Results 21 to 30 of about 80,984 (279)
Unexpected Magnetic Behavior of Natural Hematite‐Bearing Rocks at Low Temperatures
Geochemistry, Geophysics, Geosystems, 2021 Hematite is a commonly occurring magnetic mineral in nature that has numerous scientific and technological applications. A characteristic property of hematite is a low‐temperature spin‐flop transition called the Morin transition.
Alexandra Abrajevitch +3 more
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, 2015 Motility is a basic feature of living microorganisms, and how it works is often determined by environmental cues. Recent efforts have focused on develop- ing artificial systems that can mimic microorganisms, and in particular their self-propulsion. Here,
Abrahmian, Anais +7 more
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A revised scheme for the reactivity of iron (oxyhydr)oxide minerals towards dissolved sulfide [PDF]
, 2004 The reaction between dissolved sulfide and synthetic iron (oxyhydr)oxide minerals was studied in artificial seawater and 0.1 M NaCl at pH 7.5 and 25°C. Electron transfer between surface-complexed sulfide and solid phase Fe(III) results in the oxidation ...
Bartlett +77 more
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Thickness Dependent on Photocatalytic Activity of Hematite Thin Films
International Journal of Photoenergy, 2012 Hematite (Fe2O3) thin films with different thicknesses are fabricated by the rf magnetron sputtering deposition. The effects of film thicknesses on the photocatalytic activity of hematite films have been investigated.
Yen-Hua Chen, Kuo-Jui Tu
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Synthetic and natural iron oxide characterization through microparticle voltammetry [PDF]
, 2009 Se presentan los resultados de un estudio sobre el uso de la Voltametría de Micropartículas (VMP), aplicada a la identificación de óxidos y oxihidróxidos de hierro. Mediante esta técnica, fue posible diferenciar hematita, goethita, magnetita y maghemita,
Bidegain, Juan Carlos +2 more
core +3 more sources
Identifying Temperature and Moisture Controls on Fe Oxide Origins
Geophysical Research Letters, 2023 Magnetism, redness, and Fe oxides are indicators of pedoclimatic conditions. However, uncertainties with observing how Fe oxides form within soils has led to debates about relationships between magnetic mineral assemblages, temperature, and rainfall.
Christopher Lepre
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Low Temperature Oxidation of pure Iron : Growth kinetics and scale Morphologies [PDF]
, 2004 Isothermal oxidation of pure iron has been performed in air at atmospheric pressure between 260°C and 500°C. Growth kinetics are accurately analysed and scale morphologies are investigated by SEM and TEM observations. The calculation of the variations of
Bertrand, Nathalie +4 more
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Yankuang ceshi, 2017 The benchmark comparative price between global seaborne iron ore and Chinese domestic iron ore is based on free on board (FOB) or cost, insurance and freight (CIF), resulting in imprecise market pressure price estimation for Chinese domestic iron ore ...
WANG Wei-ping, CHEN Yu-chuan
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Nondestructive Raman investigation on wall paintings at Sala Vaccarini in Catania (Sicily) [PDF]
, 2016 In this work, the results of a Raman campaign for studying seventeenth-century Sicilian frescoes, by using two portable Raman systems, equipped with different excitation sources (785 and 1064 nm), are proposed.
Agostino, Giuseppe +10 more
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Effect of particle size on flotation separation of hematite and quartz
工程科学学报, 2020 Generally, the flotation performance of mineral particles in a wide size range is usually poor, which can be attributed to the high reagent consumptions and low floatability differences between valuable and gangue minerals. Classification flotation is an
Dong LI +6 more
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