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Lynen, Feodor

(Encyclopedia)Lynen, Feodor fāōˈdôr lēˈnən [key], 1911–79, German biochemist, grad. Univ. of Munich (Ph.D. 1937). He began teaching at the Max Planck Institute for Cell Chemistry in Munich in 1947. His res...

mechanism

(Encyclopedia)mechanism, philosophical theory about the nature of organic systems, holding that organisms are machines in the sense that they are material systems. Mechanism seeks to explain biological processes, i...

Wieland, Heinrich

(Encyclopedia)Wieland, Heinrich, 1877–1957, German chemist, Ph.D. Univ. of Munich, 1901. Wieland was a professor at the Technical Univ. of Munich from 1913 to 1921, the Univ. of Freiburg from 1921 to 1925, and th...

Polanyi, John Charles

(Encyclopedia)Polanyi, John Charles, 1929–, Canadian chemist. Raised and educated in England, he worked as a researcher in Canada before taking a teaching position at the Univ. of Toronto in 1956. He used spectro...

San Marcos, University of

(Encyclopedia)San Marcos, University of, at Lima, Peru; the first university in South America; founded 1551 by the Spanish king Charles I (Holy Roman Emperor Charles V) and recognized by papal bull in 1571; closed ...

Proust, Joseph Louis

(Encyclopedia)Proust, Joseph Louis zhôzĕfˈ lwē pro͞ost [key], 1754–1826, French chemist. He was professor of chemistry at the artillery school in Segovia, Spain, and director of the laboratory of Charles IV ...

compound

(Encyclopedia)compound, in chemistry, a substance composed of atoms of two or more elements in chemical combination, occurring in a fixed, definite proportion and arranged in a fixed, definite structure. A compound...

lawrencium

(Encyclopedia)lawrencium, artificially produced radioactive chemical element; symbol Lr; at. no. 103; mass number of most stable isotope 262; m.p. about 1,627℃; b.p. and sp. gr. unknown; valence +3. Lawrencium is...

phosphoric acid

(Encyclopedia)phosphoric acid, any one of three chemical compounds made up of phosphorus, oxygen, and hydrogen (see acids and bases). The most common, orthophosphoric acid, H3PO4, is usually simply called phosphori...

Clark, William Smith

(Encyclopedia)Clark, William Smith, 1826–86, American educator, b. Ashfield, Mass., grad. Amherst, 1848, and studied chemistry and botany at Göttingen (Ph.D., 1852). He taught at Amherst until the Civil War, fou...