Bioactive compounds of peels and peeled red Star Ruby (Sunrise) and blond qualities of Jaffa grapefruits were analyzed and their antioxidant potential was assessed. The dietary fibers were determined according to Prosky et al., the total polyphenol content by Folin-Ciocalteu method and measured at 765 nm, minerals and trace elements by atomic absorption spectrometer, phenolic and ascorbic acids...

Effects resulting from the use of reclaimed waters on mandarins and grapefruits are evaluated by measuring the spectral responses of their canopies and the anatomy and the chlorophyll content of their leaves against control trees irrigated with waters provided by an interbasin transfer. Spectral responses from the red (R) and near-infrared (NIR) wavelength bands, and its normalized ratio (NDVI)...

Citrus fruits contain two groups of flavonoid glycosides that have either rutinose (L-rhamnopyranosyl-ct-1,6-glucopyranoside) or neohesperidose (L-rhamnopyranosyl-:-1.2glucopyranosiele) as their saccharide components. Flavonoid rutinosides such as hesperidin. from mandarin oranges, are tasteless, and on the other hand, flavonoid neohesperidosides such as neohesperidin and naringin, from grapefr...

Commercial operations use low-temperature conditioning of citrus fruits to reduce the incidence of chilling injury (CI) during cold storage and quarantine treatments. Rio Red grapefruits (Citrus paradisi Macf) were stored for 12 weeks at 11°C or 5°C; an additional set was temperature conditioned at 16°C for 7 days before storing at 5°C (CD). Every 3 weeks, samples were assessed for chilling inj...

The distinctive color of red grapefruits is due to lycopene, an unusual carotene in citrus. It has been observed that red 'Star Ruby' (SR) grapefruits grown inside the tree canopy develop a more intense red coloration than those exposed to higher light intensities. To investigate the effect of light on SR peel pigmentation, fruit were bagged or exposed to normal photoperiodic conditions, and ch...

Young and unripe oranges and grapefruits stored at 15 degrees or 20 degrees evidenced shortly after harvest a marked increase in respiratory rate, and then a well-defined maximum which was followed by a decrease.Ethylene production by oranges (measured by the manometric method) was observed, with curves parallel to the respiratory curves.The respiratory upsurge was accompanied by color changes ...