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Langmuir, Irving

(Encyclopedia)Langmuir, Irving lăngˈmyo͞or [key], 1881–1957, American chemist, b. Brooklyn, N.Y. Associated (1909–50) with the research laboratory of the General Electric Company, he introduced atomic-hydrog...

Robeson, Paul

(Encyclopedia)Robeson, Paul rōbˈsən [key], 1898–1976, American actor and bass singer, b. Princeton, N.J. The son of a runaway slave who became a minister, Robeson graduated first from Rutgers (1919), where he ...

Elizabeth, city, United States

(Encyclopedia)Elizabeth, city (2020 pop. 137,298), seat of Union co., NE N.J., on Newark Bay; inc. 1855. It is a shipping and transportation hub, with some of the wor...

Habré, Hissène

(Encyclopedia)Habré, Hissène hēsĕnˈ häbrāˈ [key], 1942–, Chadian political leader, president of Chad (1982–90). He studied political science in Paris during the late 1960s and, returning to Chad (1970),...

Sweeney, John Joseph

(Encyclopedia)Sweeney, John Joseph, 1934–2021, U.S. labor leader, b. New York City. An official of the Service Employees Internation...

Council of Europe

(Encyclopedia)Council of Europe, international organization founded in 1949 to promote greater unity within Europe and to safeguard its political and cultural heritage by promoting human rights and democracy. The c...

silica

(Encyclopedia)silica or silicon dioxide, chemical compound, SiO2. It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid. Pure silica is colorless to white. It occurs in sev...

Laurent, Auguste

(Encyclopedia)Laurent, Auguste ōgüstˈ lōräNˈ [key], 1808–53, French organic chemist. He devised a systematic nomenclature for organic chemistry. His studies on naphthalene and its chlorination products led ...

du Vigneaud, Vincent

(Encyclopedia)du Vigneaud, Vincent dyo͞o vēnˈyō [key], 1901–78, American biochemist, b. Chicago. He was professor of biochemistry and head of the department at George Washington Univ. school of medicine (1932...

Harden, Sir Arthur

(Encyclopedia)Harden, Sir Arthur, 1865–1940, British biochemist, Ph.D. Univ. of Erlangen, 1888. Harden was a lecturer at the Univ. of Manchester (1888–1897) before becoming a researcher (1897–1930) at the Bri...