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Introducing a novel interaction model structure for the combined effect of temperature and pH on the microbial growth rate.

Abstract：

:Efficient modelling of the microbial growth rate can be performed by combining the effects of individual conditions in a multiplicative way, known as the gamma concept. However, several studies have illustrated that interactions between different effects should be taken into account at stressing environmental conditions to achieve a more accurate description of the growth rate. In this research, a novel approach for modeling the interactions between the effects of environmental conditions on the microbial growth rate is introduced. As a case study, the effect of temperature and pH on the growth rate of Escherichia coli K12 is modeled, based on a set of computer controlled bioreactor experiments performed under static environmental conditions. The models compared in this case study are the gamma model, the model of Augustin and Carlier (2000), the model of Le Marc et al. (2002) and the novel multiplicative interaction model, developed in this paper. This novel model enables the separate identification of interactions between the effects of two (or more) environmental conditions. The comparison of these models focuses on the accuracy, interpretability and compatibility with efficient modeling approaches. Moreover, for the separate effects of temperature and pH, new cardinal parameter model structures are proposed. The novel interaction model contributes to a generic modeling approach, resulting in predictive models that are (i) accurate, (ii) easily identifiable with a limited work load, (iii) modular, and (iv) biologically interpretable.

journal_name

Int J Food Microbiol

journal_title

International journal of food microbiology

authors

Akkermans S,Noriega Fernandez E,Logist F,Van Impe JF

doi

10.1016/j.ijfoodmicro.2016.06.011

subject

Has Abstract

pub_date

2017-01-02 00:00:00

pages

85-96

eissn

0168-1605

issn

1879-3460

pii

S0168-1605(16)30304-X

journal_volume

240

pub_type

杂志文章

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