Results 1 to 10 of about 146,771 (344)

The magnetite-based receptors in the beak of birds and their role in avian navigation [PDF]

open access: yes, 2012
Iron-rich structures have been described in the beak of homing pigeons, chickens and several species of migratory birds and interpreted as magnetoreceptors.
Wiltschko, Roswitha, Wiltschko, Wolfgang
core   +1 more source

Magnetite-boosted syntrophic conversion of acetate to methane during thermophilic anaerobic digestion

open access: yesWater Science and Technology
Using a batch thermophilic anaerobic system established with 60 mL serum bottles, the mechanism on how microbial enrichments obtained from magnetite-amended paddy soil via repeated batch cultivation affected methane production from acetate was ...
Zi-Fan Wu   +3 more
doaj   +1 more source

Selectivity of Malachite Green on Cationic Dye Mixtures Toward Adsorption on Magnetite Humic Acid

open access: yesEnvironment and Natural Resources Journal, 2022
Magnetite humic acid (MHA) was successfully synthesized by the coprecipitation method followed by hydrothermal process, as evidenced by the XRD, FTIR, VSM, and SEM analysis characterization results.
Nur Ahmad   +3 more
doaj   +1 more source

The identification and biogeochemical interpretation of fossil magnetotactic bacteria [PDF]

open access: yes, 2008
Magnetotactic bacteria, which most commonly live within the oxic-anoxic transition zone (OATZ) of aquatic environments, produce intracellular crystals of magnetic minerals, specifically magnetite or greigite.
Kirschvink, Joseph L., Kopp, Robert E.
core   +1 more source

Simulation of Porous Magnetite Deposits on Steam Generator Tubes in Circulating Water at 270 °C

open access: yesCrystals, 2020
In the secondary side of pressurized water reactors (PWRs), the main corrosion product accumulated on the steam generator (SG) tubes is magnetite, which has a porous structure. The purpose of this work is to simulate the porous magnetite deposited to the
Soon-Hyeok Jeon   +4 more
doaj   +1 more source

Microtextures and microintergrowths of irontitanium-aluminium oxide minerals in a magmatic tinaniferous iron ore from Attu island, southwestern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1977
Microtextures of coexisting magnetite, ilmenite and aluminous spinel and their chemical composition have been studied in a magmatic titaniferous iron ore from Attu Island in south-western Finland.
H. van Lamoen
doaj   +1 more source

Magnetosome vesicles are present before magnetite formation, and MamA is required for their activation [PDF]

open access: yes, 2004
Bacterial magnetosomes are intracellular compartments that house highly ordered magnetite crystals. By using Magnetospirillum sp. AMB-1 as a model system, we show that magnetosome vesicles exist in the absence of magnetite, biomineralization of magnetite
Beveridge, Terrance J.   +3 more
core  

Raman study of the Verwey transition in Magnetite at high-pressure and low-temperature; effect of Al doping

open access: yes, 2012
We report high-pressure low-temperature Raman studies of the Verwey transition in pure and Al-doped magnetite (Fe_3O_4). The low temperature phase of magnetite displays a number of additional Raman modes that serve as transition markers. These transition
A. Gavriliuk   +8 more
core   +1 more source

Nanocomposite Fe1xO=Fe3O4, Fe=Fe1xO thin films prepared by RF sputtering and revealed by magnetic coupling effects [PDF]

open access: yes, 2008
Magnetic and semi-conducting nanocomposite iron oxide thin films have been prepared under bias polarization, by radio-frequency sputtering of a magnetite target. The nature of the phases obtained in the thin films depends on the bias power density.
Bonningue, Corine   +3 more
core   +5 more sources

Silica Magnetite Adsorbent: Effect of Drying Temperature of Silica Sol Gel on Magnetite Core Structure

open access: yesJurnal Kimia Sains dan Aplikasi, 2018
Recently, magnetite was investigated as water purification adsorbent because it’s unique magnetic properties that improved the adsorption efficiency through desorption process.
Choiril Azmiyawati   +2 more
doaj   +1 more source

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