| Online-Ressource |
Verfasst von: | Owen, Robert [VerfasserIn]  |
| Haubner, R. [VerfasserIn]  |
| Hull, William Edmund [VerfasserIn]  |
| Erben, G. [VerfasserIn]  |
| Spiegelhalder, Bertold [VerfasserIn]  |
| Bartsch, Helmut [VerfasserIn]  |
| Haber, B. [VerfasserIn]  |
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 |
Isolation and structure elucidation of the major individual polyphenols in carob fibre / Owen, Robert [VerfasserIn]; 29 August 2003 (Online-Ressource)