Naslov
Polifenolni spojevi u starim kultivarima jabuka iz Hrvatske
(Polyphenolic compounds in old apple varieties from Croatia)

Autori
Jakobek, Lidija ; Boc, Martina

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts of International Scientific and Professional Conference 15th Ružička days, Today Science - Tomorrow Industry / Šubarić, Drago - Osijek : Prehrambeno tehnološki fakultet Sveučilišta Josipa Jurja Strossmayera u Osijeku ; Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2014

ISBN
978-953-7005-34-4

Skup
International Scientific and Professional Conference 15th Ružička days, Today Science - Tomorrow Industry

Mjesto i datum
Osijek, Hrvatska, 11.09.2014. - 12.09.2014

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
polifenoli; stari kultivari jabuka; divlja jabuka
(polyphenols; old apple cultivars; wild apple (crabapple))

Sažetak
Apples are often used in the diet because of their availability all year round and represent a significant source of various nutrients. They are a good source of bioactive polyphenolic compounds as well. But there are few data about polyphenols in old, ancient apple varieties that used to be cultivated in the past. That is why in this work polyphenolic compounds in old apple varieties from Croatia were studied (crvenka, pisanika, ledenara, adamova zvijezda, slavonska srčika, wild apple). Polyphenolic compounds were extracted by using ultrasonic bath. Extraction solvents were 80 % methanol (polyphenols from apple flesh), and acidified methanol (0.1% hydrochloric acid) (polyphenols from peel). Total polyphenols were determined by using Folin-Ciocalteu method and total anthocyanins by using pH-differential method. The results showed that old apple varieties have high amount of polyphenolic compounds in the peel (from 2150 mg kg-1 fresh weight in wild apples to 5387 mg kg-1 FW in pisanika) and in the flesh (from 198 mg kg-1 FW in crvenka to 5068 mg kg-1 FW in wild apples). Wild apples can be highlighted among all other investigated apples due to a high total polyphenol content in the flesh which is 86 to 96 % higher the in the flesh of other investigated apples. Furthermore, significant amounts of anthocyanins were found in the peel of red coloured apples (crvenka, pisanika). In conclusion, old apple varieties can be considered as a significant source of polyphenols, 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

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