Fenton Discoloration of Ultrasonicated Purple Cactus Pear Juice
AbstractThe aim of this study was to evaluate the stability of color, betaxanthin, and betacyanin pigments in the presence of Cu(II)-dependent hydroxyl radicals (HO•) from ultrasonicated purple cactus pear juice at amplitudes of 40%, 60%, and 80%, in comparison to untreated sample. L* parameter of juice treated at 40% and 80% amplitude for 25 and 15 min, respectively (11.3 and 9.3, respectively), were significantly higher compared to the control; b* and hue parameters of juice treated at 80%, 25 min showed values of 1.7 and 0.1, respectively. Color differences (ΔE) were lower (<3) for juices treated at high amplitude (80%) and short times (3–5 min). Juice treated at 40% 15 min, 60% 25 min, 80% 15 and 25 min presented high values of betacyanins (281.7 mg·L−1, 255.9 mg·L−1, 294.4 mg·L−1, and 276.7 mg·L−1, respectively). Betaxanthin values were higher in the juices treated at 40% 5 min and 80% 15 and 25 min (154.2 mg·L−1, 135.2 mg·L−1, and 128.5 mg·L−1, respectively). Purple cactus pear juice exhibited significant chelating activity of copper ions and great stability when exposed to HO•. View Full-Text
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Reyes-Hernández, I.; Cruz-Cansino, N.S.; Santander-Martínez, I.R.; Alanís-García, E.; Delgado-Olivares, L.; Ramírez-Moreno, E.; Ariza-Ortega, J.A.; Omaña-Covarrubias, A.; Torres-Valencia, J.M.; Manríquez-Torres, J.J. Fenton Discoloration of Ultrasonicated Purple Cactus Pear Juice. Molecules 2017, 22, 1344.
Reyes-Hernández I, Cruz-Cansino NS, Santander-Martínez IR, Alanís-García E, Delgado-Olivares L, Ramírez-Moreno E, Ariza-Ortega JA, Omaña-Covarrubias A, Torres-Valencia JM, Manríquez-Torres JJ. Fenton Discoloration of Ultrasonicated Purple Cactus Pear Juice. Molecules. 2017; 22(8):1344.Chicago/Turabian Style
Reyes-Hernández, Isidro; Cruz-Cansino, Nelly S.; Santander-Martínez, Ingrid R.; Alanís-García, Ernesto; Delgado-Olivares, Luis; Ramírez-Moreno, Esther; Ariza-Ortega, José A.; Omaña-Covarrubias, Ariana; Torres-Valencia, Jesús M.; Manríquez-Torres, José J. 2017. "Fenton Discoloration of Ultrasonicated Purple Cactus Pear Juice." Molecules 22, no. 8: 1344.
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