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Verfasst von:Owen, Robert [VerfasserIn]   i
 Haubner, R. [VerfasserIn]   i
 Hull, William Edmund [VerfasserIn]   i
 Erben, G. [VerfasserIn]   i
 Spiegelhalder, Bertold [VerfasserIn]   i
 Bartsch, Helmut [VerfasserIn]   i
 Haber, B. [VerfasserIn]   i
Titel:Isolation and structure elucidation of the major individual polyphenols in carob fibre
Verf.angabe:R.W. Owen, R. Haubner, W.E. Hull, G. Erben, B. Spiegelhalder, H. Bartsch, B. Haber
E-Jahr:2003
Jahr:29 August 2003
Umfang:12 S.
Fussnoten:Gesehen am 23.11.2020
Titel Quelle:Enthalten in: Food and chemical toxicology
Ort Quelle:New York, NY [u.a.] : Elsevier, 1982
Jahr Quelle:2003
Band/Heft Quelle:41(2003), 12, Seite 1727-1738
ISSN Quelle:1873-6351
Abstract:Although it is already known that carob fibre contains several classes of polyphenolic substances, a comprehensive analysis of these has not been conducted to date. Therefore, the major polyphenolic compounds were extracted with organic solvents, and, following fractionation by normal-phase column chromatography on silicic acid, their structures were elucidated by liquid-chromatography electrospray-ionisation mass spectrometry (LC-ESI), nano-electrospray-ionisation mass spectrometry (ESI-MS), and gas-chromatography mass spectrometry (GC-MS). In addition, complete 1H and 13C NMR assignments were obtained for the isolated gallotannins 1,6-di-, 1,2,6-tri- and 1,2,3,6-tetra-O-galloyl-β-d-glucose. Carob fibre was found to contain a rich variety of phenolic antioxidants. A total of 24 polyphenol compounds were identified with a yield of 3.94 g/kg (dry weight). The profile was dominated by gallic acid in various forms: free gallic acid (42% of polyphenols by weight), gallotannins (29%), and methyl gallate (1%), while simple phenols, mainly cinnamic acid, made up about 2% of the total. Flavonoids represented 26% of the polyphenols, and the major components were identified as the glycosides myricetin- and quercetin-3-O-α-l-rhamnoside (ca. 9% and 10%, respectively). These data indicate that carob fibre is rich in both amount and variety of phenolic antioxidant substances, and its inclusion in the diet may have chemopreventive properties.
DOI:doi:10.1016/S0278-6915(03)00200-X
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1016/S0278-6915(03)00200-X
 Volltext: http://www.sciencedirect.com/science/article/pii/S027869150300200X
 DOI: https://doi.org/10.1016/S0278-6915(03)00200-X
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Antioxidants
 Carob fibre
 Flavonoids
 HPLC
 Mass spectrometry
 Mediterranean diet
 NMR
 Polyphenols
K10plus-PPN:1740425901
Verknüpfungen:→ Zeitschrift

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