Results 21 to 30 of about 2,338 (195)

Nitrate removal during Fe(III) bio-reduction in microbial-mediated iron redox cycling systems

Water Science and Technology, 2021
Fe(III) bio-reduction provides a prospect of applying the iron redox cycle to nitrate remediation in the aquatic environment. The objective of this study was to realize multiple nitrate removals in the system containing Shewanella oneidensis MR-1 (S ...
Yongsheng Lu, Hui Liu, Xueer Huang, Lu Xu, Jizhi Zhou, Guangren Qian, Jupei Shen, Xueping Chen   +7 more
doaj   +1 more source

Non‐Chained, Non‐Interacting, Stable Single‐Domain Magnetite Octahedra in Deep‐Sea Red Clay: A New Type of Magnetofossil?

Geochemistry, Geophysics, Geosystems, 2021
Magnetic detection and classification of magnetofossils have been proposed as potential tools for paleoenvironmental studies. Magnetosomes in bacterial species living in different environmental conditions exhibit different grain morphologies and chain ...
Yoichi Usui, Toshitsugu Yamazaki
doaj   +1 more source

Biophysical evidence that frostbite is triggered on nanocrystals of biogenic magnetite in garlic cloves (Allium sativum). [PDF]

Commun Biol
Trace levels of biologically precipitated magnetite (Fe3O4) nanocrystals are present in the tissues of many living organisms, including those of plants.
Kobayashi A, Tanaka D, Hidaka H, Sakurai K, Kawai K, Kato T, Kihara K, Kirschvink JL.   +7 more
europepmc   +2 more sources

New Phenotype and Mineralization of Biogenic Iron Oxide in Magnetotactic Bacteria

Nanomaterials, 2021
Many magnetotactic bacteria (MTB) biomineralize magnetite crystals that nucleate and grow inside intracellular membranous vesicles originating from invaginations of the cytoplasmic membrane.
Walid Baaziz, Corneliu Ghica, Jefferson Cypriano, Fernanda Abreu, Karine Anselme, Ovidiu Ersen, Marcos Farina, Jacques Werckmann   +7 more
doaj   +1 more source

Magnetic vector tomography reveals giant magnetofossils are optimised for magnetointensity reception. [PDF]

Commun Earth Environ
Giant magnetofossils are unusual, micron-sized biogenic magnetite particles found in sediments dating back at least 97 million years. Their distinctive morphologies are the product of biologically controlled mineralisation, yet the identity of their ...
Harrison RJ, Neethirajan J, Pei Z, Xue P, Marcano L, Abrudan R, Ringe E, Tung PY, Kuppili VSC, Kaulich B, Daurer BJ, Hurtarte LCC, Kazemian M, Chang L, Donnelly C, Valencia S.   +15 more
europepmc   +2 more sources

Investigating Nanoscale Electron Transfer Processes at the Cell-Mineral Interface in Cobalt-Doped Ferrihydrite Using Geobacter sulfurreducens: A Multi-Technique Approach

Frontiers in Earth Science, 2022
Cobalt is an essential element for life and plays a crucial role in supporting the drive to clean energy, due to its importance in rechargeable batteries.
Dawn M. Buchanan, Laura Newsome, Jonathan R. Lloyd, Majid Kazemian, Burkhard Kaulich, Tohru Araki, Heath Bagshaw, John Waters, Gerrit van der Laan, Alpha N’Diaye, Victoria S. Coker   +10 more
doaj   +1 more source

Influence of Magnetofossils on Paleointensity Estimations Inferred From Principal Component Analyses of First‐Order Reversal Curve Diagrams for Sediments From the Western Equatorial Pacific

Geochemistry, Geophysics, Geosystems, 2021
Relative abundance of magnetite originated from magnetotactic bacteria (magnetofossils) in sediments may influence relative paleointensity (RPI) estimations of the geomagnetic field, as some studies reported an inverse correlation between RPI and the ...
Kosuke Inoue, Toshitsugu Yamazaki, Yoichi Usui   +2 more
doaj   +1 more source

Magnetic Properties and Initiation of Biogenic Reefs in Xisha Islands, South China Sea, at the Oligo–Miocene Boundary

Journal of Marine Science and Engineering, 2021
Biogenic reefs and carbonate platforms are valuable natural resources, playing an important role in modulating the global climate and in carbon cycles through biological processes. Biogenic reefs in the Xisha (Paracel) Islands began in the late Oligocene
Yibing Li, Xinyu Liu, Weiwei Chen, Liang Yi   +3 more
doaj   +1 more source

Characterization and Quantification of Magnetofossils Within Abyssal Manganese Nodules From the Western Pacific Ocean and Implications for Nodule Formation

Geochemistry, Geophysics, Geosystems, 2020
Abyssal manganese nodules have been explored widely for their economic potential and paleoenvironmental significance. Debate about whether biogenic or physical‐chemical processes are responsible for their formation remains because of difficulties in ...
X. D. Jiang, X. Zhao, Y. M. Chou, Q. S. Liu, A. P. Roberts, J. B. Ren, X. M. Sun, J. H. Li, X. Tang, X. Y. Zhao, C. C. Wang   +10 more
doaj   +1 more source

Magnetic force microscopy of atherosclerotic plaque [PDF]

Medičnì Perspektivi, 2014
In this work by methods of scanning probe microscopy, namely by atomic force microscopy and magnetic force microscopy the fragments of atherosclerotic plaque section of different nature were investigated.
Alexeeva T.A., Gorobets S.V., Gorobets O.Yu., Demianenko I.V., Lazarenko O.M.   +4 more
doaj   +3 more sources