Određivanje ukupnih polifenola i antocijana u uzorcima višnje maraske s različitih lokaliteta

master's thesis

• Title (english): Determination of total polyphenols content and antohocyans in samples of sour cherry marasca from different locations
• Author: Maja Defar
• Mentor: Damir Iveković (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Chemistry and Biochemistry); (Laboratory for General and Inorganic Chemistry and Electroanalysis); Zagreb
• Defense date and country: 2009-09, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology

Abstract

Višnja maraska važna je voćarska kultura u Republici Hrvatskoj. U ovom je radu određen sadržaj ukupnih polifenola i antocijana u uzorcima višnje maraske prikupljenih sa 31 lokacije sjevernodalmatinskog i srednjedalmatinskog područja. Sadržaj ukupnih polifenola određen je protočno-injekcijskom (FIA) metodom temeljenoj na reakciji polifenola s Folin-Ciocalteau reagensom. Primijenjena FIA metoda pokazala se brzom, robusnom, pouzdanom i fleksibilnom metodom koja omogućuje određivanje polifenola u više od 20 uzoraka po satu. Sadržaj ukupnih polifenola uzoraka obuhvaćenih ovim radom, izražen kao ekvivalent galne kiseline, varirao je između 177 i 452 mg/L, pri čemu se ta vrijednost za većinu uzoraka kretala između 320 i 420 mg/L. Uočeno je da postoji statistički signifikantna korelacija između sadržaja ukupnih polifenola i sadržaja antocijana u uzorcima. Nije primijećena signifikantna korelacija između sadržaja ukupnih polifenola uzoraka i njihovog geografskog podrijetla.

Abstract (english)

Sour cherry marasca is an important cultivar of Croatia. In this study, a total polyphenols content and content of anthocyanins in marasca sour cherry samples from thirty-one locations in North and Middle Dalmatia were evaluated. Total polyphenols content of samples was evaluated by flow injection analysis (FIA) method based on the reaction of polyphenols with Folin-Ciocalteau reagent. It was demonstrated that FIA method employed in this work is fast, robust, accurate, and flexible method that permits evaluation of more than 20 samples per hour. Total polyphenols content of samples evaluated in this study, expressed as equivalent of gallic acid, was found to range from 177 to 452 mg/L, with majority of samples exhibiting polyphenol content in the range between 320 and 420 mg/L. It was found that statistically significant correlation exists between total polyphenols content and the content of anthocyans in the samples. No correlation between total polyphenols content of the samples and their geographical origin was found.

• Keywords: ukupni polifenoli; antocijani; višnja maraska; protočno-injekcijska analiza
• Keywords (english): Total polyphenols content; anthocyans; tart cherry; flow injection analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:159:069559
• Study programme: Title: Food Technology; specializations in: Nutrition; Course: Nutrition; Study programme type: university; Study level: graduate; Academic / professional title: diplomirani inženjer prehrambene tehnologije; smjer nutricionizam (diplomirani inženjer prehrambene tehnologije; smjer nutricionizam)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-09-01 10:08:17