Behaviour of erythrocytes in high gradient magnetic field

Shalygin, A.N.; Norina, Svetlana B.; Kondorsky, E.

doi:10.1016/0304-8853(83)90575-9

Cited by 29 publications

(9 citation statements)

References 4 publications

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“…They also found that blood possesses the property of diamagnetic material when oxygenated and paramagnetic when deoxygenated [8]. Since then, several investigators studied the orientation of erythrocytes in magnetic fields of strength 1-8 Tesla [9][10][11]. Moreover, it was found that other cells of blood, except the erythrocytes, like platelets, also orient with the applied magnetic field [12].…”

Section: Introductionmentioning

confidence: 95%

Biofluid flow in a channel under the action of a uniform localized magnetic field

Tzirtzilakis

Loukopoulos

2005

Comput Mech

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In this work the fundamental problem of the biomagnetic (blood) fluid flow in a channel under the influence of a steady localized magnetic field is studied. For the mathematical formulation of the problem both magnetization and electrical conductivity of blood are taken into account and blood is considered as a homogeneous Newtonian fluid. For the numerical solution of the problem, which is described by a coupled, non linear system of PDEs, with appropriate boundary conditions, the stream function-vorticity formulation is adopted. The solution is obtained by the development of an efficient numerical technique based on finite differences. Results concerning the velocity and temperature field, skin friction and rate of heat transfer, indicate that the presence of the magnetic field influences considerably the flow field. It is also obtained that the electrical conductivity of blood should be taken into account at the area of the uniform magnetic field. List of symbolsH magnetic field strength (A m À1 ) B magnetic field induction ðB ¼ l o HÞ (Tesla) T temperature (K) T u temperature of upper plate T l temperature of lower plate L length of plates (m) h distance between plates (m) ðx; yÞ components of the cartesian system ðu; vÞ velocity components p pressure q fluid density (kg m À3 ) r electrical conductivity (S m À1 ) l dynamic viscosity (kg m À1 s À1 ) l o magnetic permeability of vacuum (H m À1 ) c p specific heat at constant pressure (J kg À1 K À1 ) k thermal conductivity (J m À1 s À1 K À1 )

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Section: Introductionmentioning

confidence: 95%

Biofluid flow in a channel under the action of a uniform localized magnetic field

Tzirtzilakis

Loukopoulos

2005

Comput Mech

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“…Yamagishi et al [1992] observed diamagnetic orientation of red blood cells under the application of a high magnetic field. Shalygin et al [1983] studied the behavior of erythrocytes under strong magnetic field gradients. They reported a susceptibility for diamagnetic erythrocytes of À(0.13-0.65) Â 10 À8 cgs emu/cm 3 Oe and (13-33) Â 10 À8 cgs emu/cm 3 Oe for paramagnetic erythrocytes.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field influence on electrical properties of human blood measured by impedance spectroscopy

Sosa

Bernal‐Alvarado

Jiménez-Moreno

et al. 2005

Bioelectromagnetics

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The impedance spectroscopy technique (IST) was used for studying the effect of a 0.5 T magnetic field on the electrical properties of whole human blood. A Solartron SI 1260 spectrometer was used to measure the impedance spectra of magnetic field exposed blood samples compared to non-exposed samples. An equivalent electrical circuit model, consisting in a resistance Rs in series with a parallel circuit formed by a constant phase element (CPE) and another resistance Rp, is proposed to fit the data in both cases. The experiment used 3 ml human blood samples from 160 healthy donors. A Wilcoxon matched pairs statistical test was applied to the data. The data analysis seems to show a statistically significant increase of the values of resistance Rp (Z = 5.06, P < 0.001) and capacitance CT (Z = 3.32, P < 0.001) of the blood exposed to magnetic field, by approximately 10.4% and 1.9%, respectively.

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“…Various devices combining strong homogeneous magnetic fields with high gradients near ferromagnetic edges or wires have been developed and successfully applied to separate ferro-para-or diamagnetic particles by few microns in diameters [1][2][3][4][5][6][7] . Magnetic capture of single particles was effectively used to measure magnetic susceptibility of biological immuno-beads and cells 8,9 applying video-recording method.…”

Section: Introductionmentioning

confidence: 99%

Magnetophoretic and optical study of anisotropic magnetic properties of biomicroparticles containing reactive oxygen species or ferritin

Norina

2003

SPIE Proceedings

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Magnetophoretic and optical methods combined with pulsating weak magnetic field 1-10 Hz were applied to observe resonant vibrations of biological microparticles with anisotropic magnetic properties. Modeling of oxidative disorders in tissues was realized using reactive oxygen species (ROS) initiation and ferritin incorporation into porous sorbent beads and blood cells. Microscopic video recording of cells in high gradient magnetic separation allowed to determinate changes of magnetic moments under stress activating influences.

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Behaviour of erythrocytes in high gradient magnetic field

Cited by 29 publications

References 4 publications

Biofluid flow in a channel under the action of a uniform localized magnetic field

Biofluid flow in a channel under the action of a uniform localized magnetic field

Magnetic field influence on electrical properties of human blood measured by impedance spectroscopy

Magnetophoretic and optical study of anisotropic magnetic properties of biomicroparticles containing reactive oxygen species or ferritin

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