| Nicol | William, Scottish physicist, 1768-1851. See: Nicol prism. (05 Mar 2000) |
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| Nicol prism | <physics> A prism, used for polarizing or analysing light, made by cementing together, with Canada balsam, two pieces of calcite in such a way that the extraordinary ray from the first piece passes through the second piece while the ordinary ray is reflected to the side into an absorbing layer of black paint. When two Nicol prisms are crossed, therefore, no light passes through. A polarizing prism made of two pieces of calcite specially cut, ground, polished and cemented. A transmitted beam splits into two polarized components, one of which is refracted into and absorbed by the asphalt mount. The remaining polarized beam is transmitted. Modifications of this prism are common. The Nicol prism (nicol) has generally been superseded by a polarizing film such as Polaroid. See: polars, polarizer, analyser. (05 Aug 1998) |
| Nicolas | Joseph, French physician, *1868. See: Nicolas-Favre disease. (05 Mar 2000) |
| Nicolas-Favre disease | A venereal infection usually caused by Chlamydia trachomatis, and characterised by a transient genital ulcer and inguinal adenopathy in the male; in the female, perirectal lymph nodes are involved and rectal stricture is a common occurrence. Synonym: climatic bubo, Favre-Durand-Nicholas disease, lymphogranuloma inguinale, Nicolas-Favre disease, sixth venereal disease, tropical bubo. (05 Mar 2000) |
| Nicolle | J.H., French microbiologist and Nobel laureate, 1866-1936. See: Nicolle's white mycetoma, Nicolle's stain for capsules. (05 Mar 2000) |
| Nicolle's stain | <technique> For capsules, stain in a mixture of a saturated solution of gentian violet in alcohol-phenol. (05 Mar 2000) |
| Nicolle's white mycetoma | Mycetoma caused by a species of Aspergillus, and producing relatively large granules, about the size of a pea; infection occurs from barley grain. (05 Mar 2000) |
| Nicol prism |
optical device that produces plane-polarized light
Ãâó: wordnet.princeton.edu/perl/webwn
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| Nicolau's septineuritis |
a generalized, diffuse neuritis of the entire nervous system due to the multiplication and migration of viruses in nervous tissue, as occurs in rabies.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| Nicol prism |
a polarizing prism made of Iceland Spar (calcite) cut at a specific angle. Nicol prisms are extremely precise, but very expensive, and may be found on older microscopes. Most petrographic microscopes are now equipped with the less expensive (but highly efficient) polarizing film, but the term upper and lower nicols are still used to refer to the polarizing elements. Microscope Menu
Ãâó: www.soils.org/divs/s9/micromorph/gloss.html
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| Nicol p. |
two slabs of Iceland spar cemented together and deflecting a ray of light in such a way that it is split in two, one part (the ordinary ray) being totally reflected and the other (polarized ray) passing through.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Nicoladoni's s. |
Branham's s.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Nicol | optical device that produces plane-polarized light |
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| Nicol | Italian violin maker in Cremona |
| Nicol | United States anarchist (born in Italy) who with Bartolomeo Vanzetti was convicted of murder and in spite of world-wide protest was executed (1891-1927) |
| Nicol | French philosopher (1638-1715) |
| Nicol | French physicist who founded thermodynamics (1796-1832) |
| Nicol | French painter in the classical style (1594-1665) |
| Nicol | Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543) |
| Nicol | Italian violin maker in Cremona |
| Nicol | English diplomat and author (1886-1968) |
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