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Benedict-Roth calorimeter <apparatus, physiology> A device employed to measure the amount of oxygen utilised in quiet breathing in the basal state for the estimation of the basal metabolic rate; the subject rebreathes oxygen through soda lime from a recording spirometer.
(14 Aug 2000)
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bomb calorimeter An instrument which measures the heat released or absorbed during a chemical reaction.
It is used for determining the potential energy of organic substances, including those in foods. It consists of a hollow steel container, lined with platinum and filled with pure oxygen, into which a weighed quantity of substance is placed and ignited with an electric fuse; the heat produced is absorbed by water surrounding the bomb and, from the rise in temperature, the calories liberated are calculated.
(05 Mar 2000)
calorimeter <radiobiology> In conventional fusion research, this name refers to any device used to measure power or energy in a laser or particle beam. (for example, for ICF or neutral beam heating or a magnetically-confined plasma.)
(09 Oct 1997)
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