Document Detail


A kinetic model for energy spilling-associated product formation in substrate-sufficient continuous culture.
MedLine Citation:
PMID:  10792525     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
It has been demonstrated that excess substrate can cause uncoupling between anabolism and catabolism, which leads to energy spilling. However, the Luedeking-Piret equation for product formation does not account for the energy spilling-associated product formation due to substrate excess. Based on the growth yield and energy uncoupling models proposed earlier, a kinetic model describing energy spilling-associated product formation in relation to residual substrate concentration was developed for substrate-sufficient continuous culture and was further verified with literature data. The parameters in the proposed model are well defined and have their own physical meanings. From this model, the specific productivity of unit energy spilling-associated substrate consumption, and the maximum product yield coefficient, can be determined. Results show that the majority of energy spilling-associated substrate consumption was converted to carbon dioxide and less than 6% was fluxed into the metabolites, while it was found that the maximum product yield coefficients varied markedly under different nutrient limitations. The results from this research can be used to develop the optimized bioprocess for maximizing valuable product formation.
Authors:
Y Liu; J H Tay
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied microbiology     Volume:  88     ISSN:  1364-5072     ISO Abbreviation:  J. Appl. Microbiol.     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2000-07-27     Completed Date:  2000-07-27     Revised Date:  2000-12-18    
Medline Journal Info:
Nlm Unique ID:  9706280     Medline TA:  J Appl Microbiol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  663-8     Citation Subset:  IM    
Affiliation:
School of Civil and Structural Engineering, Nanyang Technological University, Singapore. cyliu@ntu.edu.sg
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MeSH Terms
Descriptor/Qualifier:
Energy Metabolism*
Kinetics
Models, Biological*

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


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