Effects of Lactoperoxidase System Activation-Oregano Essential Oilor Chlorine on the Quality of Modified Atmosphere Packaged Fresh-Cut Iceberg Lettuce — Oak Academic Publishing
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Effects of Lactoperoxidase System Activation-Oregano Essential Oilor Chlorine on the Quality of Modified Atmosphere Packaged Fresh-Cut Iceberg Lettuce
Unité de Recherche “Bioconservation et Valorisation des Produits Agro-alimentaires (UR 13AGR 02)”, école Supérieure des Industries Alimentaires de Tunis (ESIAT), Tunis, Tunisia
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Unité de Recherche “Bioconservation et Valorisation des Produits Agro-alimentaires (UR 13AGR 02)”, école Supérieure des Industries Alimentaires de Tunis (ESIAT), Tunis, Tunisia
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Unité de Recherche “Bioconservation et Valorisation des Produits Agro-alimentaires (UR 13AGR 02)”, école Supérieure des Industries Alimentaires de Tunis (ESIAT), Tunis, Tunisia
1 Unité de Recherche “Bioconservation et Valorisation des Produits Agro-alimentaires (UR 13AGR 02)”, école Supérieure des Industries Alimentaires de Tunis (ESIAT), Tunis, Tunisia
2 Unité de Recherche “Bioconservation et Valorisation des Produits Agro-alimentaires (UR 13AGR 02)”, école Supérieure des Industries Alimentaires de Tunis (ESIAT), Tunis, Tunisia
3 Unité de Recherche “Bioconservation et Valorisation des Produits Agro-alimentaires (UR 13AGR 02)”, école Supérieure des Industries Alimentaires de Tunis (ESIAT), Tunis, Tunisia
The present work focused on the effects of the Modified Atmosphere Packaging (MAP) 1 (5% O 2 and 10% CO 2 ) or 2 (2% O 2 and 5% CO 2 ) and the previous addition of Lactoperoxidase System (LPS) and Oregano essential oil or chlorine washing on the quality of fresh-cut lettuce during refrigerated storage at +4˚C. Our results showed the significant effect of this combined treatment on quality improvement during storage. Thus, mesophilic bacteria was reduced in treated samples compared to those untreated with number which not exceeded the critical of 5 × 10 7 UFC∙g -1 (p < 0.05). In addition, the elevated O 2 and CO 2 levels created by both atmosphere were not significantly different between the two treatments (p > 0.05). Brightness of lettuce samples was significantly reduced during storage. Thereafter, the PCA data showed the effect of combined treatment on the preservation of hygienic, physico-chemical and sensory quality up to the 7 th day of refrigerated storage of these treated samples. The results obtained draw attention to modified atmosphere packaging lettuce and the addition of bio-preservatives which could be an alternative of choice to replace chlorine to preserve the sanitary quality of green products.
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