A simplified approach for modelling the bacterial growth/no growth boundary

作者:Polese Pierluigi*; Del Torre Manuela; Spaziani Massimiliano; Stecchini Mara Lucia
来源:Food Microbiology, 2011, 28(3): 384-391.
DOI:10.1016/j.fm.2010.09.011

摘要

A simplified growth/no growth (G/NG) model, conceptually derived from the Gamma model and making direct and explicit use of growth limits of bacteria through a normalization constant (eta), was proposed. The eta value, which quantifies the product of the cardinal optimal distances for growth probability, is a species-independent constant. This is of importance when experimental data is missing or insufficient. The simplified G/NG model was developed including the effect of temperature, pH and water activity, and was expanded incorporating the preservative effects. As a practical application, the model was investigated for its ability to describe published data. The successful validation of the simplified G/NG model is discussed in regard to its potential applicability as a first estimate method for the development of safe food products.

  • 出版日期2011-5