| HofF | height of fundus |
|---|---|
| CO | 1) Cardiac Output = Stroke Volume x HR Stroke Volume °áÁ¤ÀÎÀÚ<... |
| VAN | Vein, Artery, NerveÀÇ ¼øÀ¸·Î |
| EVC | Ellis-van Creveld [syndrome] |
| VdB | van der Bergh [test] |
| VHL | Van Hippel-Lindau disease |
|---|---|
| VWS | Van der Woude syndrome |
| VAN | Vancomycin |
| V(w) | van der Waals volume |
| van't Hoff, Jacobus | <person> Dutch chemist and Nobel laureate, 1852-1911. See: van't Hoff's equation, van't Hoff's law, van't Hoff's theory, Le Bel-van't Hoff rule. (05 Mar 2000) |
|---|---|
| van't Hoff's equation | Equation for osmotic pressure of dilute solutions. See: van't Hoff's law. For any reaction, d(ln Keq/d(1/T) equals -dH/R where Keq is the equilibrium constant, T the absolute temperature, R is the universal gas constant, and dH is the change in enthalpy; thus, plotting ln Keq vs. 1/T allows the determination of dH. (05 Mar 2000) |
| van't Hoff's law | In stereochemistry, all optically active substances have one or more multivalent atoms united to four different atoms or radicals so as to form in space an unsymmetrical arrangement, the osmotic pressure exerted by any substance in very dilute solution is the same that it would exert if present as gas in the same volume as that of the solution; or, at constant temperature, the osmotic pressure of dilute solutions is proportional to the concentration (number of molecules) of the dissolved substance; i.e., the osmotic pressure, π, in dilute solutions is π = RTσci, where R is the universal gas constant, T is the absolute temperature, and ci is the molar concentration of solute i, the rate of chemical reactions increases between two-and three-fold for each 10°C rise in temperature. (05 Mar 2000) |
| van't Hoff's theory | That substances in dilute solution obey the gas laws. Compare: van't Hoff's law. (05 Mar 2000) |
| Le Bel-van't Hoff rule | The number of stereoisomers of an organic compound is 2n where n represents the number of asymmetric carbon atoms (unless there is an internal plane of symmetry). A corollary of their simultaneously announced conclusions, in 1874, that the most probable orientation of the bonds of a carbon atom linked to four groups or atoms is toward the apexes of a tetrahedron, and that this accounted for all then-known phenomena of molecular asymmetry (which involved a carbon atom bearing four different atoms or groups). See: stereoisomerism. (05 Mar 2000) |
| isobar | <physics> The quality or state of being equal in weight, especially in atmospheric pressure. Also, the theory, method, or application of isobaric science. <meteorology> A line connecting or marking places upon the surface of the earth where height of the barometer reduced to sea level is the same either at a given time, or for a certain period (mean height), as for a year; an isopiestic line. Alternative forms: isobare. Origin: Iso- + Gr. Weight. Source: Websters Dictionary (01 Mar 1998) |
| Allen, Edgar Van Nuys | <person> U.S. Physician, 1900-1961. See: Allen's test. (05 Mar 2000) |
| Canavan-van Bogaert-Bertrand disease | Autosomal recessive degenerative disease of infancy; mostly in Jewish infants; onset typically within first 3-4 months of birth, consisting of blindness, psychomotor regression, enlarged head, optic atrophy, hypotonia, spasticity, increased N-acetylaspartic acid urinary excretion. MRI shows enlarged brain, decreased attenuation of cerebral and cerebellar white matter, and normal ventricles. Pathologically, there is increased brain volume and weight, and spongy degeneration in the subcortical white matter. See: leukodystrophy. Synonym: Canavan's sclerosis, Canavan-van Bogaert-Bertrand disease, spongy degeneration of infancy. (05 Mar 2000) |
| van | The front of an army; the first line or leading column; also, the front line or foremost division of a fleet, either in sailing or in battle. "Standards and gonfalons, twixt van and rear, Stream in the air." (Milton) Origin: Abbrev. Fr. Vanguard. 1. A fan or other contrivance, as a sieve, for winnowing grain. 2. [OF. Vanne, F. Vanneau beam feather (cf. It. Vanno a wing) fr. L. Vannus. See Etymology above] A wing with which the air is beaten. "[/Angels] on the air plumy vans received him. " "He wheeled in air, and stretched his vans in vain; His vans no longer could his flight sustain." (Dryden) Origin: L. Vannus a van, or fan for winnowing grain: cf. F. Van. Cf. Fan, Van a wing Winnow. <chemical> A shovel used in cleansing ore. Origin: Cornish. <chemical> To wash or cleanse, as a small portion of ore, on a shovel. Source: Websters Dictionary (01 Mar 1998) |
| van Bogaert encephalitis | <neurology> Chronic progressive illness seen in children a few years after measles infection and involving demyelination of the cerebral cortex. Virus apparently persists in brain cells: usually considered a slow virus disease. (18 Nov 1997) |
| van Bogaert, Ludo | <person> 20th century Belgian neurologist. See: Canavan-van Bogaert-Bertrand disease, van Bogaert encephalitis. (05 Mar 2000) |
| van Buchem, Francis Steven Peter | <person> Dutch internist, *1897. See: van Buchem's syndrome. (05 Mar 2000) |
| van Buchem's syndrome | <syndrome> An inherited skeletal dysplasia, with mandibular enlargement and thickening of the diaphyses and calvaria, and increased serum alkaline phosphatase; autosomal recessive inheritance. Synonym: generalised cortical hyperostosis. (05 Mar 2000) |
| van Buren's disease | A disease of unknown cause in which there are plaques or strands of dense fibrous tissue surrounding the corpus cavernosum of the penis, causing deformity and painful erection; sometimes associated with Dupuytren's contracture. Synonym: penile fibromatosis, van Buren's disease. (05 Mar 2000) |
| van Buren sound | A standard sound, available in several calibers, with a gently curved tip designed to follow the contour of the deep bulbous urethra in the male; used for urethral calibration or dilation. (05 Mar 2000) |
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