Utjecaj načina ekstrakcije na prinos bioaktivnih spojeva iz praha aronije (Aronia melanocarpa L.)

master's thesis

• Title (english): Impacts of extraction on the press of bioactive compounds from the aronium powder (Aronia melanocarpa L.)
• Author: Daniela Patricia Bilić
• Mentor: Sandra Voća (mentor)
• Committee member: Sandra Voća (predsjednik povjerenstva)
• Committee member: Nadica Dobričević (član povjerenstva)
• Committee member: Martina Skendrović Babojelić (član povjerenstva)
• Committee member: Jana Šic Žlabur (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Agricultural Technology, Storage and Transport); Zagreb
• Defense date and country: 2017-07-06, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy; Fruit Growing

Abstract

Aronija je svoju veliku popularnost stekla zbog izrazito bogatog nutritivnog sadrţaja. Pozitivan utjecaj na ljudsko zdravlje posljedica je snaţne antioksidacijske aktivnosti polifenolnih spojeva. Proizvodnja sokova i ostalih preraĎevina od aronije nalaze široku primjenu u prehrambenoj industriji. Prah aronije bogat je izvor bioaktivnih spojeva te kao dodatak različitim proizvodima povećava njihov antioksidacijski kapacitet. Cilj istraţivanja bio je utvrditi razlike izmeĎu načina ekstrakcije, klasična i ultrazvukom, praha aronije u destiliranoj vodi te mogućnosti upotrebe ultrazvuka visokog intenziteta u ekstrakciji praha aronije. UtvrĎeno je kako su vodeni ekstrakti praha aronije imali veće vrijednosti antioksidacijskog kapaciteta neovisno o načinu ekstrakcije. Uzorci s dodanim prahom aronije tretirani ultrazvukom visokog intenziteta imali su značajno veći sadrţaj svih analiziranih bioaktivnih komponenti. Primjena ultrazvuka visokog intenziteta značajno je smanjila vrijeme potrebno za ekstrakciju biljnog materijala. UtvrĎena je pozitivna povezanost izmeĎu sadrţaja vitamina C, ukupnih fenola i flavonoida te ukupnih antocijana i antioksidacijskog kapaciteta kod uzoraka tretiranih ultrazvukom visokog intenziteta.

Abstract (english)

Aronia gained it´s great popularity because of extremely rich nutritional content. The positive impact on human health is a result of the strong antioxidant activity of polyphenolic compounds. Production of juices and other products from chokeberry are widely used in the food industry. Chokeberry powder is a rich source of bioactive compounds and it´s addition to a variety of products increases their antioxidant capacity. Also, the aim of the research was to determine the differences between the extraction techiques, classical and ultrasound, of chokeberry powder in distilled water. To determine the possibility of using high intensity ultrasound in extraction of chokeberry powder. The water extracts of chokeberry powder had higher antioxidant capacity irrespective of the extraction technique. The samples with added chokeberry powder treated with high intensity ultrasound had significantly higher content of all analyzed bioactive compounds. The application of high intensity ultrasound significantly reduced extraction time of the plant material. The positive correlation between vitamin C content, total phenols and flavonoids content, anthocyanins content and antioxidant capacity was determined in samples with added chokeberry powder treated with high intensity ultrasound.

• Keywords: prah aronije; antioksidacijski kapacitet; ultrazvuk visokog intenziteta; klasična ekstrakcija; nutritivni sastav
• Keywords (english): chokeberry powder; antioxidant capacity; high intensity ultrasound; classic extraction; nutritional composition
• Language: croatian
• URN:NBN: urn:nbn:hr:204:385253
• Study programme: Title: Horticulture; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka hortikulture (magistar/ magistra inženjer/inženjerka hortikulture)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-09-18 12:22:30