Title :
Magnetic orientation of red blood cell membranes
Author :
Suda, Takao ; Ueno, Shoogo
Author_Institution :
Kagoshima Nat. Coll. of Technol., Japan
fDate :
11/1/1994 12:00:00 AM
Abstract :
The magnetic orientation of human red blood cells (RBCs) and ghosts were investigated under strong magnetic fields (up to 8 T) to clarify the contribution of cell membranes and hemoglobin to magnetic orientation. The hemoglobin was removed from RBCs to obtain the one-cell membrane, ghost cells. It was observed that changes in the electrical resistivity of buffer solutions containing suspended RBCs and ghosts were caused by application of magnetic fields. This phenomenon indicates that both ghosts and RBCs are redirected by a magnetic field. It became clear that RBCs without hemoglobin orient in the direction of magnetic fields. An anisotropy of diamagnetic susceptibility of blood cell membrane contributes to the magnetic orientation of RBCs. The diamagnetic anisotropy of a ghost cell was obtained from measuring changes in electrical resistivities of suspension as ΔX=8.4×10-28
Keywords :
bioelectric phenomena; biological effects of fields; biomagnetism; biomembranes; blood; cellular biophysics; diamagnetic materials; magnetic anisotropy; magnetic susceptibility; proteins; 8 T; buffer solutions; diamagnetic susceptibility anisotropy; electrical resistivity; ghost cells; hemoglobin; human red blood cells; magnetic orientation; one-cell membrane; red blood cell membranes; strong magnetic fields; suspension; Anisotropic magnetoresistance; Biomembranes; Cells (biology); Electric resistance; Magnetic anisotropy; Magnetic field measurement; Magnetic fields; Magnetic levitation; Perpendicular magnetic anisotropy; Red blood cells;
Journal_Title :
Magnetics, IEEE Transactions on
