| AA | antioxidant activity | mg trolox/g dm |
| ABTS | 2.2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid | mg trolox/g dm |
| C | concentration | g/g dm or g/100 g dm |
| Cmax | initial concentration | g/g dm or g/100 g dm |
| Ceq | equilibrium concentration | g/g dm or g/100 g dm |
| Cp | specific heat | J/Kg °C |
| CI | confidence intervals | |
| CUPRAC | Cupric reducing antioxidant capacity | mg trolox/g dm |
| dm | dry matter | |
| Ea | activation energy | J/mol |
| FRAP | Ferric reducing antioxidant power | mg trolox/g dm |
| GAE | gallic acid equivalent | |
| m | mass | kg |
| MRE | mean relative error | (%) |
| n | number of observations | |
| P | ultrasound power | W |
| SE | standard error | |
| t | time | s |
| T | temperature | °C |
| TFC | total flavonoid content | mg catechin/100 g dm |
| TPC | total polyphenol content | mg GAE/g dm |
| UAE | ultrasound assisted extraction | |
| Y | extraction yield | (%) |
| Ycalc | calculated extraction yield | (%) |
| Yeq | equilibrium extraction yield | (%) |
| Yexp | experimental extraction yield | (%) |
| α | kinetic reaction constant of the Weibull model | s−1 |
| αo | pre-exponential factor in Arrhenius equation | s−1 |
| β | shape parameter of the Weibull model |