15 Matching Annotations
- Jun 2016
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medium.com medium.com
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Structures naturally re-arrange themselves to increase their metabolic rate.
Does this agree with optimization of metabolic rates in other areas? Consider D'Arcy Wentworth Thompson...
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www.quantamagazine.org www.quantamagazine.org
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From the standpoint of physics, there is one essential difference between living things and inanimate clumps of carbon atoms: The former tend to be much better at capturing energy from their environment and dissipating that energy as heat.
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Chris Jarzynski, now at the University of Maryland, and Gavin Crooks, now at Lawrence Berkeley National Laboratory. Jarzynski and Crooks showed that the entropy produced by a thermodynamic process, such as the cooling of a cup of coffee, corresponds to a simple ratio: the probability that the atoms will undergo that process divided by their probability of undergoing the reverse process (that is, spontaneously interacting in such a way that the coffee warms up). As entropy production increases, so does this ratio: A system’s behavior becomes more and more “irreversible.”
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in a paper appearing online this week in Proceedings of the National Academy of Sciences, Michael Brenner, a professor of applied mathematics and physics at Harvard, and his collaborators present theoretical models and simulations of microstructures that self-replicate.
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the underlying principle driving the whole process is dissipation-driven adaptation of matter.
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In a September paper in the Journal of Chemical Physics, he reported the theoretical minimum amount of dissipation that can occur during the self-replication of RNA molecules and bacterial cells, and showed that it is very close to the actual amounts these systems dissipate when replicating.
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Ilya Prigogine, “Introduction to Thermodynamics of Irreversible Processes”, John Wiley Sons Inc., 1968
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http://www.sciencedirect.com/science/article/pii/0895717794901880
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http://arxiv.org/pdf/1412.1875v1.pdf
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https://www.youtube.com/watch?v=e91D5UAz-f4
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“Thermodynamic Dissipation Theory for the Origin of Life” (arXiv:0907.0042[physics.gen-ph]2009; Earth Syst. Dynam., 2, 37-51, 2011)
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Brooks and Wiley, Evolution as Entropy, U Chicago Press (1986, 2nd edition 1988)
Get a copy to read through.
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2009, K. Michaelian, arXiv:0907.0042 [physics.gen-ph] http://arxiv.org/abs/0907.0042 and again in 2011, K. Michaelian Earth Syst. Dynam., 2, 37-51, 2011 www.earth-syst-dynam.net/2/37/2011/doi:10.5194/esd-2-37-2011
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If England’s approach stands up to more testing, it could further liberate biologists from seeking a Darwinian explanation for every adaptation and allow them to think more generally in terms of dissipation-driven organization. They might find, for example, that “the reason that an organism shows characteristic X rather than Y may not be because X is more fit than Y, but because physical constraints make it easier for X to evolve than for Y to evolve,”
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Philip Marcus of the University of California, Berkeley, and reported in Physical Review Letters
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