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demography

(Encyclopedia) demographydemographydĭmŏgˈrəfē [key], science of human population. Demography represents a fundamental approach to the understanding of human society. Its primary tasks are to…

Didache

(Encyclopedia) DidacheDidachedĭdˈəkē [key] [Gr.,=teaching], early Christian work written in Greek, called also The Teaching of the Twelve Apostles. Dates for its composition suggested by scholars…

Ceiba, La

(Encyclopedia) Ceiba, LaCeiba, Lalä sāˈbä [key], city (1997 est. pop. 96,000), N Honduras, capital of Atlántida dept., on the Caribbean Sea. It is the commercial and processing center of a rich…

Wald, George

(Encyclopedia) Wald, George, 1906–97, American biochemist, b. New York City, Ph.D. Columbia, 1932. He spent most of his career on the faculty at Harvard. In 1967 Wald, Haldan K. Hartline, and Ragnar…

tularemia

(Encyclopedia) tularemiatularemiat&oomacr;lərēˈmēə [key] or rabbit fever, acute, infectious disease caused by Francisella tularensis (Pasteurella tularensis). The greatest incidence is among…

amino group

(Encyclopedia) amino group, in chemistry, functional group that consists of a nitrogen atom attached by single bonds to hydrogen atoms, alkyl groups, aryl groups, or a combination of these three. An…

Sheldon, Edward Austin

(Encyclopedia) Sheldon, Edward Austin, 1823–97, American educator, b. Wyoming co., N.Y., studied at Hamilton College. After illness forced him to cut short his own education, he held a variety of…

Erasistratus

(Encyclopedia) ErasistratusErasistratusĕrəsĭsˈtrətəs [key], fl. 3d cent. b.c., Greek physician, b. Chios. He was the leader of a school of medicine in Alexandria, and his works were influential until…

Granit, Ragnar

(Encyclopedia) Granit, Ragnar, 1900–1991, Swedish physiologist, M.D., Univ. of Helsinki, 1927. A professor at the Univ. of Helsinki from 1927, he joined the faculty of the Karolinska Institute,…

Mars, in Roman religion and mythology

(Encyclopedia) Mars, in Roman religion and mythology, god of war. In early Roman times he was a god of agriculture, but in later religion (when he was identified with the Greek Ares) he was primarily…