Results 141 to 150 of about 1,112 (179)

Alternative Mechanisms of Betacyanin Oxidation by Complexation and Radical Generation

Journal of Agricultural and Food Chemistry, 2019
The use of natural pigments such as betalains in food and health-related products is often limited by said pigments' relative oxidative stabilities in the products or physiological matrices. Determination of the mechanism of oxidation may inform future development and delivery of better stabilized molecules for improved outcomes.
Agnieszka Kumorkiewicz, Natalia Szmyr, Łukasz Popenda, Zbigniew Pietrzkowski, Sławomir Wybraniec   +4 more
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Betacyanins from flowers of Gomphrena globosa

Phytochemistry, 1992
Abstract The betacyanins gomphrenin I (betanidin 6- O -β-glucoside) and its acylated forms gomphrenin II (betanidin 6- O -[6′- O -( E -4-coumaroyl)-β-glucoside]) and gomphrenin III (betanidin 6- O -[6′- O - E -feruloyl-β-glucoside]) were isolated from flowers of Gomphrena globosa and their structures elucidated by NMR spectroscopy and ion spray ...
Susanne Heuer, Victor Wray, Jörg W. Metzger, Dieter Strack   +3 more
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Betacyanins from fruits of Basella rubra

Phytochemistry, 1993
Abstract Ion spray mass spectrometry and tandem mass spectrometry of the fresh juice from Basella rubra fruits revealed the presence of betanidin monoglucoside as the major betacyanin and its 4-coumaroyl and feruloyl derivatives as minor components.
Werner E. Glässgen, Jörg W. Metzger, Susanne Heuer, Dieter Strack   +3 more
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Betacyanins from Lampranthus sp. (aizoaceae)

Phytochemistry, 1969
Abstract Isolation and characterization of four betacyanins from flowers of Lampranthus sp. is reported. These pigments have been shown to be hydroxycinnamoyl derivatives of betanin and isobetanin.
M. Piattelli, G. Impellizzeri
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[Study of betacyanin-discolorating enzyme].

Biokhimiia (Moscow, Russia), 1977
An enzyme catalyzing the discoloration and breakdown of betacyanins was isolated from beet roots Beta vulgaris by centrifugation in sucrose density gradient (2.5 M, 2.0 M, 1.5 M, 1.0 M, tris-HCl buffer, 0.05 M, pH 7.2), and purified 100-fold. The enzyme activity induced the discoloration of betanin, betanidin.
G A, Soboleva, M S, Ul'ianova, N S, Zakharova, M A, Bokuchava   +3 more
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Effect of continuous far red on betaxanthin and betacyanin synthesis

Phytochemistry, 1973
Abstract Seedlings of Celosia plumosa under prolonged irradiation with far red light synthesize chlorophyll α and betaxanthin. Levulinic acid and 2,4-dinitrophenol, inhibitors of chlorophyll synthesis and cyclic photophosphorylation respectively, reduce betaxanthin synthesis. Pigment formation is also inhibited by actinomycin- D and puromycin, but
Giudici de Nicola M, Piattelli M, AMICO, Vincenzo   +2 more
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Betacyanins from plants and cell cultures of Phytolacca americana

Phytochemistry, 1996
Betacyanins from cell cultures of Phytolacca americana were characterized and compared with those of the stems and ripening fruits of the plant. Whereas in fruits prebetanin (betanin 6'-O-sulphate) and its isoform predominate, in the stem and cell cultures feruloylated derivatives occur as the major components.
W, Schliemann, R W, Joy, A, Komamine, J W, Metzger, M, Nimtz, V, Wray, D, Strack   +6 more
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Mammillarinin: A New Malonylated Betacyanin from Fruits of Mammillaria

Journal of Agricultural and Food Chemistry, 2007
A new betacyanin endogenously occurring in fruits of nine Mammillaria species, i.e., M. roseo-alba (Boedecker), M. donatii (Berge), M. coronata (Scheidweiler), M. karwinskiana (Martius), M. gummifera (Engelmann), M. infernillensis (Craig), M. centricirrha (Lemaire), M. krameri (Muehlenpfordt), and M.
Sławomir Wybraniec, Nowak-Wydra, Barbara   +1 more
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Colorant Properties and Stability ofAmaranthusBetacyanin Pigments

Journal of Agricultural and Food Chemistry, 1998
Color, spectral characteristics, and stability of betacyanin pigments of 21 genotypes from 7 Amaranthus species were evaluated. Wide variation in color characteristics and significant differences in pigment stability were found as much within as between Amaranthus species.
Corke, H, Cai, Y, Sun, M
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Effect of tetraalkylammonium salts on retention of betacyanins and decarboxylated betacyanins in ion-pair reversed-phase high-performance liquid chromatography

Journal of Chromatography A, 2006
The ability of tetraalkylammonium salts to act as ion-pairing agents for betacyanins and mono- as well as bidecarboxylated betacyanins in HPLC on reversed phase is reported. The results indicate substantial and various influences of tetraalkylammonium salt addition to eluent on magnitude and direction of retention time changes of the analytes.
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