Document Detail


A human calorimeter for the direct and indirect measurement of 24 h energy expenditure.
MedLine Citation:
PMID:  638125     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
1. A calorimeter for the continuous measurement of heat production and heat loss in the human subject, for at least 24 h, is described. The calorimeter operated on the heat-sink principle for direct calorimetry and an open-circuit system for indirect calorimetry. 2. Sensible heat loss was measured using a water-cooled heat exchanger, and the temperature of water entering the heat exchanger was controlled to maintain a mean temperature gradient of zero across the chamber walls. 3. Evaporative heat loss was determined from ingoing and outgoing wet-and-dry bulb temperatures and air flow-rates. 4. Problems associated with the calculation of evapoative heat loss and the estimation of the volume of incoming air in open-circuit systems are considered. 5. The calibration, limits of accuracy, sources of error and experiments with subjects are discussed.
Authors:
M J Dauncey; P R Murgatroyd; T J Cole
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The British journal of nutrition     Volume:  39     ISSN:  0007-1145     ISO Abbreviation:  Br. J. Nutr.     Publication Date:  1978 May 
Date Detail:
Created Date:  1978-06-28     Completed Date:  1978-06-28     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0372547     Medline TA:  Br J Nutr     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  557-66     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Body Temperature Regulation
Calorimetry / instrumentation,  methods*
Energy Metabolism*
Female
Humans
Male
Middle Aged

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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