Modelling Bacterial Dynamics in Food Products: Role of Environmental Noise and Interspecific Competition
Modelling Bacterial Dynamics in Food Products: Role of Environmental Noise and Interspecific Competition作者机构：Department of Veterinary Science Università di Messina Polo Universitario dell’Annunziata Facoltà di Medicina Veterinaria Messina Italy Dipartimento di Fisica e Chimica Group of Interdisciplinary Physics Università di Palermo and CNISM Unità di Palermo Viale delle Scienze Palermo Italy
出 版 物：《Journal of Modern Physics》 (现代物理（英文）)
年 卷 期：2013年第4卷第8期
页 面：1059-1065页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Statistical Mechanics Population Dynamics Noise-Induced Effects Stochastic Modeling Noise in Biological Systems
摘 要：In this paper we review some results obtained within the context of the predictive microbiology, which is a specific field of the population dynamics. In particular we discuss three models, which exploit tools of statistical mechanics, for bacterial dynamics in food of animal origin. In the first model, the random fluctuating behaviour, experimentally measured, of the temperature is considered. In the second model stochastic differential equations are introduced to take into account the influence of physical and chemical variables, such as temperature, pH and activity water, subject to deterministic and random variations. The third model, which is an extended version of the second one, neglects the environmental fluctuations, and concentrates on the role of the interspecific bacterial interactions. The comparison between expected results and observed data indicates that the presence of noise sources and interspecific bacterial interactions improves the predictive features of the models analyzed.
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