The inhibition of Saccharomyces cerevisiae population during alcoholic fermentation of grape must by octanoic, decanoic and dodecanoic acid mixture

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43510%2F17%3A43912136" target="_blank" >RIV/62156489:43510/17:43912136 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1051/bioconf/20170902025" target="_blank" >https://doi.org/10.1051/bioconf/20170902025</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/bioconf/20170902025" target="_blank" >10.1051/bioconf/20170902025</a>

Result language
angličtina
Original language name
The inhibition of Saccharomyces cerevisiae population during alcoholic fermentation of grape must by octanoic, decanoic and dodecanoic acid mixture
Original language description
The inhibition of alcoholic fermentation by octanoic, decanoic and dodecanoic acid mixture was investigated. Middle chain fatty acids (MCFA) mixture contained 10 grams of C8:C10:C12 in a ratio of 2:7:1 was dissolved in 100 ml of 70% ethanol, and in such form, it was subsequently applied into the fermenting must samples. A flow cytometry test showed that the 10 mg/L dose of MCFA mixture had a toxic effect on Saccharomyces cerevisiae (45.9% of viable cells) compared with the control variant (74.35%). In combination with 60 mg/L of SO2, it had a higher efficiency (3.1% of viable cells) than using a dose of SO2 alone (13.9%). Direct counting of yeast cells confirmed a higher concentration of dead cells with a higher concentration of MCFA. A dose of 10 mg/L of MCFA mixture caused the highest percentage of dead yeast after 24 hours (about 60%) compared to the control variant without MCFA dosage (about 24%). The results of residues showed that there is no significant quantitative difference between the treated and untreated musts because of fixing of MCFA inside the yeast cells. This method can effectively reduce the cost of production technology for wines with residual sugar and, in general, reduce the dosage of SO2.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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