| Bertrand, Ivan Georges | <person> 20th century French neurologist. See: Canavan-van Bogaert-Bertrand disease. (05 Mar 2000) |
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| Pavlov, Ivan | <person> Russian physiologist and Nobel laureate, 1849-1936. See: pavlovian conditioning, Pavlov method, Pavlov pouch, Pavlov stomach, Pavlov's reflex. (05 Mar 2000) |
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| Bertrand lens | <physics> A small, low-power lens, usually on a slide for insertion into the drawtube between analyser and ocular. It is used to observe the back focal plane of the objective so as to examine interference figures or as an aid in achieving interference figures. It is apt to be strongly astigmatic. It is used to image the lamp filament in setting up Kohler illumination as well as for centreing dispersion staining stops to the substage aperture diaphragm. (05 Aug 1998) |
| 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) |
| lens, Bertrand | <microscopy> A small convergent lens placed between objectives and eyepiece. The lens focuses an image of the upper focal plane of the objective on the focal plane of the eyepiece. It is chiefly used with polarized light for inspecting the interference figure. It is also convenient for quickly verifying centreing, size, and uniform illumination of an aperture. (05 Aug 1998) |
| Marinesco, Georges | <person> Roumanian neurologist, 1863-1938. See: Marinesco's succulent hand, Marinesco-Garland syndrome, Marinesco-Sjogren syndrome. (05 Mar 2000) |
| Marion, Georges | <person> French urologist, 1869-1932. See: Marion's disease. (05 Mar 2000) |
| Gilles de la Tourette, Georges | <person> French physician, 1857-1904. See: Gilles de la Tourette's disease, Gilles de la Tourette's syndrome, Tourette's disease, Tourette syndrome. (05 Mar 2000) |
| Guillain, Georges | <person> French neurologist, 1876-1961. See: Guillain-Barre reflex, Guillain-Barre syndrome, Landry-Guillain-Barre syndrome. (05 Mar 2000) |
| Roger, Georges Henri | <person> French physiologist, 1860-1946. See: Roger's reflex. (05 Mar 2000) |
| Weill, Georges | <person> French ophthalmologist, 1866-1952. See: Weill-Marchesani syndrome. (05 Mar 2000) |
| Widal, Georges | <person> French physician, 1862-1929. See: Widal's reaction, Widal's syndrome, Gruber-Widal reaction, Hayem-Widal syndrome. (05 Mar 2000) |
| Hayem, Georges | <person> French physician, 1841-1933. See: Hayem's haematoblast, Hayem's solution, Hayem-Widal syndrome. (05 Mar 2000) |
| Nomarski, Georges | <person> 20th century French optical inventor. See: Nomarski optics. (05 Mar 2000) |
| Dieulafoy, Georges | <person> French physician, 1839-1911. See: Dieulafoy's erosion, Dieulafoy's theory. (05 Mar 2000) |
| Dreyer, Georges | <person> English pathologist, 1873-1934. See: Dreyer's formula. (05 Mar 2000) |
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