Angebote zu "Isotope" (7 Treffer)

Isotope Methods For Dating Old Groundwater
78,00 € *
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Titel: Isotope Methods For Dating Old GroundwaterVerlag: Intl Atomic Energy Agency,Jahr: 2013.Katalog: 0Ng01 *.*357 SeitenHardcover/Pappeinband

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Stand: 12.10.2017
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Isotope Methods for Dating Old Groundwater
78,00 € *
zzgl. 4,00 € Versand

Titel: Isotope Methods for Dating Old GroundwaterVerlag: Intl Atomic Energy Agency,Jahr: 2013.Katalog: 0Ng01 *.*357 Seiten 357 Seiten 357 SeitenHardcover/Pappeinband

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Stand: 12.10.2017
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Clays in Crustal Environments als Buch von Samb...
117,49 € *
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(117,49 € / in stock)

Clays in Crustal Environments:Isotope Dating and Tracing. Softcover reprint of the original 1st ed. 1995. Sambhu Chaudhuri, Norbert Clauer

Anbieter: Hugendubel.de
Stand: 19.10.2017
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Les problèmes de datation dans la grotte Chauve...
5,49 € *
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Cet ouvrage rapporte l'essentiel des recherches archéologiques qui ont été conduites en vue de la connaissance de l'âge de l'art pariétal de la grotte Chauvet et de l'art mobilier de quelques grottes du sud de l'Allemagne. Il révèle des observations qui n'ont pas été diffusées au public parce qu'elles ne correspondent pas au sensationnel qui est la source des succès médiatiques. Les conséquences sur la connaissance de la chronologie sont surprenantes; la grotte Chauvet ne possède pas les plus anciens chefs d'oeuvre de l'art pariétal, les figurines du Jura souabe ne datent pas de l'Aurignacien. Grottes : Chauvet, Cosquer ; Geissenklosterle, Hohle Fels, Hohlenstein Stadel, Vogelherd ; Candamo, Tito Bustillo. Sites de plein air : Cöa, Sungir. 60 illustrations. Guy Jouve examine selon des critères scientifiques la datation de l'art de la préhistoire et s'intéresse à la déontologie de la recherche. Publications: Utilisation des isotopes stables pour identifier l'origine du charbon de bois du Paléolithique, dans L'Anthropologie 117 (2012). Avec Jean Combier : Chauvet cave's art is not Aurignacian: a new examination of the archaeological evidence and dating procedures. dans Quartär 59 (2012). Nouvelles recherches sur l'identité culturelle et stylistique de la grotte Chauvet et sur sa datation par la méthode du 14C dans L'Anthropologie 118 (2014).

Anbieter: ciando eBooks
Stand: 11.07.2017
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Fossil Horses of South America - Phylogeny, Sys...
91,62 € *
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This book provides an update on the phylogeny, systematics and ecology of horses in South America based on data provided over the past three decades. The contemporary South American mammalian communities were shaped by the emergence of the Isthmus of Panama and by the profound climatic oscillations during the Pleistocene. Horses were a conspicuous group of immigrant mammals from North America that arrived in South America during the Pleistocene. This group is represented by 2 genera, Hippidion and Equus, which include small species (Hippidion devillei, H. saldiasi, E. andium and E. insulatus) and large forms (Equus neogeus and H. principale). Both groups arrived in South America via 2 different routes. One model designed to explain this migration indicates that the small forms used the Andes corridor, while larger horses used the eastern route and arrived through some coastal areas. Molecular dating (ancient DNA) suggests that the South American horses separated from the North American taxa (caballines and the New World stilt-legged horse) after 3.6 - 3.2 Ma, consistent with the final formation of the Panamanian Isthmus. Recent studies of stable isotopes in these horses indicate an extensive range of ?13C values cover closed woodlands to C4 grasslands. This plasticity agrees with the hypothesis that generalist species and open biome specialist species from North America indicate a positive migration through South America. Professor Prado is internationally known for his contributions to the study of fossil horses and paleobiology in South America. He has published over 140 articles in leading international journals, including Nature, Science, PNAS, BMC ecology and Evolutionary Ecology. Prof. Prado. He has also extensive experience managing large research grants. He is frequently invited to present his research at international conferences. His research has made substantial contributions to our understanding of horse evolution, particularly in relation to diversification and extinction processes. Dr. Alberdi is an internationally respected paleontologist who has extensive experience in South America. She currently works at the National Museum of Natural Sciences (CSIC) in Spain, where she was a Vice-Director and also head of the Paleontology department. She is active at the Natural Resources Scientific Committee and is a reviewer for a number of leading paleontology and vertebrates journals.

Anbieter: ciando eBooks
Stand: 11.07.2017
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Radon: A Tracer for Geological, Geophysical and...
178,49 € *
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This book reviews all the major research accomplishments and summarizes the different applications of radon. It serves as a solid reference book for researchers who are interested in the U-series radionuclides and noble gases as tracers and chronometers. Radon has been widely utilized as a powerful tracer to quantify a number of processes that include gas exchange rates between air and water, submarine groundwater discharge in coastal waters, water exchange between rivers and lakes, ocean circulation, hydrocarbon and uranium exploration. It is also used as an atmospheric tracer for the identification and quantification of air masses and as a tool for earthquake prediction, etc. A significant portion of the book presents state-of-the knowledge on indoor-radon-related health issues. Applications of the decay-series of Rn-222 are presented in a chapter. It serves as a reference and a state-of-the-art resource for researchers who want to learn the different applications of radon in Earth systems. Dr. Mark Baskaran is a tenured Full Professor in the Department of Geology at Wayne State University (Detroit, Michigan). He received his Ph.D. in Physics from Physical Research Laboratory (PRL), a premier research institution in India. After his Ph.D., he spent 2 years at PRL as a postdoctoral fellow before he moved to the Institute of Marine Science at the University of Alaska (Fairbanks, Alaska). After a year, he joined Texas A&M University (Galveston, Texas) where he taught introductory Physics and Geology courses at the Department of Marine Sciences, while conducting research related to atmospheric fluxes of radionuclides, mobility of radionuclides in groundwater, scavenging and particle cycling in marine environment and dating of recent sediments and carbonates. After his eleven year career as a teacher and researcher in Texas, he joined Wayne State University where he became a tenured Full Professor in 2007. He teaches both introductory level courses in Oceanography, Meteorology, and Physical Geology as well as upper level courses including Chemical Fate and Transport in the Environment, Nuclear Geology and Environmental Geochemistry. Prof. Mark Baskaran has published over 130 peer-reviewed articles (with over 5,100 Google Scholar cumulative citations, h-index 43 in February 2016), most of which are related to the applications of isotopes as tracers and chronometers in Earth systems. He edited a two-volume Handbook entitled Handbook of Environmental Isotope Geochemistry with forty articles contributed by eminent scholars in the field in 2011, published by Springer. He spent three months as a Senior Fulbright Scholar at Ege University (Izmir, Turkey) in 2015. He has given invited and plenary talks/seminars at over sixty national/international conferences, workshops, universities and research institutions around the world. Dr. Baskarans research work includes all subsystems of the Earth system. Most of his work involved collaboration with a large number of researchers from universities and institutions around the world. His work with marine systems (estuarine, coastal, shelf and open-ocean) on the investigations of particular organic carbon export, particle cycling and remineralization and colloidal thorium scavenging in the Arctic Ocean, Gulf of Mexico, North Atlantic and East Pacific were funded by several funding agencies in the U.S. that include the National Science Foundation (NSF), National Oceanic and Atmospheric Administration (NOAA), and the Department of Energy (DOE). His currently funded ongoing research is to investigate sedimentation and sediment dynamics in dams and other freshwater systems. He has been funded by NSF as a part of the U.S. GEOTRACES group in all four phases (Intercalibration, North Atlantic, East Pacific and Western Arctic Ocean sections). He has served as a Chief Scientist in six major oceanographic expeditions in the Gulf of Mexico and Arctic Ocean. He convened a National Workshop entitled Recent Changes in the Biogeochemistry of the Great Lakes System in March 2013 at Wayne State University. He also had convened a number of sessions and meetings at both national and international conferences and workshops.

Anbieter: ciando eBooks
Stand: 11.07.2017
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Datierung (Archäologie)
16,33 € *
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Quelle: Wikipedia. Seiten: 42. Kapitel: Radiometrische Datierung, Geologische Zeitskala, Radiokohlenstoffdatierung, Altersbestimmung, Dendrochronologie, Stratigraphie, Uran-Blei-Datierung, Isochronenmethode, Kalium-Argon-Datierung, Thermolumineszenz, Palynologie, Blytt-Sernander-Sequenz, Assyrische Königsliste, Before Present, Strontiumisotopenanalyse, Pollenzone, Eponymenliste, Fission Track Dating, Warvenchronologie, Seriation, Belfast-Chronologie, Polaritätsereignis, Lesekeramik, Polaritätsexkursion, Münzdatierung, Fundkombination, Synchronistische Königsliste, Lichenometrie, Aegean Dendrochronology Project, Relative Chronologie, Laschamp-Ereignis, Aminosäuredatierung, Buntkeramik, Absolute Chronologie, Schlussmünze, Uran-Thorium-Datierung, Pee Dee Belemnite. Auszug: Die Radiokohlenstoffdatierung, auch C-Datierung, C14-Datierung/ -methode, lat. Radiokarbonmethode oder als Anglizismus Radiocarbon-Datierung (englisch Kohlenstoff ), ist ein Verfahren zur radiometrischen Datierung von kohlenstoffhaltigen, insbesondere organischen Materialien. Der zeitliche Anwendungsbereich liegt zwischen 300 und etwa 60.000 Jahren. Das Verfahren beruht darauf, dass in abgestorbenen Organismen die Menge an gebundenen radioaktiven C-Atomen gemäß dem Zerfallsgesetz abnimmt. Die Radiokohlenstoffdatierung wird in der archäologischen Altersbestimmung, Archäobotanik und Quartärforschung angewandt. Entwickelt wurde die Radiokohlenstoffdatierung 1946 von Willard Frank Libby (1908 1980), der für diese Leistung 1960 mit dem Nobelpreis für Chemie ausgezeichnet wurde. Kohlenstoffkreislauf von CIn der Natur kommen drei Isotope des Kohlenstoffs vor: C, C, C. Isotopenuntersuchungen zeigen, dass der Anteil am Gesamtkohlenstoffgehalt in der Luft für C etwa 98,89 %, für C etwa 1,11 % und für C 0,000.000.000.1 % (=10 %) beträgt. Auf 10 (1 Billion) C-Kerne kommt so statistisch nur ein einziger C-Kern. Im Gegensatz zu C und C ist C nicht stabil und wird deswegen auch Radiokohlenstoff genannt. C wird ständig durch Kernreaktionen in der oberen Schicht der Erdatmosphäre neu gebildet. Wenn die kosmische Strahlung auf Atome der Atmosphäre trifft, werden durch Spallation Neutronen freigesetzt. Trifft ein solches einen Kern des Stickstoff-Isotops N, so kann die Kernreaktion N(n,p)C erfolgen, in der dieses Neutron eingefangen und dafür ein Proton abgespalten wird. Dadurch entsteht aus dem N-Kern ein C-Kern: Während C und C stabil sind, zerfällt C mit einer Halbwertszeit von 5730 ± 40 Jahren (sog. ´´Cambridge-Halbwertszeit´´) durch ß-Zerfall zu N, einem Elektron und einem Antineutrino: Zwischen ständiger Neubildung und ständigem Zerfall bildet sich ein ungefähres Gleichgewicht aus; die Schwankungen im Anteil der C-Kerne am Kohlenstoff in der Atmosphäre werden weiter unten im Absc

Anbieter: buecher.de
Stand: 18.09.2017
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