indirect calorimetry


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calorimetry

 [kal″o-rim´ĕ-tre]
measurement of the heat eliminated or stored in any system.
direct calorimetry measurement of the amount of heat produced by a subject enclosed within a small chamber.
indirect calorimetry measurement of the amount of heat produced by a subject by determination of the amount of oxygen consumed and the amount of carbon dioxide eliminated.

in·di·rect cal·o·rim·e·try

determination of heat production of an oxidation reaction by measuring uptake of oxygen and/or liberation of carbon dioxide and nitrogen excretion and then calculating the amount of heat produced.

indirect calorimetry

the measurement of the amount of heat generated in an oxidation reaction by determining the intake or consumption of oxygen or by measuring the amount of carbon dioxide or nitrogen released and translating these quantities into a heat equivalent. Compare direct calorimetry.

in·di·rect ca·lor·i·me·try

(in'di-rekt' kal'ŏr-im'ĕ-trē)
Determination of heat production of an oxidation reaction by measuring uptake of oxygen or liberation of carbon dioxide and nitrogen excretion.

calorimetry

measurement of the heat eliminated or stored in any system.

direct calorimetry
measurement of heat actually produced by the organism which is confined in a sealed chamber or calorimeter.
indirect calorimetry
estimation of the heat produced by means of the respiratory differences of oxygen and carbon dioxide in the inspired and expired air.
References in periodicals archive ?
Net energy of diets containing wheat-corn distillers dried grains with solubles as determined by indirect calorimetry, comparative slaughter, and chemical composition methods.
The study estimated that when indirect calorimetry is not available, increasing nutritional intake by 27% over energy needs as predicted by HBE would adjust for the surgical stress factor and malnutrition in patients with chronic liver disease awaiting transplant.
4) The energy expenditure can then be estimated in a similar way to that in indirect calorimetry.
The objective of the present study was to evaluate the energy values of corn, dried distillers grains with solubles (DDGS) and wheat bran (WB) and discuss the factors that affect the accuracy of estimated NE values for laying hens based on indirect calorimetry method.
Numerous studies have evaluated the correlation between indirect calorimetry and energy expenditure prediction from accelerometer-based technology.
The Sensewear Armband (SWA) Kilocalorie (Kcal) measures appear comparable to indirect calorimetry (IC) for exercise activities; however, agreement between SWA and IC has not been determined for low intensity activities commonly used in rehabilitation.
Indirect calorimetry, a more practical method of measuring [?
Indirect calorimetry is the preferred method for assessing metabolic needs in adult and pediatric patients needing weight reduction as indicated by the American Dietetic Association's Evidence-Based Nutrition Practice Guidelines for Adult and Pediatric Weight Management.
Diet-induced thermogenesis (DIT), which is one of three components for the metabolic rate, was measured over four hours by indirect calorimetry following meals.
Procured supply is two (2) independent systems (one designed for laboratory mice, the second designed for laboratory rats, installed in different rooms unrelated) for indirect calorimetry and behavioral analysis and quantification of food intake, water and spontaneous physical activity specified in more detail in the specification documents, which are part of the instrumentation project biocev module phenotyping.
The comparative slaughter method and the indirect calorimetry method have been used to measure energy retention or total heat production for pigs.
The most common procedure to assess the energy demand during physical activities is indirect calorimetry based upon the oxygen uptake (V[O.