https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28818 -1 in air at 20°C for 1 to 4 h or dipped in an aqueous solution of the NO-donor compound, 2,2’- (hydroxynitrosohydrazino)-bis-ethanamine (diethylene triamine-nitric oxide; DETANO) at concentrations between 10 and 1000 mg L^-1 for 15 s to 60 min, followed by storage at 0°C in air. The most effective treatments were fumigation with 500 µl L^-1 NO for 1 h, and dipping in 500 mg L^-1 DETANO for 5 min. The ability of NO to inhibit the development of browning of different types of lettuces was further investigated on the cut surfaces of four fresh-cut lettuce types (‘Green Oak’, ‘Green Coral’, ‘Baby Cos’, and ‘Butter’) during storage at 5°C. The NO was applied to lettuce strips (i) by fumigation with NO gas for 2 h, (ii) by dipping in DETANO solution dissolved in 0.01 M phosphate buffer pH 6.5, or (iii) by dipping in an aqueous solution of the NO-donor compound, sodium nitroprusside (SNP). Treatment with NO gas, DETANO, or SNP inhibited the development of browning and extended the postharvest life of all four lettuce types. The optimum treatments were dipping in 500 mg L^-1 DETANO or SNP, which resulted in an approximately 60% increase in postharvest life over untreated lettuce slices.]]> Wed 26 Jul 2017 14:41:59 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:14367 -1 DETANO or SNP, which resulted in an approx. 60% increase in post-harvest life over untreated lettuce slices. Fumigation with NO gas at 500 μl^-1resulted in a chemical-type injury, hence the optimum NO gas concentration was 100 μl^-1, which resulted in a 30% increase in post-harvest life. Dipping lettuce slices in 500 mgl^-1 SNP was considered to be the most feasible option for commercial processors due to the stability of SNP in unbuffered water, the universality of its effectiveness on a range of lettuce types, and the lack of any logistical difficulties in incorporating an additional water-dipping step into existing commercial line operations.]]> Sat 24 Mar 2018 08:23:11 AEDT ]]>