Florida grapefruit juice

Lesser PE. Florida grapefruit juice developments. Second International Fruit-Juice Conference, Amsterdam, The Netherlands, 1997. 

Table I. Evaluation of naringin bitterness as a factor in preference of Florida grapefruit juice ...

Mansell RL, McIntosh CA, Vest SE (1983) An analysis of the Umonin and naringin content of grapefruit juice samples collected from florida state test houses. 1 Agric Food Chem 31 156-162... 

This difference in provitamin A is due to (3-carotene. Ting and Deszyck (50) showed red and pink grapefruit juice to contain 1.0 to 1.4 mg of (3-carotene per 100 g of juice when the fruit was fully mature. When calculated on the value of 1.667 International units of vitamin A = 1 pg of (3-carotene, the Florida juice would have contained the equivalent of 1667 to 2334 units of vitamin A/100 g. Purcell (JH, 52) reported approximately one-half this value for red grapefruit juice from Texas fruit. 

Introduction. This test is commonly called centrifuge pulp or fine pulp. The amount of centrifuge pulp contained in frozen concentrated orange juice is regulated in Florida. It is a factor in the U. S. Standards for Grade of grapefruit juice. 

Rouseff, R. Barros, S. Dougherty, M. Martin, S. 1980. A survey of quality factors found in Florida caimed single strength grapefruit juice from 1977-78,1978-79 and 1979-80 seasons. Proc. Fla. State Flort. Soc. 93 286-289. 

There have been only two comprehensive studies made on the elemental content of orange juices produced in the United States. The first of these was reported by Roberts and Gaddum (23) a little over Uo years ago. That study was a spectrographic analysis of the elemental contents of several varieties of Florida oranges and grapefruit which were grown during that period of time. Excerpts from their results are shown in somewhat modified form in Table III. 

Nearly 5 million metric tons of citrus peel and pulp waste materials are produced annually In the manufacturing of concentrated citrus juices In Florida. Although these materials are currently processed Into cattle feed, they are rich In polysaccharides and can be considered as a source of dietary fiber. Alcohol-Insoluble solids (AIS) of 3 different fractions of the processing residues discharged from commercial juice manufacturing equipment were analyzed for pectin, easily hydrolyzable polysaccharides, and cellulose. Two varieties of orange and one of grapefruit that are the predominant citrus fruit used in Juice production were included In this study. 

Fig. F-72 shows that oranges, grapes, apples, and grapefruits are the leading fruit crops in the United States. The citrus fruits require a subtropical climate. Hence, their production is limited mainly to California, Texas, and Florida. The great growth of the citrus industry after World War II was due in large part to advances in the technology for producing frozen juices from these fruits.

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