|
|
Studie obsahu antioxidačních komponent u dealkoholizovaných vín
Hrnčirík, Miroslav
Our work was focused on the study of antioxidant ingredients contained in dealcoholised selected wines. For the experiment, three were selected samples of white, pink, three and three red wines, each of the values alcohol 0,1 %, 5 % and 12 % alcohol. Using a high-performance liquid chromatography were identified important antioxidants, specifically gallic acid, vanillic acid, syringic acid, caftaric acid, caffeic acid, p-coumaric acid, fertaric acid, ferulic acid, catechin, epicatechin, cis-resveratrol, rutin, quercitrin, tyrosol and quercetin. Spectrophotometry was also used for the determination of antioxidant activity, contents of total polyphenols, flavonoids and hydroxycinnamic acids. The results of this study can be said that the content of antioxidant components in dealcoholised wines and a "normal" order of the wines was similar values.
|
|
|
Sekundární produkty révy vinné a vína
Cenková, Lenka
This Diploma thesis first deals with composition of the bunch of grapes and must. The following is a description of the selected consumable secondary products such as must, dealcoholized vine, jam, marmalade, jelly from must, vine jelly, grape seed oil, flour from grape seeds. Further describes other secondary products such as pomace (marcs) and vineyeard prunings and their usage and mentioned is also a significant waste resulting from the grape vine cultivation and vine production and its possible utilisation. In the practical part of the thesis there is performed the procedure of the production (conservation) of grape vine must and production of jelly from must from cultivars "Veltlínské zelené" and "Dornfelder". These 2 samples of jellies were then together with other 6 samples of similar products (5 of them vine products from other vineries, 1 product from different fruit - cherries) organoleptically evaluated and analytically measured in the laboratory. The results are processed into tables, charts, and statistically and verbally commented.
|
guest ::
