National Repository of Grey Literature 6 records found  Search took 0.01 seconds. 
Bariková vína
Pavelicová, Kristýna
The thesis entitled Barrique wine deals in the teoretical part with technology of production of red wine from grape harvesting after wine training. This is followed by the ri-pening of wine in barrique special barrels whose chemical wood composition is described the same as its influence on the wine quality. Furthermore the thesis describes the chemical composition of wine and biologically active substances in barrique wines. The last chapter of the theoretical part deals with methods in the analysis of polyphenolic compounds. In the practical part the work focuses on the identification of polyphenolic compounds in barrique wines. This happens in seven samples of wines and on the monitoring of changes in the content of substances during extraction of oak chips in ethanol. For detection High performance liquid chromatography in tandem with a mass spectrometry was used.
The possibility of using of Aronia fruit pomace
Kujínková, Jana ; Vítová, Eva (referee) ; Vespalcová, Milena (advisor)
This diploma thesis deals with possibilities of using of aronia fruit pomace. The theoretical part is focused on botanical characteristics of aronia fruit, description of HPLC and anthocyanins dyes. The effects of various extraction condition on content of some polyphenolic compounds (gallic and vanilla acids, katechin and rutin) in aronia berry pomace are investigated in the experimental part. The mentioned compounds were detected with HPLC. Thanks to this method the content of carbohydrates was also detected. A quantity of anthocyanins dyes was determined by pH differential method.
Víno jako účinná prevence a lék vůči srdečním chorobám
Brzobohatá, Anna
Positive effects of abstemious wine consummation are currently an increasingly discussed topic. They are especially indisputable in the area of cardiovascular health. There exist great many of unqualified and ill-founded articles regarding this subject matter. The Bachelor thesis elaborates on several dozens of academic papers dealing with effects of wine consummation on medication and prevention of heart and, related to some extent, vascular diseases. It elucidates differencies between white and red wine activity, includes recommendations about prosperous, periodically consumed wine capacity that differs with women and men, and introduces briefly the most significant heart diseases and substances contained in wine that give it his beneficial virtues.
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.
Studium antioxidačních látek u hroznových semen
Tomášková, Lenka
It is known, that grape seeds are rich in significant antioxidant. The issue of dealing with the analysis and comparison of antioxidant components in the seeds of Vitis vinifera in the individual varieties has not been sufficiently studied, yet. In the first part of the thesis is an extensive literature focused on a summary of the work, which study substances in the vine seeds and their effect on human health. Experimental work is focused on the study of antioxidant components in the seeds of Vitis vinifera. The experiment was used extracts of the three "normal" (Frankova, Ryzlink vlašský and Cabernet Moravia) and three interspecific varieties (Nativa, Marlen and Kofranka). Spectrometric, using three fundamentally different methods - DPPH, ABTS and FRAP was determined antioxidant activity . Spectrophotometry was further investigated the content of total polyphenolic compounds and total content of flavanols . Technique of high- performance liquid chromatography with mass spectroscopy were analyzed nine major flavonoids (apigenin, astragalin, hyperoside, isorhamnetin, kaempferol, myricetin, quercetin, quercitrin and rutin) and two procyanidins (procyanidin A2 and procyanidin B1). The highest values of antioxidant reached interspecific varieties Marlen and Nativa, at the least antioxidant components were recorded in the variety Cabernet Moravia. However, in complex evaluation, between studied of varieties were not significant differences.

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