KSA Light KSA Dark UAE Arabic Coffee
TPC (g of Tannic Acid equiv./100g of sample) 0.65 ±0.06a 0.82 ±0.01b 0.50 ±0.06c 2.53 ±0.04d
FRAP (g of Tannic Acid equiv./100g of Sample) 2.91 ±0.01a 3.03 ±0.13b 1.99 ±0.10b 8.87 ±0.20c
DPPH (% reduction in absorbance) 70.4 ±1.9a 71.1 ±2.4a 64.9 ±3.0a 73.0 ±2.0a
*Values are Mean ± SD of three determinations. Means within the same raw having different superscripts are significantly different at p ≤ 0.05
Table 3: Total phenolic content (TPC), Ferric reducing antioxidant power (FRAP), and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of roasted date seed extracts and Arabic coffee.*