2.2.1. Levels of phenolic compounds:
The concentration of total phenols in the extract was determined with Folin-ciocalteu reagent following the
colorimetric method adapted by Chen & Yen (2007) [10]. Gallic acid was used as a standard for calibration
curve. The phenolic content was expressed as mg Gallic acid equivalents /g (mg GAE/g) of dried weight.