Nutraceutičke i antinutraceutičke komponente u hrvatskim crnim vinima sa zaštićenom oznakom izvornosti

doctoral thesis

• Title (english): Nutraceutical and antinutraceutical components of Croatian red wines with protected designation of origin
• Author: Paula Žurga
• Mentor: Nada Vahčić (mentor)
• Mentor: Mladenka Malenica (komentor)
• Committee member: Karin Kovačević-Ganić (predsjednik povjerenstva)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Quality Control); (Laboratory for Food Quality Control); Zagreb
• Defense date and country: 2019-12-13, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology
• Universal decimal classification (UDC): 633/635 - Horticulture. Fruit growing. Viticulture. Gardening

Abstract

Antioksidacijski kapacitet te koncentracije nutraceutičkih (fenolni spojevi, makro-, mikro- i elementi u tragovima) i antinutraceutičkih (toksični elementi, biogeni amini, okratoksin A) komponenata određene su u 110 uzoraka hrvatskih crnih vina sa zaštićenom oznakom izvornosti. Istraživanje je obuhvatilo vina sedam sorti iz pet godišta berbe i sedam zaštićenih oznaka izvornosti. Antioksidacijski kapacitet vina te koncentracije pojedinačnih fenola u hrvatskim su vinima ovisne većim dijelom o geografskom podrijetlu vina, a manjim dijelom o karakteristikama proizvodne sorte, dok je elementni sastav vina najvećim dijelom ovisan o geografskom podrijetlu vina. Među biogenim aminima, histamin je jedini bio sortno i regionalno specifičan. Više koncentracije histamina izmjerene su u vinima s višim pH te u vinima proizvedenim od grožđa ubranog u klimatološki nepovoljnoj godini. Koncentracije okratoksina A i udio kontaminiranih vina postupno je rastao od sjevera prema jugu. Također je učestalost kontaminacije upućivala na sortno specifičnu osjetljivost. Analizom glavnih komponenata i kanoničkom diskriminacijskom analizom istražen je potencijal ispitivanih fenolnih spojeva i elemenata za diskriminaciju hrvatskih crnih vina s obzirom na sortu, geografsko podrijetlo i godište berbe. Učinkoviti fenolni spojevi u diskriminaciji vina bili su: katehin, kvercetin, miricetin, vanilinska i ferulinska kiselina i resveratrol. Učinkoviti elementi u diskriminaciji vina bili su K, Na, Al, Cr, Co i As.

Abstract (english)

Antioxidant capacity and concentrations of nutraceutical (phenols, macro-, micro- and trace elements) and antinutraceutical (toxic elements, biogenic amines and ochratoxin A) components were determined in 110 samples of Croatian red wines with protected designation of origin. Seven varieties, five vintages and seven protected designations of origin were included in the study. Antioxidant capacity and concentrations of individual phenols in Croatian wines depended mostly on the geographic origin and less on the variety, while elemental composition in greatest part depended on the geographic origin. Among biogenic amines, only histamine was varietally and regionally specific. Higher histamine concentrations were measured in wines with higher pH and in wines produced from the grapes harvested in the climatologically unfavorable year. Ochratoxin A concentration and frequency of contamination increased southwards. The frequency of ochratoxin A contamination pointed to variety-specific susceptibility. Principal component analysis and canonical discriminant analysis were used to investigate the potential of investigated phenols and elements to discriminate Croatian red wines according to variety, geographic origin and vintage. Catechin, quercetin, miricetin, vanillic and ferulic acid and resveratrol were efficient phenols while K, Na, Al, Cr, Co and As were efficient elements in wine discrimination.

• Keywords: antioksidacijski kapacitet; fenolni spojevi; elementi; kontaminanti; kanonička diskriminacijska analiza; crno vino
• Keywords (english): antioxidant capacity; phenolic compounds; elements; contaminants; canonical discriminant activity; red wine
• Language: croatian
• URN:NBN: urn:nbn:hr:159:488263
• Study programme: Title: Postgraduate PhD Study in Biotechnology and Bioprocess Engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti (doktor/doktorica znanosti)
• Type of resource: Text
• Extent: 159 str. : 30 cm
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-01-28 11:47:19