| Clark electrode | An oxygen electrode consisting of the tip of a platinum wire exposed to a thin film of electrolyte covered by a plastic membrane permeable to oxygen but not to water or the electrolyte. When a certain voltage is applied, oxygen is destroyed at the platinum surface; the flow of current is then proportional to the rate at which oxygen can diffuse to the platinum surface from the gas or liquid sample outside the membrane, and is thus a measure of the oxygen pressure in the sample; commonly used to measure oxygen pressure in arterial blood samples. (05 Mar 2000) |
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| Clark's level | The level of invasion of primary malignant melanoma of the skin; limited to the epidermis, I; into the underlying papillary dermis, II; to the junction of the papillary and reticular dermis, III; into the reticular dermis, IV; into the subcutaneous fat, V. The prognosis is worse with each successive deeper level of invasion. (05 Mar 2000) |
| Clark's weight rule | An obsolete rule for an approximate child's dose, obtained by dividing the child's weight in pounds by 150 and multiplying the result by the adult dose. (05 Mar 2000) |
| Clark, Alonzo | <person> U.S pharmacologist, 1807-1887. See: Clark's weight rule. (05 Mar 2000) |
| Clark, Eliot | <person> U.S. Anatomist, 1881-1963. See: Sandison-Clark chamber. (05 Mar 2000) |
| Clark, Leland Jr | <person> U.S. Biochemist, *1918. See: Clark electrode. (05 Mar 2000) |
| Clark, Wallace Jr | <person> U.S. Dermatopathologist, *1924. See: Clark's level. (05 Mar 2000) |
| Clarke cells | Large multipolar cells characteristic of the thoracic nucleus (Clarke's nucleus in lamina VII) of the spinal cord. (05 Mar 2000) |
| Clarke's column | A column of large neurons located in the base of the posterior gray column of the spinal cord, extending from the first thoracic through the second lumbar segment; it gives rise to the dorsal spinocerebellar tract of the same side. Synonym: nucleus thoracicus, Clarke's column, Clarke's nucleus, dorsal nucleus, nucleus dorsalis, Stilling's column, Stilling's nucleus. (05 Mar 2000) |
| Clarke's nucleus | A column of large neurons located in the base of the posterior gray column of the spinal cord, extending from the first thoracic through the second lumbar segment; it gives rise to the dorsal spinocerebellar tract of the same side. Synonym: nucleus thoracicus, Clarke's column, Clarke's nucleus, dorsal nucleus, nucleus dorsalis, Stilling's column, Stilling's nucleus. (05 Mar 2000) |
| Clarke, Jacob | <person> English anatomist, 1817-1880. See: Clarke's column, Clarke's nucleus. (05 Mar 2000) |
| Clarke-Hadfield syndrome | <chest medicine> A generalised disorder of infants, children and young adults, in which there is widespread dysfunction of the exocrine glands, characterised by signs of chronic pulmonary disease (due to excess mucus production in the respiratory tract), pancreatic deficiency, abnormally high levels of electrolytes in the sweat and occasionally by biliary cirrhosis. There is an ineffective immunologic defense against bacteria in the lungs. Pathologically, the pancreas shows obstruction of the pancreatic ducts by amorphous eosinophilic concretions, with consequent deficiency of pancreatic enzymes, resulting in steatorrhoea and azotorrhoea and intestinal malabsorption. The degree of involvement of organs and glandular systems may vary greatly, with consequent variations in the clinical picture. Inheritance: autosomal recessive. (13 Nov 1997) |
| Sandison-Clark chamber | A chamber that can be fitted over a hole punched in a rabbit's ear, so that tissue will grow to fill the defect between two transparent plates; if the distance between the plates is small, the living tissue can be studied microscopically. (05 Mar 2000) |
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Synonyms :
| Clark electrode |
Electrochemical device sensitive to PO2 of oxygen contained in blood.
Ãâó: www.ventworld.com/resources/glossary.asp
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| Clark's rule |
A method of calculating pediatric drug dosages. The weight of the child in pounds is multiplied by the adult dose and the result is divided by 150. SEE: dosage.
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| Clarke's body |
One of the alveolar sarcomatous intranuclear bodies of the breast.
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| Clarke, Jacob A. L. |
British anatomist, 1817?1880.
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| Clark's s. |
a scale used in denoting the hardness of water, based on the number of grains of calcium carbonate per imperial gallon.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Clark | Canadian politician who served as prime minister (1939-) |
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| Clark | United States psychologist (born in Panama) whose research persuaded the Supreme Court that segregated schools were discriminatory (1914-) |
| Clark | United States general who was Allied commander in Africa and Italy in World War II and was commander of the United Nations forces in Korea (1896-1984) |
| Clark | United States explorer who (with Meriwether Lewis) led an expedition from St. Louis to the mouth of the Columbia River |
| Clark | a form of voltaic cell once used as a standard for electromotive force |
| Clark | United States film actor (1901-1960) |
| Clark | a form of voltaic cell once used as a standard for electromotive force |
| Clark | nutcracker of the western United States |
| Clark | a city in northern West Virginia |
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