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Aromatic acyl group

The application of standardized UV (or UV-Vis) spectroscopy has for years been used in analyses of flavonoids. These polyphenolic compounds reveal two characteristic UV absorption bands with maxima in the 240 to 285 and 300 to 550 nm range. The various flavonoid classes can be recognized by their UV spectra, and UV-spectral characteristics of individual flavonoids including the effects of the number of aglycone hydroxyl groups, glycosidic substitution pattern, and nature of aromatic acyl groups have been reviewed in several excellent books. ... [Pg.104]

At the plants pH values (3-7), anthocyanins are mostly present as colorless structures. But a stabilizing mechanism takes place. Such effects are provided by complexation of the color form with other species present in the solution, which can be either an identical anthocyanin molecule (self-association), one of its aromatic acyl groups substituents (intramolecular copigmentation) or another molecule (intermolecular copigmentation). [Pg.1808]

B. Sorption isotherm of dyes by the gels having aromatic acyl groups... [Pg.221]

See other pages where Aromatic acyl group is mentioned: [Pg.243]    [Pg.151]    [Pg.260]    [Pg.261]    [Pg.475]    [Pg.482]    [Pg.62]    [Pg.498]    [Pg.509]    [Pg.510]    [Pg.749]    [Pg.117]    [Pg.402]    [Pg.62]    [Pg.361]    [Pg.534]    [Pg.224]    [Pg.222]    [Pg.69]    [Pg.97]    [Pg.39]    [Pg.31]    [Pg.198]   
See also in sourсe #XX -- [ Pg.224 ]



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