Results 41 to 50 of about 748 (152)
Bioinspired greigite magnetic nanocrystals: chemical synthesis and biomedicine applications [PDF]
Scientific Reports, 2013 Large scale greigite with uniform dimensions has stimulated significant demands for applications such as hyperthermia, photovoltaics, medicine and cell separation, etc. However, the inhomogeneity and hydrophobicity for most of the as prepared greigite crystals has limited their applications in biomedicine.
Mei Feng +8 more
openaire +2 more sources
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.Abstract We present the first micromagnetic simulations for sub‐micron monoclinic 4C pyrrhotite (Fe7S8 ${\text{Fe}}_{7}{\mathrm{S}}_{8}$), a common mineral in rocks and sediments and an important mineral in paleomagnetic studies. Previous experimental studies on the magnetic properties of pyrrhotite had limited control over granulometry and focused ...
Wyn Williams +6 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, 2018 Dating of upper Miocene sediments of the Pannonian Basin (Hungary) has proven difficult due to the endemic nature of biota, scarcity of reliable radio isotopic data, and generally inconsistent magnetostratigraphic results.
Nick A. Kelder +7 more
doaj +1 more source
Improved methods for mass production of magnetosomes and applications: a review
Microbial Cell Factories, 2020 Magnetotactic bacteria have the unique ability to synthesize magnetosomes (nano-sized magnetite or greigite crystals arranged in chain-like structures) in a variety of shapes and sizes.
Abdul Basit +4 more
doaj +1 more source
Greigite and the magnetic properties of sediments [PDF]
Limnology and Oceanography, 1990 X‐ray diffraction spectra of freeze‐dried sediments from a lake in the English Lake District positively identified the presence of greigite, a magnetic iron sulfide (Fe3S4) mineral. The sediments also show considerable loss of magnetic intensity when wet samples are allowed to oxidize.
openaire +1 more source
Facies analysis provides new insights into event bed deposition in a hadal trench environment
Sedimentology, Volume 73, Issue 2, Page 441-477, February 2026.ABSTRACT Hadal trenches preserve exceptional sedimentary archives of past geological events, yet their depositional processes remain poorly constrained. The Japan Trench captures complex earthquake‐triggered event beds that record repeated sediment‐gravity flows that deliver terrigenous and biogenic material into the trench, informing palaeoseismic ...
Mishelle Muthre +6 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, 2014 Inconsistent polarity patterns in sediments are a common problem in magnetostratigraphic and paleomagnetic research. Multiple magnetic mineral generations result in such remanence “haystacks.” Here we test whether end‐member modeling of isothermal ...
F. M. Aben +8 more
doaj +1 more source
Geoarchaeological Investigation of Early Neolithic Lagoonal Fringe Landscapes in the Netherlands
Geoarchaeology, Volume 41, Issue 1, January/February 2026.ABSTRACT Coastal wetlands have historically been portrayed as too marginal for early crop cultivation during the Mesolithic–Neolithic transition due to their dynamic hydrology, low elevation, and poor drainage. However, growing evidence suggests that these environments played a crucial role in the spread of agriculture. We examined buried and submerged
Elena Familetto +5 more
wiley +1 more source
Sedimentary Greigite Formation
American Journal of ScienceRevised thermodynamic data for greigite (Fe3S4) indicate that it is a stable sedimentary Fe-S phase. Greigite was previously regarded as metastable. Equilibrium computations using revised data explain apparently contradictory observations regarding greigite occurrences in sediments and sedimentary rocks.
David Rickard +2 more
openaire +1 more source
The Role of Fe(II) Minerals in Carbon Stabilization in Coastal and Estuarine Anoxic Environments
Global Biogeochemical Cycles, Volume 40, Issue 1, January 2026.Abstract Fe(III) (oxyhydr)oxides are well‐known for their role in organic carbon (OC) stabilization in terrestrial soils. Coastal and estuarine soils typically act as iron sinks and receive a high input of OC. However, tidal submersion induces anoxic and reducing conditions that favor the microbial reductive dissolution of Fe(III) (oxyhydr)oxides ...
Jan Jagode +2 more
wiley +1 more source