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Ertl, Gerhard

(Encyclopedia)Ertl, Gerhard gĕrˈhärt ârˈtəl [key], 1936– German chemist, b. Stuttgart, grad. Univ. of Stuttgart (1961), Technical Univ., Munich (Ph.D 1965). After holding a number of lecturer and research p...

Trojan asteroids

(Encyclopedia)Trojan asteroids, asteroids that revolve about the sun in the same orbit as a planet, occupying stable positions (known as Lagrangian points) either about 60° ahead of the planet in the orbit or abou...

X-ray crystallography

(Encyclopedia)X-ray crystallography, the study of crystal structures through X-ray diffraction techniques. When an X-ray beam bombards a crystalline lattice in a given orientation, the beam is scattered in a defini...

Adorno, Theodor Wiesengrund

(Encyclopedia)Adorno, Theodor Wiesengrund tāədôrˌ vēˈzəngro͝ond ädôrˈnō [key], 1903–69, German philosopher, born as Theodor Adorno Wiesengrund. Forced into exile by the Nazis (1933), he spent 16 years...

Asch, Sholem

(Encyclopedia)Asch, Sholem or Shalom shōˈləm ăsh, shäˈləm [key], 1880–1957, Jewish novelist and playwright, b. Poland. He first came to the United States in 1909, was naturalized in 1920, and lived in vari...

Marcuse, Herbert

(Encyclopedia)Marcuse, Herbert märko͞oˈzə [key], 1898–1979, U.S. political philosopher, b. Berlin. He was educated at the Univ. of Freiburg and with Theodore Adorno and Max Horkheimer founded the Frankfurt In...

Hershey, Alfred Day

(Encyclopedia)Hershey, Alfred Day, 1908–1997, American microbiologist, b. Owosso, Mich., Ph.D., Michigan State College (now Michigan State Univ.), 1934. Hershey was a professor at the Washington Univ. School of M...

phenomenology

(Encyclopedia)phenomenology, modern school of philosophy founded by Edmund Husserl. Its influence extended throughout Europe and was particularly important to the early development of existentialism. Husserl attemp...

art history

(Encyclopedia)art history, the study of works of art and architecture. In the mid-19th cent., art history was raised to the status of an academic discipline by the Swiss Jacob Burckhardt, who related art to its cul...

Humphrey, Hubert Horatio

(Encyclopedia)Humphrey, Hubert Horatio, 1911–78, U.S. Vice President (1965–69), b. Wallace, S.Dak. After practicing pharmacy for several years, Humphrey taught political science and became involved in state pol...