then dissolved in methanol for further
analysis. Aliquots of phenolic extracts were evaporated to dryness
under nitrogen. The residue was re-dissolved in 0.2 mL
water and diluted (1:30) Folin–Ciocalteu’s phenol reagent
(1 mL) was added. After 3 min, 7.5% sodium carbonate
(0.8 mL) was added. After 30 min, the absorbance