Abstract
Magnetic nanoparticles are met across many biological species ranging from magnetosensitive bacteria, fishes, bees, bats, rats, birds, to humans. They can be both of biogenetic origin and due to environmental contamination, being either in paramagnetic or ferromagnetic state. The energy of such naturally occurring single-domain magnetic nanoparticles can reach up to 10–20 room in the magnetic field of the Earth, which naturally led to supposition that they can serve as sensory elements in various animals. This work explores within a stochastic modeling framework a fascinating hypothesis of magnetosensitive ion channels with magnetic nanoparticles serving as sensory elements, especially, how realistic it is given a highly dissipative viscoelastic interior of living cells and typical sizes of nanoparticles possibly involved.
Highlights
Influence of weak electromagnetic fields on living species is perceived by many scientists as a controversial subject matter
To obtain the averaged probability h p(ψ, B)i of the ion channel cluster to be in the open state depending on the strength and orientation of the magnetic field, one has to average p( x (φ))
A single prolonged nanoparticle is used instead of a rod made of 5 ÷ 7 such nanoparticles, and, second, a shorter linker is used to restrict the orientational motion of sensor when it fluctuates between two metastable states in response to a change of the magnetic field orientation
Summary
Influence of weak electromagnetic fields on living species is perceived by many scientists as a controversial subject matter. The energy absorption per pulse of 16 μJ/kg sufficient to produce the microwave hearing effect [9,13] in humans is 36,000 times lower that the maximal limit of 576 J/kg permitted in the IEEE C95.1 radiation safety standard [13], and a corresponding pulse-like elevation of temperature is really tiny, about 10−6 ◦ C per pulse [13,15], rapid (about μs) This is currently probably the only one of known profound effects of weak electromagnetic fields on living systems which is explained completely. Epidemiological evidence for follow-up health effects including a spectrum of neuropsychiatric disorders is extensive, see e.g., in [19], and the references therein
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