Wei Lin , Jinhua Li and Yongxin Pan Deltaproteobacteria in a Freshwater Niche High Diversity
High Diversity of Magnetotactic Deltaproteobacteria in a Freshwater Niche
- Environmental ScienceApplied and Environmental Microbiology
A high diversity of magnetotactic bacteria in a freshwater site is reported and some rod-shaped bacteria simultaneously synthesized greigite and magnetite magnetosomes.
Magnetic properties of sedimentary greigite (Fe3S4): An update
- Geology, Materials Science
Greigite (Fe3S4) is an authigenic ferrimagnetic mineral that grows as a precursor to pyrite during early diagenetic sedimentary sulfate reduction. It can also grow at any time when dissolved iron and…
Transmission electron microscopy study of magnetites in a freshwater population of magnetotactic bacteria
- Materials Science
Abstract A freshwater population of magnetotactic bacteria has been extracted from the Seine River (France) and studied using transmission electron microscopy. Seventeen different morphotypes were…
Controlled Biomineralization of Magnetite (Fe(inf3)O(inf4)) and Greigite (Fe(inf3)S(inf4)) in a Magnetotactic Bacterium
- Materials ScienceApplied and environmental microbiology
The results show that in some magnetotactic bacteria, external environmental conditions such as redox and/or oxygen or hydrogen sulfide concentrations may affect the composition of the nonmetal part of the magnetosome mineral phase.
Peptidoglycan as major binding motif for Uranium bioassociation on Magnetospirillum magneticum AMB-1 in contaminated waters.
- Biology, Environmental ScienceJournal of hazardous materials
Thermophilic Magnetotactic Bacteria from Mickey Hot Springs, an Arsenic-Rich Hydrothermal System in Oregon
- ACS Earth and Space Chemistry
Magnetotactic Bacteria and Magnetosomes: Basic Properties and Applications
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…
Isolation and cultivation of a novel sulfate-reducing magnetotactic bacterium belonging to the genus Desulfovibrio
- BiologyPloS one
The strain FSS-1 is a strict anaerobe and uses casamino acids as electron donors and sulfate as an electron acceptor to reduce sulfate to hydrogen sulfide and is considered to be a novel sulfate-reducing magnetotactic bacterium belonging to the genus Desulfovibrio.
Polycrystalline texture causes magnetic instability in greigite
- Materials ScienceScientific reports
This work uses ferromagnetic resonance (FMR) spectroscopy and static magnetization measurements in concert with micromagnetic simulations to detect and explain textural effects on the magnetic stability in synthetic, polycrystalline greigite flakes, and demonstrates that these effects stem from inter-grown crystallites with mean coherence length (MCL) of about 20 nm in single-domain magnetic state.
SHOWING 1-3 OF 3 REFERENCES
Multiple Evolutionary Origins of Magnetotaxis in Bacteria
Phylogenetic analyses of small subunit ribosomal RNA sequences showed that all known magnetotactic bacteria of the iron oxide type are associated with the a subgroup of the Proteobacteria in the domain Bacteria, and suggest that magnetotaxis based on iron oxides and iron sulfides evolved independently.
Electron microscopy study of magnetosomes in a cultured coccoid magnetotactic bacterium
- Materials ScienceProceedings of the Royal Society of London. Series B: Biological Sciences
Intracellular magnetite (Fe3O4) crystals produced by the magnetotactic bacterium MC-1 were analysed by transmission electron microscopy (TEM) and showed that the crystal morphology was controlled even at early stages of development.