Results 181 to 190 of about 1,762 (210)

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.
Sławomir, Wybraniec, Yosef, Mizrahi
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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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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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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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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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Betacyanin biosynthesis in the isolated hypocotyls bei Acetabularia mediterranea

Planta, 1976
Isolated hypocotyls synthesize betacyanin after light exposure in Amaranthus caudatus L. Pigment synthesizing capacity is reduced in the hypocotyls with increased incubation of seedlings in dark after 24h. External feeding of precursors of betacyanin L-tyrosine and DOPA enhances pigment synthesis in the isolated hypocotyls to equal that of intact ...
K N, Guruprasad, M M, Laloraya
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Betacyanin decolourizing enzyme in Amaranthus tricolor seedlings

Phytochemistry, 1983
Abstract The characterization and partial purification of an enzyme from Amaranthus tricolor which decolourizes betacyanin are described. The enzyme occurs in greatest amounts in the roots and in 3.5-4-day-old seedings. Preparation from an acetone powder of roots results in a more active and more stable enzyme than that obtained from crude buffer ...
Daphne C. Elliott, Christopher G. Schultz, Rachel A. Cassar   +2 more
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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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Chromatographic investigation on acyl migration in betacyanins and their decarboxylated derivatives

Journal of Chromatography B, 2008
Chemopreventive and antioxidant action of betalain pigments can differ in dependence on their stereoselective properties, therefore, it is necessary to use relevant methods for monitoring of their possible stereoisomers. Chromatographic characterisation of a group of new isomers of various 6'-O-acylated betacyanins and decarboxylated betacyanins which ...
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The effect of heating conditions on losses and regeneration of betacyanins

Zeitschrift f�r Lebensmittel-Untersuchung und -Forschung, 1985
The losses of Betacyanins during heating at 90 °C and their regeneration after heating were investigated in red beet juice and solutions of pure betanin in different buffers. It was found that the regeneration of pigments during storage of heated samples is greater at 5 °C than at 20 °C.
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