Abstract:
:General optimization results from physics indicate that maximum efficiency of a process, in the sense of minimum overall entropy production, is achieved when the rate of entropy production is constant over time, however not in ordinary clock time but on an, in general varying, "eigen time" scale, intrinsic to the system. We identify the eigen time of a biological system with "physiological time," which generally scales with the 1/4 power of body mass, M(1/4), over a vast range of species. Since it is equally well established that metabolic rate scales as M(3/4), it follows that organisms produce entropy at the same intrinsic rate, fulfilling a necessary condition for maximum efficiency, and are all, furthermore, equally efficient on the physiological eigen time scale.
journal_name
Proc Natl Acad Sci U S Aauthors
Andresen B,Shiner JS,Uehlinger DEdoi
10.1073/pnas.082633699keywords:
subject
Has Abstractpub_date
2002-04-30 00:00:00pages
5822-4issue
9eissn
0027-8424issn
1091-6490pii
082633699journal_volume
99pub_type
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