| Nitrogen addition influences formation of aroma compounds, volatile acidity and ethanol in nitrogen deficient media fermented by Saccharomyces cerevisiae wine strains. | |
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MedLine Citation:
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PMID: 19619854 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effects of nitrogen addition into nitrogen deficient/depleted media on the release of aroma compounds post-fermentation were investigated in three commercial yeast strains of Saccharomyces cerevisiae which highlight the yeast strain effect as well as nitrogen effects. By comparing the two timings of nitrogen addition, prior to fermentation or later at stationary phase (72 h), it was shown that nitrogen addition at stationary phase significantly decreases ethanol and acetic acid formation and significantly increases the following compounds: 2-phenylethanol, ethyl isobutyrate, 2-phenylethyl acetate, ethyl 2-methylbutyrate and ethyl propionate in the three strains, and also isovaleric acid, isoamyl alcohol and ethyl isovalerate in both PYCC4072 and UCD522. The strain EC1118 produced significantly less medium chain fatty acids, hexanoic, octanoic and decanoic acids and their respective esters after nitrogen addition. Therefore, timing of nitrogen addition to a ferment media can vary the concentration of certain aroma compound and might provide a means for varying wine composition. |
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Authors:
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Catarina Barbosa; Virgilio Falco; Arlete Mendes-Faia; Ana Mendes-Ferreira |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of bioscience and bioengineering Volume: 108 ISSN: 1347-4421 ISO Abbreviation: J. Biosci. Bioeng. Publication Date: 2009 Aug |
Date Detail:
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Created Date: 2009-07-21 Completed Date: 2009-09-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888800 Medline TA: J Biosci Bioeng Country: Japan |
Other Details:
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Languages: eng Pagination: 99-104 Citation Subset: IM |
Affiliation:
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Institute for Biotechnology and Bioengineering, Centre of Genetics and Biotechnology, (IBB/CGB-UTAD), Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Ethanol
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metabolism* Fatty Acids, Volatile / biosynthesis* Nitrogen / pharmacology* Saccharomyces cerevisiae / growth & development* Species Specificity Wine / microbiology* |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids, Volatile; 64-17-5/Ethanol; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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