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Glucose, l-Malic Acid and pH Effect on Fermentation Products in Biological Deacidification

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  • A. Kunicka-Styczyńska

Abstract

Industrial wine yeasts Saccharomyces cerevisiae Syrena, an interspecies hybrid (S. cerevisiae × S. bayanus) HW2-3 and Schizosaccharomyces pombe met 3-15 h+>/sup> were examined to determine changes in fermentation profiles in different environmental conditions in YG medium with different concentrations of glucose (2, 6, 40 or 100 g/l), L-malic acid (4, 7 or 11 g/l) and at pH 3.0, 3.5 and 5.0. The results were obtained by HPLC method (organic acids, acetaldehyde, glycerol, diacetyl) and enzymatically (L-malic acid, ethanol). In anaerobic conditions (100 g/l glucose), the optimal parameters for L-malic acid decomposition for S. cerevisiae Syrena and the hybrid HW2-3 were 11 g/l L-malic acid and pH 3.0 and 3.5, respectively. S. pombe expressed the highest demalication activity at 40 and 100 g/l glucose, 7 g/l L-malic acid and pH 3.0. The fermentation profiles of selected metabolites of yeast were unique for specific industrial strains. These profiles may help in the proper selection of yeast strains to fermentation and make it possible to predict the organoleptic changes in the course of fruit must fermentation.

Suggested Citation

  • A. Kunicka-Styczyńska, 2009. "Glucose, l-Malic Acid and pH Effect on Fermentation Products in Biological Deacidification," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 27(SpecialIs), pages 319-322.
    • Handle: RePEc:caa:jnlcjf:v:27:y:2009:i:specialissue1:id:604-cjfs
    DOI: 10.17221/604-CJFS
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