Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 503343
Title Computing energy expenditure from indirect calorimetry data: a calculation exercise
Author(s) Alferink, S.J.J.; Heetkamp, M.J.W.; Gerrits, W.J.J.
Source In: Indirect Calorimetry / Gerrits, Walter, Labussière, Etienne, Wageningen : Wageningen Academic Publishers - ISBN 9789086862610 - p. 275 - 284.
DOI http://dx.doi.org/10.3920/978-90-8686-261-0_14
Department(s) Adaptation Physiology
Animal Nutrition
WIAS
Publication type Peer reviewed book chapter
Publication year 2015
Abstract Energy expenditure (Q) can be accurately derived from the volume of O2 consumed (VO2), and the volume of CO2 (VCO2) and CH4 (VCH4) produced. When the measurements are performed using a respiration chamber, VO2, VCO2 and VCH4 are calculated by the difference between the inflow (l/h) and outflow rates (l/h), plus the change in volume of gas in the chamber between successive measurements. There are many steps involved in the calculation of Q from raw data. These steps are rarely published in full detail, nor are they well documented for the training of students, researchers or technical staff. The objective of this chapter is to provide a complete calculation exercise for students at MSc level and researchers or technicians with little background in indirect calorimetry. Based on an example dataset and using a stepwise approach, the calculations used for calibrations, volumes of gas, Q, the respiratory quotient and activity related Q are explained and illustrated.
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