Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Orientation of immobilized Paramecium by a magnetic field. (a) Image sequence of a nonswimming neutrally buoyant Paramecium in a 4-T magnetic field in Ficoll solution. (b) Orientation rate as a function of time; t = 0 is set for θ = 45°, θ is defined by the inset. (c) ln (tanθ) versus scaled time, 
where B0 = 6.4 T. Δχp is measured from the slope of the fitted dashed line (see Eq. 1).
