Fe304 and Fe3S4 in a bacterium

  title={Fe304 and Fe3S4 in a bacterium},
  author={Dennis A. Bazylizinki and Brigid R. Heywood and Stephen Mann and Richard B. Frankel},
High Diversity of Magnetotactic Deltaproteobacteria in a Freshwater Niche
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
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
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
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.
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
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
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.


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
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.