Amir Siahpoosh, Fereshteh Gol Fakhrabadi, Fatemeh Jorkesh,
Volume 35, Issue 2 (6-2011)
Abstract
Abstract
Background: The Date palm (Phoenix dactylifera L.) is considered an important source of food for both humans and animals in arid and semi-arid regions. The fruits contain a high percentage of carbohydrate, fat, salts and minerals, protein, vitamins and a high percentage of dietary fiber and poly phenol compounds. This study was carried out to evaluate the antioxidant capacity of methanol and aqueous water extracts from date palm fruit cultivar Dayri, cultivated in Iran.
Methods: Date fruits (Phoenix dactilyfera var dayri) were collected from Abadan in Khozestan. Methanol and aqueous extracts were prepared from fruits by maceration method. DPPH, TEAC and FRAP method were used to evaluate radical scavenging capacity of extracts. Total phenolic content was determined by the Folin–Ciocalteu method.
Result: In DPPH assay IC50 of methanol and aqueous extracts were 4.65 mg/ml and 76.61 µg/ml. TEAC values of methanol and aqueous extracts in 6 min were 9.39 and 9.06. The EC1 of FRAP assay were 5.36 and 2.01 mg/ml. Total phenolic contents of methanol extracts was 3.77 mg of equivalent Tannic acid ⁄g dried extract and 17.42 mg for aqueous extract.
Conclusion: Methanol and aqueous extracts of Date palm fruit have Antioxidant activity. In all tests, aqueous extracts extract had higher antioxidant activity. The higher activity of the aqueous fraction may be attributed to the presence of higher phenolic content.
Keywords: Phoenix dactylifera, Fruits, FRAP, DPPH, TEAC
