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Régnier, Henri de

(Encyclopedia)Régnier, Henri de äNrēˈ də rānyāˈ [key], 1864–1936, French poet, one of the young symbolists of the circle of Mallarmé. His early Poèmes anciens et romanesques (1891) showed skill in free ...

Ossietzky, Carl von

(Encyclopedia)Ossietzky, Carl von fən ôsyĕtˈskē [key], 1889–1938, German pacifist. A leader of the peace movement in Germany after World War I, he was editor of the antimilitarist weekly Weltbühne from 1927...

Witelo of Silesia

(Encyclopedia)Witelo of Silesia or Vitelo, c.1230–75, Silesian physicist, philosopher, and theologian. He studied in Paris and Padua and spent time at the papal palace in Viterbo, Italy. His ten-volume work on op...

Karle, Jerome

(Encyclopedia)Karle, Jerome kärl [key], 1918–2013, American physicist, b. New York City, Ph.D. Univ. of Michigan, 1943. He worked on the Manhattan Project before beginning a career (1946–2009) at the U.S. Nava...

Delbrück, Max Ludwig Henning

(Encyclopedia)Delbrück, Max Ludwig Henning dĕlˈbrük [key], 1906–1981, American biophysicist, b. Berlin, Germany. Ph.D, Univ. of Göttingen, 1930. He spent most of his career as a professor at the California I...

sociobiology

(Encyclopedia)sociobiology, controversial field that studies how natural selection, previously used only to explain the evolution of physical characteristics, shapes behavior in animals and humans. The theory has c...

silicone

(Encyclopedia)silicone, polymer in which atoms of silicon and oxygen alternate in a chain; various organic radicals, such as the methyl group, CH3, are bound to the silicon atoms. Silicones, which are unusually sta...

pH

(Encyclopedia)pH, range of numbers expressing the relative acidity or alkalinity of a solution. In general, pH values range from 0 to 14. The pH of a neutral solution, i.e., one which is neither acidic nor alkaline...

Sanger, Frederick

(Encyclopedia)Sanger, Frederick săngˈər [key], 1918–2013, British biochemist, grad. Cambridge (B.A., 1939; Ph.D., 1943). He continued his research at Cambridge after 1943. He won the 1958 Nobel Prize in Chemis...

biophysics

(Encyclopedia)biophysics, application of various methods and principles of physical science to the study of biological problems. In physiological biophysics physical mechanisms have been used to explain such biolog...