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Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/752

Título: Tronchuda cabbage (Brassica oleracea L. var. costata DC) seeds: phytochemical characterization and antioxidant potential.
Autor: Ferreres, F.
Sousa, C.
Valentão, P.
Seabra, R.M.
Pereira, J.A.
Andrade, P.B.
Palavras-chave: Tronchuda cabbage seeds
Brassica oleracea L. var. costata DC
Phenolic compounds
Organic acids
Antioxidant capacity
Issue Date: 2007
Editora: Elsevier
Citação: Food Chemistry. ISSN 0308-8146. 101:2 (2007) p. 549-558.
Resumo: Tronchuda cabbage (Brassica oleracea L. var. costata DC) seeds were studied for their chemical composition and antioxidant capacity. Thirteen phenolic compounds were characterized and quantified by reversed-phase HPLC-DAD-MS/MS-ESI and HPLC-DAD, respectively: two sinapoylgentiobiose isomers, three sinapoylglucose isomers, kaempferol-3-(sinapoyl)sophorotrioside-7-glucoside, sinapoylcholine, kaempferol-3,7-diglucoside-40-(sinapoyl)glucoside, three disinapoylgentiobiose isomers, 1,2,20-trisinapoylgentiobiose and 1,2-disinapoylglucose. Seven organic acids (aconitic, citric, ascorbic, malic, quinic, shikimic and fumaric acids) were also identified and quantified by HPLC-UV. The aqueous extract of tronchuda cabbage seeds was investigated for its capacity to act as a scavenger of DPPH- radical and reactive oxygen species (superoxide radical, hydroxyl radical and hypochlorous acid), exhibiting antioxidant capacity in a concentration-dependent manner against all radicals. These results may be attributed to the high content of hydroxycinnamic derivatives and ascorbic acid.
URI: http://hdl.handle.net/10198/752
ISSN: 0308-8146
Appears in Collections:CIMO - Artigos em Revistas Indexados ao ISI
PTV - Artigos em Revistas Indexados ao ISI

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