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hassium

(Encyclopedia)hassium hăsˈēəm, häsˈ– [key], artificially produced radioactive chemical element; symbol Hs; at. no. 108; mass number of most stable isotope 277; m.p., b.p., sp. gr., and valence unknown. Situ...

ether, in chemistry

(Encyclopedia)CE5 Ethers ether, any of a number of organic compounds whose molecules contain two hydrocarbon groups joined by single bonds to an oxygen atom. The most common of these compounds is ethyl ether, C...

antiseptic

(Encyclopedia)antiseptic, agent that kills or inhibits the growth of microorganisms on the external surfaces of the body. Antiseptics should generally be distinguished from drugs such as antibiotics that destroy mi...

Von Neumann, John

(Encyclopedia)Von Neumann, John noiˈmän [key], 1903–57, American mathematician, b. Hungary, Ph.D. Univ. of Budapest, 1926. He came to the United States in 1930 and was naturalized in 1937. He taught (1930–33)...

white lead

(Encyclopedia)white lead, heavy, white substance, poisonous, insoluble in water, extensively used as a white pigment and base in paints. It is one of the oldest paint pigments used by humans. Chemically, it is basi...

Minsk

(Encyclopedia)Minsk mĭnsk, Rus. mēnsk [key], city (1990 est. pop. 1,610,000), capital of Belarus and of the Minsk region, on a tributary of the Berezina. It is a railroad junction with machine, machine-tool, trac...

Penn, Irving

(Encyclopedia)Penn, Irving, 1917–2009, American photographer, elder brother of Arthur Penn, b. Plainfield, N.J.; studied Philadelphia Museum School of Industrial Art (now University of the Arts, 1934–38). Origi...

Kertész, Imre

(Encyclopedia)Kertész, Imre kĕrtĕshˈ [key], 1929–2016, Hungarian novelist, b. Budapest. Of Jewish descent, as a teenager Kertész spent two years in the Auschwitz and Buchenwald concentration camps, experien...

Wallenberg, Raoul

(Encyclopedia)Wallenberg, Raoul räo͞olˈ vălˈĕnbâr [key] 1912–47, Swedish diplomat and businessman. In 1944, he was assigned to Sweden's legation in Budapest, where he helped save approximately 100,000 Hung...

Wuhan

(Encyclopedia)Wuhan wo͞o-hän [key], city (1994 est. pop. 3,519,600), capital of Hubei prov., central China, at the junction of the Han and Chang rivers. The great industrial, commercial, and transportation center...