| Effect of starvation length upon microbial activity in a biomass recycle reactor. | |
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MedLine Citation:
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PMID: 12407465 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The kinetics of substrate degradation and bacterial growth was determined in a microbial community from a biomass recycle reactor that had been deprived of substrate feed for 0-32 days. Starvation caused changes in bacterial numbers, community composition, and physiological state. Substrate starvation for less than 1 day resulted in modest (less than threefold) changes in endogenous respiration rate, ATP content, and biomass level. During a starvation period of 32 days, there were substantial changes in microbial community composition, as assessed by denaturing gradient gel electrophoresis (DGGE) fingerprinting of PCR amplicons of a portion of the 16S rDNA or by phospholipid fatty acid (PLFA) analysis. When the starved communities were stimulated with organic nutrients, the growth kinetics was a function of the length of the starvation period. For starvation periods of 2-8 days prior to nutrient addition, there was a phase of suboptimal exponential growth (S-phase) in which the exponential growth rate was about 30% of the ultimate unrestricted growth rate. S-phase lasted for 2-8 h and then unrestricted growth occurred at rates of 0.3-0.4 h(-1). At starvation times of 12 and 20 days, a lag phase preceded S-phase and the unrestricted growth phase. |
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Authors:
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A Konopka; T Zakharova; C Nakatsu |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of industrial microbiology & biotechnology Volume: 29 ISSN: 1367-5435 ISO Abbreviation: J. Ind. Microbiol. Biotechnol. Publication Date: 2002 Nov |
Date Detail:
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Created Date: 2002-10-30 Completed Date: 2003-01-30 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9705544 Medline TA: J Ind Microbiol Biotechnol Country: England |
Other Details:
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Languages: eng Pagination: 286-91 Citation Subset: IM |
Affiliation:
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Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Bacteria
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growth & development* Biodegradation, Environmental Biomass* Bioreactors Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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