(Encyclopedia) protein, any of the group of highly complex organic compounds found in all living cells and comprising the most abundant class of all biological molecules. Protein comprises…
(Encyclopedia)
CE5
The three solid forms of pure carbon: In the diamond crystal each carbon atom is surrounded symmetrically by four other carbons (at each of the four corners of a tetrahedron).…
(Encyclopedia) iron, metallic chemical element; symbol Fe [Lat. ferrum]; at. no. 26; at. wt. 55.845; m.p. about 1,535℃; b.p. about 2,750℃; sp. gr. 7.87 at 20℃; valence +2, +3, +4, or +6. Iron is…
U.S. Department of State Background Note Index: People History Government and Political Conditions Economy Defense U.S.-Cameroonian Relations PEOPLECameroon's estimated 250 ethnic groups form…
U.S. Department of State Background Note Index: People and History Government Political Conditions Economy Foreign Relations Defense U.S.-Ugandan Relations PEOPLE AND HISTORY Africans of three…
(Encyclopedia) vitamin, group of organic substances that are required in the diet of humans and animals for normal growth, maintenance of life, and normal reproduction. Vitamins act as catalysts;…
(Encyclopedia) air pollution, contamination of the air by noxious gases and minute particles of solid and liquid matter (particulates) in concentrations that endanger health. The major sources of air…
U.S. Department of State Background Note Index: Geography People History Government and Political Conditions Economy Defense Foreign Relations U.S.-Angolan Relations GEOGRAPHYAngola is located…
(Encyclopedia) medicine, the science and art of treating and preventing disease.
Modern medicine, characterized by growing specialization and a complex diagnostic and therapeutic technology, faces…
U.S. Department of State Background Note
Index:
Geography People History Government and Political Conditions Defense Economy Foreign Relations U.S.-Chilean Relations
GEOGRAPHY
The…
