EFFECTS OF EXTREMELY-LOW-FREQUENCY ELECTROMAGNETIC-FIELDS FOR IONS INSOLUTIONS - A CYCLOTRON-RESONANCE AND ITS THRESHOLD

It is known experimentally that biological cell membrane transport of ions such as Ca2+ and K+ is affected by the electromagnetic field when it combines the uniform static magnetic field and the extremely low-f requency (ELF) ac electromagnetic field. This is thought to be caused by a contribution of some type of resonance phenomena that is based on the interaction of the ions and the electromagnetic field. Cyclotron resonance has received attention since it has a window effect in the E LF region. Resonance generation, however, is questionable due to solut ion viscosity or the collision of the ions with other molecules in sol ute. In order to understand quantitatively the cyclotron resonance phe nomena, the ion behaviors in solutions placed in an electromagnetic fi eld are analyzed using a mathematical model so that the threshold valu e of the static magnetic field causing resonance is derived. From the computer simulation and analysis results, it is found that the thresho ld value is determined by the ratio of the magnetic flux density of th e static magnetic field and the viscosity coefficient of the solution. The threshold of the magnetic field in regard to the conductivity of the ions was 6.9 x 10(6) T and 8.8 x 10(6) T,respectively, for K+ and Ca2+. The magnetic flux density of such a magnitude is not commonly ta ken. These values are almost identical to the threshold for ion diffus ion. The threshold value of the magnetic field for the ion mobility wa s 5 to 8 larger than the above.