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Dissertations, Theses, & Student Research in Food Science and Technology

Egg

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Simulation And Validation Of Radio Frequency Heating Of Shell Eggs, Soon Kiat Lau Jul 2015

Simulation And Validation Of Radio Frequency Heating Of Shell Eggs, Soon Kiat Lau

Dissertations, Theses, & Student Research in Food Science and Technology

Finite element models were developed with the purpose of finding an optimal radio frequency (RF) heating setup for pasteurizing shell eggs. Material properties of the yolk, albumen, and shell were measured and fitted into equations that were used as inputs for the model. When the egg was heated by itself, heating tend to be focused at the air cell to result in a “coagulation ring.” The focused heating near the air cell of the egg prevented satisfactory pasteurization of the egg, but deeper analysis of the simulation results offered a new perspective on how non-uniform RF heating could occur in ...


Dynamic Predictive Model For The Growth Of Salmonella Spp. In Liquid Whole Egg And Risk Evaluation Of Egg White Hydrolysates Manufacturing Process For Spore Formers: Bacillus Cereus And Clostridium Perfringens., Aikansh Singh May 2010

Dynamic Predictive Model For The Growth Of Salmonella Spp. In Liquid Whole Egg And Risk Evaluation Of Egg White Hydrolysates Manufacturing Process For Spore Formers: Bacillus Cereus And Clostridium Perfringens., Aikansh Singh

Dissertations, Theses, & Student Research in Food Science and Technology

A dynamic model for the growth of Salmonella spp. in liquid whole egg under continuously varying temperature was developed and validated. A primary model (Baranyi model) was fitted to each temperature growth data and corresponding maximum growth rates were estimated. Pseudo-R2 values were greater than 0.97 for primary models. The maximum growth rates obtained from each primary model were then plotted against temperature and modeled using the modified Ratkowsky model. The pseudo-R2 and root mean square error were 0.99 and 0.06 h-1, respectively for the secondary model. A dynamic model for the prediction of ...