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Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/738

Título: Chemical composition and antioxidant activity of tronchuda cabbage internal leaves
Autor: Ferreres, F.
Sousa, C.
Vrchovska, V.
Valentão, P.
Pereira, J.A.
Seabra, R.M.
Andrade, P.B.
Palavras-chave: Tronchuda cabbage internal leaves
Brassica oleracea L. var. costata DC
Phenolics
Organic acids
Antioxidant capacity
Issue Date: 2006
Editora: Springer
Citação: Ferreres, F.; Sousa, C.; Vrchovska, V.; Valentão, P.; Pereira, J.A.; Seabra, R.M.; Andrade, P.B. (2006) - Chemical composition and antioxidant activity of tronchuda cabbage internal leaves. European Food Research and Technology. ISSN 1438-2377. 222:1-2, p. 88-98
Resumo: A phytochemical study was undertaken on the internal leaves of tronchuda cabbage (Brassica oleracea L. var. costata DC). Seventeen phenolic compounds were characterized and quantified by reversed-phase HPLCDAD-ESI-MSn and HPLC/DAD, respectively: quercetin 3-O-sophoroside-7-O-glucoside, 3-p-coumaroylquinic acid, kaempferol 3-O-sophoroside-7-O-glucoside, kaempferol 3-O-(caffeoyl)-sophoroside-7-O-glucoside, sinapoyl glucoside acid, kaempferol 3-O-(sinapoyl)-sophoroside-7-Oglucoside, kaempferol 3-O-(feruloyl)-sophoroside-7-Oglucoside, kaempferol 3-O-(p-coumaroyl)-sophoroside- 7-O-glucoside, 4-p-coumaroylquinic acid, sinapic acid, kaempferol 3-O-sophoroside, 3 isomeric forms of 1,2- disinapoylgentiobiose, 1-sinapoyl-2-feruloylgentiobiose, 1,2,2-trisinapoylgentiobiose and 1,2'-disinapoyl-2-feruloylgentiobiose. Seven organic acids (aconitic, citric, ascorbic, malic, quinic, shikimic and fumaric acids) were also identified and quantified. The hot water extract of tronchuda cabbage internal leaves 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.
URI: http://hdl.handle.net/10198/738
ISSN: 1438-2377
Appears in Collections:CIMO - Artigos em Revistas Indexados ao ISI
PTV - Artigos em Revistas Indexados ao ISI
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