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GeologyScience Repository: Recent submissions
Now showing items 3061-3080 of 40311
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(2005)We conducted a year-long, intensive monitoring program of live aquatic gastropods (Helisoma duryi, Melanoides tuberculata, Physa virgata, Pyrgulopsis sp., and Tyronia sp.) and their host springs in the Ash Meadows National ...
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(2005)The coordination environment of Fe(II) has been examined in seven anhydrous ferrosilicate glasses at 298 K and 1 bar using 57Fe Mössbauer, Fe K-edge X-ray near edge structure (XANES), and extended X-ray absorption fine ...
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AB INITIO MOLECULAR ORBITAL CALCULATIONS FOR BORON ISOTOPE FRACTIONATIONS ON BORIC ACIDS AND BORATES (2005)Ab initio quantum chemistry calculations have been performed on the isotopic exchange reaction between B(OH)3 and B(OH)4−. Several calculation methods have been carefully compared and evaluated. The “water-droplet” method ...
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(2005)The standard enthalpy of formation of thorite and huttonite and the enthalpy of the phase transition between these polymorphs were determined using high-temperature oxide melt solution calorimetry and transposed temperature ...
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(2005)Mammalian teeth are invaluable archives of ancient seasonality because they record along their growth axes an isotopic record of temporal change in environment, plant diet, and animal behavior. A major problem with the ...
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GEOCHEMICAL PROCESSES AND SOLUTE TRANSPORT AT THE SEAWATER/FRESHWATER INTERFACE OF A SANDY AQUIFER (2005)Geochemical processes occurring at a seawater/freshwater interface were studied in a shallow coastal siliclastic aquifer containing minor amounts of calcite. Data were collected from 106 piezometers in a 120-m transect ...
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(2005)A quantitative kinetic model has been proposed to simulate the large D and 13C isotope enrichments observed in individual n-alkanes (C13–C21) during artificial thermal maturation of a North Sea crude oil under anhydrous, ...
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(2005)Ruthenium tetroxide oxidation was used to examine the macromolecular insoluble organic matter (IOM) from the Orgueil and Murchison meteorites and especially to characterize the aliphatic linkages. Already applied to various ...
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(2005)Caustic high level radioactive waste induces mineral weathering reactions that can influence the fate of radionuclides released in the vicinity of leaking storage tanks. The uptake and release of CsI and SrII were studied ...
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(2005)Presented is an improved model for the prediction of phase equilibria and cage occupancy of CH4 and CO2 hydrate in aqueous systems. Different from most hydrate models that employ Kihara potential or Lennard-Jones potential ...
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(2005)A suite of experiments was performed to investigate the partitioning of Sr2+ (to mimic the radionuclide 90Sr) between calcite and artificial groundwater in response to the hydrolysis of urea (ureolysis) by Bacillus pasteurii ...
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(2005)We report results from an extensive study on the speciation of zinc (Zn) and its relation to the mobility and bioavailablity of this element in a smelter contaminated soil and an in situ remediated area of this soil 12 yr ...
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(2005)We have performed a thermodynamic analysis to determine the internal consistency of state-of-the-art experimental data for olivine, wadsleyite, and ringwoodite solid solutions. The analysis has been carried out between 200 ...
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(2005)Morphologies, petrographic settings and carbon and nitrogen isotopic compositions of graphites in the Acapulco meteorite, the latter determined by secondary ionization mass spectrometry, are reported. Seven different ...
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(2005)The aqueous complex ion Al30O8(OH)56(H2O)2618+ (Al30) has a variety of bridging and terminal amphoteric surface functional groups which deprotonate over a pH range of 4–7. Their relative degree of protonation is calculated ...
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(2005)We studied the effects of seed material and solution composition on calcite crystal precipitation using a pH-stat system. The seed materials investigated included quartz, dolomite, two calcites with different particle size ...
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(2005)Little or no information is available in the literature about reaction processes of co-sorbing metals and arsenate [As(V)] on variable-charged surfaces or factors influencing these reactions. Arsenic and metal contamination ...
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(2005)В статье рассмотрены вопросы стратиграфии и палеогеографии альбского (терминальный нижний мел) этапа существования западносибирского эпиконтинентального морского бассейна на территории Среднего и Южного Зауралья. Приведена ...
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(2005)В статье приводится стратиграфическое обоснование возрастного положения базальтов в Межкракинской зоне севера Зилаирского мегасинклинория на Южном Урале, характеристика их вещественного состава и геодинамическая обстановка ...
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(2005)The concentrations of P, V, Cr, Fe, Co, Ni, Cu, Ga, Ge, As, Mo, Ru, Rh, Pd, W, Re, Os, Ir, Pt, and Au in the group IVB iron meteorites Cape of Good Hope, Hoba, Skookum, Santa Clara, Tawallah Valley, Tlacotepec, and Warburton ...
Now showing items 3061-3080 of 40311