pomegranate (punica granatum l.) seed: a comparative study on biochemical composition and oil physicochemical characteristics

the pomegranate seeds of four iranian commercial varieties  (abanmahi (ab), malas (ms), pust sefid (ps) and shahvar (sh)) were evaluated in terms of some quality properties including protein, oil, dietary fiber, mineral contents and fatty acid composition. physicochemical properties and antioxidant activity of pomegranate seed oils (psos) were also determined. the oil antioxidant activity was measured by 1,1-diphenyl-2-picrylhydrazyl (dpph) radical scavenging capacity. results showed that ps had the highest oil (16.9%) and crude fiber (42.4%), and nutritional value (460.7kcal/100g) among selected varieties. ps had the highest level of phosphorus (2766.3 mg/kg) and magnesium (2052.0mg/kg), while the highest calcium (675.3mg/kg) and potassium (3724.6mg/kg) were related to sh. the main fatty acid identified by gas chromatography was punicic acid ranged from 72.07% for sh to 73.31% for ms (p