| Pseudomonas oleovorans as a Source of Poly(beta-Hydroxyalkanoates) for Potential Applications as Biodegradable Polyesters. | |
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MedLine Citation:
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PMID: 16347708 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Pseudomonas oleovorans was grown in homogeneous media containing n-alkanoic acids, from formate to decanoate, as the sole carbon sources. Formation of intracellular poly(beta-hydroxyalkanoates) was observed only for hexanoate and the higher n-alkanoic acids. The maximum isolated polymer yields were approximately 30% of the cellular dry weight with growth on either octanoate or nonanoate. In most cases, the major repeating unit in the polymer had the same chain length as the n-alkanoic acid used for growth, but units with two carbon atoms less or more than the acid used as a carbon source were also generally present in the polyesters formed. Indeed, copolymers containing as many as six different types of beta-hydroxyalkanoate units were formed. The weight average molecular weights of the poly(beta-hydroxyalkanoate) copolymers produced by P. oleovorans ranged from 90,000 to 370,000. In spite of the higher cell yields obtained with octanoate and nonanoate, the use of hexanoate and heptanoate yielded higher-molecular-weight polymers. These copolyesters represent an entirely new class of biodegradable thermoplastics. |
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Authors:
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H Brandl; R A Gross; R W Lenz; R C Fuller |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Applied and environmental microbiology Volume: 54 ISSN: 0099-2240 ISO Abbreviation: Appl. Environ. Microbiol. Publication Date: 1988 Aug |
Date Detail:
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Created Date: 2010-06-25 Completed Date: 2010-06-25 Revised Date: 2010-09-20 |
Medline Journal Info:
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Nlm Unique ID: 7605801 Medline TA: Appl Environ Microbiol Country: United States |
Other Details:
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Languages: eng Pagination: 1977-82 Citation Subset: - |
Affiliation:
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Departments of Biochemistry and Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003. |
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