Results 31 to 40 of about 2,338 (195)

Ferromagnetic Resonance Spectroscopy and Rock Magnetic Characterization of Fossil Coral Skeletons in Ishigaki Islands, Japan

Geosciences, 2018
Skeletons of hermatypic corals (e.g., Porites) might have enormous potential as a high-resolution paleomagnetic recorder owing to their rapid and continuous growth over hundreds of years at a rate of up to 2 cm/year, although typical corals show an ...
Yuho Kumagai, Norihiro Nakamura, Tetsuro Sato, Toshitaka Oka, Hirokuni Oda   +4 more
doaj   +1 more source

Dating North Pacific Abyssal Sediments by Geomagnetic Paleointensity: Implications of Magnetization Carriers, Plio-Pleistocene Climate Change, and Benthic Redox Conditions

Frontiers in Earth Science, 2021
Non-carbonaceous abyssal fine-grained sediments cover vast parts of the North Pacific’s deep oceanic basins and gain increasing interests as glacial carbon traps.
Wanzhang Wang, Tilo von Dobeneck, Thomas Frederichs, Yang Zhang, Lester Lembke-Jene, Ralf Tiedemann, Michael Winklhofer, Dirk Nürnberg   +7 more
doaj   +1 more source

Critical single-domain/multidomain grain sizes in noninteracting and interacting elongated magnetite particles: Implications for magnetosomes [PDF]

, 2006
The critical size for stable single-domain (SD) behavior has been calculated as a function of grain elongation for magnetite grains using a numerical micromagnetic algorithm.
Muxworthy, Adrian R., Williams, Wyn; id_orcid   +1 more
core   +1 more source

The Identification and Interpretation of Microbial Biogeomagnetism [PDF]

, 2007
Microbial activity plays a major role in the sedimentary iron cycle. Some microbes gain energy by reducing or oxidizing iron and thus induce changes in the sedimentary iron mineral assemblage.
Kopp, Robert Evans, III
core   +1 more source

Why Does Not Nanotechnology Go Green? Bioprocess Simulation and Economics for Bacterial-Origin Magnetite Nanoparticles

Frontiers in Microbiology, 2021
Nanotechnological developments, including fabrication and use of magnetic nanomaterials, are growing at a fast pace. Magnetic nanoparticles are exciting tools for use in healthcare, biological sensors, and environmental remediation. Due to better control
Tarcisio Correa, Rogério Presciliano, Fernanda Abreu   +2 more
doaj   +1 more source

Controlled biomineralization of magnetite (Fe₃O₄) by Magnetospirillum gryphiswaldense [PDF]

, 2008
Results from a study of the chemical composition and micro-structural characteristics of bacterial magnetosomes extracted from the magnetotactic bacterial strain Magnetospirillum gryphiswaldense are presented here.
Tobler, D.J., Tobler, Dominique, Bonneville, S., Benning, Liane G, Moisescu, C., Ardelean, I, Benning, L.G., Moisescu, Cristina, Ardelean, I., Bonneville, Steeve   +9 more
core   +1 more source

Relationships between Abyssal Redox Conditions and Rock Magnetic Properties of Surficial Sediments in the Western Pacific

Journal of Marine Science and Engineering, 2023
Reconstructing changes in deep/bottom-water redox conditions are critical for understanding the role of the deep ocean in global carbon and metals cycling; nevertheless, the quantitative relationships between redox proxies and abyssal dissolved oxygen ...
Yanping Chen, Dong Xu, Huafeng Qin, Geng Liu, Yibing Li, Weiwei Chen, Liang Yi   +6 more
doaj   +1 more source

Functional analysis of the magnetosome island in Magnetospirillum gryphiswaldense: the mamAB operon is sufficient for magnetite biomineralization [PDF]

, 2011
Bacterial magnetosomes are membrane-enveloped, nanometer-sized crystals of magnetite, which serve for magnetotactic navigation. All genes implicated in the synthesis of these organelles are located in a conserved genomic magnetosome island (MAI).
Voigt Birgit, Losse, A., Richter, M., Katzmann, E., Lohße Anna, Michael Richter, Richter, Michael, Emanuel Katzmann, Ullrich, Susanne, Birgit Voigt, Wanner, G., Katzmann, Emanuel, Borg, Sarah, Lohsse, Anna, Gerd Wanner, Ullrich, S., Wanner Gerd, Ullrich Susanne, Schweder, Thomas, Voigt, Birgit, Dirk Schüler, Schweder Thomas, Richter Michael, Sarah Borg, Wanner, Gerd, Susanne Ullrich, Borg Sarah, Schweder, T., Schüler, Dirk, Schüler Dirk, Voigt, B., Katzmann Emanuel, Borg, S., Thomas Schweder, Schueler, D., Anna Lohsse   +35 more
core   +1 more source

Fe(III) (oxyhydr)oxide reduction by the thermophilic iron-reducing bacterium Desulfovulcanus ferrireducens

Frontiers in Microbiology, 2023
Some thermophilic bacteria from deep-sea hydrothermal vents grow by dissimilatory iron reduction, but our understanding of their biogenic mineral transformations is nascent.
Elizabeth C. Sklute, Elizabeth C. Sklute, Deborah A. Leopo, Kaylee A. Neat, Kenneth J. T. Livi, M. Darby Dyar, M. Darby Dyar, James F. Holden   +7 more
doaj   +1 more source

Safety Implications of High-Field MRI: Actuation of Endogenous Magnetic Iron Oxides in the Human Body [PDF]

, 2009
Background: Magnetic Resonance Imaging scanners have become ubiquitous in hospitals and high-field systems (greater than 3 Tesla) are becoming increasingly common.
Garcia-Prieto, A, Ana Garcia-Prieto, Jon Dobson, Dobson Jon, Bowtell, R, Pankhurst Quentin, Dobson, J, Richard Bowtell, Quentin Pankhurst, Pankhurst, Q, Bowtell Richard, Garcia-Prieto Ana   +11 more
core   +1 more source