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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Studium fenolických látek hroznů révy vinné =: Study of the Phenolic Compouns in Grape /
 Kumšta, Michal
At the center of the presented work is six publications devoted to phenolic substances in wine and grapes. In the literary review are written main groups of phenolic substances found in grapes and wines made from them. In the topic are hydroxybenzoic and hydroxyscinnamic acids, stilbenes, flavan-3-ols, flavonols and anthocyanins. There is also mentioned theirs synthesis in grape berries. Reactions occurring in musts with participation of oxidative enzymes are involved also. Also are described the reactions occurring in grape musts with participation of oxidative enzymes affecting mainly cafftaric acid and subsequent reactions involving glutathione, or ascorbic acid. Oxidation of finished wines with the participation of metals ions leads to formation of the acetaldehyde is described also. This proces produces other reaction products too. The practical part includes necessary chemicals, treatment and processing of samples, the instrumental equipment and the description of the methods used in determination of the individual analytes by liquid chromatography. Other methods have been used to spectrophotometric determination of phenolic compouds. The first three publications deal with phenolic substances in Rhine Riesling, which allow verification of the geographical origin of grapes. Next publication uses anthocyanins for the same purpose. Determination of anthocyane dye profile makes possible to exclude inappropriate genetic sources for grape breeding. Determination of specific phenolic substances goups reveals the kinetics of processes taking place during maceration of mash.
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Klinický přínos stanovení enzymů purinového metabolizmu a metabolitů 6-merkaptopurinu při terapii azathioprinem u nemocných s ulcerózní kolitidou a Crohnovou chorobou
Lukáš, Milan ; Kumšta, Michal ; Všeobecná fakultní nemocnice (Praha, Česko)
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See also: similar author names
2 Kumšta, Martin
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