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2022-03-05
摘要翻译:
每一个组织层次上的生命系统中的临界性特征的实例,以及计算的自发出现(朗顿),表明了自组织临界性(SOC)的相关性。但是,将复杂的生物系统外推到生命的起源,会带来一个悖论:简单的有机物--缺乏今天生物分子的“软物质”反应特性--怎么能以受控的方式耗散原始反应的能量来实现它们的“有序”?然而,通过有机物对软磁支架的功能接管(C.F.凯恩斯-史密斯的“晶体支架”),表明了生命的宏观不可逆动力学与微观统计力学可逆定律之间的因果联系。场控结构提供了自举机制--自下而上与自上而下控制的组装:其超顺磁组分服从可逆动力学,但其聚集的H场能量耗散破坏了时间反转对称性。受控(宿主)矿物系统对环境变化的响应性调整将导致其支持的随机有机集合之间的相互耦合;在这里,有机(客体)网络中长程关联的产生可以包括类似SOC的机制。并且,这种合作调整通过改变无机网络的能力来辅助自发过程,从而能够选择功能配置。一个非平衡动力学现在可以驱动以动力学为导向的系统走向一系列相变,适当的有机取代物‘接管’了它的功能。
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英文标题:
《Field-control, phase-transitions, and life's emergence》
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作者:
Gargi Mitra-Delmotte and A. N. Mitra
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最新提交年份:
2012
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分类信息:

一级分类:Quantitative Biology        数量生物学
二级分类:Other Quantitative Biology        其他定量生物学
分类描述:Work in quantitative biology that does not fit into the other q-bio classifications
不适合其他q-bio分类的定量生物学工作
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一级分类:Physics        物理学
二级分类:Biological Physics        生物物理学
分类描述:Molecular biophysics, cellular biophysics, neurological biophysics, membrane biophysics, single-molecule biophysics, ecological biophysics, quantum phenomena in biological systems (quantum biophysics), theoretical biophysics, molecular dynamics/modeling and simulation, game theory, biomechanics, bioinformatics, microorganisms, virology, evolution, biophysical methods.
分子生物物理、细胞生物物理、神经生物物理、膜生物物理、单分子生物物理、生态生物物理、生物系统中的量子现象(量子生物物理)、理论生物物理、分子动力学/建模与模拟、博弈论、生物力学、生物信息学、微生物、病毒学、进化论、生物物理方法。
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英文摘要:
  Instances of critical-like characteristics in living systems at each organizational level as well as the spontaneous emergence of computation (Langton), indicate the relevance of self-organized criticality (SOC). But extrapolating complex bio-systems to life's origins, brings up a paradox: how could simple organics--lacking the 'soft matter' response properties of today's bio-molecules--have dissipated energy from primordial reactions in a controlled manner for their 'ordering'? Nevertheless, a causal link of life's macroscopic irreversible dynamics to the microscopic reversible laws of statistical mechanics is indicated via the 'functional-takeover' of a soft magnetic scaffold by organics (c.f. Cairns-Smith's 'crystal-scaffold'). A field-controlled structure offers a mechanism for bootstrapping--bottom-up assembly with top-down control: its super-paramagnetic components obey reversible dynamics, but its dissipation of H-field energy for aggregation breaks time-reversal symmetry. The responsive adjustments of the controlled (host) mineral system to environmental changes would bring about mutual coupling between random organic sets supported by it; here the generation of long-range correlations within organic (guest) networks could include SOC-like mechanisms. And, such cooperative adjustments enable the selection of the functional configuration by altering the inorganic network's capacity to assist a spontaneous process. A non-equilibrium dynamics could now drive the kinetically-oriented system towards a series of phase-transitions with appropriate organic replacements 'taking-over' its functions.
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PDF链接:
https://arxiv.org/pdf/1204.2525
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