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Oxidation of ascorbic acid in the presence of nitrites

, : Oxidation of ascorbic acid in the presence of nitrites. Journal of Agricultural & Food Chemistry 44(10): 2948-2950

We have shown that ascorbic acid in neutral aqueous media rather rapidly interacts with nitrite ions to form dehydroascorbic acid. If the acidity of solution is sufficiently high (pH value does not exceed much above apprx 7) and the nitrite concentration is of order of 0.05 M or more, the only mechanism of the reaction under aerobic conditions includes, as the first, rate-limiting reaction step, the nitrosation of ascorbic acid. A second-order reaction kinetics was observed in respect to protons, which determined a sharp acceleration of the ascorbic acid conversion when the acidity of the medium was raised. Hence, a suggestion can be drawn that the presence of nitrites in vegetables under acidic storage strongly increases the decay of vitamin C.

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Accession: 002914071

DOI: 10.1021/jf940643w

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Wootton, D.M.; Ku, D.N., 2001: Fluid mechanics of vascular systems, diseases, and thrombosis. The cardiovascular system is an internal flow loop with multiple branches circulating a complex liquid. The hallmarks of blood flow in arteries are pulsatility and branches, which cause wall stresses to be cyclical and nonuniform. Normal arterial...

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Zheng, K.; Martin, S.D.; Rashidifard, C.H.; Liu, B.; Brezinski, M.E., 2010: In vivo micron-scale arthroscopic imaging of human knee osteoarthritis with optical coherence tomography: comparison with magnetic resonance imaging and arthroscopy. Current treatments for osteoarthritis are pain relief and total joint arthroplasty. There is a clinical need for early osteoarthritis diagnostic methods for potential preventive interventions. The resolution achieved with radiography, magnetic res...

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Mickey M.R.; Cho Y.; Terasaki P.I., 1988: Early graft loss. Transplantation Proceedings 20(1 SUPPL 1): 31-33

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Jensen, M.D.; Braun, J.S.; Vetter, R.J.; Marsh, H.M., 1988: Measurement of body potassium with a whole-body counter: relationship between lean body mass and resting energy expenditure. We conducted studies to determine whether the Mayo whole-body counter could be used to measure body potassium, and thus lean body mass (LBM), and whether moderate obesity alters resting energy expenditure when corrected for LBM. Twenty-four nonobe...

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Fürtig, W., 1975: Improvement of Collins' perfusion solution. Zeitschrift für Urologie und Nephrologie 68(12): 891-893