The wonders of magnetism

Abstract

In this acceptance address for the Bioelectromagnetics Society's 2001 d'Arsonval Award, Dr. Tenforde reviews the highlights of the nonionizing field aspects of his research and scientific service career. These are focused in four areas: (a). development and application of microelectrophoretic methods to probe the surface chemistry of normal and cancerous cells; (b). research on the biophysical mechanisms of interaction and the dosimetry of static and extremely low frequency magnetic fields; (c). application of extremely high intensity magnetic fields in several spectroscopic methods for probing the detailed structures of large biological macromolecules; and (d). development of national and international guidelines for the exposure of workers and members of the general public to electromagnetic fields with frequencies spanning the entire nonionizing electromagnetic spectrum.

Bioeffects of moderate-intensity static magnetic fields on cell cultures

“…These organisms have developed systems that employ biogenic magnetite (Fe 3 O 4 ) as field sensors (Hong, 1995), present in magnetotactic bacteria and in various tissues of more complex organisms. Other types of magnetoreception mechanisms that have been identified involve the sensory detection of weak voltages induced by movement through the Earth's magnetic field, a mechanism that has been extensively studied in elasmobranch fish (Tenforde, 2003).…”

The Magnetohydrodynamic Effect and Its Associated Material Designs for Biomedical Applications: A State‐of‐the‐Art Review

“…As the study of MHD sensing applications continues to grow, additional efforts in fl ow sensing were applied to the human body, with early observations of the MHD effect being made in the strong magnetic fi eld of the MRI scanner. [71][72][73] In the environment of an MRI scanner, an MHD-derived voltage overlay has been observed on traditional electrocardiograms (ECG), measures of cardiac electrical activity, known to be induced by interactions between arterial blood fl ow during early systole and the MRI main magnetic fi eld ( B 0 ). [74][75][76] As a large component of human blood consists of erythrocytes and a blood plasma solution of sugars, fat, proteins, and salts, human blood fl ow tends to be conductive, [ 9 ] causing positively and negatively charged blood particles which are fl owing transversely to the strong magnetic fi eld of the MRI scanner to be defl ected by the The usefulness of this technique is limited to inside the MRI scanner, with an applied magnetic fi eld of 3 T, however there are efforts to translate this technology into a stand-alone device for VMHD monitoring and potentially stroke volume or perfusion estimation.…”