| combustion efficiency | Actual heat produced by combustion divided by the total heat potential of the fuel consumed (17 Dec 1998) |
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| carnot efficiency | <radiobiology> Maximum possible efficiency for conversion of thermal energy to useful work (such as electrical energy), as determined by the laws of thermodynamics. The Carnot efficiency (eta) for conversion of thermal to electric energy (for example, the upper limit on efficiency of a steam turbine) is given by (eta) = [ (T-hot) - (T-cold) ] / (T-hot). That is, one gets the efficiency from the values of the input and output temperatures (measured in Kelvin). (09 Oct 1997) |
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| visual efficiency | A rating used in computing compensation for industrial ocular injuries, incorporating measurements of central acuity, visual field, and ocular motility. (05 Mar 2000) |
| heat transfer efficiency | Useful heat output released to the room divided by the actual heat produced in the firebox (17 Dec 1998) |
| quantum efficiency | The number of photons required for the formation of one oxygen molecule in photosynthesis. Varies from 8-14 depending on the system used to measure it. (18 Nov 1997) |
| thermal efficiency | <radiobiology> Ratio of the electric power produced by a power plant to the original amount of heat produced. This measures the efficiency with which the thermal energy is converted to electricity. (09 Oct 1997) |
| efficiency | 1. The quality of being efficient or producing an effect or effects; efficient power; effectual agency. "The manner of this divine efficiency being far above us." (Hooker) 2. <mechanics> The ratio of useful work to energy expended. Efficiency of a heat engine, the ratio of the work done an engine, to the work due to the heat supplied to it. Origin: L. Efficientia. Source: Websters Dictionary (01 Mar 1998) |
| efficiency, organizational | The capacity of an organization, institution, or business to produce desired results with a minimum expenditure of energy, time, money, personnel, materiel, etc. (12 Dec 1998) |
| transformation efficiency | The number of bacterial cells that uptake and express plasmid DNA divided by the mass of plasmid used (in transformants/microgram). (09 Oct 1997) |
| water of combustion | The water formed in the body by oxidation of the hydrogen of the food, the greatest amount being produced in the metabolism of fat (about 117 g/100 g of fat). Synonym: water of combustion. (05 Mar 2000) |
| combustion | <chemistry> The heat-producing reaction of a material with oxygen gas or other oxidant, often producing a flame. (09 Oct 1997) |
| combustion air | The air fed to a fire to provide oxygen for combustion of fuel. It may be preheated before injection into a furnace. (05 Dec 1998) |
| combustion analysis | <technique> A method for determining the chemical composition of a compound by burning the compound under controlled conditions. Often used to determine the relative amounts of carbon and hydrogen in a compound. (09 Oct 1997) |
| combustion equivalent | The heat value of a gram of carbohydrate or fat oxidised outside the body. (05 Mar 2000) |
| combustion gases | The gases released from a combustion process. (05 Dec 1998) |
| combustion reaction | <chemistry> The vigorous and exothermic reaction that takes place between certain substances, particularly organic compounds, and oxygen. (09 Jan 1998) |