The effects influence of a coliform bacterium on fermentation by yeast
The effects influence of a coliform bacterium on fermentation by yeast
Hopped wort (20°C) was inoculated with brewing yeast alone (107 cells/ml), or with Citrobacter freundii (105 cells/ml) or with both organisms at the concentrations stated. The mixture grew somewhat more quickly than the pure yeast culture, the oxidation-reduction potential and S.G. fell more quickly but the pH less rapidly. The mixed culture produced more ethanol and various organic acids but less volatile carbon. Dimethyl sulphide was produced in the mixed culture but not in the pure yeast culture. It is concluded that C. freundiican have a profound influence on yeast fermentation, consistent with its pure culture characteristics.
99-102
Keevil, W.J.
cb7de0a7-ce33-4cfa-af52-07f99e5650eb
Hough, J.S.
35d80037-e907-4470-82ba-292746a5468c
Cole, J.A.
69cde75d-d175-4d83-9f56-6ffa9e49b1f0
March 1979
Keevil, W.J.
cb7de0a7-ce33-4cfa-af52-07f99e5650eb
Hough, J.S.
35d80037-e907-4470-82ba-292746a5468c
Cole, J.A.
69cde75d-d175-4d83-9f56-6ffa9e49b1f0
Keevil, W.J., Hough, J.S. and Cole, J.A.
(1979)
The effects influence of a coliform bacterium on fermentation by yeast.
Journal of the Institute of Brewing, 85, .
(doi:10.1002/j.2050-0416.1979.tb06835.x).
Abstract
Hopped wort (20°C) was inoculated with brewing yeast alone (107 cells/ml), or with Citrobacter freundii (105 cells/ml) or with both organisms at the concentrations stated. The mixture grew somewhat more quickly than the pure yeast culture, the oxidation-reduction potential and S.G. fell more quickly but the pH less rapidly. The mixed culture produced more ethanol and various organic acids but less volatile carbon. Dimethyl sulphide was produced in the mixed culture but not in the pure yeast culture. It is concluded that C. freundiican have a profound influence on yeast fermentation, consistent with its pure culture characteristics.
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Published date: March 1979
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Local EPrints ID: 477181
URI: http://eprints.soton.ac.uk/id/eprint/477181
ISSN: 2050-0416
PURE UUID: 24b0db66-fd37-4de8-af7e-8a2e5046735e
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Date deposited: 31 May 2023 17:04
Last modified: 17 Mar 2024 02:54
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Author:
J.S. Hough
Author:
J.A. Cole
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