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Swimming trajectories in magnetic field. (a) A set of trajectories with the same initial angles in the magnetic fields indicated. The dashed lines are fits of Eq. 3 to the data. (Inset) A downward and an upward trajectory in a 4.6-T field. The dashed line depicts the boundaries of the chamber (scale bar, 500 μm). (b) Δχp values obtained from fits to trajectories as a function of magnetic field; the dashed line is a linear fit to Δχp vs. B.
