| Improvements in ethanol tolerance of Kluyveromyces fragilis in jerusalem artichoke juice. | |
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MedLine Citation:
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PMID: 18584667 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Alcoholic fermentation of Jerusalem artichoke juice, a natural complex medium, allowed the production of 13% (v/v) ethanol utilizing an inulin-fermenting strain of Kluyveromyces fragilis, strongly sensitive to ethanol. However, the fermentation of a simple medium with a similar concentration of fermentable sugars (235 g/L) as saccharose stopped prematurely when only 7% (v/v) ethanol had been produced. Differences in the two fermentation profiles were attributed to the significantly lower ethanol tolerance of K. fragilis IGC 2671 in the simple medium with 2% saccharose as compared with diluted J.a. juice with a similar sugar concentration, in fact, (1) in diluted J. a. juice, growth was possible up to 8% (v/v) added ethanol compared with 6% (v/v) in simple medium and (2) ethanol-induced inhibition of the specific growth and fermentation rate as well as ethanol-induced stimulation of the specific death rate were much more drastic in simple medium. Present results show that (1) the complex composition of the medium used for alcoholic fermentation plays a marked role in the ability of the yeast to tolerate and produce ethanol; (2) J. a. juice proved a very appropriate medium for a productive alcoholic fermentation, namely, in processes based on strains with a low ethanol resistance; and (3) to characterize and compare the ethanol tolerance of fermenting yeasts, the standardization of the medium composition must be taken in consideration. |
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Authors:
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M F Rosa; I S Correia; J M Novais |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biotechnology and bioengineering Volume: 31 ISSN: 0006-3592 ISO Abbreviation: Biotechnol. Bioeng. Publication Date: 1988 May |
Date Detail:
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Created Date: 2008-06-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7502021 Medline TA: Biotechnol Bioeng Country: United States |
Other Details:
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Languages: eng Pagination: 705-10 Citation Subset: - |
Affiliation:
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Departamento de Energias Renováveis, Laboratório Nacional de Engenharia e Tecnologia Industrial, 1699 Lisboa, Codex, Portugal. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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