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LONG‐CHAIN FATTY ACID COMPOSITION AS A CRITERION FOR YEAST DISTINCTION IN THE BREWING INDUSTRY
Author(s) -
Silva Maria Moreira da,
MalfeitoFerreira Manuel,
Loureiro Virgílio,
Aubyn António St.
Publication year - 1994
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1994.tb00805.x
Subject(s) - brewing , yeast , saccharomyces , saccharomyces cerevisiae , food science , fatty acid , biology , fermentation , biochemistry , chemistry
The diversity of yeasts isolated from brewing plants and its role on beer quality makes yeast distinction a major concern in industrial microbiological control. Several approaches have been tried to develop rapid and simple methods to perform such tasks. Among these, stands the utilization of long‐chain fatty acid composition of total yeast biomass. In this paper results are reported showing the potential of this technique to characterize yeast flora isolated from industrial plants. Fatty acid profiles of brewing species are clearly differentiated from those of non‐Saccharomyces strains using statistical data treatment by principal component analysis (PCA). Distinction between brewing and wild strains of Saccharomyces spp. was not apparent. In comparison, fatty acid profiling showed higher discriminating ability than growth on lysine medium for non‐ Saccharomyces strains. For distinction of S. cerevisiae var. diastaticus from other Saccharomyces strains, growth on starch medium showed to be necessary.