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master's thesis
Utjecaj visokonaponskog električnog pražnjenja na sastav polifenolnih i hlapivih spojeva vina tijekom starenja
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. urn:nbn:hr:159:381327
Jurković, Marija
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Food Engineering
Laboratory for Technology and Analysis of Wine

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

Cite this document

Jurković, M. (2019). Utjecaj visokonaponskog električnog pražnjenja na sastav polifenolnih i hlapivih spojeva vina tijekom starenja (Master's thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:381327

Jurković, Marija. "Utjecaj visokonaponskog električnog pražnjenja na sastav polifenolnih i hlapivih spojeva vina tijekom starenja." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. https://urn.nsk.hr/urn:nbn:hr:159:381327

Jurković, Marija. "Utjecaj visokonaponskog električnog pražnjenja na sastav polifenolnih i hlapivih spojeva vina tijekom starenja." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. https://urn.nsk.hr/urn:nbn:hr:159:381327

Jurković, M. (2019). 'Utjecaj visokonaponskog električnog pražnjenja na sastav polifenolnih i hlapivih spojeva vina tijekom starenja', Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 12 September 2024, https://urn.nsk.hr/urn:nbn:hr:159:381327

Jurković M. Utjecaj visokonaponskog električnog pražnjenja na sastav polifenolnih i hlapivih spojeva vina tijekom starenja [Master's thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2019 [cited 2024 September 12] Available at: https://urn.nsk.hr/urn:nbn:hr:159:381327

M. Jurković, "Utjecaj visokonaponskog električnog pražnjenja na sastav polifenolnih i hlapivih spojeva vina tijekom starenja", Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:159:381327

Metadata
TitleUtjecaj visokonaponskog električnog pražnjenja na sastav polifenolnih i hlapivih spojeva vina tijekom starenja
Title (english)Influence of high voltage electrical discharge on the composition of polyphenolic and volatile compounds of wine during ageing
AuthorMarija Jurković
MentorNatka Ćurko (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Food Engineering)
(Laboratory for Technology and Analysis of Wine)
Zagreb
Defense date and country2019-09-30, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Food Technology
Abstract
Cilj ovog rada je bio utvrditi utjecaj visokonaponskog električnog pražnjenja i dodatka antioksidansa (standardna koncentracija SO2, snižena koncentracija SO2 uz dodatak glutationa i snižena koncentracija SO2) na sastav polifenolnih i hlapivih spojeva nakon 12 mjeseci starenja bijelog vina Graševina i crnog vina Cabernet Sauvignon. Za tretman vina hladnom plazmom korištena je tekućinska hladna plazma generirana pulsnim visokonaponskim generatorom uz upuhivanje mjehurića plina argona pri pozitivnom polaritetu. Koncentracija ukupnih fenola, tanina i antocijana određena je primjenom spektrofotometrijskih metoda. Sastav slobodnih antocijana, fenolnih kiselina i flavanola određen je primjenom tekućinske kromatografije visoke djelotvornosti (HPLC). Sastav hlapivih spojeva vina određen je primjenom plinske kromatografije s masenom detekcijom (GC/MS) uz prethodnu mikroekstrakciju na čvrstoj fazi (SPME). Tretman visokonaponskim električnim pražnjenjem utjecao je na blago smanjenje koncentracije polifenolnih i hlapivih spojeva u bijelom vinu. S druge strane, navedeni tretman u crnom vinu utjecao je na značajno smanjenje polifenolnih spojeva te porast koncentracije hlapivih spojeva u vinima sa sniženom koncentracijom SO2. Dodatak antioksidansa u vino utjecao je na stabilnost analiziranih polifenolnih spojeva.
Abstract (english)
The aim of this study was to determine the effect of high voltage electrical discharge and antioxidant addition (standard SO2 concentration, reduced SO2 concentration with glutathione addition and reduced SO2 concentration) on the composition of polyphenolic and volatile compounds of Graševina and Cabernet Sauvignon wine after 12 months of ageing. Liquid cold plasma generated by a pulse high-voltage generator was used for the treatment of cold plasma wine with blowing argon gas bubbles at positive polarity. The concentration of total phenols, tannins and anthocyanins was determined using spectrophotometric methods. The composition of free anthocyanins, phenolic acids and flavonols were determined using high performance liquid chromatography (HPLC). The composition of the volatile compounds of the wine was determined using gas chromatography with mass detection (GC/MS) with previous solid phase microextraction (SPME). Treatment with high voltage electrical discharge resulted in a slight decrease in the concentration of polyphenolic and volatile compounds in white wine. On the other hand, the mentioned treatment in red wine resulted in a significant decrease in polyphenolic compounds and an increase in the concentration of volatile compounds in wines with reduced SO2 concentration. The addition of antioxidants to wine contributed to the stability of the analyzed polyphenolic compounds.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:381327
Study programmeTitle: Food Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka prehrambenog inženjerstva (magistar/magistra inženjer/inženjerka prehrambenog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) icon
Created on2019-12-13 11:37:06