A physical mechanism of magnetoreception: Extension and analysis
A physical mechanism of magnetoreception: Extension and analysis
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DOI：
10.1002/bem.22011
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发表时间：
2017-01-01
影响因子：
1.9
通讯作者：
Prato, Frank S.
中科院分区：
文献类型：
--
作者：
Binhi, Vladimir N.;Prato, Frank S.
提出了弱磁场磁接受的一般物理机制。该机制基于热扰动环境中磁矩的经典岁差动力学，并包括最小的必要参数：回旋磁比、热松弛时间和磁矩状态变化产生的下游事件的速率。在特定的生物物理和生物化学机制参与之前，该机制对初始生物物理磁转导事件的概率施加了一般限制。，而不考虑MF目标的性质和随后的一连串事件。研究表明，在某些情况下，弱磁场的生物效应具有非线性和频率选择性。对这些特性的观测不仅提供了目标的陀螺磁比信息，而且还提供了目标与周围环境相互作用的参数信息。这使人们能够制定实验策略，以确定磁感受的生物物理机制，包括近零中频暴露影响的具体情况。该机制普遍适用于不同性质的磁矩，特别是电子和质子的轨道运动和自旋的磁矩。导出了实验暴露条件，这将导致验证所提出的机制。生物电磁学学报，2017,38(8):481 - 481。(c) 2016 Wiley Periodicals, Inc.；
Proposed is a general physical mechanism of magnetoreception of weak magnetic fields (MFs). The mechanism is based on classical precessional dynamics of a magnetic moment in a thermally disturbed environment and includes a minimum of necessary parametersthe gyromagnetic ratio, thermal relaxation time, and rate of downstream events generated by changes in the state of the magnetic moment. The mechanism imposes general restrictions on the probability of initial biophysical magnetic transduction event before the involvement of specific biophysical and biochemical mechanismsi.e., regardless of the nature of an MF target and the subsequent cascade of events. It is shown that biological effects of weak MFs have, in certain cases, nonlinear and frequency selective properties. The observation of these characteristics provides information not only on the target's gyromagnetic ratio, but also on the parameters of its interaction with the immediate environment. This enables one to develop experimental strategies for identifying the biophysical mechanisms of magnetoreception including the specific case of effects of a near-zero MF exposure. The mechanism is universally applicable to magnetic moments of different nature, in particular, of electron and proton orbital motion and of spins. Experimental exposure conditions are derived which would lead to validation of the proposed mechanism. Bioelectromagnetics. 38:41-52, 2017. (c) 2016 Wiley Periodicals, Inc.