Results 11 to 20 of about 2,338 (195)

Hydrothermal sulfidation of biogenic magnetite produces framboid-like pyrite

Communications Earth & Environment
Biogenic magnetite is a potential biosignature for microbial iron cycling in hydrothermal sulfide systems, critical environments for unraveling the emergence and early evolution of life.
Eric Runge, Muammar Mansor, Tsz Ho Chiu, Jeremiah Shuster, Stefan Fischer, Andreas Kappler, Jan-Peter Duda   +6 more
doaj   +3 more sources

Comparing Paleointensity Recording Efficiencies of Detrital and Biogenic Magnetite by Deposition Experiments With Synthetic Sediments

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Marine sediments contain magnetic mineral particles of detrital, biogenic and authigenic origin that record changes in the direction and intensity of the geomagnetic field over geological time. Previous studies have demonstrated that the recording efficiencies of detrital and biogenic magnetite differ.
Kuang He, Huafeng Qin, Sophie C. Roud, Zhaoxia Jiang, Menghan Li, Wenhui Li, Yu‐An Du, Sanzhong Li, Tilo von Dobeneck   +8 more
wiley   +2 more sources

Products of abiotic U(VI) reduction by biogenic magnetite and vivianite [PDF]

Geochimica et Cosmochimica Acta, 2011
Reductive immobilization of uranium by the stimulation of dissimilatory metal-reducing bacteria (DMRB) has been investigated as a remediation strategy for subsurface U(VI) contamination. In those environments, DMRB may utilize a variety of electron acceptors, such as ferric iron which can lead to the formation of reactive biogenic Fe(II) phases.
Harish Veeramani, Daniel S. Alessi, Elena I. Suvorova, Juan S. Lezama-Pacheco, Joanne E. Stubbs, Jonathan O. Sharp, Urs Dippon, Andreas Kappler, John R. Bargar, Rizlan Bernier-Latmani   +9 more
openaire   +4 more sources

Rock magnetic criteria for the detection of biogenic magnetite

Earth and Planetary Science Letters, 1993
Abstract We report results on the magnetic properties of magnetites produced by magnetotactic and dissimilatory iron-reducing bacteria. Magnetotactic bacterial (MTB) strains MS1, MV1 and MV2 and dissimilatory iron-reducing bacterium strain GS-15, grown in pure cultures, were used in this study.
Moskowitz, Bruce M., Frankel, Richard B., Bazylinski, Dennis A.   +2 more
openaire   +5 more sources

Upgrading of heavy oil by dispersed biogenic magnetite catalysts [PDF]

Fuel, 2016
In situ catalytic upgrading of heavy oil offers significant cost savings and overcomes logistical challenges associated with the high viscosity, low API gravity and high molecular weight fractions of unconventional hydrocarbon resources. The THAI-CAPRI process (toe-to-heel air injection – catalytic upgrading process in situ) offers one such route to ...
Brown, Ashley, Hart, Abarasi, Coker, Victoria; id_orcid 0000-0002-1332-216X, Lloyd, Jonathan; id_orcid 0000-0002-0719-0498, Wood, Joseph   +4 more
core   +4 more sources

Biogenic Magnetite Nanoparticle Ensemble Use in MRI Diagnostics

Acta Physica Polonica A, 2014
We present a simple analytical tool, which allows the calculation of the MRI diagnostics feasibility of the biogenic magnetite nanoparticles. Elevated levels of these particles are usually linked to the pathological processes, especially to neurodegenerative disorders.
O. Strbak, A. Krafcik, M. Teplan, D. Gogola, P. Kopcansky, I. Frollo   +5 more
openaire   +2 more sources

Continuous Production of Biogenic Magnetite Nanoparticles by the Marine Bacterium Magnetovibrio blakemorei Strain MV-1^T with a Nitrous Oxide Injection Strategy. [PDF]

Mar Drugs, 2022
Magnetotactic bacteria (MTB) produce magnetosomes, which are membrane-embedded magnetic nanoparticles. Despite their technological applicability, the production of magnetite magnetosomes depends on the cultivation of MTB, which results in low yields ...
Correa T, Godoy MG, Bazylinski DA, Abreu F.   +3 more
europepmc   +2 more sources

Novel Extracellular Electron Transfer Channels in a Gram-Positive Thermophilic Bacterium

Frontiers in Microbiology, 2021
Biogenic transformation of Fe minerals, associated with extracellular electron transfer (EET), allows microorganisms to exploit high-potential refractory electron acceptors for energy generation.
Sergey N. Gavrilov, Daria G. Zavarzina, Ivan M. Elizarov, Tamara V. Tikhonova, Natalia I. Dergousova, Vladimir O. Popov, Vladimir O. Popov, Jonathan R. Lloyd, David Knight, Mohamed Y. El-Naggar, Sahand Pirbadian, Kar Man Leung, Frank T. Robb, Maksim V. Zakhartsev, Orianna Bretschger, Elizaveta A. Bonch-Osmolovskaya, Elizaveta A. Bonch-Osmolovskaya   +16 more
doaj   +1 more source

High-Resolution Petrographic Evidence Confirming Detrital and Biogenic Magnetites as Remanence Carriers for Zongpu Carbonates in the Gamba Area, South Tibet

Frontiers in Earth Science, 2021
Paleocene carbonates from the Gamba area of South Tibet provide the largest paleomagnetic dataset for constraining the paleogeography of the India-Asia collision in the early stage.
Qian Zhao, Baochun Huang, Zhiyu Yi, Pengfei Xue   +3 more
doaj   +1 more source

Towards Bioleaching of a Vanadium Containing Magnetite for Metal Recovery

Frontiers in Microbiology, 2021
Vanadium – a transition metal – is found in the ferrous-ferric mineral, magnetite. Vanadium has many industrial applications, such as in the production of high-strength low-alloy steels, and its increasing global industrial consumption requires new ...
Sören Bellenberg, Stephanie Turner, Laura Seidel, Nathan van Wyk, Ruichi Zhang, Varvara Sachpazidou, Rodrigo F. Embile, Ingar Walder, Tiina Leiviskä, Mark Dopson   +9 more
doaj   +1 more source