Effect of ascorbic acid on deterioration of carotenoids and colour in ultrafrozen orange juice

Study of the influence of carotenoid structure and individual carotenoids in the qualitative and quantitative attributes of orange juice colour

“…1 (continued) 2003; Meléndez-Martínez, Vicario, & Heredia, 2007a, 2007b. Likewise, we have reported that the isomerization of epoxycarotenoids in orange juices can bring about colour changes that may be discernible by the consumers (Meléndez-Martínez, Vicario, & Heredia, 2009). Following this research line, we have now applied statistical methods to shed some light on the importance of carotenoids in the colour of orange juices.…”

Carotenoids and fat-soluble vitamins in horse tissues: a comparison with cattle

“…The mobile phase was pumped at 1 ml/min and the chromatograms were monitored at 450 nm for carotenoids, at 325 nm for retinoids and at 280 nm for tocopherol. The compounds were identified by comparison of their spectroscopic and chromatographic characteristics with those of standards obtained from natural sources using recommended procedures as described elsewhere (Meléndez-Martínez et al, 2009). The quantification was performed using calibration curves of standard solutions.…”

Effect of pasture and concentrate diets on concentrations of carotenoids, vitamin A and vitamin E in plasma and adipose tissue of lambs

“…The mobile phase was pumped at 1 mL/min and the chromatograms were monitored at 450 nm for carotenoids, 325 nm for retinoids and 280 nm for tocopherol. The carotenoids detected were identified by comparison of their spectroscopic and chromatographic characteristics with those of standards obtained from natural sources by recommended procedures as described elsewhere (Melé ndez-Martínez et al, 2009). Retinoids and a-tocopherol were identified by using standards from Sigma Chemical (Madrid, Spain).…”