Columbia Encyclopedia

Search results

473 results found

circuit breaker

(Encyclopedia)circuit breaker, electric device that, like a fuse, interrupts an electric current in a circuit when the current becomes too high. The advantage of a circuit breaker is that it can be reset after it h...

Santa Rosa, city, United States

(Encyclopedia)Santa Rosa sănˈtə rōˈzə [key], city (1990 pop. 113,313), seat of Sonoma co., W Calif.; inc. 1868. It is an industrial city and a retail, financial, and medical center for the fertile Sonoma Vall...

pyroclastic flow

(Encyclopedia)pyroclastic flow, turbulent, fluidized mixture of rock, volcanic ash, and hot gas that moves like an avalanche away from a volcanic eruption. A pyroclastic flow may contain a mix of rock fragments ran...

Spillane, Mickey

(Encyclopedia)Spillane, Mickey (Frank Morrison Spillane), 1918–2006, American mystery writer, b. Brooklyn, N.Y. After contributing stories to comic books and pulp magazines, Spillane wrote his first novel, I, the...

Lefkowitz, Robert Joseph

(Encyclopedia)Lefkowitz, Robert Joseph, 1943–, American physician, b. New York City, M.D. Columbia, 1966. Since 1973 Lefkowitz has been a professor at Duke Univ.; he was appointed a Howard Hughes Medical Institut...

MacKinnon, Roderick

(Encyclopedia)MacKinnon, Roderick, 1956–, American biochemist, b. Burlington, Mass., M.D. Tufts Univ., 1982. MacKinnon was on the faculty at Harvard Medical School from 1989–96 and has been a professor at the H...

Parrish, Maxfield

(Encyclopedia)Parrish, Maxfield, 1870–1966, American painter and illustrator, b. Philadelphia; pupil of Howard Pyle. He is known for his original and highly decorative posters, magazine covers, and book illustrat...

Cech, Thomas Robert

(Encyclopedia)Cech, Thomas Robert chĕk [key], 1947–, American microbiologist, b. Chicago, grad. Univ. of California, Berkeley. A professor at the Univ. of Colorado, he discovered that RNA could function as enzym...

Schekman, Randy Wayne

(Encyclopedia)Schekman, Randy Wayne, 1948–, American cell biologist, b. St. Paul, Minn. Ph.D. Stanford, 1974. He is a professor (since 1976) at the Univ. of California, Berkeley, and an investigator of the Howard...

Washington, Walter Edward

(Encyclopedia)Washington, Walter Edward, 1915–2003, American political figure, first African-American mayor of Washington, D.C. (1975–79) and of a major American city, b. Dawson, Ga., grad. Howard Univ. (A.B., ...