Table 9. Different mechanisms of antioxidant action and the parameters describing the activity [37].

Mechanism	Reaction	Parameter
HAT	(1) ArOH + X• → ArO•+ XH	(1) B.D.E = H(ArO•) + H(H•)–H(ArOH)
SET-PT	(1) ArOH + X• → ArOH•+ + X–	(1) IP = H(ArOH•+) + H(H+)—H(ArOH)
	(2) ArOH•+ → ArO• + H+	(2) PDE = H(ArO•) + H(H+)–H(ArOH•+)
SPLET	(1) ArOH → ArO−+ H+	(1) PA = H(ArO-) + H(H+)–H(ArOH)
	(2) ArO−+ X• + H+ → ArO• + XH	(2) ETE = H(ArO•) + H(e-)–H(ArO-)