Journal
ACTA ALIMENTARIA
Volume 41, Issue 2, Pages 190-199Publisher
AKADEMIAI KIADO ZRT
DOI: 10.1556/AAlim.41.2012.2.6
Keywords
Punica granatum; organic acids; simple sugars; phenolic compounds; anthocyanins; antioxidant activity; anti-inflammatory activity
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Four ecotypes of pomegranate fruits growing in the Salento area were characterized for their content in terms of total phenols, sugars, organic acids, anthocyanins, antioxidant and anti-inflammatory activity. The results showed that in the fruit juice the amount of phenols ranged between 0.8-1.7 g l(-1); the content in terms of simple sugars was about 140 g l(-1), while the amount of citric and malic acids ranged between 1.4-13.3 and 0.8-7.7 g l(-1), respectively. Seven anthocyanin pigments were found; these were analysed quantitatively and qualitatively by HPLC-DAD-MS and identified as delphinidin 3,5-diglucoside, cyanidin 3,5-diglucoside, pelargonidin 3,5-diglucoside, delphinidin 3-glucoside, cyanidin 3-glucoside, pelargonidin 3-glucoside and cyanidin 3-arabinoside. The antioxidant activity, determined as DPH scavenger and TEAC, ranged between 17.2 and 39.1% and between 9 and 19 mu mol Trolox per ml of juice, respectively. All the pomegranate juices showed an anti-inflammatory activity (measured by COX inhibitory assay) which was compared with two commercial anti-inflammatory drugs (Ibuprofen and Nimesulide).
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