long-lived activity
51Dugong — Dugong[1] Temporal range: Early Eocene–Recent …
52Nuclear fuel cycle — The nuclear fuel cycle, also called nuclear fuel chain, is the progression of nuclear fuel through a series of differing stages. It consists of steps in the front end, which are the preparation of the fuel, steps in the service period in which… …
53Radioactive decay — For particle decay in a more general context, see Particle decay. For more information on hazards of various kinds of radiation from decay, see Ionizing radiation. Radioactive redirects here. For other uses, see Radioactive (disambiguation).… …
54Marxism (Philosophies of) — Philosophies of Marxism Lenin, Lukács, Gramsci, Althusser Michael Kelly INTRODUCTION Marxist philosophy can be seen as a struggle with Hegel or a struggle with capitalism, that is, as an intellectual or a political movement. Neither of these… …
55Thailand — /tuy land , leuhnd/, n. 1. Formerly, Siam. a kingdom in SE Asia: official name of Siam 1939 45 and since 1949. 59,450,818; 198,242 sq. mi. (513,445 sq. km). Cap.: Bangkok. 2. Gulf of. Also called Gulf of Siam. an arm of the South China Sea, S of… …
56Mount Edziza volcanic complex — Mount Edziza, one of the main volcanoes of the Mount Edziza volcanic complex Elevation …
57dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …
58Nuclear transmutation — is the conversion of one chemical element or isotope into another. In other words, atoms of one element can be changed into atoms of other element by transmutation . This occurs either through nuclear reactions (in which an outside particle… …
59Algeria — /al jear ee euh/, n. a republic in NW Africa: formerly comprised 13 departments of France; gained independence 1962. 29,830,370; 919,352 sq. mi. (2,381,122 sq. km). Cap.: Algiers. * * * Algeria Introduction Algeria Background: After a century of… …
60radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
