Flavone and flavonol glycosides

Harborne, Jeffrey B.; Williams, Christine A.

doi:10.1007/978-1-4899-2913-6_8

Cited by 19 publications

(4 citation statements)

References 171 publications

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“…These polyphenol derivatives accumulate in substantial amounts in vegetative parts of plants and food products included in human diet [1,2]. Due to their phenolic structure ( Fig.…”

Section: General Aspectsmentioning

confidence: 99%

Determination of dissociation constants of flavonoids by capillary electrophoresis

et al. 2005

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Ionization constants of some flavanols (catechin and epicatechin) and flavonols (kaempherol, fisetin, morin, and quercetin) are determined by capillary zone electrophoresis (CZE). This technique allows the determination of pK(a) values until about 12. The pK(a) values obtained are compared with those calculated by the SPARC computational program. This program predicts the microscopic and macroscopic pK(a) values and the order of deprotonation of the different -OH groups. While for catechin and epicatechin the first ionizable OH group occurs in ring 1 and the second ionizable group in ring 2, in flavonols the first deprotonation occurs in ring 2 and the second in ring 1.

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“…These polyphenol derivatives accumulate in substantial amounts in vegetative parts of plants and food products included in human diet [1,2]. Due to their phenolic structure ( Fig.…”

Section: General Aspectsmentioning

confidence: 99%

Determination of dissociation constants of flavonoids by capillary electrophoresis

et al. 2005

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“…Several stress factors (e. g. pathogens, nutrient deficiency, wounding, illumination) can markedly change the phytochemistry of plants (Harborne 1988;Clausen et al 1991;Hartley and Lawton 1991;Julkunen-Tiitto et al 1995 b), and thus affect chemotaxonomic identification. In this study we compared concentrations of 12 secondary metabolites in current growth stems of seedlings and in current growth stems of conspecific 3 to 5-year-old saplings, because knowledge of secondary metabolite production in different developmental stages of plants is a prerequisite for good chemotaxonomical identification (e. g. Harborne et al 1985;Harborne and Williams 1988;Julkunen-Tiitto 1989 b The current-growth stems of seedlings of 1 growing season old (seedling-phase) and the current growth stems of saplings of 3 to 5 years old (sapling-phase) were used for phytochemical analysis. The seedlings were cultivated on prefertilized commercial peat (VAPO) in a greenhouse at the Finnish Forest Research Institute, Punkaharju Research Station, eastern Finland.…”

Section: Hanni Sikanenmentioning

confidence: 99%

Chemical diversity of several Betulaceae species: comparison of phenolics and terpenoids in northern birch stems

Julkunen-Tiitto

Rousi²,

Bryant

et al. 1996

Trees

112

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“…Traditionally, flavonol glycosides have been characterized using paper chromatography, thin-layer chromatography, and UV spectroscopy (). Recently, the application of high-performance liquid chromatography (HPLC) for their separation and quantification has become predominant ( , ). The coupling of HPLC to mass spectrometry methods such as electrospray has been adopted to provide molecular weight information and to generate characteristic fragment ions for structural elucidation.…”

Section: Introductionmentioning

confidence: 99%

Identification and Quantification of Flavonol Glycosides in Almond Seedcoats Using MALDI-TOF MS

Frison-Norrie

Sporns

2002

J. Agric. Food Chem.

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Interest in the molecular composition of almonds is growing, due to their popularity in a wide variety of food formulations. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) is a powerful new technique that can be used to rapidly identify and quantify possible bioactive compounds in these popular tree nuts. Four flavonol glycosides were identified in almond seedcoats for the first time: isorhamnetin rutinoside, isorhamnetin glucoside, kaempferol rutinoside, and kaempferol glucoside. A MALDI-TOF MS methodology was developed using rutin (quercetin-3-rutinoside) as an internal standard to quantitatively determine each of the four flavonol glycosides. Results of MALDI-TOF MS analysis were verified by high performance liquid chromatography.

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Flavone and flavonol glycosides

Cited by 19 publications

References 171 publications

Determination of dissociation constants of flavonoids by capillary electrophoresis

Determination of dissociation constants of flavonoids by capillary electrophoresis

Chemical diversity of several Betulaceae species: comparison of phenolics and terpenoids in northern birch stems

Identification and Quantification of Flavonol Glycosides in Almond Seedcoats Using MALDI-TOF MS

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