Search Results - "Kretzschmar, R."

Dissolution mechanisms of goethite in the presence of siderophores and organic acids by Reichard, P.U., Kretzschmar, R., Kraemer, S.M.

“…In dynamic natural systems such as soils and surface waters, transient biogeochemical processes can induce strong chemical non-steady-state conditions. In this…”
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Biogeochemical processes and arsenic enrichment around rice roots in paddy soil: results from micro-focused X-ray spectroscopy by Frommer, J., Voegelin, A., Dittmar, J., Marcus, M. A., Kretzschmar, R.

“…The spatial distribution and speciation of iron (Fe), manganese (Mn) and arsenic (As) around rice roots grown in an As‐affected paddy field in Bangladesh were…”
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Calcium isotope fractionation in alpine plants by Hindshaw, R. S., Reynolds, B. C., Wiederhold, J. G., Kiczka, M., Kretzschmar, R., Bourdon, B.

“…In order to develop Ca isotopes as a tracer for biogeochemical Ca cycling in terrestrial environments and for Ca utilisation in plants, stable calcium isotope…”
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Differential morphology of the superior olivary complex of Meriones unguiculatus and Monodelphis domestica revealed by calcium-binding proteins by Bazwinsky-Wutschke, I., Härtig, W., Kretzschmar, R., Rübsamen, R.

“…In mammals, the superior olivary complex (SOC) of the brainstem is composed of nuclei that integrate afferent auditory originating from both ears. Here, the…”
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Characterization of zinc in contaminated soils: complementary insights from isotopic exchange, batch extractions and XAFS spectroscopy by Degryse, F., Voegelin, A., Jacquat, O., Kretzschmar, R., Smolders, E.

“…Isotopic exchange (IE) of trace metals is an established method for characterizing metal reactivity in soils, but it is still unclear which metal species are…”
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Evolution of carbon fluxes during initial soil formation along the forefield of Damma glacier, Switzerland by Guelland, K., Hagedorn, F., Smittenberg, R. H., Göransson, H., Bernasconi, S. M., Hajdas, I., Kretzschmar, R.

“…Soil carbon (C) fluxes, soil respiration and dissolved organic carbon (DOC) leaching were explored along the young Damma glacier forefield chronosequence…”
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Goethite dissolution in the presence of phytosiderophores: rates, mechanisms, and the synergistic effect of oxalate by Reichard, P.U, Kraemer, S.M, Frazier, S.W, Kretzschmar, R

“…The purpose of this study was the elucidation of the chemical mechanism of an important process in iron acquisition by graminaceous plants: the dissolution of…”
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Chemical Heterogeneity of Organic Soil Colloids Investigated by Scanning Transmission X-ray Microscopy and C-1s NEXAFS Microspectroscopy by Schumacher, Marc, Christl, Iso, Scheinost, Andreas C, Jacobsen, Chris, Kretzschmar, Ruben

“…Colloid release and deposition in soils and sorption of inorganic and organic pollutants to soil colloids are strongly influenced by the composition and…”
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Combining Selective Sequential Extractions, X-ray Absorption Spectroscopy, and Principal Component Analysis for Quantitative Zinc Speciation in Soil by Scheinost, Andreas C, Kretzschmar, Ruben, Pfister, Sabina, Roberts, Darryl R

“…Selective sequential extractions (SSE) and, more recently, X-ray absorption fine-structure (XAFS) spectroscopy have been used to characterize the speciation of…”
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An American in Zurich: Jerry Schnoor as an Ambassador for U.S. Environmental Science and Engineering by Hering, J. G, Giger, W, Hug, S. J, Kohler, H. P. E, Kretzschmar, R, Schwarzenbach, R, Sigg, L, Sulzberger, B, von Gunten, U, Zehnder, A. J. B, Zobrist, J

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Calcium isotope fractionation in alpine plants by HINDSHAW, R. S, REYNOLDS, B. C, WIEDERHOLD, J. G, KICZKA, M, KRETZSCHMAR, R, BOURDON, B

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Detrital and pedogenic magnetic mineral phases in the loess/palaeosol sequence at Lingtai (Central Chinese Loess Plateau) by Spassov, S, Heller, F, Kretzschmar, R, Evans, M.E, Yue, L.P, Nourgaliev, D.K

“…A detailed rock magnetic investigation of loess/palaeosol samples from the section at Lingtai on the central Chinese Loess Plateau (CLP) is presented. Thermal…”
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Absolute Aggregation Rate Constants of Hematite Particles in Aqueous Suspensions: A Comparison of Two Different Surface Morphologies by Schudel, M., Behrens, S.H., Holthoff, H., Kretzschmar, R., Borkovec, M.

“…Measurements of absolute aggregation rate constants were performed for two samples of well-characterized spheroidal hematite particles with rather different…”
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Competitive sorption of copper and lead at the oxide-water interface: Implications for surface site density by Christl, Iso, Kretzschmar, Ruben

“…The competitive sorption of Cu(II) and Pb(II) to colloidal hematite was investigated as a function of pH and total metal concentration. Acid–base titrations of…”
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Competitive ligand exchange between Cu-humic acid complexes and methanobactin by Pesch, M.-L., Hoffmann, M., Christl, I., Kraemer, S. M., Kretzschmar, R.

“…Copper has been found to play a key role in the physiology of methanotrophic micro‐organisms, and methane oxidation may critically depend on the availability…”
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Mineralisation and leaching of C from 13C labelled plant litter along an initial soil chronosequence of a glacier forefield by Guelland, K., Esperschütz, J., Bornhauser, D., Bernasconi, S.M., Kretzschmar, R., Hagedorn, F.

“…Soils are accumulating C during their initial development but little is known on the evolution of soil C fluxes and their components. In this study, we…”
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Modelling sorption and mobility of cadmium and zinc in soils with scaled exchange coefficients by Voegelin, A, Kretzschmar, R

“…Summary Adsorption isotherms of Cd or Zn in soils of varying composition are often described using generalized Freundlich equations with scaled model…”
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Experimental determination of colloid deposition rates and collision efficiencies in natural porous media by Kretzschmar, R. (Swiss Federal Institute of Technology, Schlieren, Switzerland.), Barmettler, K, Grolimund, D, Yan, Y.D, Borkovec, M, Sticher, H

“…Mobile colloids in groundwater aquifers and soils can serve as carriers for strongly sorbing contaminants and thereby facilitate contaminant transport…”
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Cation competition in a natural subsurface material: Prediction of transport behavior by Vulava, V. M., Kretzschmar, R., Barmettler, K., Voegelin, A., Grolimund, D., Borkovec, M.

“…Predicting the transport of reactive chemicals in subsurface porous media requires accurate adsorption models. This study compares the ability of various…”
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Cation Competition in a Natural Subsurface Material:  Modeling of Sorption Equilibria by Vulava, V. M, Kretzschmar, R, Rusch, U, Grolimund, D, Westall, J. C, Borkovec, M

“…Accurate models of cation exchange are a prerequisite for predicting the transport of cations in soils and groundwater aquifers. In this paper, we investigate…”
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