Dynamics of Number Fluctuations: Motile Microorganisms

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Science  22 Jun 1973:
Vol. 180, Issue 4092, pp. 1293-1295
DOI: 10.1126/science.180.4092.1293


The time dependence of the intensity of light scattered from motile Escherichia coli bacteria is studied in population densities so low that the intensity autocorrelation function reflects fluctuations in the total number of particles in the scattering region. Measured correlation functions are analyzed by using a random walk model of bacterial motion.