Postprint version. Published in Biophysical Journal, Volume 40, Issue 1, October 1, 1982, pages 83-85.
NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.
The definitive version is available at http://dx.doi.org/10.1016/S0006-3495(82)84461-5.
A birefringence technique is used to determine the average magnetic moments of magnetotactic bacteria in culture. Differences in are noted between live and dead bacteria, as well as between normal density and high density samples of live bacteria.