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Institutions of the University of Bayreuth
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Heisenberg Professorship - Experimental Biogeochemistry

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Number of items at this level: 50.

2020

Hömberg, Annkathrin ; Obst, Martin ; Knorr, Klaus-Holger ; Kalbitz, Karsten ; Schaller, Jörg:
Increased silicon concentration in fen peat leads to a release of iron and phosphate and changes in the composition of dissolved organic matter.
In: Geoderma. Vol. 374 (September 2020) . - No. 114422.
DOI: https://doi.org/10.1016/j.geoderma.2020.114422

Yang, Zhen ; Sun, Tianran ; Subdiaga, Edisson ; Obst, Martin ; Haderlein, Stefan ; Maisch, Markus ; Kretschmar, Ruben ; Angenent, Largus T. ; Kappler, Andreas:
Aggregation-dependent electron transfer via redox-active biochar particles stimulate microbial ferrihydrite reduction.
In: Science of the Total Environment. Vol. 703 (February 2020) . - No. 135515.
DOI: https://doi.org/10.1016/j.scitotenv.2019.135515

Tomaszewski, Elizabeth J. ; Olson, L. ; Obst, Martin ; Byrne, James M. ; Kappler, Andreas ; Muehe, E. Marie:
Complexation by cysteine and iron mineral adsorption limit cadmium mobility during metabolic activity of Geobacter sulfurreducens.
In: Environmental Science : Processes & Impacts. (2020) .
DOI: https://doi.org/10.1039/D0EM00244E

2019

Picard, Aude ; Gartman, Amy ; Cosmidis, Julie ; Obst, Martin ; Vidoudez, Charles ; Clarke, David R. ; Girguis, Peter R.:
Authigenic metastable iron sulfide minerals preserve microbial organic carbon in anoxic environments.
In: Chemical Geology. Vol. 530 (December 2019) . - No. 119343.
DOI: https://doi.org/10.1016/j.chemgeo.2019.119343

2018

Prabu, Vinod ; Obst, Martin ; Hosseinkhannazer, Hooman ; Reynolds, Matthew ; Rosendahl, Scott ; Wang, Jian ; Hitchcock, Adam P.:
Instrumentation for in-situ flow electrochemical Scanning Transmission X-ray Microscopy (STXM).
In: Review of Scientific Instruments. Vol. 89 (2018) Issue 6 . - No. 063702.
DOI: https://doi.org/10.1063/1.5023288

2017

Yanez H., Jorge E. ; Wang, Zi ; Lege, Sascha ; Obst, Martin ; Roehler, Sebstian ; Burkhardt, Claus J. ; Zwiener, Christian:
Application and characterization of electroactive membranes based on carbon nanotubes and zerovalent iron nanoparticles.
In: Water Research. Vol. 108 (January 2017) . - pp. 78-85.
DOI: https://doi.org/10.1016/j.watres.2016.10.055

Zeitvogel, Fabian ; Burkhardt, Claus J. ; Schroeppel, Birgit ; Schmid, Gregor ; Ingino, Pablo ; Obst, Martin:
Comparison of Preparation Methods of Bacterial Cell-Mineral Aggregates for SEM Imaging and Analysis Using the Model System of Acidovorax sp. BoFeN1.
In: Geomicrobiology Journal. Vol. 34 (2017) Issue 4 . - pp. 317-327.
DOI: https://doi.org/10.1080/01490451.2016.1189467

Nordhoff, Mark ; Tominski, Claudia ; Halama, Max ; Byrne, James ; Obst, Martin ; Kleindienst, Sara ; Behrens, Sebastian ; Kappler, Andreas:
Insights into Nitrate-Reducing Fe(II) Oxidation Mechanisms through Analysis of Cell-Mineral Associations, Cell Encrustation, and Mineralogy in the Chemolithoautotrophic Enrichment Culture KS.
In: Applied and Environmental Microbiology. Vol. 83 (2017) Issue 13 . - No. e00752-17.
DOI: https://doi.org/10.1128/AEM.00752-17

Laufer, Katja ; Nordhoff, Mark ; Halama, Max ; Martinez, Raul E. ; Obst, Martin ; Nowak, Marcus ; Stryhanyuk, Hryhoriy ; Richnow, Hans-Hermann ; Kappler, Andreas:
Microaerophilic Fe(II)-Oxidizing Zetaproteobacteria Isolated from Low-Fe Marine Coastal Sediments : Physiology and Composition of Their Twisted Stalks.
In: Applied and Environmental Microbiology. Vol. 83 (2017) Issue 8 . - e03118-16.
DOI: https://doi.org/10.1128/AEM.03118-16

Hagemann, Nikolas ; Joseph, Stephen ; Schmidt, Hans-Peter ; Kammann, Claudia ; Harter, Johannes ; Borch, Thomas ; Young, Robert B. ; Varga, Krisztina ; Taherymoosavi, Sarasadat ; Elliott, K. Wade ; McKenna, Amy ; Albu, Mihaela ; Mayrhofer, Claudia ; Obst, Martin ; Conte, Pellegrino ; Dieguez-Alonso, Alba ; Orsetti, Silvia ; Subdiaga, Edisson ; Behrens, Sebastian ; Kappler, Andreas:
Organic coating on biochar explains its nutrient retention and stimulation of soil fertility.
In: Nature Communications. Vol. 8 (2017) Issue 1 . - No. 1089.
DOI: https://doi.org/10.1038/s41467-017-01123-0

Zobi, Fabio ; Obst, Martin:
Two- and Three-dimensional Mid-Infrared Chemical Imaging.
In: Chimia. Vol. 71 (2017) Issue 1 . - pp. 32-37.
DOI: https://doi.org/10.2533/chimia.2017.32

2016

She, Mengyao ; Yang, Zheng ; Hao, Likai ; Wang, Zhaohui ; Luo, Tianyou ; Obst, Martin ; Liu, Ping ; Shen, Yehua ; Zhang, Shengyong ; Li, Jianli:
A novel approach to study the structure-property relationships and applications in living systems of modular Cu2+ fluorescent probes.
In: Scientific Reports. Vol. 6 (August 2016) . - No. 28972.
DOI: https://doi.org/10.1038/srep28972

Jin, Xilang ; Wu, Shaoping ; She, Mengyao ; Jia, Yifan ; Hao, Likai ; Yin, Bing ; Wang, Lanying ; Obst, Martin ; Shen, Yehua ; Zhang, Yongmin ; Li, Jianli:
Novel Fluorescein-Based Fluorescent Probe for Detecting H2S and Its Real Applications in Blood Plasma and Biological Imaging.
In: Analytical Chemistry. Vol. 88 (2016) Issue 22 . - pp. 11253-11260.
DOI: https://doi.org/10.1021/acs.analchem.6b04087

2014

Eickhoff, Merle ; Obst, Martin ; Schröder, Christian ; Hitchcock, Adam P. ; Tyliszczak, Tolek ; Martinez, Raul E. ; Robbins, Leslie J. ; Konhauser, Kurt O. ; Kappler, Andreas:
Nickel partitioning in biogenic and abiogenic ferrihydrite : The influence of silica and implications for ancient environments.
In: Geochimica et Cosmochimica Acta. Vol. 140 (September 2014) . - pp. 65-79.
DOI: https://doi.org/10.1016/j.gca.2014.05.021

Schmid, Gregor ; Zeitvogel, Fabian ; Hao, Likai ; Ingino, Pablo ; Floetenmeyer, Matthias ; Stierhof, York-D. ; Schroeppel, Birgit ; Burkhardt, Claus J. ; Kappler, Andreas ; Obst, Martin:
3-D analysis of bacterial cell-(iron)mineral aggregates formed during Fe(II) oxidation by the nitrate-reducing Acidovorax sp. strain BoFeN1 using complementary microscopy tomography approaches.
In: Geobiology. Vol. 12 (July 2014) Issue 4 . - pp. 340-361.
DOI: https://doi.org/10.1111/gbi.12088

Wu, Wenfang ; Swanner, Elizabeth D. ; Hao, Likai ; Zeitvogel, Fabian ; Obst, Martin ; Pan, Yongxin ; Kappler, Andreas:
Characterization of the physiology and cell–mineral interactions of the marine anoxygenic phototrophic Fe(II) oxidizer Rhodovulum iodosum – implications for Precambrian Fe(II) oxidation.
In: FEMS Microbiology Ecology. Vol. 88 (June 2014) Issue 3 . - pp. 503-515.
DOI: https://doi.org/10.1111/1574-6941.12315

Schmid, Gregor ; Zeitvogel, Fabian ; Hao, Likai ; Ingino, Pablo ; Kuerner, Wolfgang ; Dynes, James J. ; Karunakaran, Chithra ; Wang, Jian ; Lu, Yingshen ; Ayers, Travis ; Schietinger, Chuck ; Hitchcock, Adam P. ; Obst, Martin:
Synchrotron-Based Chemical Nano-Tomography of Microbial Cell-Mineral Aggregates in their Natural, Hydrated State.
In: Microscopy and Microanalysis. Vol. 20 (April 2014) Issue 2 . - pp. 531-536.
DOI: https://doi.org/10.1017/S1431927613014104

Schmid, Gregor ; Obst, Martin:
3D chemical mapping : Application of scanning transmission (soft) X-ray microscopy (STXM) in combination with angle-scan tomography in bio-, geo- and environmental science.
In: Kuo, John (ed.): Electron Microscopy : Methods and Protocols. 3rd ed. - Totowa, NJ : Humana Press, 2014 . - pp. 757-781 . - (Methods in Molecular Biology, Methods and Protocols ; 1117 )
DOI: https://doi.org/10.1007/978-1-62703-776-1

Klueglein, Nicole ; Zeitvogel, Fabian ; Stierhof, York-D. ; Floetenmeyer, Matthias ; Konhauser, Kurt O. ; Kappler, Andreas ; Obst, Martin:
Potential Role of Nitrite for Abiotic Fe(II) Oxidation and Cell Encrustation during Nitrate Reduction by Denitrifying Bacteria.
In: Applied and Environmental Microbiology. Vol. 80 (2014) Issue 3 . - pp. 1051-1061.
DOI: https://doi.org/10.1128/AEM.03277-13

2013

Joens, Matthew S. ; Huynh, Chuong ; Kasuboski, James M. ; Ferranti, David ; Sigal, Yury J. ; Zeitvogel, Fabian ; Obst, Martin ; Burkhardt, Claus J. ; Curran, Kevin P. ; Chalasani, Sreekanth H. ; Stern, Lewis A. ; Goetze, Bernhard ; Fitzpatrick, James A. J.:
Helium Ion Microscopy (HIM) for the imaging of biological samples at sub-nanometer resolution.
In: Scientific Reports. Vol. 3 (December 2013) . - No. 3514.
DOI: https://doi.org/10.1038/srep03514

Jin, Xilang ; Hao, Likai ; Hu, Yanling ; She, Mengyao ; Shi, Yanning ; Obst, Martin ; Li, Jianli ; Shi, Zhen:
Two novel fluorescein-based fluorescent probes for hypochlorite and its real applications in tap water and biological imaging.
In: Sensors and Actuators B: Chemical. Vol. 186 (September 2013) . - pp. 56-60.
DOI: https://doi.org/10.1016/j.snb.2013.05.079

Shimizu, Masayuki ; Zhou, Jihai ; Schröder, Christian ; Obst, Martin ; Kappler, Andreas ; Borch, Thomas:
Dissimilatory Reduction and Transformation of Ferrihydrite-Humic Acid Coprecipitates.
In: Environmental Science & Technology. Vol. 47 (2013) Issue 23 . - pp. 13375-13384.
DOI: https://doi.org/10.1021/es402812j

Muehe, E. Marie ; Obst, Martin ; Hitchcock, Adam P. ; Tyliszczak, Tolek ; Behrens, Sebastian ; Schröder, Christian ; Byrne, James M. ; Michel, F. Marc ; Krämer, Ute ; Kappler, Andreas:
Fate of Cd during Microbial Fe(III) Mineral Reduction by a Novel and Cd-Tolerant Geobacter Species.
In: Environmental Science & Technology. Vol. 47 (2013) Issue 24 . - pp. 14099-14109.
DOI: https://doi.org/10.1021/es403365w

Klueglein, Nicole ; Lösekann-Behrens, Tina ; Obst, Martin ; Behrens, Sebastian ; Appel, Erwin ; Kappler, Andreas:
Magnetite Formation by the Novel Fe(III)-reducing Geothrix fermentans Strain HradG1 Isolated from a Hydrocarbon-Contaminated Sediment with Increased Magnetic Susceptibility.
In: Geomicrobiology Journal. Vol. 30 (2013) Issue 10 . - pp. 863-873.
DOI: https://doi.org/10.1080/01490451.2013.790922

Hao, Likai ; Li, Jianli ; Kappler, Andreas ; Obst, Martin:
Mapping of Heavy Metal Ion Sorption to Cell-Extracellular Polymeric Substance-Mineral Aggregates by Using Metal-Selective Fluorescent Probes and Confocal Laser Scanning Microscopy.
In: Applied and Environmental Microbiology. Vol. 79 (2013) Issue 21 . - pp. 6524-6534.
DOI: https://doi.org/10.1128/AEM.02454-13

Muehe, E. Marie ; Adaktylou, Irini J. ; Obst, Martin ; Zeitvogel, Fabian ; Behrens, Sebastian ; Planer-Friedrich, Britta ; Krämer, Ute ; Kappler, Andreas:
Organic carbon and reducing conditions lead to cadmium immobilization by secondary Fe mineral formation in a pH-neutral soil.
In: Environmental Science & Technology. Vol. 47 (2013) Issue 23 . - pp. 13430-13439.
DOI: https://doi.org/10.1021/es403438n

Yang, Zheng ; Hao, Likai ; Yin, Bing ; She, Mengyao ; Obst, Martin ; Kappler, Andreas ; Li, Jianli:
Six-Membered Spirocycle Triggered Probe for Visualizing Hg2+ in Living Cells and Bacteria–EPS–Mineral Aggregates.
In: Organic Letters. Vol. 15 (2013) Issue 17 . - pp. 4334-4337.
DOI: https://doi.org/10.1021/ol401795m

2012

Hitchcock, Adam P. ; Obst, Martin ; Wang, Jian ; Lu, Yingshen ; Tyliszczak, Tolek:
Advances in the detection of as in environmental samples using low energy X-ray fluorescence in a scanning transmission X-ray microscope : arsenic immobilization by an Fe(II)-oxidizing freshwater bacteria.
In: Environmental Science & Technology. Vol. 46 (2012) Issue 5 . - pp. 2821-2829.
DOI: https://doi.org/10.1021/es202238k

Pantke, Claudia ; Obst, Martin ; Benzerara, Karim ; Morin, Guillaume ; Ona-Nguema, Georges ; Dippon, Urs ; Kappler, Andreas:
Green Rust Formation during Fe(II) Oxidation by the Nitrate-Reducing Acidovorax sp. Strain BoFeN1.
In: Environmental Science & Technology. Vol. 46 (2012) Issue 3 . - pp. 1439-1446.
DOI: https://doi.org/10.1021/es2016457

Hilhorst, Jan ; van Schooneveld, Matti M. ; Wang, Jian ; de Smit, Emiel ; Tyliszczak, Tolek ; Raabe, Jörg ; Hitchcock, Adam P. ; Obst, Martin ; de Groot, Frank M. F. ; Pethukov, Andrei V.:
Three-Dimensional Structure and Defects in Colloidal Photonic Crystals Revealed by Tomographic Scanning Transmission X-ray Microscopy.
In: Langmuir. Vol. 28 (2012) Issue 7 . - pp. 3614-3620.
DOI: https://doi.org/10.1021/la204580y

2011

Benzerara, Karim ; Menguy, Nicolas ; Obst, Martin ; Stolarski, JarosŁaw ; Mazur, Maciej ; Tyliszczak, Tolek ; Brown Jr., Gordon E. ; Meibom, Anders:
Study of the crystallographic architecture of corals at the nanoscale by scanning transmission X-ray microscopy and transmission electron microscopy.
In: Ultramicroscopy. Vol. 111 (July 2011) Issue 8 . - pp. 1268-1275.
DOI: https://doi.org/10.1016/j.ultramic.2011.03.023

Obst, Martin ; Grathwohl, Peter ; Kappler, Andreas ; Eibl, Oliver ; Peranio, Nicola ; Gocht, Tilman:
Quantitative High-Resolution Mapping of Phenanthrene Sorption to Black Carbon Particles.
In: Environmental Science & Technology. Vol. 45 (2011) Issue 17 . - pp. 7314-7322.
DOI: https://doi.org/10.1021/es2009117

2010

Lam, Karen P. ; Hitchcock, Adam P. ; Obst, Martin ; Lawrence, John R. ; Swerhone, George D. W. ; Leppard, Gary G. ; Tyliszczak, Tolek ; Karunakaran, Chithra ; Wang, Jian ; Kaznatcheev, Konstantin V. ; Bazylinski, Dennis A. ; Lins, Ulysses:
Characterizing magnetism of individual magnetosomes by X-ray magnetic circular dichroism in a scanning transmission X-ray microscope.
In: Chemical Geology. Vol. 270 (2010) Issue 1-4 . - pp. 110-116.
DOI: https://doi.org/10.1016/j.chemgeo.2009.11.009

2009

Obst, Martin ; Wehrli, Bernhard ; Dittrich, Maria:
CaCO3 nucleation by cyanobacteria : laboratory evidence for a passive, surface-induced mechanism.
In: Geobiology. Vol. 7 (2009) Issue 3 . - pp. 324-347.
DOI: https://doi.org/10.1111/j.1472-4669.2009.00200.x

Miot, Jennyfer ; Benzerara, Karim ; Obst, Martin ; Kappler, Andreas ; Hegler, Florian ; Schädler, Sebastian ; Bouchez, Camille ; Guyot, François ; Morin, Guillaume:
Extracellular Iron Biomineralization by Photoautotrophic Iron-Oxidizing Bacteria.
In: Applied and Environmental Microbiology. Vol. 75 (2009) Issue 17 . - pp. 5586-5591.
DOI: https://doi.org/10.1128/AEM.00490-09

Miot, Jennyfer ; Benzerara, Karim ; Morin, Guillaume ; Kappler, Andreas ; Bernard, Sylvain ; Obst, Martin ; Férard, Céline ; Skouri-Panet, Fériel ; Guigner, Jean-Michel ; Posth, Nicole ; Galvez, Matthieu ; Brown Jr., Gordon E. ; Guyot, François:
Iron biomineralization by anaerobic neutrophilic iron-oxidizing bacteria.
In: Geochimica et Cosmochimica Acta. Vol. 73 (2009) Issue 3 . - pp. 696-711.
DOI: https://doi.org/10.1016/j.gca.2008.10.033

Norlund, Kelsey L. I. ; Southam, Gordon ; Tyliszczak, Tolek ; Hu, Yongfeng ; Karunakaran, Chithra ; Obst, Martin ; Hitchcock, Adam P. ; Warren, Lesley A.:
Microbial architecture of environmental sulfur processes: a novel syntrophic sulfur-metabolizing consortia.
In: Environmental Science & Technology. Vol. 43 (2009) Issue 23 . - pp. 8781-8786.
DOI: https://doi.org/10.1021/es803616k

Hanhan, Stephanie ; Smith, Anne Marie ; Obst, Martin ; Hitchcock, Adam P.:
Optimization of analysis of soft X-ray spectromicroscopy at the Ca 2p edge.
In: Journal of Electron Spectroscopy and Related Phenomena. Vol. 173 (2009) Issue 1 . - pp. 44-49.
DOI: https://doi.org/10.1016/j.elspec.2009.04.010

Obst, Martin ; Dynes, James J. ; Lawrence, John R. ; Swerhone, George D. W. ; Benzerara, Karim ; Karunakaran, Chithra ; Kaznatcheev, Konstantin V. ; Tyliszczak, Tolek ; Hitchcock, Adam P.:
Precipitation of amorphous CaCO3 (aragonite-like) by cyanobacteria: A STXM study of the influence of EPS on the nucleation process.
In: Geochimica et Cosmochimica Acta. Vol. 73 (2009) Issue 14 . - pp. 4180-4198.
DOI: https://doi.org/10.1016/j.gca.2009.04.013

Obst, Martin ; Wang, Jian ; Hitchcock, Adam P.:
Soft X-ray spectro-tomography study of cyanobacterial biomineral nucleation.
In: Geobiology. Vol. 7 (2009) Issue 5 . - pp. 577-591.
DOI: https://doi.org/10.1111/j.1472-4669.2009.00221.x

Hitchcock, Adam P. ; Dynes, James J. ; Lawrence, John R. ; Obst, Martin ; Swerhone, George D. W. ; Korber, Darren R. ; Leppard, Gary G.:
Soft X-ray spectromicroscopy of nickel sorption in a natural river biofilm.
In: Geobiology. Vol. 7 (2009) Issue 4 . - pp. 432-453.
DOI: https://doi.org/10.1111/j.1472-4669.2009.00211.x

2008

Hunter, Ryan C. ; Hitchcock, Adam P. ; Dynes, James J. ; Obst, Martin ; Beveridge, Terry J.:
Mapping the speciation of iron in Pseudomonas aeruginosa biofilms using scanning transmission X-ray microscopy.
In: Environmental Science & Technology. Vol. 42 (2008) Issue 23 . - pp. 8766-8772.
DOI: https://doi.org/10.1021/es801642z

Najafi, Ebrahim ; Cruz, Daniel Hernández ; Obst, Martin ; Hitchcock, Adam P. ; Douhard, Bastien ; Pireux, Jean-Jacques ; Felten, Alexandre:
Polarization Dependence of the C 1s X-ray Absorption Spectra of Individual Multi-Walled Carbon Nanotubes.
In: Small : nano micro. Vol. 4 (2008) Issue 12 . - pp. 2279-2285.
DOI: https://doi.org/10.1002/smll.200800439

2007

Kaznacheyev, Konstantin V. ; Karunakaran, Chithra ; He, F. ; Sigrist, Michael ; Summers, Tasha ; Obst, Martin ; Hitchcock, Adam P.:
CLS ID-10 chicane configuration : From “Simple Sharing” to extended performance with high-speed polarization switching.
In: Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment. Vol. 582 (2007) Issue 1 . - pp. 103-106.
DOI: https://doi.org/10.1016/j.nima.2007.08.082

Kaznatcheev, Konstantin V. ; Karunakaran, Chithra ; Lanke, Uday D. ; Urquhart, Stephen G. ; Obst, Martin ; Hitchcock, Adam P.:
Soft X-ray spectromicroscopy beamline at the CLS : Commissioning results.
In: Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment. Vol. 582 (2007) Issue 1 . - pp. 96-99.
DOI: https://doi.org/10.1016/j.nima.2007.08.083

2006

2005

Obst, Martin ; Gasser, Philippe ; Mavrocordatos, Denis ; Dittrich, Maria:
TEM-specimen preparation of cell/mineral interfaces by Focused Ion Beam milling.
In: American Mineralogist. Vol. 90 (2005) Issue 8-9 . - pp. 1270-1277.
DOI: https://doi.org/10.2138/am.2005.1743

2004

Dittrich, Maria ; Obst, Martin:
Are Picoplankton Responsible for Calcite Precipitation in Lakes?
In: Ambio. Vol. 33 (2004) Issue 8 . - pp. 559-564.
DOI: https://doi.org/10.1579/0044-7447-33.8.559

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