engleski

Bacterial chemotaxis and entropy production

Entropy production is calculated for bacterial chemotaxis in the case of a migrating band of bacteria in a capillary tube. It is found that the speed of the migrating band is a decreasing function of the starting concentration of the metabolizable attractant. The experimentally found dependence of speed on the starting concentration of galactose, glucose and oxygen is fitted with power-law functions. It is found that the corresponding exponents lie within the theoretically predicted interval. The effect of the reproduction of bacteria on band speed is considered, too. The acceleration of the band is predicted due to the reproduction rate of bacteria. The relationship between chemotaxis, the maximum entropy production principle and the formation of self-organizing structure is discussed.

bacterial chemotaxis; entropy production

Rad je kao pozvano predavanje prezentiran na skupu: 1st Split Meeting on Development and Applications of Novel Methods and Models in Computational Biophysics and Structural Bioinformatics, održanom od 19.-21.12.2007., Split, Hrvatska, objavljen u Knjizi sažetaka, a sažeci pozvanih oredavanja su na poveznici http://www.pmfst.hr/se/z_fizika/konf/ ; Maximum Entropy Production in the Earth system, održanom od 07.-09.05.2008., Jena, Njemačka, objavljen u Knjizi sažetaka ; From solid state to biophysics IV, održanom od 06-13.06. 2008., Cavtat, Hrvatska, objavljen u Knjizi sažetaka.