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  • Journal of Computational Chemistry

    Journal of Computational Chemistry Volume 21, Number 2, January 30, 2000 Konrad Hinsen The molecular modeling toolkit: a new approach to molecular simulations . . . 7985 Nicolas Foloppe and Alexander D. MacKerell, Jr. Allatom empirical force field for nucleic acids: I. Parameter optimization based on small molecule and condensed phase ...

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  • (PDF) Rare earths in barites: distribution and effects on ...

    Gmchimicu a Acra Vol. 43. pp. 983 to 997 !79,JO7010983102X0/0 0Pergamon Press Ltd. in GreatBritain Rare earths in barites: distribution and effects on aqueous partitioning FRANCOISGUICHARD* Laboratoire CEACNRS, Centre des Faibles RadioactivitCs, 91190 Gif/Yvette, France THOMASM.

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  • Geochemical Characteristics of Apatite in Heavy REE‐rich ...

    Jan 21, 2014· Sample preparation. A sample of the REY mud from the Minami‐Torishima area was collected by Japan Oil, Gas and Metals National Corporation (JOGMEC, Tokyo, Japan) (Fig. 1).We separated 15 fractions (∼50 g/fraction) from a ∼3 kg sample for mineralogical and geochemical investigations (f1–f15).

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  • Publications | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

    Montrer seulement les éléments pour lesquels. Auteur

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  • Thorium vs Uranium Nuclear Power

    Thorium vs Uranium – Energy Release per Fission. In general, the nuclear fission results in the release of enormous quantities of energy. The amount of energy depends strongly on the nucleus to be fissioned and also depends strongly on the kinetic energy of an incident neutron.

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  • Géochimie isotopique du strontium des milieux ...

    En 1974, un essai de concertation et de conciliation a été tenté, sous l'impulsion du Professeur E. JÄGER de l'Université de Berne (Suisse), avec des propositions d'ARMSTRONG (1974) et d'AFANASS'YEV et al. (1974) pour revoir en même temps les constantes de désintégration de l'uranium, du thorium, du potassium et du rubidium.

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  • thorium ball mill

    processing of thorium ores with site plan. HEALTH amp; ENVIRONMENTAL PROTECTION STANDARDS FOR . Thorium Byproduct Materials Pursuant to Section 84 of the Atomic Energy Act of 1954, as Amended the processing of ores for the extraction of ura at a processing site which relate to such processing, including any residual stock of unprocessed ores or lowgrade materials.

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  • Geochemistry of rare earth elements in oceanic phillipsites

    Geochemistry of rare earth elements in oceanic phillipsites. Authors; Authors and affiliations ... accretions are enriched in REE and marked by a positive Ce anomaly. Oceanic phillipsites do not accumulate REE or inherit the REE signature of the volcaniclastic material and oceanic deep water. ... Les isotopes de l’uranium et du thorium et les ...

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  • Uranium, thorium, potassium and argon in marine phillipsites

    Analyses of elements at trace levels in phillipsites from Pacific Ocean deposits indicate the mineral continues to grow within the sedimentary thorium and uranium concentrations decrease while the mineral concentrations increase with depth in the deposit.

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  • Consulta: subjectFacets:"GEOCHIMIE" Registros recuperados: 695

    Science; Sciences de la Terre; Consulta: subjectFacets:"GEOCHIMIE" Registros recuperados: 695. publicité

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  • Uranium, Thorium, and Potassium in Black Shales of the ...

    Analyses of elements at trace levels in phillipsites from Pacific Ocean deposits indicate the mineral continues to grow within the sedimentary thorium and uranium concentrations ...

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  • Full text of "The constitution of the natural silicates"

    Full text of "The constitution of the natural silicates" See other formats ...

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  • Antevs AuthorTitle Catalog

    The Antevs Library Online Author Title Catalog The catalog includes nearly 7000 titles. The following list, arranged alphabetically by first author for dissertations theses, books and reprints; then by journal, map and media; can be searched using your browser's "FIND" (ctrlF) utility.

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  • Radionuclide Interactions With Soil and Rock Media: Volume ...

    The separation of uranium and thorium during weathering processes is accomplished in three ways: 1) Solution processes in which the minerals holding the thorium and uranium are put into true solution, 2) physical movement of resistates containing uranium and thorium, and 3) precipitation with clays, opal and other similar minerals.

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  • shmadz YouTube

    If you saw yesterday's video, you know I set a buy stop for Bitcoin at 11,600. You also know I set a sell stop for Bitcoin at 10,700. If you watched Bitcoin's price today, you know how this story...

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  • nkysdb:

    Measurement of Uranium, Thorium in Manganese Nodules using Fission Tracks and Alpha particle Tracks . 1971: におけるのについて On the Distribution of Minor Elements in the Valley of the Yoshino, Yamagata Prefecture

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  • Th228/Th232 and Pb210 geochronologies in marine and ...

    indicating that both radium and thorium isotopes are removed from solution in these coastal zones quite rapidly after introduction or formation. ... THE OCCURRENCES of the natural radioactive series of uranium and thorium in the ... Th228/3h232 and Pb210 geochronologies in marine and lake sediments 2 Pb210 ...

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  • Tantalum, uranium and scandium in heavy accessory oxides, Climax molybdenum mine, Climax, Colorado: 73., Detre, 1994: Spherulitesnew tool for global geological and planetological correlation: Abstracts of International Meeting "Spherulites (Micrometeorites) in the Carpathian Basin, Budapest 31 Oct. 1 Nov. 1994

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  • Marine geochemistry, Eos Transactions | ...

    Marine geochemistry Marine geochemistry Turekian, Karl K. 19710601 00:00:00 During the last 4 years (January 1967 through December 1970) several major trends in marine geo‐chemical studies in the United States can be noted, These are: (1) the intercalibration of radioactive, ‘chemical,’ and magnetic dating techniques in deep‐sea sediments; (2) the improvement in the understanding of ...

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  • Uranium, thorium, potassium and argon in marine phillipsites

    topics: milieu marin, zeolite, composition chimique, uranium, thorium, potassium, mesure, variation spatiale, profondeur, phillipsite, argon

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  • Thermodynamics of Ion Exchange and Water Molecule Behavior ...

    xml version standalone yes volume_errors unscanned previouspageid p2 page 1 thermodynamics of ion exchange and water molecule behavior in zeolites by jie wang a dissertation presented to the graduate school of the university of florid a in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida 2010 1

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  • Thorium Wikipedia

    Uranium–thorium dating is commonly used to determine the age of calcium carbonate materials such as speleothem or coral, because uranium is more soluble in water than thorium and protactinium, which are selectively precipitated into oceanfloor sediments, where their ratios are measured. The scheme has a range of several hundred thousand years.

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  • (PDF) Geochemistry of rare earth elements in oceanic ...

    PDF | The behavior of rare earth elements (REE) was examined in oceanic phillipsites collected from four horizons of eupelagic clay in the Southern Basin of the Pacific. The REE concentrations ...

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  • Get PDF Full Texts from EurekaMag Chapter 37028

    Get PDF Full Texts from EurekaMag Chapter 37028 Chapter 37028 provides scholary research titles of which PDF Full Texts are available through EurekaMag.

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  • Thoriumderived dust fluxes to the tropical Pacific Ocean ...

    Jun 15, 2012· Read "Thoriumderived dust fluxes to the tropical Pacific Ocean, 58 Ma, Geochimica et Cosmochimica Acta" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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  • Uranium, thorium, potassium and argon in marine phillipsites

    Abstract Analyses of elements at trace levels in phillipsites from Pacific Ocean deposits indicate the mineral continues to grow within the sedimentary thorium and uranium concentrations decrease while the mineral concentrations increase with depth in the deposit.

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  • Uranium–thorium dating Wikipedia

    Uranium–thorium dating, also called thorium230 dating, uraniumseries disequilibrium dating or uraniumseries dating, is a radiometric dating technique established in the 1960s which has been used since the 1970s to determine the age of calcium carbonate materials such as speleothem or coral.

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  • Uranium, thorium, potassium and argon in marine phillipsites

    Uranium, thorium, potassium and argon in marine phillipsites M~CHEL BERNAT,* RUDOLF H. BIERI, WORU KOIDE, JOHN J. GRIFFIN and EDWARD D. GOLDBERG Scripps Institution of Oceanography, University of California at San Diego La Jolle, California 92037 (Received 23 April 1970; accepted in revised form 26 illay 1970)

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  • New method for decomposition and comprehensive analysis of ...

    Uranium, thorium, potassium and argon in marine phillipsites. Geochimica et Cosmochimica Acta 1970, 34 (10) , 10531071. DOI: /00167037(70)901626. Mitsunobu Tatsumoto. U Th Pb age of Apollo 12 rock 12013.

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  • Thorium and uranium in marine barite IRD

    (3) Marine barites, like phillipsites and sea water, contain excess amounts of "'Th and are probably undergoing a continuous exchange chemistry within the thorium series as the re sult of zzsRa mobilization in the sedimentary column. 1. Introduction There has been mounting evidence within the last decade that the thorium and uranium decay ...

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  • Adsorptive and MembraneType Separations: A ...

    This paper continues a series of annual bibliographic updates of the published literature (since 1985) on adsorptive and membranetype separations (see Ray 1990–1998). This paper provides a useful and quick reference source to the 1998 journal literature (from the 50 most important chemical engineering journals) for researchers in this area.

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  • Thorium and uranium in marine barite Harvard University

    Abstract Analyses of thorium and uranium from deepsea barites and their sediments show that: (1) Marine barites concentrate thorium relative to their bulk sediments and appear to be growing near the sediment surface. However, some barites are found associated with ferromanganese deposits, and these barites, like continental varieties, are ...

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  • Uranium in natural phosphorites : the Syrian example. L ...

    Les phosphorites sénoniennes qui constituent les gisements des Palmyrides en Syrie (Khneifiss et Charquieh) ont été étudiées dans le but précis de déterminer les relations entre uranium et apatite dans ces gisements. Une très bonne corrélation UP₂O₆ existe dans ces gisements, plus nette cependant à Charquieh qu'à Khneifiss. La méthode des traces de fission permet de voir que l ...

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