| American Type Culture Collection | <cell culture> A key resource for cultured cells, located in Rockville, USA. (12 Dec 1998) |
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| blood specimen collection | The taking of a blood sample to determine its character as a whole, to identify levels of its component cells, chemicals, gases, or other constituents, to perform pathological examination, etc. (12 Dec 1998) |
| patient credit and collection | Accounting procedures for determining credit status and methods of obtaining payment. (12 Dec 1998) |
| data collection | Systematic gathering of data for a particular purpose from various sources, including questionnaires, interviews, observation, existing records, and electronic devices. The process is usually preliminary to statistical analysis of the data. (12 Dec 1998) |
| library collection development | Development of a library collection, including the determination and coordination of selection policy, assessment of needs of users and potential users, collection use studies, collection evaluation, identification of collection needs, selection of materials, planning for resource sharing, collection maintenance and weeding, and budgeting. (12 Dec 1998) |
| 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) |
| 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) |
| combustion efficiency | Actual heat produced by combustion divided by the total heat potential of the fuel consumed (17 Dec 1998) |
| 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) |