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; (Sustainable Technologies and Renewable Energy Sources); 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