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Abstrato
Technological Characterization of Lactic Acid Bacteria Isolated from Beef Stored on Vacuum-Packaged and Advanced Vacuum Skin Packaged System
Miranda JM, Samuel A, Nebot CG, Cepeda A, Franco CM and Calo-Mata MP
A total of 91 Lactic Acid Bacteria (LAB) isolated from meat packaged using traditional vacuum packaging (42 strains) or an advanced vacuum skin packaging system (49 strains) were characterised in terms of gas production, proteolytic and lipolytic activity, production of hydrogen peroxide, histamine and bacteriocin-like substances, and haemolytic activity. Thermal resistance of all isolated bacteria was also analysed. No differences were found for most parameters; with the exception of a higher production of bacteriocin-like substances in LAB isolated from meat packaged using advanced vacuum skin packaging than those obtained for isolated from meat packaged using traditional vacuum packaging. LAB isolated from advanced vacuum skin packaged meat had higher thermal resistance than LAB isolated from meat packaged with the traditional vacuum method, both at 55ºC (14.09 min vs. 11.17 min) and at 60ºC (6.87 min vs. 4.64 min). These data could contribute to an explanation for the longer shelf life of meat packed using advanced vacuum skin packaging compared to meat packed with traditional vacuum packaging.