Improvement of the Shelf-Life Status of Modified Atmosphere Packaged Camel Meat Using Nisin and Subsp. Leaf Extract
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The impact of combined biopreservation treatment with subsp. leave extracts (.OLE) and nisin on the quality attributes of camel steaks packaged under high O (80%) and CO (20%) atmosphere was investigated during refrigerated (1 ± 1 °C) long-term storage. As measured by reversed phase HPLC/DAD analysis, oleuropein is the phenolic compound most present in the chemical composition of .OLE (63.03%). Camel steaks treated with OLE had a lower concentration of thiobarbituric acid-reactive substances (TBA-RSs) in the course of 30 days of storage. Surface metmyoglobin (MetMb) increased at a reduced rate in .OLE-treated samples compared to control samples. Neither modified atmosphere packaging (MAP) nor biopreservation treatments significantly altered the tenderness of camel steaks, expressed in terms of Warner-Bratzler shear force (WBSF), as compared to control samples. After 30 days of storage, psychrotrophic bacteria and spp. counts were significantly lower in camel steaks treated with a combination of .OLE and nisin than in untreated steaks. Moreover, samples treated with .OLE received higher scores on bitterness acceptability. In sum, the use of combined biopreservation methods could be a sustainable solution for the preservation and promotion of the quality characteristics of camel meat in arid regions.
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