Utjecaj godine uzgoja na sastav polifenola djevičanskog maslinovog ulja iz Istre

undergraduate thesis

• Title (english): Influence of year of cultivation on polyphenols of Istrian virgin olive oil
• Author: Tina Vidulin
• Mentor: Klara Kraljić (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Engineering); (Laboratory for Oil and Fat Technology); Zagreb
• Defense date and country: 2016-07-12, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

Fenolni spojevi su učinkoviti prirodni antioksidansi koji štite djevičansko maslinovo ulje od autooksidacijskih promjena te mu tako osiguravaju trajnost i kvalitetu. Osim njihovog važnog antioksidacijskog djelovanja treba napomenuti da su odgovorni i za specifična senzorska svojstva djevičanskog maslinovog ulja. Cilj ovog rada bio je utvrditi utjecaj godine uzgoja na sastav polifenola djevičanskog maslinovog ulja iz Istre. Sastav i udio polifenola u uzorcima ekstra djevičanskih maslinovih ulja iz 2014. godine i 2015. godine utvrđeni su metodom tekućinske kromatografije visoke djelotvornosti uz UV detekciju. Udjeli polifenolnih spojeva ovih dvaju uzoraka sličnih su vrijednosti uz aglikone oleuropeina kao dominantne fenolne spojeve. Osim aglikona oleuropeina, u analiziranim uzorcima identificirana je skupina sekoiridoida te fenolni alkoholi, hidroksitirosol i tirosol. Takav rezultat posljedica je sličnih vremenskih uvjeta (količine oborina) u navedene dvije vegetacijske godine.

Abstract (english)

Phenolic compounds are effective natural antioxidants that protect virgin olive oil from autoxidation while ensuring its stability and quality. In addition to their antioxidant activity, they are also responsible for the specific organoleptic characteristics of virgin olive oil. The aim of this study was to determine the influence of cultivation year on the content and composition of polyphenols of Istrian virgin olive oils. Polyphenols of extra virgin olive oils from 2014. and 2015. were determined by using high performance liquid chromatography with UV detection. Content and composition of polyphenolic compounds of these two samples are similar with oleuropein aglycone as dominant phenolic compounds. In addition, group of secoiridoides and phenolic alcohol, hydroxytyrosol and tyrosol, were also identified in both analyzed oils. This results are consequence of similar weather conditions (precipitation) of these two vegetation years.

• Keywords: djevičansko maslinovo ulje; polifenoli; godina uzgoja
• Keywords (english): virgin olive oil; polyphenols; cultivation year
• Language: croatian
• URN:NBN: urn:nbn:hr:159:337383
• Study programme: Title: Biotechnology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-04-24 10:05:39