Sour oranges

Mycorrhizal status P levels Sour orange (Citrus aurantium) 47... 

Haggag, E.G. et al., Flavonoids from the leaves of Citrus aurantium (sour orange) and Citrus sinensis (sweet orange), Asian J. Chem., 11, 707, 1999. 

The high demand for authentic vanilla extract as a flavoring agent has resulted in frequent attempts at adulteration. An HPLC method for the quantitation of coumarins as an adulterant in a variety of vanilla flavorings, using a 10-yu.m /xBondapak Cl8 column with MeOH-HzO (40 60, v/v) as the mobile phase, was proposed (156). Phenolic analysis could be used further for the detection of mixtures of fruits in jams (157). The phenolics present in different commercial jams of apricot, plum, peach, strawberry, sour orange, apple, and pear have been compared and the characteristic compounds for each different jam identified for potential use as marker compounds. 

P Mouly, EM Gaydou, J Estienne. Column liquid chromatographic determination of flavanone glycosides in citrus. Application to grapefruit and sour orange juice adulterations. J Chromatog 634 129-134, 1993. 

Both directly and indirectly, flavonoid composition affects the quality of individual citrus cultivars and hybrids. Some cultivars, such as the sour orange, are directly affected by the presence of bitter neohesperidosides to the point they are unpalatable. The quality of other cultivars may be indirectly affected due to the presence of bitterness suppressing flavone neohesperidosides. Certain hybrids, such as the K early, also contain bitter flavanone glycosides at levels which reduce its acceptability. Therefore, the knowledge of the relative type and... 

Jayaprakasha, G.K. Gireimavar, B. Patil, B.S. 2011. Radical scavenging activities of Rio Red grapefruits and Sour orange fruit extracts in different in vitro model systems. Biores. Tech. In press, corrected proof... 

Couture R and Rouseff R. Debittering and deacidifying sour orange Citrus aurantium) juice using neutral and anion exchange resins. J. Food Sci. 1992 57 380-384. 

Penzak SR, Jann MW, Cold A, Hon YY, Desai HD, Gurley BJ. Seville (sour) orange juice synephrine content and cardiovascular effects in normotensive adults. J Clin Pharmacol 2001 41 1059-1063. 

Citrus Rough lemon, tangelo, sour orange 15... 

Figure 6.2 Ion exchange reaction across an anion exchange membrane (deacidification of sour orange juice). A Anion exchange membrane Cit- Citric acid.

Food industry and medical supplies Edible salt production from seawater,23 demineralization of whey,24 recovery of amino acids from fermentation liquor,25 separation of amino acids,26 preparation of lactic acid27, gluconic acid28 amino acids,29 etc. from their salts, stabilization of grape juice30 and pre-treatment of wine,31 deacidification of sour orange juice,32 desalination of soups, desalination of soybean sauce,33 continuous fermentation in the presence of electrodialysis,34 de-ionization of sugar solution.35... 

Sour orange neohesperidin, naringin, hesperidin, narirutin, neoeriocitrin apigenin 7-rutinoside nobiletin, sinensetin, tetramethoxyflavone... 

OCN bigarade marmalade orange Seville orange sour orange... 

Aurantamarin, presumably naringin, is reported (according to C. Tanret, 1886) as responsible for most of the bitter taste of the sour orange (C. aurantium). 

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