Annual and seasonal changes in naringin concentration of ruby red grapefruit juice

Abstract

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Variation in the content of bioactive flavonoids in different brands of orange and grapefruit juices

“…Place of procurement or season may also influence the flavonoid content. For example, naringin content of grapefruit juice from the same grove and trees fluctuated during a season and varied considerably between crop years (Albach et al, 1981). Moreover, citrus juices found to have lower flavonoid content in this study may have greater levels of other bioactive compounds.…”

“…Orange juice producers utilize citrus juice concentrate or fruits from US, Mexico and Brazil. Citrus flavonoid content is influenced by the growing season and location (Albach et al, 1981). We recently reported that bioactive compounds in grapefruit respond differently to post-harvest treatments and processing (Vanamala et al, 2005).…”

Determination of flavonoids and total polyphenol contents in commercial apple juices

“…The amounts of bioactive compounds in fruit, including citrus flavonoids, depend on many factors, including geographic region, climate, soil properties, type of cultivar, growing season, harvest date, storage, low-dose irradiation and other conditions (Albach et al 1981;Patil et al 2004); therefore, the content of flavonoids as well as that of other compounds, can vary greatly.…”

Flavanone and Nootkatone Levels in Different Varieties of Grapefruit and Pummelo

“…These compounds not only play an important physiological and ecological role but are also of commercial interest. For example, it is known that grapefruit and pummelo accumulate naringin as flavonone glycoside in their fruit, leaves, and juice, and, to a lesser extent, they also produce narirutin, prunin, hesperidin, and neohesperidin (Albach and Redman, 1969;Albach et al, 1981;Albach and Wutscher, 1988;Berhow andVandercook, 1989, 1991;Del Rio and Ortufio, 1994;Jourdan et al, 1985;Kamiya et al, 1979;Kanes et al, 1993;Robertson and Nisperos, 1983;Rouseff et al, 1987;Shaw et al, 1991;Sinclair, 1972).…”