Results 91 to 100 of about 286 (133)

Chlorination of Betacyanins in Several Hypochlorous Acid Systems

Journal of Agricultural and Food Chemistry, 2016
This study presents a comparative evaluation of chlorination of betanin, betanidin, and neobetanin exposed to sodium hypochlorite and myeloperoxidase (MPO)/H2O2/Cl(-) systems. For betanin/betanidin, the chlorination takes place at the aglycone unit, but for neobetanin, no chlorinated products in the reaction mixtures can be detected.
Sławomir Wybraniec, Karolina Starzak, Pietrzkowski, Zbigniew   +2 more
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Fruit Flesh Betacyanin Pigments in Hylocereus Cacti

Journal of Agricultural and Food Chemistry, 2002
Determination of profiles and total contents of betacyanins in cactus fruits of Hylocereus species using chromatographic and spectrophotometric method is described. The investigated species were H. polyrhizus, H. purpusii, H. costaricensis, H. sp. 487 (all red-flesh species and hybrids made among them), and the white- or red-flesh species H.
S. Wybraniec, Mizrahi, Y.
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Betacyanins from vine cactus Hylocereus polyrhizus

Phytochemistry, 2001
The presence of betacyanin pigments and their isoforms has been detected in the fruit of Hylocereus polyrhizus, a vine cactus native to South America. Along with the known betanin and phyllocactin (6'-O-malonylbetanin), a new betacyanin was structurally elucidated as betanidin 5-O-[6'-O-(3"-hydroxy-3"-methyl-glutaryl)-beta-D-glucopyranoside] (proposed ...
Sławomir Wybraniec, Platzner, Itzhak, Geresh, Shimona, Gottlieb, Hugo, Haimberg, Marcela, Mogilnitzki, Michael, Mizrahic, Yosef   +6 more
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Acylated betacyanins from Drosanthemum floribundum

Phytochemistry, 1973
Abstract Four new acylated betacyanins have been isolated from flowers of Drosanthemum floribundum (Haw.) Schwant. These pigments were characterized as hydroxycinnamoyl derivatives of betanin and isobetanin.
Giuseppe Impellizzeri, Mario Piattelli, Sebastiano Sciuto   +2 more
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A method for identification of diastereomers of 2-decarboxy-betacyanins and 2,17-bidecarboxy-betacyanins in reversed-phase HPLC

Analytical and Bioanalytical Chemistry, 2007
A method was developed for identification of diastereomers of 2-decarboxy-betacyanins and 2,17-bidecarboxy-betacyanins chromatographed in reversed-phase high-performance liquid chromatography (HPLC) as pairs of unknown elution order. The method was based on alkaline hydrolysis of selected betacyanin and decarboxylated betacyanin mixtures and subsequent
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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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