| SDT | sensory detection theory; right sacrotransverse [fetal position] [Lat. sacrodextra transversa]; sign... |
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| DOI | date of injury; died of injuries; diffusion of innovations [theory] |
| MAUT | multi-attribute utility theory |
| theor | theory, theoretical |
| TSD | target-skin distance; Tay-Sachs disease; theory of signal detectability |
| CPP | Conditioned place preference |
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| CPA | conditioned place aversion |
| DFT | Density Functional Theory |
| IRT | Item Response Theory |
| SDT | Signal Detection Theory |
| place theory | A theory of pitch perception which states that the perception of the pitch of a sound depends upon the level or region of the basilar membrane of the cochlea which is set into vibration by the sound waves. See: resonance theory of hearing. (05 Mar 2000) |
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| cleaning-in-place | <procedure> Cleaning and sterilising a bioreactor system without dismantling it. (14 Nov 1997) |
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| place | 1. To assign a place to; to put in a particular spot or place, or in a certain relative position; to direct to a particular place; to fix; to settle; to locate; as, to place a book on a shelf; to place balls in tennis. "Upon my head they placed a fruitless crown." (Shak) 2. To put or set in a particular rank, office, or position; to surround with particular circumstances or relations in life; to appoint to certain station or condition of life; as, in whatever sphere one is placed. "Place such over them to be rulers." (Ex. Xviii. 21) 3. To put out at interest; to invest; to loan; as, to place money in a bank. 4. To set; to fix; to repose; as, to place confidence in a friend. "My resolution 's placed." 5. To attribute; to ascribe; to set down. "Place it for her chief virtue." (Shak) To place (a person), to identify him. Synonym: See Put. Origin: Cf. F. Placer. See Place. 1. Any portion of space regarded as measured off or distinct from all other space, or appropriated to some definite object or use; position; ground; site; spot; rarely, unbounded space. "Here is the place appointed." (Shak) "What place can be for us Within heaven's bound?" (Milton) "The word place has sometimes a more confused sense, and stands for that space which any body takes up; and so the universe is a place." (Locke) 2. A broad way in a city; an open space; an area; a court or short part of a street open only at one end. "Hangman boys in the market place." 3. A position which is occupied and held; a dwelling; a mansion; a village, town, or city; a fortified town or post; a stronghold; a region or country. "Are you native of this place?" (Shak) 4. Rank; degree; grade; order of priority, advancement, dignity, or importance; especially, social rank or position; condition; also, official station; occupation; calling. "The enervating magic of place." "Men in great place are thrice servants." (Bacon) "I know my place as I would they should do theirs." (Shak) 5. Vacated or relinquished space; room; stead (the departure or removal of another being or thing being implied). "In place of Lord Bassanio." 6. A definite position or passage of a document. "The place of the scripture which he read was this." (Acts viii. 32) 7. Ordinal relation; position in the order of proceeding; as, he said in the first place. 8. Reception; effect; implying the making room for. "My word hath no place in you." (John viii. 37) 9. <astronomy> Position in the heavens, as of a heavenly body; usually defined by its right ascension and declination, or by its latitude and longitude. <mathematics> Place of arms, the act of kicking the ball after it has been placed on the ground. Place name, the name of a place or locality. To give place, to make room; to yield; to give way; to give advantage. "Neither give place to the devil." . "Let all the rest give place." . To have place, to have a station, room, or seat; as, such desires can have no place in a good heart. To take place. To come to pass; to occur; as, the ceremony will not take place. To take precedence or priority. To take effect; to prevail. "If your doctrine takes place." . "But none of these excuses would take place." . To take the place of, to be substituted for. Synonym: Situation, seat, abode, position, locality, location, site, spot, office, employment, charge, function, trust, ground, room, stead. Origin: F, fr. L. Platea a street, an area, a courtyard, from Gr. Platei^a a street, properly fem. Of platys, flat, broad; akin to Skr. Prithu, Lith. Platus. Cf. Flawn, Piazza, Plate, Plaza. Source: Websters Dictionary (01 Mar 1998) |
| Abbe theory of image formation | <optics, physics> Abbe's theory is based on the fact that a non-self-luminous particle, which is illuminated by an extraneous source, gives rise to diffracted light rays, in addition to the dioptric pencil. He stated that to form a good microscopical image as many of the diffracted rays as possible should be intercepted by the objective. With closely ruled lines, his theory is easily demonstrated by observing the back lens of the objective, for here the diffracted rays can be observed directly if the aperture diaphragm is closed. It can be shown that, when the illumination is arranged to exclude the diffracted images, resolution is lost. (11 Mar 1998) |
| adsorption theory of narcosis | That a drug becomes concentrated at the surface of the cell as a result of adsorption, and thus alters permeability and metabolism. (05 Mar 2000) |
| Altmann's theory | A theory that protoplasm consists of granular particles (called bioblasts) that are clustered and enclosed in indifferent matter. (05 Mar 2000) |
| Arrhenius-Madsen theory | That the reaction of an antigen with its antibody is a reversible reaction, the equilibrium being determined according to the law of mass action by the concentrations of the reacting substances. (05 Mar 2000) |
| atomic theory | That chemical compounds are formed by the union of atoms in certain definite proportions; in its modern form, first advanced in 1803 by John Dalton. (05 Mar 2000) |
| Baeyer's theory | That carbon bonds are set at fixed angles (109 |
| balance theory | In social psychology, a theory which assumes that steady and unsteady states can be specified for cognitive units, such as an individual and his or her attitudes or acts, and that such units tend to seek steady states (balance); e.g., balance exists when both parts of a unit are evaluated the same, but disequilibrium arises when both parts are not evaluated the same, which causes either cognitive reevaluation of the parts or their segregation. See: cognitive dissonance theory, consistency principle. (05 Mar 2000) |
| beta-oxidation-condensation theory | <biochemistry> That the two carbon fragments split from the fatty acid molecule by beta-oxidation are converted to acetic acid and then condensed to acetoacetic acid. (05 Mar 2000) |
| Bohr's theory | That spectrum lines are produced 1) by the quantised emission of radiant energy when electrons drop from an orbit of a higher to one of a lower energy level, or 2) by absorption of radiation when an electron rises from a lower to a higher energy level. (05 Mar 2000) |
| Bordeau theory | That each organ of the body manufactured a specific humor which it secreted into the bloodstream. (05 Mar 2000) |
| Bowman's theory | That the urine is formed by passive filtration through the glomeruli and secretion by the epithelium of the tubules, the water and salts being separated from the plasma in the former situation, the urea and other urinary constituents in the latter. Parts of this theory are now known to be wrong. (05 Mar 2000) |
| Bronsted theory | That an acid is a substance, charged or uncharged, liberating hydrogen ions in solution, and that a base is a substance that removes them from solution (e.g., NH4+, CH3COOH, and HSO4- are acids; NH3, CH3COO-, and SO4- are bases); useful in the concept of weak electrolytes and buffers. Compare: Bronsted acid, Bronsted base. (05 Mar 2000) |
| Burn and Rand theory | That stimulation of sympathetic fibres results first in the production of acetylcholine in the postganglionic nerve endings, which then release norepinephrine to act on the active site of the effector cell. (05 Mar 2000) |
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