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Komatsu

(Encyclopedia)Komatsu kōmäˈtso͞o [key], city (1990 pop. 106,075), Ishikawa prefecture, central Honshu, Japan. It is a flourishing market town noted for its copper mining and the production of silk, rayon, and c...

chloride

(Encyclopedia)chloride klōrˈīd, klôrˈ– [key], chemical compound containing chlorine. Most chlorides are salts that are formed either by direct union of chlorine with a metal or by reaction of hydrochloric ac...

ozone

(Encyclopedia)ozone ōˈzōn [key], an allotropic form of the chemical element oxygen (see allotropy). Pure ozone is an unstable, faintly bluish gas with a characteristic fresh, penetrating odor. The gas has a dens...

Levitt, Michael

(Encyclopedia)Levitt, Michael, 1947–, British-Israeli-American biophysicist, b. South Africa, Ph.D. Cambridge, 1971. Levitt was a faculty member at Cambridge from 1974 to 1979 and at the Weizmann Institute in Isr...

Karplus, Martin

(Encyclopedia)Karplus, Martin, 1930–, Austrian-American theoretical chemist, b. Vienna, Ph.D. California Institute of Technology, 1953. He has been a professor at Harvard since 1967, studying the electronic struc...

Warshel, Arieh

(Encyclopedia)Warshel, Arieh, 1940–, Israeli-American chemist, b. Kibbutz Sde Nahum (in what is now Israel), Ph.D. Weizmann Institute, 1969. He has been a professor at the Univ. of Southern California since 1976....

atomic mass

(Encyclopedia)atomic mass, the mass of a single atom, usually expressed in atomic mass units (amu). Most of the mass of an atom is concentrated in the protons and neutrons contained in the nucleus. Each proton or n...

Höchst

(Encyclopedia)Höchst hökhst [key], industrial district of Frankfurt, in Hesse, central Germany. It is a leading center of the German chemical industry and was formerly the site of the I. G. Farben chemical and dy...

insecticides

(Encyclopedia)insecticides, chemical, biological, or other agents used to destroy insect pests; the term commonly refers to chemical agents only. The liabilities of chemical insecticides have encouraged interest ...

sulfur

(Encyclopedia)CE5 Sulfur crystals sulfur or sulphur sŭlˈfər [key], nonmetallic chemical element; symbol S; at. no. 16; interval in which at. wt. ranges 32.059–32.076; m.p. 112.8℃ (rhombic), 119.0℃ (mon...