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Validation of a model describing the effects of temperature and water activity on the growth of psychrotrophic pseudomonads
journal contribution
posted on 2023-05-16, 10:40 authored by Neumeyer, K, Thomas RossThomas Ross, Thomson, G, Thomas McMeekinThomas McMeekinThe reliability of the predictive model for the growth of psychrotrophic pseudomonads was evaluated both under controlled laboratory conditions and in industry conditions using various milks, milk-based products, meat and meat products. The validation process involved monitoring the growth of pseudomonads at various temperatures and comparing the observed generation times to those predicted by the model using bias and accuracy factors. For fluctuating temperatures bias and accuracy factors were used to compare the predicted and observed times to reach various population densities. The psychrotrophic pseudomonad model was shown to predict accurately the growth of pseudomonads in the products tested. In some instances knowledge of the lag phase duration was required to maximise the performance of the model.
History
Publication title
International Journal of Food MicrobiologyVolume
38Pagination
55-63ISSN
0168-1605Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Elsevier SciencePlace of publication
AmsterdamRepository Status
- Restricted