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Article
Microbial Inactivation Kinetics Models, Survival Curves Shapes, and the Temporal Distributions of the Individual Germs Deactivation
Regardless of the targeted microbe type, a thermal or nonthermal food preservation or disinfection method’s efficacy is primarily assessed based on its kinetics. Yet, there is growing realization that inactiva...
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Article
On the Time Presentation in Differential Rate Equations of Dynamic Microbial Inactivation and Growth
A dynamic (e.g., non-isothermal) kinetic model of microbial survival during a lethal process or growth under favorable conditions is either in the form of a differential rate equation from the start or obtaine...
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Article
Colorimetric Quick Response (QR) Tags and Other Time-Temperature Indicators (TTIs) for Remote Quality Assessment: Theoretical Kinetics Aspects
The fast-growing use of quick-response tags (QRs), advances in colored inks synthesis for time-temperature integrators (TTIs), and spread of cloud computing, create new opportunities for remote in-situ quality...
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Article
On Modeling the Temperature Effects on Biopolymers and Foods Undergoing Glass Transition without the WLF Equation
Traditionally, the effect of temperature on the rate of biochemical reactions and biological processes in foods, and on the mechanical properties of biopolymers including foods, has been described by the Arrhe...
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Article
Empirical Models of Sigmoid and Non-Sigmoid Hydration and Moisture Sorption Curves
There are several published empirical mathematical models to describe the water content vs. time relationships in dry or dried-food spontaneous hydration, or in deliberate rehydration, similar to or the same a...
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Article
Fully Probabilistic Microbial Inactivation Models: the Markov Chain Reconstruction from Experimental Survival Ratios
During microbial inactivation by a lethal agent (ignoring damage/injury, recovery from damage/injury, etc.), an individual spore or cell can be either viable/alive and countable, or already inactivated/dead an...
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Article
Retrieval of Microbial Inactivation Kinetic Parameters in Chemical Preservation and Disinfection by the Endpoints Method
The response of microorganisms to chemical preservatives and disinfectants can be described by the traditional Chick-Watson-Hom’s (CWH) model or more general Weibullian survival model, of which it is a special...
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Article
Assessing the Pressure’s Direct Contribution to the Efficacy of Pressure-Assisted Thermal Sterilization
In pressure-assisted thermal sterilization process (PATS), most of the microbial inactivation occurs under a combination of high temperature and pressure conditions for which meaningful experimental isothermal...
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Article
Deterministic and stochastic survival models of injured ozonated Giardia cysts
Giardia cysts exposed to short sublethal ozonation in lake waters continue to die-off well after the ozone complete dissipation. This delayed inactivation can be the manifestation of injured cysts’ mortality, ...
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Article
A New Look at Models of the Combined Effect of Temperature, pH, Water Activity, or Other Factors on Microbial Growth Rate
A popular approach to mathematical modeling of the combined effect of temperature, pH, water activity, oxygen tension, and the concentration of salts, sugars, alcohol, and/or antimicrobials on microbial growth...
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Article
Models of the water activity effect on microbial growth rate and initiation
The role water activity, aw, plays in microbial growth by itself or in conjunction with other factors, notably temperature and pH, has been described mathematically by different algebraic models obtained by fitti...
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Article
Correction to: The Thermal Death Time Concept and Its Implications Revisited
A correction to this paper has been published: https://doi.org/10.1007/s12393-021-09287-8
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Article
Microbial Dose-Response Curves and Disinfection Efficacy Models Revisited
The same term “dose-response curve” describes the relationship between the number of ingested microbes or their logarithm, and the probability of acute illness or death (type I), and between a disinfectant’s d...
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Article
The Thermal Death Time Concept and Its Implications Revisited
Apart from actual incubation and/or testing, the mandated way to determine the microbial safety of thermally preserved foods is still anchored in the premise that the isothermal inactivation of bacterial cells...
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Article
Modeling the dynamic kinetics of microbial disinfection with dissipating chemical agents—a theoretical investigation
The most notable microbial survival models of disinfection kinetics are the original and modified versions of the static Chick-Watson-Hom’s (CWH) initially developed for water chlorination. They can all be vie...
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Article
Quantitative Instrumental Assessment of Cooked Rice Stickiness
Stickiness is a major textural characteristic of cooked rice and an important criterion in cultivars classification. Many reports on instrumental evaluation cooked rice stickiness are based on variants of the ...
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Article
The Hurdle Technology Metaphor Revisited
In the original and variants of the hurdle technology metaphor, factors affecting a food preservation process’s efficacy are represented by horizontally spaced athletic hurdles that the targeted microbes have ...
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Article
Models of Sigmoid Equilibrium Moisture Sorption Isotherms With and Without the Monolayer Hypothesis
Among the numerous moisture sorption models, the GAB, an expanded version of the BET equation originally derived for inert gases adsorption on solid surfaces, is the most prominent. Both models are based on di...
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Chapter
Endpoints Method to Predict Microbial Survival, Nutrients Degradation, and Quality Loss at High and Ultra High Temperatures
The traditional methods to predict and assess the safety of a sterilization or pasteurization process are based on kinetic models whose parameters are extracted from the experimental isothermal survival curves...
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Article
Expanded Discrete and Continuous Bĕlehrádek/Ratkowski Models of Microbial Growth Rates Under Oscillating and Extreme Storage Temperatures
The Bĕlehrádek/Ratkowski, also known as the square root model, was originally developed to describe and quantify the temperature dependence of organisms’ growth rate, in terms of a simple power-law expression ...
