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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Vliv síření na vznik sloučenin vázajících SO2 ve víně
 Holka, Andrej
The thesis focuse on the effect of dose levels of sulfur dioxide in the must on the formation of carbonyl compounds. Futhermore it is concerned with oenological properties of sulfur dioxide, its forms and effects on wine. The thesis corroborates in detail carbonyl compounds bind sulfur dioxide and discusses their origin and various options to affect their quantity. Substances that may partially replace sulfur dioxide and thereby reduce its total quantity in wine are also debated. Experimental part of the thesis involved samples of wine differing in quantity of sulfur dioxide added to the must before fermentation and in forms of nutrition. Using the HPLC analysis concentrations of acetaldehyde, pyruvic acid, and 2-oxoglutaric acid were determined. The experiment demonstrated the effect of initial doses of sulfur dioxide on the amount of generated acetaldehyde and pyruvic acid. The effect of addition of thiamine, which reduces formation of pyruvic acid, was also shown.
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Význam glycerolu ve víně
 Holka, Andrej
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