a HUAE conditions are fixed at a mean particle size of 0.355 mm, a
liquid/solid ratio of 12 mL/g, an ethanol concentration of 70–80%,
a temperature of 30–55 ◦C, a 5 min HRE period and a 20 min UAE
period (185 W, 40 kHz, 70% duty cycle).
b Activation energy of extraction.
c Temperature-independent factor.