Eng. 2004 Jul;26(4):285

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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