Publications
Sort & Filters
Filters
113 results
113 results
1997
Samuel, A. D. T. & Berg, H. C. Statistical kinetics of the bacterial flagellar motor. Physical Review E 55, 7801–7804 (1997).
Samuel, A. D. T. & Berg, H. C. Statistical kinetics of the bacterial flagellar motor. Physical Review E 55, 7801–7804 (1997).
The statistical behavior of the bacterial flagellar motor matches that of a Poisson stepper that takes at least 400 steps per revolution. Using this fact, we study the effect of motor stochastics on experiments in which fluorescent motors, initially...
1996
Ehlers, Samuel, Berg & Montgomery. Do cyanobacteria swim using traveling surface waves? Proceedings of the National Academy of Sciences 93, 8340–8343 (1996).
Ehlers, Samuel, Berg & Montgomery. Do cyanobacteria swim using traveling surface waves? Proceedings of the National Academy of Sciences 93, 8340–8343 (1996).
Bacteria that swim without the benefit of flagella might do so by generating longitudinal or transverse surface waves. For example, swimming speeds of order 25 microns/s are expected for a spherical cell propagating longitudinal waves of 0.2 micron length...
Samuel, A. D. & Berg, H. Torque-generating units of the bacterial flagellar motor step independently. Biophysical Journal 71, 918–923 (1996).
Samuel, A. D. & Berg, H. Torque-generating units of the bacterial flagellar motor step independently. Biophysical Journal 71, 918–923 (1996).
Measurements of the variance in rotation period of tethered cells as a function of mean rotation rate have shown that the flagellar motor of Escherichia coli is a stepping motor. Here, by measurement of the variance in rotation period as a function of the...
Stone, H. A. & Samuel, A. D. T. Propulsion of Microorganisms by Surface Distortions. Physical Review Letters 77, 4102–4104 (1996).
Stone, H. A. & Samuel, A. D. T. Propulsion of Microorganisms by Surface Distortions. Physical Review Letters 77, 4102–4104 (1996).
Swimming strategies of microorganisms must conform to the principles of self-propulsion at low Reynolds numbers. Here we relate the translational and rotational speeds to the surface motions of a swimmer and, for spheres, make evident novel constraints on...
1995
Samuel & Berg. Fluctuation analysis of rotational speeds of the bacterial flagellar motor. Proceedings of the National Academy of Sciences 92, 3502–3506 (1995).
Samuel & Berg. Fluctuation analysis of rotational speeds of the bacterial flagellar motor. Proceedings of the National Academy of Sciences 92, 3502–3506 (1995).
We measured the dependence of the variance in the rotation rate of tethered cells of Escherichia coli on the mean rotation rate over a regime in which the motor generates constant torque. This dependence was compared with that of broken motors. In either...