biological dating method

生物学定年法

Atmospheric Sciences (English-Chinese) dictionary. 2014.

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  • dating — 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 …   Universalium

  • carbon-14 dating — or radiocarbon dating Method of determining the age of once living material, developed by U.S. physicist Willard Libby in 1947. It depends on the decay of the radioactive isotope carbon 14 (radiocarbon) to nitrogen. All living plants and animals… …   Universalium

  • Radiocarbon 14 dating of the Turin Shroud — Radiocarbon dating of the Turin Shroud was the most famous scientific study performed on the artifact. The radiocarbon dating was carried out in 1988 and dated the cloth is to between 1260 and 1390 C.E., compatible with the first recorded mention …   Wikipedia

  • radiocarbon dating — noun A method of estimating the age of an artifact or biological vestige based on the relative amounts of the different isotopes of carbon present in a sample. Syn: carbon dating …   Wiktionary

  • geochronology — geochronologic /jee oh kron l oj ik/, geochronological, adj. geochronologist, n. /jee oh kreuh nol euh jee/, n. the chronology of the earth, as based on both absolute and relative methods of age determination. [1890 95; GEO + CHRONOLOGY] * * *… …   Universalium

  • Refuse-derived fuel — (RDF) or solid recovered fuel/ specified recovered fuel (SRF) is a fuel produced by shredding municipal solid waste (MSW) or steam pressure treating in an autoclave. RDF consists largely of organic components of municipal waste such as plastics… …   Wikipedia

  • Waste-to-energy — (WtE) or energy from waste (EfW) refers to any waste treatment that creates energy in the form of electricity or heat from a waste source. Such technologies reduce or eliminate waste that otherwise would be transferred to a greenhouse gas… …   Wikipedia

  • Geomagnetic reversal — Magnetic reversal redirects here. For switching of a magnet, see Magnetization reversal. Geomagnetic polarity during the late Cenozoic Era. Dark areas denote periods where the polarity matches today s polarity, light areas denote periods where… …   Wikipedia

  • Archaic Homo sapiens — Dawn men redirects here. For the stone circle, see Dawn s Men. Homo rhodesiensis Broken Hill Cranium : dated to either 130,000 years ago (using amino acid racemization determination) or 800,000 to 600,000 years ago (within the same time as Homo… …   Wikipedia

  • Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

  • Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

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