Vrchovska, VendulaSousa, CarlaValentão, PatríciaFerreres, FredericoPereira, J.A.Seabra, Rosa M.Andrade, Paula B.2008-09-032008-09-032006Vrchovska, V.; Sousa, C.; Valentão, P.; Ferreres, F.; Pereira, J.A.; Seabra, R.M.; Andrade, P.B. (2006). Antioxidative properties of tronchuda cabbage (Brassica oleracea L. var. costata DC) external leaves against DPPH, superoxide radical, hydroxyl radical and hypochlorous acid. Food Chemistry. ISSN 0308-8146. 98:3, p. 416-4250308-8146http://hdl.handle.net/10198/744The ability of the aqueous extract of tronchuda cabbage (Brassica oleracea L. var. costata DC) external leaves to act as a scavenger of DPPH- and reactive oxygen species (superoxide radical, hydroxyl radical and hypochlorous acid) was investigated. A phytochemical study was also undertaken, and thirteen phenolic compounds and five organic acids were identified and quantified. Tronchuda cabbage extracts exhibited antioxidant capacity in a concentration-dependent manner in all assays, although some pro-oxidant effect was also noticed. The samples with higher phenolic and organic acid contents displayed the major antioxidant potentials.engTronchuda cabbageBrassica oleracea L. var. costata DCDPPHSuperoxide radicalHydroxyl radicalHypochlorous acidPhenolicsOrganic acidsjournal article10.1016/j.foodchem.2005.06.019