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Perrin, Jean Baptiste

(Encyclopedia)Perrin, Jean Baptiste zhäN bätēstˈ pĕrăNˈ [key], 1870–1942, French physicist. From 1910 to 1940 he was professor at the Univ. of Paris, and in 1941 he came to the United States. Perrin specia...

Lawrence Berkeley National Laboratory

(Encyclopedia)Lawrence Berkeley National Laboratory and Lawrence Livermore National Laboratory, scientific research centers run by the Univ. of California, located in Berkeley, Calif., and Livermore, Calif., respec...

nucleus, in physics

(Encyclopedia)nucleus, in physics, the extremely dense central core of an atom. Following the discovery of radioactivity by A. H. Becquerel in 1896, Ernest Rutherford identified two types of radiation given off b...

Lilienthal, David Eli

(Encyclopedia)Lilienthal, David Eli lĭlˈyənthôl [key], 1899–1981, American public official, b. Morton, Ill. He was admitted (1923) to the bar, practiced law, and was appointed by Gov. Philip La Follette to th...

World Intellectual Property Organization

(Encyclopedia)World Intellectual Property Organization (WIPO), specialized agency of the United Nations, with headquarters at Geneva. WIPO became an agency in 1974, but its roots go back to 1883 when the need for i...

Blackett, Patrick Maynard Stuart

(Encyclopedia)Blackett, Patrick Maynard Stuart blăkˈĭt [key], 1897–1974, English physicist. He was professor of physics at the Univ. of Manchester (1937–53) and in 1953 became professor at the Univ. of Londo...

Rickover, Hyman George

(Encyclopedia)Rickover, Hyman George, 1900–1986, American admiral, b. Russia. In World War II he served as head of the electrical section of the navy's Bureau of Ships. After the war he was assigned (1946) to the...

Port Radium

(Encyclopedia)Port Radium, mining village, N central Northwest Territories, Canada, on Great Bear Lake. The mines were discovered in 1930 and yielded deposits of pitchblende, from which much radium was produced. Du...

UNICEF

(Encyclopedia)UNICEF yo͞oˈnĭsĕfˌ [key], the United Nations Children's Fund, an affiliated agency of the United Nations. The term UNICEF is an acronym for the original name of the agency, the United Nations Int...

electron-volt

(Encyclopedia)electron-volt, abbr. eV, unit of energy used in atomic and nuclear physics; 1 electron-volt is the energy transferred in moving a unit charge, positive or negative and equal to that charge on the elec...