The anitioxidative potential of strawberry tree (Arbutus unedo L.) leaf and fruit tea (CROSBI ID 670188)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Jurica, Karlo ; Brčić Karačonji, Irena
engleski
The anitioxidative potential of strawberry tree (Arbutus unedo L.) leaf and fruit tea
Antioxidants in herbal infusions and decoctions play the main role in preventing cell damage caused by free radicals. Strawberry tree (Arbutus unedo L.) is a wild evergreen Mediterranean shrub whose leaves and fruit are rich in antioxidants such as phenolics. The aim of this study was to compare total phenolic content (TPC) and antioxidative capacity of A. unedo infusions (prepared by adding boiling water to the dried leaves, freeze-dried fruit or their combination and left to stand at room temperature for 5 or 10 min) and decoctions (prepared by adding boiling water to the samples mentioned above and futher boiled for 5 or 10 min), with or without addition of A. unedo honey. TPC was determined by the Folin–Ciocalteu method and antioxidant activity was estimated by DPPH (2, 2′-diphenyl-1-picrylhydrazyl) assay. Decoctions with longer boiling time showed the highest TPC (59.5-199.5 mg gallic acid equivalents per cup) and the strongest antioxidant activity (521.5-934.3 μmol Trolox equivalents per cup). Strong correlation between TPC and DPPH (r=0.847) indicated that polyphenols are mainly responsible for the radical scavenging properties of A. unedo preparations. Tea temperature on which the honey was added (50 or 70 °C) did not affect TPC and antioxidant activity. Our results also point to a similar total phenolic content and stronger antioxidant activity of A. unedo leaf tea compared with green tea (Camellia sinensis). In summary, the use of infusion and decoction of strawberry tree leaf and fruit could provide considerable benefits for health.
decoction ; DPPH ; infusion ; total phenolic content
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Podaci o prilogu
64-64.
2018.
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objavljeno
Podaci o matičnoj publikaciji
Abstracts of the 2nd International Congress on Food Safety and Quality “Food Life Cycle”
Šostar, Z
Zagreb: Nastavni zavod za javno zdravstvo Dr. Andrija Štampar
Podaci o skupu
2. međunarodni kongres o sigurnosti i kvaliteti hrane = 2nd International Congress on Food Safety and Quality
poster
13.11.2018-16.11.2018
Opatija, Hrvatska