Chromatographic analysis of bioactive proanthocyanidins from Quercus durifolia and Quercus eduardii barks

• Autorzy: Rosales-Castro M , González-Laredo R. F , Rocha-Guzmán N. E , Gallegos-Infante J. A , Peralta-Cruz J , Morré J , Karchesy J. J
• Języki publikacji: EN

Abstrakty

EN

Crude acetone extracts (CE) from Quercus durifolia and Quercus eduardii barks were partially purified by liquid extraction with ethyl acetate into organic extracts (OE), and these were separated by a Toyopearl HW-40F column chromatography with acetone-water (3:2) into oligomeric fractions (OLF). OEs were analyzed by HPLC and OLF by HPLC-MS. Screening of the antioxidant capacity of CE, OE, and OLF were performed by scavenging 1,1′-diphenyl-2-picrylhydrazyl (DPPH) radical and ABTS•+ radical cations as well by β-carotene-linoleic acid model system assays. In the bark of both Quercus species the major compound identified in OE was catechin. In OLF the major compounds were monomeric and dimeric monogallate procyanidins, and monomeric, dimeric, trimeric, and tetrameric procyanidins. The best antioxidant capacity was shown by OLF from bark extracts of both species.

Słowa kluczowe

EN

ABTS; antioxidant; bark; DPPH; procyanidins; Quercus

• Wydawca: University of Silesia in Katowice ; Akademiai Kiado
• Czasopismo: Acta Chromatographica
• Rocznik: 2011
• Tom: Vol. 23, no. 3
• Strony: 521--529
• Opis fizyczny: Bibliogr. 18 poz., rys., tab.

Twórcy

autor

Rosales-Castro M

• Instituto Politécnico Nacional Biotechnology Group, CIIDIR Durango Sigma 119 fracc. 20 de noviembre Durango 34220 México, Becario COFAA-IPN

autor

González-Laredo R. F

• Instituto Tecnológico de Durango Chemical and Biochemical Department Durango México, Becario COFAA-IPN

autor

Rocha-Guzmán N. E

• Instituto Tecnológico de Durango Chemical and Biochemical Department Durango México, Becario COFAA-IPN

autor

Gallegos-Infante J. A

• Instituto Tecnológico de Durango Chemical and Biochemical Department Durango México, Becario COFAA-IPN

autor

Peralta-Cruz J

• ENCB-IPN Organic Chemistry Department Durango México, Becario COFAA-IPN

autor

Morré J

• Oregon State University Corvallis OR 97331 USA

autor

Karchesy J. J

• Oregon State University Corvallis OR 97331 USA

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