Ergodynamic efficiency

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Ergodynamic efficiency


The ergodynamic efficiency, Ξ΅ (compare thermodynamic efficiency), is a power ratio between the output power and the (negative) input power of an energetically coupled process. Since power [W] is the product of a flow and the conjugated thermodynamic force, the ergodynamic efficiency is the product of an output/input flow ratio and the corresponding force ratio. The efficiency is 0.0 in a fully uncoupled system (zero output flow) or at level flow (zero output force). The maximum efficiency of 1.0 can be reached only in a fully (mechanistically) coupled system at the limit of zero flow at ergodynamic equilibrium. The ergodynamic efficiency of coupling between ATP production (DT phosphorylation) and oxygen consumption is the flux ratio of DT phosphorylation flux and oxygen flux (PΒ»/O2 ratio) multiplied by the corresponding force ratio. Compare with the OXPHOS-coupling efficiency.

Abbreviation: Ξ΅

Reference: Gnaiger 1993 Pure Appl Chem


Bioblast linkReferenceYear
Gnaiger E (1993) Efficiency and power strategies under hypoxia. Is low efficiency at high glycolytic ATP production a paradox? In: Surviving hypoxia: Mechanisms of control and adaptation. Hochachka PW, Lutz PL, Sick T, Rosenthal M, Van den Thillart G (eds) CRC Press, Boca Raton, Ann Arbor, London, Tokyo:77-109.1993
Gnaiger E (1993) Nonequilibrium thermodynamics of energy transformations. Pure Appl Chem 65:1983-2002.
Gnaiger E (2020) Mitochondrial pathways and respiratory control. An introduction to OXPHOS analysis. 5th ed. Bioenerg Commun 2020.2.
Bioblast linkReferenceYear
Gnaiger E (1987) Optimum efficiencies of energy transformation in anoxic metabolism. The strategies of power and economy. In Calow P (ed) Evolutionary physiological ecology. Cambridge Univ Press:7-36.1987
Gnaiger E et al ― MitoEAGLE Task Group (2020) Mitochondrial physiology. Bioenerg Commun 2020.1.

MitoPedia concepts: MiP concept, Respiratory control ratio, Ergodynamics 

MitoPedia methods: Respirometry 

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