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Anfinsen, Christian Boehmer

(Encyclopedia)Anfinsen, Christian Boehmer, 1916–95, American biochemist, b. Monessen, Pa., Ph.D. Harvard Medical School, 1943. He spent the early years of his career in brief research and fellowship positions at ...

aquatint

(Encyclopedia)aquatint äˈkwətĭntˌ [key], etching technique. The plate is covered with a porous ground, or resist, through which acid bites many tiny pockmarks in the metal. If an area is to be completely white...

Szent-Gyorgyi, Albert von

(Encyclopedia)Szent-Gyorgyi, Albert von älˈbĕrt fən sĕntˌ-dyörˈdyĭ [key], 1893–1986, American biochemist, b. Hungary, M.D. Univ. of Budapest, 1917; Ph.D. Cambridge, 1927. After teaching at the universiti...

Skou, Jens Christian

(Encyclopedia)Skou, Jens Christian, 1918–2018, Danish chemist, M.D. Univ. of Copenhagen, 1944, Ph.D. Univ. of Aarhus, 1954. Skou was on the faculty at the Univ. of Aarhus, Denmark, from 1947 until he retired in 1...

pectin

(Encyclopedia)pectin, any of a group of white, amorphous, complex carbohydrates that occur in ripe fruits and certain vegetables. Fruits rich in pectin are the peach, apple, currant, and plum. Protopectin, present ...

photoengraving

(Encyclopedia)photoengraving, photomechanical process in the graphic arts, used principally for reproducing illustrations. The subject is photographed, and the image is recorded on a sensitized metal plate, which i...

Nelson, Willie

(Encyclopedia)Nelson, Willie, 1933–, American country singer, guitarist, and songwriter, b. Abbott, Tex. Nelson began playing professionally at 10 and joined a western swing band as a teenager. In the 1960s he mo...

levee

(Encyclopedia)levee lĕvˈē [key] [Fr.,=raised], embankment built along a river to prevent flooding by high water. Levees are the oldest and the most extensively used method of flood control. They are constructed ...

Roraima

(Encyclopedia)Roraima ro͝orīˈmə [key], state (1996 pop. 247,724), 88,843 sq mi (230,103 sq km), NW Brazil, on the border of Venezuela and Guyana. Boa Vista is the capital. Located almost entirely in the Guiana ...

Abidjan

(Encyclopedia)Abidjan ăbĭjänˈ [key], city (2021 est. pop. 27,263,180 ), former capital of Côte d'Ivoire, a port on the Ébrié Lagoon (an arm of the Gulf of Guinea). Abidjan is Cô...