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(a) DPPH radical scavenging activity (µg Trolox equivalent/g sample); (b) ABTS radical scavenging (% Scavenging effect with ABTS/mg) %; (c) Ferric reducing assay, (µg equivalent Trolox/g) of six varieties of date seed powder extracted at three sample to solvent ratios (5:1, 10:1, and 15:1). Different uppercase superscript letters in a variety denote significant differences, p < 0.05.
