Biološki aktivni spojevi višnje i višnje Maraske tijekom zrenja i skladištenja pri -18° C

doctoral thesis

• Title (english): Biologically active compounds in sour cherry and Marasca sour cherry during ripening and storage at -18° C
• Author: Sandra Pedisić; MBZ: 297482
• Mentor: Branka Levaj (mentor); MBZ: 80813
• Committee member: Verica Dragović-Uzelac (predsjednik povjerenstva); MBZ: 210975
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; Zagreb
• Defense date and country: 2007-07-18, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology
• Universal decimal classification (UDC): 664 - Production and preservation of solid foodstuffs

Abstract

Istraživane su promjene antocijana, fenolnih kiselina, flavonol glikozida, i flavan-3-ola u različitim ekotipovima višnje maraske s područja Zadra i Splita, te u višnjama sorte Keleris s područja Zadra i Cigančica s područja Osijeka. U navedenim sortama određivane su promijene boje te antioksidativni kapacitet. Nadalje, u ekotipovima višnje maraske i višnje Keleris ubranim u IV. terminu berbe, te u višnje Cigančica ubrane u III. terminu berbe istraživan je utjecaj zamrzavanja te skladištenja pri - 18°C tijekom 6 mjeseci na stabilnost polifenola. U istraživanim ekotipovima višnje maraske određene su značajno veće količine antocijana nego u sortama višanja Keleris i Cigančica. Tijekom zrenja količine antocijana se povećavaju, a najzastupljeniji antocijan bio je cijanidin-3-glukozilrutinozid. Ostali fenolni spojevi određeni su u manjim količinama u odnosu na antocijane, ali u višnji maraski određeni su u većim količinama nego u sortama Cigančica i Keleris. U ukupnoj količini identificiranih fenolnih spojeva flavonoli su najviše zastupljeni. Prema količini fenolnih spojeva nije moguće razlikovati iste ekotipove višnje maraske s različitih uzgojnih područja. Zamrzavanje i skladištenje pri -18oC/ 6 mjeseci utjecalo je na smanjenje gotovo svih fenolnih spojeva. Stupanj zrelosti, područje uzgoja i sorta signifikantno utječu na antioksidativni kapacitet, dok na parametre boje najviše utječe stupanj zrelosti.

Abstract (english)

Changes of anthocyanins, phenolic acids, flavonol glycosides and flavan-3-ols in different ecotypes of sour cherry marasca from Zadar and Split growing area and, in sour cherries Keleris and Cigančica from Zadar and Osijek growing area were investigated. Color change and antioxidant capacity were also determined in investigated sour cherries. In addition, the influence of freezing and storage on polyphenolics stability were investigated in ecotypes of sour cherry marasca and sour cherry Keleris in harvesting stage IV and, in sour cherry Cigančica in harvesting stage III. The content of anthocyanins was significantly higher in all investigated ecotypes of sour cherry marasca than in varieties of sour cherries Keleris and Cigančica while, the main anthocyanin was cyanidin-3-glucosilrutinoside. During ripening, the increase in the anthocyanins content was observed. In relation to anthocyanins, other phenolic compounds, among which dominated flavonol glycosides, were identified in lower quantities but were still higher in sour cherries marasca. The same ecotypes of sour cherry marasca from different growing areas were not distinguished according to phenolic content. Almost all phenolic compounds decreased upon freezing and/or storage at -18°C/6 months. The ripening stage, growing area and a variety significantly influenced the antioxidant capacity while, the color parameters were significantly influenced by the ripening stage.

• Keywords: antioksidativni kapacitett; antocijani; fenoli; HPLC; višnja maraska; zamrzavanje; zrenje
• Keywords (english): antioxidant capacity; anthocyanins; freezing; HPLC; phenolics; ripening; sour cherry marasca
• Language: croatian
• URN:NBN: urn:nbn:hr:159:610561
• Promotion: 2008-09-28
• Study programme: Title: Postgraduate PhD Study in Nutrition; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje biotehničkih znanosti, polje nutricionizam (doktor/doktorica znanosti, područje biotehničkih znanosti, polje nutricionizam)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2018-05-14 07:36:48