Results 11 to 20 of about 37,522 (289)

Hematite. Processing and Applications [PDF]

open access: yesThe Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2019
In the paper are shown the history, processing and applications of hematite. Hematite is an oxide of iron having the composition Fe2O3. Pure hematite, also called “red ore” contains 70% Fe.
Mircea DOBRESCU, Marius VASILESCU
doaj   +2 more sources

Interactions of molybdenum and vanadium with iron nanoparticles [PDF]

open access: yes, 2010
Molybdenum, vanadium and iron are important micro and macro nutrients, respectively, for all living organisms. Their cycles and budgets in the natural environment is affected by - and affects many different processes.
Brinza, Loredana
core   +7 more sources

Metal Oxides Catalyze Formation of Dehydroamino Acids by Phosphate β-Elimination Under Physiological Conditions. [PDF]

open access: yesAngew Chem Int Ed Engl
Dehydroamino acids (DHAA) are atypical electrophilic sites that lead to crosslinked proteins in Alzheimer's disease (AD) brains. No catalyst for their formation has been known in humans. We report that metal oxides catalyze β‐elimination of phosphoserine and phosphothreonine in model peptides at pH 7.5°C and 37°C, yielding DHAAs.
Markovich SW   +3 more
europepmc   +3 more sources

Decontamination of spent ion exchange resins contaminated with iron-oxide deposits using mineral acid solutions

open access: yesNuclear Engineering and Technology, 2021
The efficiency of decontamination of model spent ion exchange resins, contaminated with magnetite and hematite, with mineral acid solutions, and using electro-decontamination, was evaluated. It has been shown that effective hematite dissolution occurs in
E.A. Tokar   +4 more
doaj   +1 more source

Photoelectrochemical detection of calcium ions based on hematite nanorod sensor substrates [PDF]

open access: yes, 2022
α-Fe2O3 (hematite) thin films have been shown to be a robust sensor substrate for photoelectrochemical imaging with good stability and high spatial resolution.
Anirban, Das   +7 more
core   +1 more source

Organic Matter Inhibits Redox Activity and Impacts Heterogeneous Growth of Iron (Oxyhydr)oxides on Nano-Hematite

open access: yes, 2022
Oxidative mineral growth of goethite (α-FeOOH) on hematite (α-Fe2O3) nanoparticles during the oxidation of adsorbed Fe­(II) is thermodynamically controlled by mineral surface characteristics and solution conditions.
Kathryn K. Hobart   +15 more
core   +1 more source

Hematite (α-Fe2O3) quantification in sedimentary magnetism: limitations of existing proxies and ways forward

open access: yesGeoscience Letters, 2020
Determination of hematite contributions to sedimentary magnetizations is an important but difficult task in quantitative environmental studies. The poorly crystalline and fine-grained nature of hematite nanoparticles makes quantification of their ...
Andrew P. Roberts   +8 more
doaj   +1 more source

Quantifying Soil Goethite/Hematite Ratios: A New Method Based on Diffuse Reflectance Spectra

open access: yesGeophysical Research Letters, 2023
Goethite/hematite ratios in soils are widely used to reconstruct past climatic changes, but their accurate measurements have remained challenging due to the matrix effect.
Xianqiang Meng   +4 more
doaj   +1 more source

Identifying the Spectroelectrochemical Characteristics of Hematite Photoanodes for Water Oxidation [PDF]

open access: yes, 2021
Achieving efficient solar water splitting using hematite (α-Fe2O3), one of the most promising candidates for photoanodes, requires photogenerated holes to be efficiently used for water oxidation.
Yuegang, Zhang   +4 more
core   +1 more source

Influence of surface morphology on the immersion mode ice nucleation efficiency of hematite particles [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
In this paper, the effect of the morphological modification of aerosol particles with respect to heterogeneous ice nucleation is comprehensively investigated for laboratory-generated hematite particles as a model substrate for atmospheric dust particles.
N. Hiranuma   +7 more
doaj   +1 more source

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