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Energy Metabolism – as a General Principle – for Modeling the Transfer of Carbon and Tritium across Animals

D. Galeriu, A. Melintescu, Nicholas A. Beresford

NERC Open Research Archive (Natural Environment Research Council), 2009

2 citations

Abstract

For the safe and clean future of nuclear energy robust models of environmental transfer of radionuclides are needed.Tritium and Carbon are life elements and must be treated separately from trace elements.We have analyzed available data and theories to test the hypothesis that both 3 H and 14 C metabolism in mammals can be accounted for by an understanding of energy metabolism.We started with a theory for how metabolic rate varies with body size and temperature, combining this with arguments from ontogenetic growth, energy consumption, zoogeographical and multilevel regulation effects on metabolism.Our hypothesis was that the loss rate of organically bound tritium and carbon from tissues can be assessed from the knowledge of specific metabolic rate and enthalpy of combustion of selected tissues.From organ mass and stable element composition, a generic model has been developed for mammals.Using a simplified milk production and a single metabolic rate for organs, the model can be applied generically across mammals with a minimum of input information.Tests of the model, without calibration, show a remarkable agreement with available experimental data.The model has been applied to humans, farm and wild animals, but it also have been exploratory used for birds.

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