Antioxidant activity and polyphenols of Aronia in comparison to other berry species (CROSBI ID 521460)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | domaća recenzija
Podaci o odgovornosti
Jakobek, Lidija ; Šeruga, Marijan ; Medvidović-Kosanović, Martina ; Novak, Ivana
engleski
Antioxidant activity and polyphenols of Aronia in comparison to other berry species
Berries are delicious, low energy fruit, rich in antioxidant vitamins, fibre and various polyphenolic compounds. They are studied intensively, because of the possible beneficial effects of polyphenols on human health. In Croatia, berries like red raspberries, blackberries and strawberries are commonly used in diet, but aronia is almost unknown fruit. In this work total polyphenols and total anthocyanins were determined in aronia (Aronia melanocarpa), blackberry (Rubus fruticosus), red raspberry (Rubus idaeus) and strawberry (Fragaria anannassa) by using Folin-Ciocalteau and pH differential method, respectively. Antioxidant activity was determined by using DPPH method. It was found that aronia contains the highest amounts of polyphenols and anthocyanins among the berries studied. It shows the highest antioxidant activity, as well. Therefore, the amount of single flavonols and anthocyanins of aronia was studied further in more details. The amount of flavonols (quercetin, myricetin, kaempferol) and anthocyanins in aronia was determined by using HPLC method. Analysis was conducted on HPLC analytical system (Varian, USA) with UV/Vis and PDA detectors and OmniSpher C18 column. Anthocyanins found in aronia were derivatives of cyanidin of which the most abundant were cyanidin-3-galactoside (68.9%) and cyanidin-3-arabinoside (24.5%). Quercetin was the main flavonol, with 93.07 % of total flavonol amount. The level of kaempferol was low (6.93%) while myricetin was not identified.
aronia; flavonols; anthocyanins
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Podaci o prilogu
2006.
nije evidentirano
objavljeno
Podaci o matičnoj publikaciji
Zbornik sažetaka 2. međunarodnog i 19. hrvatskog Kongresa tehnologa za posliježetvenu tehnologiju "Zrnko 06"
Podaci o skupu
2. međunarodni i 19. hrvatski Kongres tehnologa za posliježetvenu tehnologiju "Zrnko 06"
predavanje
22.11.2006-23.11.2006
Tuheljske Toplice, Hrvatska