The long-lived radionuclide 79Se is one of the elements of concern for the safe storage of high-level nuclear waste, since clay minerals in engineered barriers and natural aquifer sediments strongly adsorb cationic species, but to lesser extent…
Papers in Geochemistry
Geochemistry papers in Earth Sciences, X
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X-ray absorption fine structure (XAFS) measurements was used at the U L3-edge to directly determine the pH dependence of the cell wall functional groups responsible for the absorption of aqueous UO22+ to Bacillus subtilis from pH 1.67 to 4.80.…
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Zinc is one of the most widespread trace metals (TMs) in Earth surface environments and is the most concentrated TM in the downstream section of the Seine River (France) due to significant anthropogenic input from the Paris conurbation. In order to…
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We have used X-ray absorption fine-structure spectroscopy (XAFS) to investigate As(III) adsorption on bulk Georgia kaolin (KGa-1b), Wyoming smectite (SWy-2), anatase (TiO2), gibbsite Al(OH)3, and amorphous silica (am-SiO2) with the goal of…
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Over the last eight years, a large number of x-ray absorption near edge structure (XANES) and/or electron energy loss near edge structure (ELNES) spectroscopic calculations for complex oxides and nitrides have been performed using the…
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Arsenic is an element that is ubiquitous in the environment and is known to form compounds with toxic, even carcinogenic properties. Arsenic toxicity is a function of its chemical form (species). Identification of arsenic species is necessary to…
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A new scheme for calculating the x-ray absorption near edge structure (XANES) based on the finite-difference method is proposed. It allows completely free potential shape and, in particular, is not constrained to the muffin-tin approximation. In our…
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We investigated the As(III) and As(V) adsorption complexes forming at the gamma-Al(2)O(3)/water interface as a function of pH and ionic strength (I), using a combination of adsorption envelopes, electrophoretic mobility (EM) measurements, and X-ray…
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X-ray absorption spectroscopic study of Fe reference compounds for the analysis of natural sedimentsSynchrotron X-ray absorption spectroscopy (XAS) is becoming an increasingly popular tool for the analysis of element speciation in complex natural mixtures such as soils and sediments. Identifica- tion of a particular mineral or amorphous solid in a…
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Recent research has shown that the presence of stereotype-relevant environmental cues can inadvertently bias people's judgments of others in the direction of the stereotype. The present research demonstrated analogous activation effects on…
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Phosphatidylglycerol (PG) is an anionic lipid commonly found in large proportions in the cell membranes of bacteria and plants and, to a lesser extent, in animal cells. PG plays an important role in the regulation and determination of the elastic…
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New data are reported from powder X-ray diffraction (XRD) investigations of fractions obtained from separation of the bulk heptane-asphaltenes into subfractions using toluene-heptane mixtures. The latter indicate that when removing large parts of…
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The mineral composition of nine species of red calcareous algae (Corallinaceae, Rhodophyta) collected in the Adriatic Sea in 1987 and 1988 was examined by X-ray powder diffraction (counter diffractometer, monochromatized CuK-alpha radiation). In…
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One challenge in software design is ensuring that the design meets the requirements of the user. One way to do this is to create a prototype from the design, then devising a set of test cases to test for the behavioral requirements. Here we present…
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X-ray fluorescence spectrometry of asteroid 25143 Itokawa was performed by the x-ray spectrometer onboard Hayabusa during the first touchdown on 19 November 2005. We selected those data observed during relatively enhanced solar activity and…
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We discuss X-ray line formation in dense O star winds. A random distribution of wind shocks is assumed to emit X-rays that are partially absorbed by cooler wind gas. The cool gas resides in highly compressed fragments oriented perpendicular to the…
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For the purpose of analyzing and imaging chemical components of cells and tissues at the electron microscopic level, 3 fundamental methods are available, chemical, physical and biological. Among the physical methods, two methods qualifying and…
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An Arthrobacter species capable of extracting Fe from hornblende was isolated from a soil from the Adirondacks, NY (USA). This bacteria isolate, used in batch experiments with hornblende, accelerated the release of Fe from hornblende without…
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Synthetic Tricalcium Phosphate (ß- TCP), with the lowest as possible Mg- content which is necessary for the structure stabilization, was investigated by powder diffraction. Using the well-known structure the rhombohedral cell parameters were refined…
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In this review, we focus on the most significant and essential progress in X-ray spectrometry (XRS) published during the period from January 2010 to August 2011 covering developments and improvements in X-ray optics, X-ray detectors, new…
Papers in associated sub-disciplines
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