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Tenochtitlán

(Encyclopedia)Tenochtitlán tānōchtētlänˈ [key], ancient city in the central valley of Mexico. The capital of the Aztec, it was founded (c.a.d. 1345) on a marshy island in Lake Texcoco. It was a flourishing ci...

East Saint Louis

(Encyclopedia)East Saint Louis lo͞oˈĭs [key], city (2020 pop. 25,377), St. Clair co., SW Ill., on the Mississippi ...

sphinx

(Encyclopedia)sphinx sfĭngks [key], mythical beast of ancient Egypt, frequently symbolizing the pharaoh as an incarnation of the sun god Ra. The sphinx was represented in sculpture usually in a recumbent position ...

Shechtman, Daniel S.

(Encyclopedia)Shechtman, Daniel S., 1941–, Israeli materials scientist, Ph.D. Technion (Israel Institute of Technology), 1972. Shechtman, who joined the faculty at Technion in 1975, received the Nobel Prize in Ch...

Holley, Robert William

(Encyclopedia)Holley, Robert William, 1922–93, American biochemist, b. Urbana, Ill., Ph.D. Cornell, 1947. He was a professor at Cornell (1948–68) before he joined (1968) the Salk Institute, and he continued an ...

syncopation

(Encyclopedia)syncopation sĭngˌkəpāˈshən, sĭnˌ– [key] [New Gr.,=cut off ], in music, the accentuation of a beat that normally would be weak according to the rhythmic division of the measure. Although th...

denaturation

(Encyclopedia)denaturation, term used to describe the loss of native, higher-order structure of protein molecules in solution. Most globular proteins exhibit complicated three-dimensional folding described as secon...

diet, in nutrition

(Encyclopedia)diet, food and drink regularly consumed for nourishment. Nutritionists generally recommend eating a wide variety of foods; however, some groups of people survive on a very limited diet. The traditiona...

Great Basin

(Encyclopedia)Great Basin, semiarid, N section of the Basin and Range province, the intermontane plateau region of W United States and N Mexico. Lying mostly in Nevada and extending into California, Oregon, Idaho, ...

sodium sulfate

(Encyclopedia)sodium sulfate, chemical compound, Na2SO4. It is a white, orthorhombic crystalline compound at ordinary temperatures; above 100℃ it assumes a monoclinic structure, and above about 250℃ it assumes ...