Polifenolni sastav komina grožđa

master's thesis

• Author: Sara Batur
• Mentor: Jasminka Karoglan-Kontić (mentor)
• Committee member: Jasminka Karoglan-Kontić (predsjednik povjerenstva)
• Committee member: Marija Bujan (član povjerenstva)
• Committee member: Darko Preiner (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Viticulture and Enology); Zagreb
• Defense date and country: 2016-09-12, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy; Viticulture and Enology

Abstract

Polifenolni spojevi predstavljaju jednu od najrasprostranjenijih grupa prirodnih spojeva.
Mogu se koristiti u različitim granama industrije, od prehrambene, farmaceutske sve do
kozmetičke. Vrlo važnu ulogu imaju u proizvodnji vina, a nakon završene vinifikacije ostaju i
u komini grožđa. Komina sadrži brojne polifenolne spojeve, te se stoga može smatrati
vrijednom sirovinom za njihovo komercijalno dobivanje. U ovom radu, korištena je komina
dobivena nakon vinifikacije slijedećih sorata: 'Babić', 'Cabernet Cortis', 'Chancellor', 'Leon
Millot', 'Marechal Foch', 'Merlot', 'Monarch' i 'Regent'. Analizom varijance određena je
signifikantnost razlike između sorata za sadržaj pojedinih polifenolnih spojeva u kožicama i
sjemenkama komine. Najveći maseni udio antocijana određen je u kožicama komine sorata
'Chancellor' i 'Regent'. 'Regent' se ističe i kao sorta s najvećim masenim udjelom flavonola
zajedno sa sortom 'Monarch'. U slučaju sorte 'Cabernet Cortis' određen je najveći maseni udio
flavan-3-ola i galne kiseline u sjemenkama komine, dok 'Marechal Foch' sadrži najviše
flavan-3-ola u kožicama komine.

Abstract (english)

Polyphenolic compounds represent one of the most widespread groups of natural compounds.
They can be used in many industries, such as food industry, pharmaceutical and cosmetic
industry. They play a very important role in wine production, and after vinification they are
left in the grape marc. Grape marc has many polyphenols, and can therefore be considered a
valuable source for their comercial production. In this study, the used grape marc was
obtained from vinification of the following cultivars: 'Babić', 'Cabernet Cortis', 'Chancellor',
'Leon Millot', 'Marechal Foch', 'Merlot', 'Monarch' and 'Regent'. Significant difference
between the polyphenol contents of various cultivars in grape skins and seeds was determined
by variance analysis. The highest amount of anthocyans was found in skins of the 'Chancellor'
and 'Regent' grape marcs. 'Regent', along with 'Monarch', is the cultivar with most flavonol
contents. 'Cabernet Cortis' cultivar was found to contain the most flavan-3-ols and gallic acids
in grape seeds, and 'Marechal Foch' had the most flavan-3-ols in grape skins.

• Keywords: polifenoli; komina grožđa; sorte; maseni udio
• Keywords (english): polyphenols; grape marc; cultivars; mass fraction
• Language: croatian
• URN:NBN: urn:nbn:hr:204:836619
• Study programme: Title: Horticulture; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka hortikulture (magistar/ magistra inženjer/inženjerka hortikulture)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2016-11-15 08:46:18