In situ observation of quartz particles entrained into magnetite
Section snippets Materials. The magnetite concentrate sample was collected from the Peña Colorada concentrate plant in Colima state, Mexico. Only the size fraction of −25 + 20 μm was used in this work.The sample assayed 67.5% Fe and 2.7% SiO 2, respectively.The water used in this work was distilled first, and then passed through a …Web
اقرأ أكثرBuoyancy driven magnetohydrodynamic hybrid nanofluid flow …
Shahsavar et al. [29] analyzed the irreversibilities of water-magnetite/CNT flow within the eccentric annulus and noticed that Rayleigh numbers and nanoparticle concentration amplify the hear transportation. Related circular convective nanofluid flows are traced in [[30], [31], [32]].Web
اقرأ أكثر(PDF) Imaging the Magnetization of Single Magnetite …
Circular dichroism (CD) is a standard method for the analysis of biomolecular conformation. It is very reliable when applied to molecules, but requires relatively large amounts of solution.Web
اقرأ أكثرHuman Brains Have Tiny Bits of Magnetic Material
A further mystery is how magnetite arrives in the brain in the first place: One study of the frontal cortex of 37 human brains suggests that we breathe in magnetite from the environment. But other ...Web
اقرأ أكثرShape-Controlled Syntheses of Magnetite Microparticles and
Here, we presented a method for the shape-controlled synthesis of magnetite (Fe 3 O 4) microparticles and investigated the MR effects of two suspensions prepared from the two shape-controlled samples of Fe 3 O 4 microparticles. Our method, which was based on the polyol method, enabled the preparation of spherical and octahedral Fe 3 O 4 ...Web
اقرأ أكثرDiscrimination of biogenic and detrital magnetite through a double
Magnetite occurs widely in natural environments in both inorganic and biogenic forms. Discrimination of the origin of magnetite has important implications, from searching for past microbial activity to interpreting paleomagnetic and environmental magnetic records in a wide range of settings. ... Synchrotron-based X-ray magnetic …Web
اقرأ أكثرApplication of magnetic nanoparticles in nucleic acid detection
Nucleic acid is the main material for storing, copying, and transmitting genetic information. Gene sequencing is of great significance in DNA damage research, gene therapy, mutation analysis, bacterial infection, drug development, and clinical diagnosis. Gene detection has a wide range of applications, such as environmental, biomedical, …Web
اقرأ أكثرAn X-ray magnetic circular dichroism (XMCD) study of Fe …
@article{osti_1601835, title = {An X-ray magnetic circular dichroism (XMCD) study of Fe ordering in a synthetic MgAl2O4 – Fe3O4 (spinel – magnetite) solid solution series; implications for magnetic properties and cation site ordering}, author = {Henderson, C. Michael B. and Pearce, Carolyn I. and Charnock, John M. and Charnock, John M. and …Web
اقرأ أكثرA Novel Pneumatic Planar Magnetic Separator for Magnetite
In our previous studies, we investigated the performance of a novel pneumatic planar magnetic separator (PMS) for the dry beneficiation of a selected magnetite ore. In the present study, we have extended the studies on the PMS with the focus on investigating how various PMS processing flowsheet configurations influence its …Web
اقرأ أكثرTuning properties of biomimetic magnetic nanoparticles by
Magnetotactic bacteria form an ubiquitous and heterogeneous group of prokaryotic microorganisms that possess an unique organelle, the magnetosome, formed by a magnetic mineral [magnetite (Fe 3 O 4 ...Web
اقرأ أكثر[PDF] Magnetization Switching of Single Magnetite Nanoparticles
Here, we push the sensitivity of photothermal magnetic circular dichroism down to individual 20-nm magnetite nanoparticles. Single-particle magnetization curves display superparamagnetic to ferromagnetic behaviors, depending on size, shape, and orientation. Some nanoparticles undergo thermally activated switching on time scales of …Web
اقرأ أكثرChiral Nematic Cellulose Nanocrystals-Magnetite Nanocomposite Films
Chiral Nematic Cellulose Nanocrystals-Magnetite Nanocomposite Films Displaying Magnet-modulated Circular Dichroism Activity Download PDF. Ping Li 1, Xu Yu 2 & Yan Xu 1 133 ... A Practical Guide to Magnetic Circular Dichroism Spectroscopy, John Wiley & Sons, New York, 2007.Web
اقرأ أكثرMagnetic and electronic properties of magnetite …
At ambient conditions magnetite crystallizes in the inverse spinel cubic structure (Fig. 1 ), containing Fe 3+ ions in the sites with …Web
اقرأ أكثرImaging the Magnetization of Single Magnetite Nanoparticle …
versatile magnetic imaging technique using visible light. Unlike most magnetic imaging techniques, photothermal magnetic circular dichroism (PT MCD) …Web
اقرأ أكثرMagnetic and electronic properties of magnetite …
Magnetite is the most oldest known magnetic mineral, playing important role in natural life and development of technological applications. Starting from the utilization in ancient compasses for ...Web
اقرأ أكثرMagnetotactic bacteria form magnetite from a phosphate-rich …
The iron oxide mineral magnetite (Fe3O4) is produced by various organisms to exploit magnetic and mechanical properties. ... On the basis of X-ray circular magnetic dichroism, hematite (α-Fe 2 O 3) was found as a precursor to magnetite in the same bacterial strain and was suggested to represent an outer layer around the nascent …Web
اقرأ أكثرNovel Pressure-Induced Magnetic Transition in Magnetite …
Fe K-edge x-ray magnetic circular dichroism of magnetite (Fe 3O 4) powders was measured with synchrotron radiation under variable pressure and temperature conditions in diamond anvil cell. The magnetic dichroism was observed to decrease discontinuously by 50% between 12 and 16 GPa, independent of temperature.Web
اقرأ أكثرSpin-dependent optical charge transfer in magnetite from …
In this study, we demonstrate that optical magnetic circular dichroism (OMCD) in Faraday geometry can serve as an effective means of characterizing the …Web
اقرأ أكثرTwo-phase analysis of heat transfer and entropy generation of …
The purpose of the present experimental study is to investigate the forced magneto-convection of the Fe 3 O 4 /H 2 O ferrofluid flowing along smooth and dimpled tubes implemented with alternating magnetic field (B = 0.16 T and f = 5 Hz). All experiments were carried out for the working fluids pure water and ferrofluid with 1.0% volume fraction …Web
اقرأ أكثرControl of Earth-like magnetic fields on the transformation of
Roberts, A. P. et al. Searching for single domain magnetite in the 'pseudo-single-domain' sedimentary haystack: implications of biogenic magnetite preservation for sediment magnetism and ...Web
اقرأ أكثرX-ray magnetic circular dichroism study of epitaxial magnetite
The spin and orbital magnetic moments of the Fe 3 O 4 epitaxial ultrathin film synthesized by plasma assisted simultaneous oxidization on MgO(100) have been …Web
اقرأ أكثرBeneficiation of acid mine drainage (AMD): A viable option for the
Goethite (FeO(OH)), hematite (Fe 2 O 3), and magnetite (Fe 3 O 4) are commercially valuable minerals which can be synthesized using Fe-rich salts or are formed naturally by geological processes (Akinwekomi et al., 2017, Duuring et al., 2018, Ali et al., 2016). These minerals are used in a number of fields (biomedicine, agriculture, and ...Web
اقرأ أكثرMinerals | Free Full-Text | Titaniferous-Vanadiferous, Magnetite
Titanium or vanadium metals or their alloys are important industrial metals/alloys. Because these resources are in short supply, the investigation of potential titaniferous-vanadiferous deposits needs special attention to bridge the supply-demand gap. The study integrates geological, geochemical, remote sensing, and geophysical data for …Web
اقرأ أكثرMagnetite
Magnetite. 54–56 Nanomagnetite-supported in the field of heterogeneous catalysts are established as a multipurpose materials for heterogeneous catalysis field for fulfillment separation and recycling of costly and rare catalysts at the wide scale of usage. ... Not only small-molecule, circular polarization of light can also be used as a ...Web
اقرأ أكثرMagnetic circular dichroism in Fe 2p resonant photoemission of magnetite
Measurements of magnetic circular dichroism in Fe 2p resonant photoemission and calculations based on a full-multiplet cluster model reveal the parameters of the electronic structure of Fe3O4. We ...Web
اقرأ أكثرMechanical Characteristics of Magnetite Particles in Three …
The essence of particle motion is stress, and different stress is the reason for different particle motion trajectories. Based on this theory, the magnetite particle stress at six typical representative points of the three-product magnetic separation column is studied, and the relationship between the rising-water flow velocity and the magnetic field …Web
اقرأ أكثرEffect of magnetic field on laminar convective heat transfer of
1. Introduction. Magnetite nanofluids are engineered colloidal suspension of magnetite nanoparticles in a basefluid, designed to be used in heat transfer applications such as cooling systems of microdevices [1].Recent studies have shown significant enhancement in the thermal conductivity of magnetite nanofluids when magnetic fields …Web
اقرأ أكثرImaging the Magnetization of Single Magnetite Nanoparticle …
To study the magnetic phenomena of single nanoparticles, one can use nonoptical devices such as SQUIDs (superconducting quantum interference devices) …Web
اقرأ أكثر[PDF] Beneficiation of acid mine drainage (AMD): A viable option …
@article{Akinwekomi2020BeneficiationOA, title={Beneficiation of acid mine drainage (AMD): A viable option for the synthesis of goethite, hematite, magnetite, and gypsum – Gearing towards a circular economy concept}, author={Vhahangwele Akinwekomi and J. P. Maree and Vhahangwele Masindi and Caliphs Zvinowanda and …Web
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