Actin myosin system and nanomachine using thermal noise

为了理解肌动蛋白-肌球蛋白系统在肌肉中的运动，提出了随机斜杆模型（SIRM）。SIRM有许多像肌凝蛋白一样从身体上突出的倾斜杆，每当这些杆独立振动时，SIRM总是向一个方向前进。SIRM利用随机共振和随机开场中的倾斜杆将热噪声转换为单向运动。我们具体估计了SIRM作为肌动蛋白-肌球蛋白系统的概念模型的物理特性。如果SIRM的半径为r=5nm，质量为10E-21kg，则估计其随机共振频率接近声子频率10E11rad/s。随机共振振幅为2*10E-11m。此外，该机的物理功约为10e - 18焦耳，几乎等于1ATP水解的能量，产量为10E-10N/头。因此，我们认为肌动蛋白-肌球蛋白系统是利用水分子的随机运动来运动的。

Stochastic Inclined Rods Model (SIRM) is proposed for understanding the movement of actin myosin system in muscle. SIRM has many inclined rods stood out from its body like myosin, and it moves always forward to one direction whenever those rods are independently vibrating. SIRM can convert the thermal noise to the one directional motion by using stochastic resonance and inclined rods in random open fields. We estimate concretely the physical characteristics of SIRM as a conceptual model of actin myosin system. If SIRM have the radius r=5nm and mass 10E-21kg like a myosin molecule, the estimated frequency of stochastic resonance which is nearly phonon frequency 10E11rad/s. The amplitude of stochastic resonance is 2*10E-11m. Moreover, physicalwork of this machine is bout 10E-18joules, which is nearly equal to the energy of 1ATP hydrolysis, and output is 10E-10N/head. As a conclusion, we point out that actin myosin system in muscle utilizing the random motion of water molecules for its movement.