File(s) under permanent embargo
Effect of glucose, pH and lactic acid on Carnobacterium maltaromaticum, Brochothrix thermosphacta and Serratia liquefaciens within a commercial heat-shrunk vacuum-package film
journal contribution
posted on 2023-05-20, 14:16 authored by Mohsina, K, David RatkowskyDavid Ratkowsky, John BowmanJohn Bowman, Shane PowellShane Powell, Mandeep KaurMandeep Kaur, Mark TamplinMark TamplinCarnobacterium maltaromaticum, Brochothrix thermosphacta and Serratia liquefaciens are common spoilage organisms found within the microbiome of refrigerated vacuum-packaged (VP) beef. Extending and predicting VP beef shelf-life requires knowledge about how spoilage bacteria growth is influenced by environmental extrinsic and intrinsic factors. Multifactorial effects of pH, lactic acid (LA) and glucose on growth kinetics were quantified for C. maltaromaticum, B. thermosphacta and S. liquefaciens within a heat shrink-wrapped VP commercial film containing a simulated beef medium. LA, pH, and undissociated lactic acid (UDLA) significantly affected bacterial growth rate (p < 0.001), whereas 5.55 mM glucose produced a marginal effect. At 1.12 mM UDLA, growth rate and maximum population density decreased 20.9 and 3.5%, 56 and 7%, and 11 and 2% for C. maltaromaticum, B. thermosphacta, and S. liquefaciens, respectively.
History
Publication title
Food MicrobiologyVolume
91Article number
103515Number
103515Pagination
1-6ISSN
0740-0020Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Academic Press Ltd Elsevier Science LtdPlace of publication
24-28 Oval Rd, London, England, Nw1 7DxRights statement
Copyright 2020 Elsevier Ltd.Repository Status
- Restricted