Fig. (2) Effect of grinding procedure on the extraction yield (g / 100 g clove) of eugenol, β-caryophyllene, α-humulene, and eugenyl acetate from clove by SFE at 150 bar, 40 °C, and a supercritical CO2 flow rate of 1.03 × 10−4 kg/s during a dynamic period of 15 min.