Effects of pure oxygen and reduced oxygen modified atmosphere packaging on the quality and microbial characteristics of fresh-cut pineapple
Introduction. Modified atmosphere packaging (MAP) is a preservation technique currently used by the fresh-cut fruit industry. Fruit quality may vary according to the concentration of oxygen (O2) in the packaging. However, there is no published research on the effects of a pure O2 modified atmosphere...
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Veröffentlicht in: | Fruits (1978) 2015-03, Vol.70 (2), p.101-108 |
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Zusammenfassung: | Introduction. Modified atmosphere packaging (MAP) is a preservation technique currently used by the fresh-cut fruit industry. Fruit quality may vary according to the concentration of oxygen (O2) in the packaging. However, there is no published research on the effects of a pure O2 modified atmosphere in the packaging of fresh-cut pineapple. There are also no comparative studies of the differences between pure O2 and conventional low O2 MAP on the quality of fresh-cut pineapple. Materials and methods. Pineapple slices were sealed with a tray sealer using a polyethylene (PE) / polypropylene (PP) composite film and one of the following atmosphere treatments: (4% O2 + 5% CO2), (100% O2), and ambient air (control). We evaluated the effects on quality and microbial spoilage of fresh-cut pineapple. Results and discussion. Both modified atmosphere treatments delayed decreases in firmness, soluble solid contents (SSC), reducing sugar, and ascorbic acid. Pineapple slices packaged in pure O2 contained lower amounts of sugar and ascorbic acid and displayed more browning than the slices in the low O2 concentration. Additionally, both modified atmosphere treatments strongly delayed the growth of microorganisms. Aerobic bacteria, yeast and mold levels in pineapple slices packaged in pure O2 were higher than those packaged with the low O2 atmosphere during long-term storage. Conclusion. Modified atmosphere packaging using low O2 concentration (4% O2 + 5% CO2) was better able to maintain the quality of fresh-cut pineapple than packaging with pure O2 atmosphere.
Introduction. Le conditionnement sous atmosphère modifiée (MAP) est une technique de conservation actuellement utilisée par l’industrie des fruits frais découpés. La qualité des fruits peut varier en fonction de la concentration en oxygène (O2) dans l’emballage. Pourtant, rares sont les recherches publiées sur l’effet d’une atmosphère en O2 pur dans l’emballage d’ananas fraîchement découpé. De même, il n’existe aucune étude comparative des différences entre l’atmosphère en O2 pur et l’atmosphère classique basse en O2 sur la qualité de l’ananas fraîchement découpé. Matériel et méthodes. Des tranches d’ananas ont été scellées sous film plastique composite en polyéthylène (PE) / polypropylène (PP) et soumis à l’une des conditions atmosphériques suivantes : faible oxygène (4 % O2+ 5 % CO2), oxygène pur (100 % O2) et air ambiant (contrôle). Nous avons évalué les effets d’atmosphères modifiées sur la qualité et l’évolution |
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ISSN: | 0248-1294 1625-967X |
DOI: | 10.1051/fruits/2015003 |