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  • Title: Nitric oxide inhibition of alcohol dehydrogenase in fresh-cut apples ( Malus domestica Borkh).
    Author: Amissah JG, Hotchkiss JH, Watkins CB.
    Journal: J Agric Food Chem; 2013 Nov 20; 61(46):11076-81. PubMed ID: 24093618.
    Abstract:
    The effects of nitric oxide (NO) and nitrite treatment on alcohol dehydrogenase activity and the shelf life of apple tissue were investigated. Fresh-cut apple slices were stored for 2 days at 6 °C in 0.25-1% NO (v/v, balance N2) or 100% N2 atmospheres. Slices were also treated with 1% NO or 2 mM sodium nitrite (NaNO2) for 20 min, stored for 6 weeks in 100% N2 at 6 °C, and analyzed for acetaldehyde, ethanol, and ethyl acetate accumulation, firmness, and color. Compared with N2 or deionized water controls, treatment with 1% NO or 2 mM NaNO2 inhibited ethanol accumulation, whereas that of acetaldehyde increased. Ethyl acetate accumulation was inhibited only by NO. Slice firmness was not affected by NO or NaNO2 treatment, but slices were darker than the untreated controls. NO and nitrite may extend the shelf life of fresh-cut produce with low concentrations of phenolic compounds.
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