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water wheel, device

(Encyclopedia)water wheel, device for utilizing the power of flowing or falling water. The Norse wheel is the oldest type known. Despite its name it probably originated in the Middle East, where the swift stream re...

National Institutes of Health

(Encyclopedia)National Institutes of Health (NIH), agency of the U.S. Public Health Service, with headquarters in Bethesda, Md. It was established initially in 1887 as a laboratory in the U.S. Marine Hospital on St...

Kornberg, Roger David

(Encyclopedia)Kornberg, Roger David, 1947–, American biochemist, b. St. Louis, Mo., Ph.D. Stanford, 1972; son of Arthur Kornberg. Kornberg held academic posts at Cambridge (1972–76) and Harvard (1976–78) befo...

Ikeda, Hayato

(Encyclopedia)Ikeda, Hayato häyäˈtō ēkāˈdä [key], 1899–1965, Japanese political leader, prime minister (1960–64). After serving as an official in the finance ministry (1925–48) he entered politics, ga...

Duarte, José Napoleón

(Encyclopedia)Duarte, José Napoleón dwärˈtā [key], 1925–90, president of El Salvador (1980–82, 1984–89). A Christian Democrat, he was mayor of San Salvador (1964–70). In 1972, Duarte was elected presid...

Ehrlich, Paul

(Encyclopedia)Ehrlich, Paul poul ārˈlĭkh [key], 1854–1915, German bacteriologist. He directed (1896) an institute for serum research at Steglitz, near Berlin, that was transferred (1899) to Frankfurt-am-Main a...

Smith, Michael

(Encyclopedia)Smith, Michael, 1932–2000, British-born Canadian biochemist, Ph.D. Univ. of Manchester, 1956. Smith was a researcher at the Univ. of British Columbia from 1961 until his death in 2000. He shared the...

Rous, Francis Peyton

(Encyclopedia)Rous, Francis Peyton, 1879–1970, American pathologist, b. Baltimore, educated at Johns Hopkins (B.A., 1900; M.D., 1905). He taught (1906–8) pathology at the Univ. of Michigan and in 1909 joined th...

polybrominated biphenyl

(Encyclopedia)polybrominated biphenyl or PBB, any of a group of organic compounds used as a fire retardant. In 1973 several thousand pounds of PBB were accidentally mixed with livestock feed that was later distribu...

liposome

(Encyclopedia)liposome līˈpəsōmˌ, lĭpˈə– [key], microscopic, fluid-filled pouch whose walls are made of layers of phospholipids identical to the phospholipids that make up cell membranes. Liposomes are us...