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On the calculation of heat production from open-circuit calorimetric measurements

Published online by Cambridge University Press:  09 March 2007

J. A. McLean
J. A. McLean
Affiliation:
Department of Physiology, Hannah Dairy Research Institute, Ayr
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Abstract

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1. The equation used for calculating heat production of ruminant animals is expressed in a new form, convenient for application to open-circuit calorimetry.

2. It is shown that in open-circuit calorimetry the possible error involved in making the assumption that respiratory quotient is equal to unity is small compared with the possible error involved in neglecting methane production.

3. In open-circuit calorimetry heat production can be predicted with accuracy to within ± 2% solely from the measurement of oxygen concentration and ventilation rate.

Type
General Nutrition
Information
British Journal of Nutrition , Volume 27 , Issue 3 , May 1972 , pp. 597 - 600
Copyright
Copyright © The Nutrition Society 1972

References

Brouwer, E. (1965). In Energy Metubolism p.41 [Blaxter, K. L., editor]. London: Academic Press.Google Scholar
Weast, R. C. (editor) (1970–1971). The Handbook of Chemistry and Physics 51st ed.Cleveland, Ohio: The Chemical Rubber Co.Google Scholar
Weir, J. B.de, V. (1949). J. Phyol. Land. 109, 1.Google Scholar