“…The same result was obtained in studies on the effects of natural antioxidants in pork patties and burgers (Carpenter, O'Grady, O'Callaghan, O'Brien, & Kerry, 2007;Garrido, Auqui, Martí, & Linares, 2011). However, after 7 days, the burgers with AA showed the highest degree of alkalinization, most likely because of the hydrolysis of proteins and the degradation of amino acids by bacteria, with the subsequent production of ammonia, amines and other basic substances (Nychas, Drosinos, & Board, 1998;Rodriguez-Calleja, Garcia-Lopez, Santos, & Otero, 2005).…”