The total phenolic contents of the extracts, as obtained from the calibration curve (y = 74.945x 4.5821, R2 = 0.9993, x is the absorbance; y is the concentration of gallic acid solution, lg/ml)
and expressed as gallic acid equivalents (mg gallic acid/g dried extract), ranged from 13.98 mg GAE/g for the 30% ethanol extract to 16.75 mg GAE/g for the 70% ethanol extract (Table 1); 70% ethanol was regarded as the most effective solvent for extracting phenolics from DWGF.