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Antiradical activity of polyphenols from old apple varieties


Krivak, Petra; Jakobek, Lidija
Antiradical activity of polyphenols from old apple varieties // 15th Ružička days "TODAY SCIENCE–TOMORROW INDUSTRY" / Šubarić, Drago ; Jukić, Ante (ur.).
Osijek: Josip Juraj Strossmayer University of Osijek Faculty of Food Technology Osijek Croatian Society of Chemical Engineers, 2015. str. 242-252 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Antiradical activity of polyphenols from old apple varieties

Autori
Krivak, Petra ; Jakobek, Lidija

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
15th Ružička days "TODAY SCIENCE–TOMORROW INDUSTRY" / Šubarić, Drago ; Jukić, Ante - Osijek : Josip Juraj Strossmayer University of Osijek Faculty of Food Technology Osijek Croatian Society of Chemical Engineers, 2015, 242-252

ISBN
978-953-6894-53-6

Skup
15th Ružička days "TODAY SCIENCE–TOMORROW INDUSTRY"

Mjesto i datum
Vukovar, Hrvatska, 11-12..09.2014.

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Old apple varieties; antiradical activity; DPPH˙; biphasic reaction

Sažetak
The aim of this work was to study the antiradical activity of polyphenols from old, ancient apple varieties grown in Croatia (Crvenka, Pisanika, Ledenara, Adamova zvijezda, Slavonska srčika and Wild apple). Polyphenols were extracted from apple peel and flesh by using ultrasonic bath. The scavenging of synthetic, free DPPH˙ radical by polyphenols was studied until the reaction reached the steady state. A biphasic reaction was observed between apple polyphenols and DPPH˙ radicals, with “fast” and “slow” scavenging rate. The antiradical activity of the peel of apples Pisanika, Ledenara, Crvenka, Adamova zvijezda was similar and higher than the antiradical activity of the peel of Wild apple and Slavonska srčika. On the other hand antiradical activity of the flesh of Wild apple was significantly higher than the antiradical activity of the flesh of other apples. A polyphenolic profile showed that the compounds most likely to be responsible for a strong antiradical activity of Wild apples are chlorogenic acids, phloretin derivatives, quercetin derivatives and flavanols. Polyphenols of old apple varieties can be considered as strong free radical scavengers, especially Wild apples. The overall results showed the need to preserve and protect these old varieties because they represent a significant source for horticultural biodiversity.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija



POVEZANOST RADA


Ustanove
Prehrambeno-tehnološki fakultet, Osijek