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Karrer, Paul

(Encyclopedia)Karrer, Paul, 1889–1971, Swiss organic chemist, Ph.D. Univ. of Zürich, 1911. From 1912 to 1918, Karrer was a chemist at the Georg Speyer Haus, Frankfurt-am-Main. He left in 1919 to become professor...

Cattell, Raymond Bernard

(Encyclopedia)Cattell, Raymond Bernard kətĕlˈ [key], 1905–98, American psychologist, b. Staffordshire, England. He came to the United States in 1937 and served as research professor at the Univ. of Illinois (1...

Whittingham, Michael Stanley

(Encyclopedia)Whittingham, Michael Stanley, 1941–, British-American chemist, Ph.D. Oxford, 1968. Whittingham worked for Exxon Research & Engineering from 1972 to 1984, then joined Schlumberger Ltd. In 1988, h...

Walker, Sir John Ernest

(Encyclopedia)Walker, Sir John Ernest, 1941–, English biochemist, Ph.D. Oxford, 1969. He has been a researcher at the Medical Research Council Laboratory of Molecular Biology in Cambridge since 1974. In 1997 Walk...

Ružička, Leopold Stephen

(Encyclopedia)Ružička, Leopold Stephen or Lavoslav Stjepan 1887–1976, Swiss chemist, b. Croatia (then in Austria-Hungary), Dr.Ing. Technische Hochschule, Karlsruhe, Germany, 1910. Ružička was a researcher at ...

truss

(Encyclopedia)CE5 A. King post truss B. Queen, with princess posts truss, in architecture and engineering, a supporting structure or framework composed of beams, girders, or rods commonly of steel or wood lying...

Tikal

(Encyclopedia)Tikal tēkälˈ [key], ruined city of the Classic Period of the Maya, N central Petén, Guatemala. The largest and possibly the oldest of the Maya cities, Tikal consists of nine groups of courts and p...

tendril

(Encyclopedia)tendril, slender, sensitive structure of many climbing plants that by a response to contact (see auxin) supports the plant. Tendrils are modified stems, leaves, or leaf parts or roots. Most young tend...

Wrexham

(Encyclopedia)Wrexham rĕkˈsəm [key], Welsh Wrescam, town (1981 pop. 39,929) and county borough, 193 sq mi (499 sq km), NE Wales. It lies in the coal field of N Wales. Wrexham's industries include the manufacture...

breakwater

(Encyclopedia)breakwater, offshore structure to protect a harbor from wave energy or deflect currents. When it also serves as a pier, it is called a quay; when covered by a roadway it is called a mole. In the Unite...