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Biophysical Journal 50: 451-455 (1986)
© 1986 the Biophysical Society

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A Study of Magnetic Properties of Magnetotactic Bacteria

E. Wajnberg, L. H. Salvo de Souza, Henrique G. P. Lins de Barros and Darci M. S. Esquivel

ABSTRACT

The first direct measurements of magnetic properties of magnetotactic bacteria from natural samples are presented. Measurements were made at 4.2 K, using a Superconducting Quantum Interfering Device (SQUID) magnetometer. From the magnetization results an anisotropy is obtained that is typical of magnetized ferro- or ferri-magnetic materials. The average magnetic moment of the bacteria determined from the results is in good agreement with the estimated moment from electron microscopy.






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Copyright © 1986 by the Biophysical Society.