Results 31 to 40 of about 748 (152)

Magnetotactic Bacteria from Extreme Environments

Life, 2013
Magnetotactic bacteria (MTB) represent a diverse collection of motile prokaryotes that biomineralize intracellular, membrane-bounded, tens-of-nanometer-sized crystals of a magnetic mineral called magnetosomes.
Christopher T. Lefèvre, Dennis A. Bazylinski   +1 more
doaj   +1 more source

Complicated Magnetic Mineral Assemblages in Marine Sediments Offshore of Southwestern Taiwan: Possible Influence of Methane Flux on the Early Diagenetic Process

Terrestrial, Atmospheric and Oceanic Sciences, 2006
In this paper, we present the results of down core variations in magnetic susceptibility and magnetic mineral composition of fifteen piston cores retrieved from the active continental margin offshore of southwestern Taiwan, where a wide distribution of ...
Chorng-Shern Horng Kuo-Hang Chen
doaj   +1 more source

A greigite-based magnetostratigraphic time frame for the Late Miocene to Recent DSDP Leg 42B cores from the Black Sea

Frontiers in Earth Science, 2016
Throughout the Late Neogene, the Black Sea experienced large paleoenvironmental changes, switching between (anoxic) marine conditions when connected to the Mediterranean Sea and (oxic) freshwater conditions at times of isolation.
Christiaan Gijsbert Cornelis Van Baak, Iuliana eVasiliev, Dan Valentin Palcu, Mark Jacobus Dekkers, Wout eKrijgsman   +4 more
doaj   +1 more source

Formation of Core-Shell Nanoparticles Composed of Magnetite and Samarium Oxide in Magnetospirillum magneticum Strain RSS-1. [PDF]

PLoS ONE, 2017
Magnetotactic bacteria (MTB) synthesize magnetosomes composed of membrane-enveloped magnetite (Fe3O4) or greigite (Fe3S4) particles in the cells. Recently, several studies have shown some possibilities of controlling the biomineralization process and ...
Hirokazu Shimoshige, Yoshikata Nakajima, Hideki Kobayashi, Keiichi Yanagisawa, Yutaka Nagaoka, Shigeru Shimamura, Toru Mizuki, Akira Inoue, Toru Maekawa   +8 more
doaj   +1 more source

Magnetic Biosignatures of Magnetosomal Greigite From Micromagnetic Calculation

Geophysical Research Letters, 2022
AbstractGreigite magnetosomes produced by magnetotactic bacteria (MTB) are widely distributed in natural environments, but large uncertainties remain regarding their magnetic biosignatures. Here, we have constructed micromagnetic models with realistic biogenic greigite particles to quantify the magnetic properties and magnetotaxis efficiency of ...
Fan Bai, Liao Chang, Zhaowen Pei, Richard J. Harrison, Michael Winklhofer   +4 more
openaire   +2 more sources

Magnetotactic Bacteria and Magnetosomes: Basic Properties and Applications

Magnetochemistry, 2021
Magnetotactic bacteria (MTB) belong to several phyla. This class of microorganisms exhibits the ability of magneto-aerotaxis. MTB synthesize biominerals in organelle-like structures called magnetosomes, which contain single-domain crystals of magnetite ...
Kamil G. Gareev, Denis S. Grouzdev, Petr V. Kharitonskii, Andrei Kosterov, Veronika V. Koziaeva, Elena S. Sergienko, Maxim A. Shevtsov   +6 more
doaj   +1 more source

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   +1 more source

Rapid Identification of Greigite in Lacustrine Sediments Using SIRM/χ and χARM: Insights From the Cuo E Core, Tibetan Plateau, China

Earth and Space Science
The Cuo E (CE) core contains the entire Quaternary stratigraphy of the CE Lake (31°24′–31°.32′ N, 91°28′–91°33′E, Tibetan Plateau, China). Here, we study the magnetic properties of 1,748 samples from the CE core, combined with scanning electron ...
Shengchang Ding, Mark J. Dekkers, Mingkun Li, Qi Zhao, Yi Yan, Zhaoyu Zhu   +5 more
doaj   +1 more source

Fe3O4@MoS2/MoO3/rGO Nanocomposite for Ammonia Gas‐Sensing at Room Temperature

Advanced Sensor Research, Volume 5, Issue 2, February 2026.
Nanocomposite synthesized via scalable hydrothermal‐coprecipitation route. High NH3 sensitivity and selectivity achieved at room temperature. Resistance modulation driven by depletion region at heterostructure interfaces. Stable sensor response and reversible recovery after repeated gas exposure.
Abdul Selim, Michal Jakl, Martin Mergl, Tereza Václavů, Jan Plšek, Martin Kalbáč   +5 more
wiley   +1 more source

Ferrimagnetic minerals as possible indicators of the sedimentation environments of the Eastern Paratethys Tarkhanian deposits (Kop-Takyl section)

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2022
The paper presents the results of studies of ferromagnetic minerals and their distribution in the Tarkhanian and transition Tarkhanian-Chokrakian deposits of the Kop-Takyl section (Kerch Peninsula, Eastern Paratethys).
Пилипенко О.В., Ростовцева Ю.В., Сальная Н.В.   +2 more
doaj   +1 more source