Ferreira, Isabel C.F.R.Barros, LillianSoares, Maria ElisaBastos, Maria de LourdesPereira, J.A.2011-02-252011-02-252006Ferreira, Isabel C.F.R.; Barros, Lillian; Soares, Maria Elisa; Bastos, Maria Lourdes; Pereira, José Alberto (2006). Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different cooper formulations. In XV Congresso Nacional de Bioquímica. Aveirohttp://hdl.handle.net/10198/3549The presence of cooper can catalyse oxidation of fatty acid chains, exerting a deleterious influence over shelf life. Transition metals, which possess two or more valence states with a sui tab le redox potential, act as pro-oxidants even at concentrations lower than 0.1 ppm, and could affect the speed of autoxidation and the direction of hydroperoxide breakdown to volatile le compounds. Being copper a transition metal that even, in small concentration, is a very potent oxidation catalyst, can enter a redox reaction, giving rise to consequent lipid peroxidation phenomenon due to the free radicals producing.engconference object