Predicting Growth of Weissella Viridescens in Culture Medium under Dynamic Temperature Conditions

Publication date: 2016 Source:Procedia Food Science, Volume 7 Author(s): Wiaslan Figueiredo Martins, Daniel Angelo Longhi, Natielle Maria Costa Menezes, Ana Paula Rosa da Silva Camargo, João Borges Laurindo, Gláucia Maria Falcão de Aragão The lactic acid bacteria (LAB) are among the main spoilage microorganisms of foods, and the Weissella viridescens (formerly Lactobacillus viridescens) is well known to cause deterioration on the meat surface in vacuum packed meat products, even under refrigerated conditions. Therefore, this study evaluated the predictive ability of Baranyi and Roberts dynamic model to describe W. viridescens growth in culture medium (which simulates a food rich in nutrients), subjected to dynamic temperature conditions. Baranyi and Roberts primary model was fitted to the growth curves of W. viridescens in culture medium under six different isothermal temperatures (4, 8, 12, 16, 20 and 30°C) previously obtained in our laboratory. Four secondary models (linear, square root, exponential and Arrhenius type) were assessed to describe the influence of temperature on the growth parameters. The square root was the best model to describe temperature influence on μ max parameter. For Y max parameter, the secondary model was considered the mean values obtained experimentally in the studied temperature range. Experimental data were used to evaluate the model predictions under dynamic conditions for two different temperature profiles, NIP-1 (12-16-20-25°C)...
Source: Procedia Food Science - Category: Food Science Source Type: research