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Determination of power-time curves of bacterial growth

Study of lowest growth temperature

Journal of Thermal Analysis and Calorimetry
Authors: Sun Haitao, Nan Zhaodong, Liu Yongjun, Zhang Honglin, and Zhang Tonglei

Bacterial growth power-time curves were determined with a 2277 Thermal Activity Monitor. Bacterial multiplication curves were measured at different temperatures and an experimental model was established. Both growth rate constants and lowest growth temperatures were calculated.

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Journal of Thermal Analysis and Calorimetry
Authors: Liu Yongjun, Ding Yangjun, Nan Zhaodong, Sun Haitao, and Zhang Honglin

Abstract  

The power-time curves of bacterial growth at different temperatures were determined by using the 2277 Thermal Activity Monitor (Sweden). From these curves, the growth rate constant (μ) and activation energy (E a) were calculated. According to the transition state theory of reaction dynamics, the activation entropy (ΔS), activation Gibbs free energy (ΔG) and equilibrium constant (K ) of the activation state could be calculated. These results permitted thermodynamic analysis of the bacterial growth metabolism.

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Abstract  

The power-time curves ofS. flexneri 6,S. flexneri 3b,S. dysenteae andE. coli were determined by using the 2277 Thermal Activity Monitor (Sweden). From these curves, by using a microorganism growth experimental model with inhibitory conditions, the growth rate constant (μ) was determined at different medicinal concentrations, with the optimum allowable concentration of the synthetic medicine.

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Abstract  

Bacterial growth power-time curves were determined by using the 2277 Thermal Activity Monitor. The growth rate constants at different temperatures and acidities were calculated via the optimum growth temperature and optimum growth acidity obtained.

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