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Combined Effect of Dipping in Oxalic or in Citric Acid and Low O<sub>2</sub> Modified Atmosphere, to Preserve the Quality of Fresh-Cut Lettuce during Storage
oleh: Bernardo Pace, Imperatrice Capotorto, Michela Palumbo, Sergio Pelosi, Maria Cefola
Format: | Article |
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Diterbitkan: | MDPI AG 2020-07-01 |
Deskripsi
Leaf edge browning is the main factor affecting fresh-cut lettuce marketability. Dipping in organic acids as well as the low O<sub>2</sub> modified atmosphere packaging (MAP), can be used as anti-browning technologies. In the present research paper, the proper oxalic acid (OA) concentration, able to reduce respiration rate of fresh-cut iceberg lettuce, and the suitable packaging materials aimed to maintaining a low O<sub>2</sub> during storage, were selected. Moreover, the combined effect of dipping (in OA or in citric acid) and packaging in low O<sub>2</sub> was investigated during the storage of fresh-cut iceberg lettuce for 14 days. Results showed a significant effect of 5 mM OA on respiration rate delay. In addition, polypropylene/polyamide (PP/PA) was select as the most suitable packaging material to be used in low O<sub>2</sub> MAP. Combining OA dipping with low O<sub>2</sub> MAP using PP/PA as material, resulted able to reduce leaf edge browning, respiration rate, weight loss and electrolyte leakage, preserving the visual quality of fresh-cut lettuce until 8 days at 8 °C.