Effect of elevated temperature on the magnetite and quartz …
Magnetite aggregates were used to produce heavyweight concrete, while quartz and sand were used to produce ordinary concrete. ... 500, and 800 °C …
Magnetite aggregates were used to produce heavyweight concrete, while quartz and sand were used to produce ordinary concrete. ... 500, and 800 °C …
Magnetite is a ubiquitous accessory mineral in magmatic sulfide assemblages and a common igneous phase in many related mafic rocks, with distinctive …
Bacteriostatic properties of medical textiles treated with nanomaterials based on Fe2O3, Mykola Riabchykov, Yuriy Sychov, Olexandr Alekszndrov, Anastasiia Nikulina
A multifunctional visual observation of magnetic ionic liquid (MIL) benzylctylammonium thiocyanatecobalt (II) [N 8,8,8,B +] 2 [Co(SCN) 4 2-] with the long-chain alkyl and benzyl group structures was designed and synthesized as microextraction phase.Designed new structural MIL displays good hydrophobicity, high extraction …
View a PDF of the paper titled Direct observation of localization in the minority-spin-band electrons of magnetite below the Verwey temperature, by H. Kobayashi and 7 other authors View PDF TeX Source
Magnetite Fe-ore tailings (pH ~9.5) were amended with 3% (w/w) BOM (Lucerne hay) and natural soil microbial communities and incubated for 68 days in a microcosm study. BOM amendment with soil inoculum resulted in a rapid neutralization of alkaline pH conditions in the tailings. ... Treatment effects were assessed by visual …
The observation that the 'fixed directions' depend on the ambient light regime was rather surprising, because one would not have expected magnetite-based receptors to be influenced by light. ... the specific directions seem to arise from interactions of these magnetite-based receptors with visual input that is processed in a non …
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To measure visual observation learning (VOL), we provided three items based on Parkins et al. [53]: (1) If I observe massive residential rooftop solar panels in my county, I would like to adopt it; (2) If I observe massive rooftop solar panels on public buildings in my county, I would like to adopt it; (3) If I observe solar photovoltaic ...
[1] The viscous behavior of multidomain magnetite has been directly observed in both natural and synthetic samples using Bitter pattern imaging. A computer …
Explore the fascinating world of rocks and their magnetic properties in this comprehensive article. Discover how mineral composition and environmental conditions shape these properties, revealing Earth's magnetic history and aiding in geological research. Learn about key minerals like magnetite and hematite, and their significance …
The visual observations confirmed that the addition of magnetite into the system resulted in a sizable deposition layer covering the surface. The friable nature of the surface coverage indicated that the deposit was not a densely packed layer.
Study with Quizlet and memorize flashcards containing terms like What are the main challenges involved in sending probes to the giant planets?, Why is it difficult to drop a probe like Galileo? How did engineers solve this problem?, Explain why visual observation of the gas giants is not sufficient to determine their rotation periods, and what evidence …
Although extensive experimental observations of magnetic hysteresis in sized particles of (nominally) magnetite have been made (e.g., Argyle & Dunlop, 1990; …
The magnetic susceptibility and Curie temperatures T c have been investigated for a series of synthetic samples with solid-solution compositions ranging from pure magnetite (Fe 3 O 4) to hercynite (FeAl 2 O 4).The determined T c can be fitted by a straight line, which also fits the theoretical values for these end-members. With increasing hercynite …
Dissolution of strongly magnetic minerals is a common and relatively rapid phenomenon in poorly drained soils of the central United States, resulting in low magnetic susceptibility (MS). Low Eh reducing conditions are primarily responsible for magnetic mineral dissolution; a process likely mediated by iron-reducing bacteria in the presence of soil organic matter.
Section snippets Experimental. A microfocus X-ray generating equipment (Fig. 1) was used to irradiate the cell (30×20×200 mm) that contained MF.Air bubble was introduced from a point 2 cm (z-direction) above the bottom of the cell and a nonuniform magnetic field (Fig. 2) was applied perpendicular to the movement of the air bubble.In …
Evolution of microstructures in magnetite-based ferrofluids with weak dipolar moments (particle size ≤ 10 nm) is studied with an emphasis on examining the effects of particle concentration (ϕ) and magnetic field strength (H) on the structures.Nanoparticles are dispersed in water at three different concentrations, ϕ = 0.15%, 0.48%, and 0.59% …
Biological motion observation has been recognized to produce dynamic change in sensorimotor activation according to the observed kinematics. Physical plausibility of the spatial-kinematic relationship of human movement may play a major role in the top-down processing of human motion recognition. Here, we investigated the time course of scalp …
The thermal demagnetization of pseudo‐single‐domain (PSD) magnetite (Fe 3 O 4) particles, which govern the magnetic signal in many igneous rocks, is examined using off‐axis electron holography.Visualization of a vortex structure held by an individual Fe 3 O 4 particle (~250 nm in diameter) during in situ heating is achieved through the …
Macro visual observation showed the rupture like a fish mouth with slag adhering at the outer surface of the tube. Magnetite as a protective layer was peeled off. Changes in the thickness were analyzed through dimensional measurement. In this research, an analysis to find the cause and determine the fracture mechanism is …
In addition, atomic force microscope (AFM) was used to provide direct visual observations of interactions of HA and Fe 3 O 4 particles, which provided confirmation of the observed HA effects on NP aggregation. 2. Materials and experimental methods2.1. Synthesis and characterization of magnetite NPs
Direct observation of the thermal demagnetization of magnetic vortex structures in nonideal magnetite recorders Trevor P. Almeida1,2, Adrian R. Muxworthy1, András Kovács3, Wyn Williams 4, Leslei Nagy, Pádraig Ó Conbhuí4, Cathrine Frandsen5, Radchagrit Supakulopas1, and Rafal E. Dunin-Borkowski3 1Department of Earth …
Visual Observation. Visual observation is 'direct' allowing researchers to witness the behaviour firsthand in its natural setting. However, numerous studies reveal that visual observation techniques have rarely been …
The images confirmed that the direct visual observation was achieved; these were then employed to provide detailed information of the nucleation, growth, and decomposition of the hydrate. Moreover, the saturation of methane hydrate during the dissociation was obtained from the MRI intensity data. Our results showed that the hydrate saturation ...
The colorimetric change can be determined either by visual observation or with a reader, allowing for a simple, rapid quantification of E. coli in resource-limited settings. Publication types Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. MeSH terms Bacteriophage T7 / chemistry* ... Magnetite …
The paper studied the influence of metakaolin and boron carbide additives on the thermal, mechanical and microstructural properties of magnetite, basalt and …
Magnetite nanoparticles (MNPs) were produced via the thermal decomposition process of iron oleate precursor due to monodispersity provided by this method. The particles were coated with mesoporous silica layers by utilizing cetyltrimethylammonium bromide (CTAB) as the surfactant. ... It was evident from the …
VISUAL OBSERVATION OF EMISSION COLORS OF SOME ALKALI METALS OBJECTIVES. To find out colors emitted by the elements lithium, sodium, potassium and calcium; INTRODUCTION. A flame test is an analytical procedure used in chemistry to detect the presence of certain elements, primarily metal ions, based on each element's …
The entrainment of fine quartz particles into magnetite coagulates in a uniform magnetic field was studied through in situ observation using a video microscope.
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