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Nagin, Ray

(Encyclopedia)Nagin, Ray (Clarence Ray Nagin, Jr.), 1956–, African-American politician, b. New Orleans. A Louisiana cable-television executive before entering politics, Nagin won the 2002 mayoral election handily...

Robinson, Boardman

(Encyclopedia)Robinson, Boardman, 1876–1952, American painter, illustrator, and cartoonist, b. Somerset, N.S., studied at the Massachusetts School of Art, Boston, and in Paris. After four years of painting in San...

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...

beet sugar

(Encyclopedia)beet sugar: see beet; sucrose. ...

X-ray astronomy

(Encyclopedia)X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that the sun emits X ...

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