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stereochemistry

(Encyclopedia)stereochemistry, study of the three-dimensional configuration of the atoms that make up a molecule and the ways in which this arrangement affects the physical and chemical properties of the molecule. ...

Zewail, Ahmed Hassan

(Encyclopedia)Zewail, Ahmed Hassan, 1946–2016, Egyptian-American chemist, b. Damanhur, Egypt, Ph.D. Univ. of Pennsylvania, 1974. He became a U.S. citizen in 1982. A professor at the California Institute of Techno...

cross-laminated timber

(Encyclopedia)cross-laminated timber (CLT), manufactured wood panels that consist of layers of boards glued together under pressure with the grain of the boards in one layer running perpendicular to the grain in ad...

Feringa, Bernard Lucas

(Encyclopedia)Feringa, Bernard Lucas, 1951–, Dutch organic chemist, Ph.D. Univ. of Groningen, Netherlands, 1978. He has been on the faculty at the Univ. of Groningen since 1984. Feringa was jointly awarded the 20...

Rothstein, Arnold

(Encyclopedia)Rothstein, Arnold rôthˈstēn [key], 1883–1928, American gambler, b. New York City. Supposedly beginning his career at the age of 12, Rothstein became a professional gambler and operated gaming hou...

Chain, Ernst Boris

(Encyclopedia)Chain, Ernst Boris, 1906–79, English biochemist, b. Berlin, Germany. In 1933 he left Germany and went to England, where he conducted research at Cambridge from 1933 to 1935 and at Oxford from 1935; ...

Onsager, Lars

(Encyclopedia)Onsager, Lars, 1903–76, American physical chemist, b. Oslo, Ph.D. Yale, 1935. Onsager taught at Brown Univ. from 1928 to 1933 and was on the faculty at Yale from 1933 until his retirement in 1972. H...

Köthen

(Encyclopedia)Köthen köˈtən [key], city (1994 pop. 31,860), Saxony-Anhalt, central Germany. Köthen has lignite mines, sugar refineries, textile mills, chemical factories, and heavy engineering industries. The ...

isomorphism

(Encyclopedia)isomorphism īˌsəmôrˈfĭzəm [key], of minerals, similarity of crystal structure between two or more distinct substances. Sodium nitrate and calcium sulfate are isomorphous, as are the sulfates of...

flame

(Encyclopedia)flame, phenomenon associated with the chemical reaction of a gas that has been heated above its kindling temperature with some other gas, usually atmospheric oxygen (see combustion). The heat and ligh...