Articles tagged with Magnetite
Researchers from Okayama University have identified a novel eukaryotic protein called radular teeth matrix protein 1 (RTMP1) that plays a crucial role in regulating iron oxide deposition in chiton teeth. The study reveals that RTMP1 helps concentrate iron ions on the chitin fibers, making them ultrahard and durable.
Scientists have discovered that specific light wavelengths can induce non-equilibrium transitions in magnetite, a well-studied material. This breakthrough enables the control of electronic properties at ultrafast timescales, opening up new avenues for advanced materials and device development.
Researchers analyzed asteroid Ryugu samples to study magnetic and physical bombardment environment in interplanetary space. The investigation revealed changes likely caused by micrometeoroid bombardment, providing insights into the solar system's early stages.
Research suggests that magnetite particles, found in air pollution, can induce signs and symptoms of Alzheimer's disease. The study exposed mice to fine particles of iron, magnetite, and diesel hydrocarbons, finding that magnetite induced Alzheimer's disease pathologies, including neuronal cell loss and amyloid plaque formation.
A study of Ryugu samples suggests that micrometeorites from icy celestial bodies in the outer Solar System transported nitrogen compounds to near-Earth regions. This discovery could provide clues about the origins of nitrogen on our planet, potentially serving as a building block for life.
The study found that magnetite nanoparticles enhanced the breakdown of PCB15 by 42% and 84% after 3 and 5 days, respectively. Fungal-mineral samples showed uneven distribution on hyphal surfaces, suggesting a synergistic effect.
Researchers found that bacteria with electrically conductive protein threads can corrode iron anaerobically, producing magnetite that facilitates further corrosion. The discovery has significant implications for corrosion protection and suggests taking material properties into consideration.
Researchers detected sub-microscopic magnetite and metallic iron particles in Chang'E-5 lunar soil through electron microanalysis. This discovery provides direct evidence for the formation of native magnetite in lunar samples and sheds light on the origin of Moon's magnetic anomalies.
A new theory outlines how magnetite crystals in specialized receptor cells of salmon and other animals may have roots in ancient genetic systems developed by bacteria, suggesting a common evolutionary history between magnetite-producing bacteria and fish. The findings have the potential for widespread application, from improving salmon...
Researchers discovered a graphene-like material called magnetene that exhibits ultra-low friction, contrary to predictions based on Van der Waals forces. Quantum effects play a crucial role in its behavior, making it suitable for use in micro-electro-mechanical systems and implantable devices.
Researchers found that Maya rulers altered their cities' structures and alignments to reflect their own desires and authority. Many temples were built on top of existing ones or abandoned altogether, shifting the focus from community ritual to ruler-centric politics.
Scientists have developed a novel technique to analyze magnetites in meteorites, providing a historical record of the early Solar System's dynamics. By studying the Tagish Lake meteorite, researchers infer that the parent body formed in the Kuiper Belt and moved to the asteroid belt after Jupiter's formation.
Researchers have discovered that tiny bubbles in erupted lava can tell tales of big volcanic eruptions, and magnetite crystals may explain the staggering number of bubbles. Scientists used numerical models to reconcile differences between predicted and actual bubble amounts, leading to improved volcanic forecasts.
Scientists have uncovered low-energy waves in magnetite that indicate the importance of electronic interactions with the crystal lattice. The discovery reveals the trimeron order in magnetite has elementary excitations with very low energy, absorbing radiation in the far-infrared region.
Researchers found that salmon use microscopic crystals of magnetite in their tissue as both a map and compass to navigate the Earth's magnetic field. The study suggests that chains of magnetite may play a role in the navigation system of salmon.
A team of scientists from MIT has found evidence to contradict previous claims that the Earth's magnetic field existed beyond 3.5 billion years ago. The researchers studied zircons excavated from an ancient outcrop in Western Australia and concluded that these minerals are unreliable as recorders of ancient magnetic fields.
Researchers discovered evidence of a strong early magnetic field in ancient minerals, dating back to 3.2-4.2 billion years ago. The study suggests that the magnetic field was relatively strong between 4.1 and 4 billion years ago, likely powered by an internal geodynamo.
Researchers have created ultra-thin magnetite nanowires with a remarkable 'Verwey transition' from metal to insulator at low temperatures. This unique property could be used to control electronic devices and support green technology.
Researchers found that buildup of lithium oxide and decomposition of electrolyte lead to rapid capacity fade in magnetite-based electrode material. The conversion reaction is not fully reversible, causing residual products to accumulate and block electron transport.
Liposomes, small artificial structures with lipids and aqueous cores, have been engineered to transmit light or electrical signals. By incorporating magnetic nanoparticles and fluorescent molecules, the vesicles can be controlled by magnets and used for Boolean logic operations, enabling on/off signal transmission.
Researchers have discovered the genetic puzzle behind a mollusk's ability to produce magnetite nanomaterials. The study found that specific proteins are involved in transforming raw materials into magnetite, which could lead to the development of next-generation electronics and energy sources.
Researchers found that magnetite in Hadean zircons is likely a secondary deposit, formed after crystallization, precluding analysis of the Earth's earliest magnetic field. The presence of secondary magnetite indicates that a magnetic field may have existed during the Hadean Eon, but more evidence is needed to confirm this.
Researchers have used magnetoencephalography to measure magnetite levels in the human brain, which could lead to new studies on its role in neurodegenerative diseases. The study found greater accumulation of magnetite in the brains of older individuals, primarily in the hippocampus.
Researchers used XPCS to study magnetite's electrical conductivity transition from insulator to metallic, finding it occurs in two steps. The technique revealed that the fast phase is one step and the slowing down is the second step, suggesting that metallic and insulating properties coexist during the phase change.
A new anti-thrombosis drug based on magnetite nanoparticles has been developed by ITMO University researchers. The drug successfully passed preclinical testing, showing a 20 times shorter clot dissolution time and a lower minimum dose required to achieve the therapeutic effect compared to traditional medications.
A recent study from CNRS has cast doubt on the connection between magnetite particles and Alzheimer's disease, as previous research suggested that magnetite could cause oxidative stress and lead to neuron degeneration. The new findings suggest that magnetite is unlikely to be involved in this process.
Magnetic soil nanoparticles are primarily composed of magnetite, formed by soil wetting and drying cycles. This finding suggests that magnetic variations in Chinese Loess Plateau soils can be used as a benchmark for testing paleoclimate models.
Researchers from NC State University have found a simpler way to deposit magnetic iron oxide nanoparticles onto silica-coated gold nanorods, creating multifunctional nanoparticles with useful magnetic and optical properties. The new technique uses an approach called heteroaggregation, resulting in highly uniform nanoparticles that can ...
Researchers at Vienna University of Technology observe how carbon monoxide enables single platinum atoms to move and form clusters, breaking the grip of the magnetite surface. This process has significant implications for chemical catalysis, as it opens up a strategy to turn clusters into single atoms.
Researchers developed a technique to visualize lithium ion battery discharge mechanisms in nanosized iron-oxide material, revealing the intercalation and conversion reactions that occur during lithiation. The study provides insights into how to improve battery performance and increase their longevity.
A team of researchers from Germany and the UK used high-resolution electron microscopy to study magnetic vortices in magnetite minerals, revealing that they are surprisingly resilient to temperature changes. The findings have significant implications for understanding the Earth's magnetic field history and plate tectonics.
Researchers describe the complex structure and proposed explanation for the unusual properties of Fe4O5, a recently discovered iron oxide that exhibits a four-dimensional crystal structure. The material shows similarities to magnetite but lacks ferroelectric properties, sparking interest in its potential practical applications.
Researchers have developed a magnetically controlled material composed of enzymes entrapped within magnetite particles, enabling targeted treatment of cancer and thrombosis. The new material stabilizes itself without additional stabilizers, making it suitable for intravenous injection.
Scientists believe the Earth's magnetic field arose at least four billion years ago, according to research published in Science. The findings support previous geochemical measurements on ancient zircons that suggest an age of around 4.4 billion years.
Researchers from the Geological Society of America discovered intricate microbe-sediment systems in ancient rocks, suggesting thermophilic life forms existed at least 3.3 billion years ago. The findings indicate that these early life forms were deeply rooted in time and flourished in hydrothermal environments.
Researchers discovered that bacteria can use magnetite to create a 'natural battery' by loading and discharging electrons. This mechanism has implications for cleaning up toxic metals and could be adapted for other types of bacteria, expanding its potential uses.
Researchers at Vienna University of Technology have redefined the atomic structure of magnetite, a crucial component in electronic devices and medical applications. The study reveals that the surface of magnetite is governed by missing iron atoms, leading to an efficient catalyst for chemical reactions.
Weizmann Institute scientists have created twisted, rope-like structures from cube-shaped nanoparticles, demonstrating the power of self-assembly in nanomaterials. The findings reveal how competing forces like magnetism and van der Waals forces can align particles into complex shapes.
Researchers have successfully documented the atomic-level mechanism of oxide material switching, which occurs in two stages and proceeds in under a picosecond. This confirms that oxides can represent an exciting alternative to semi-conductors for faster, more energy-efficient electronics.
Scientists at SLAC National Accelerator Laboratory have clocked the fastest-possible electrical switching in magnetite, a naturally magnetic mineral. The results could drive innovations in tiny transistors that control electricity across silicon chips.
Researchers at The Ohio State University have developed a method to purify and enrich magnetotactic bacteria, which can produce magnetic nanocrystals. These bacteria are found in aquatic environments worldwide and possess unique properties that allow them to align with the Earth's magnetic field.
LMU researchers have identified magnetosensory cells in trout that detect the Earth's magnetic field and convert it into nerve impulses. The cells sense the field through micrometer-sized inclusions of magnetic crystals, which are coupled to the cell membrane.
Researchers have identified a new type of magnetic bacteria, BW-1, in Badwater Basin that can produce both greigite and magnetite. The discovery may lead to novel applications in drug delivery and medical imaging due to its unique properties.
Researchers discover subtle electronic effect in magnetite that causes a dramatic change to its electrical conductivity at very low temperatures. This discovery gives new insight into the mineral's structure and behavior, potentially enabling the exploitation of magnetite and similar materials in new ways.
Researchers at NIST used neutron beams to study magnetite nanoparticles, revealing a complex interaction between the inner 'core' and outer 'shell'. The discovery could lead to new tools for controlling particle behavior in data storage and biological applications.
Migration '09 conference presents new approaches to imaging mineral-water interfaces and controlling actinide migration. Researchers discuss stabilization of intermediate uranium oxidation states and manipulation of plutonium colloids to control its movement.
Researchers have discovered a new species of microorganism that thrived 55 million years ago during a period of abrupt global warming. The 'giant' magnetofossils, which are up to eight times larger than previously known ones, provide valuable insights into the potential effects of significant climate changes on life.
Researchers have developed a ceramic material that heats up in the microwave without causing damage, allowing for faster cooking times. The material, made from petalite and magnetite, can retain heat for up to 15 minutes, enabling innovative food preparation methods.
Researchers found that bats use magnetite as an 'internal compass' to help them navigate. The study involved giving Big Brown bats magnetic pulses and observing their behavior.
Researchers discovered that magnetite's magnetic strength halves when subjected to pressures between 120,000 and 160,000 times atmospheric pressure. The change is due to a decrease in unpaired electrons, which affects the spin of magnetic materials.
Researchers at Rice University have discovered a surprising new electronic property in magnetite, a well-studied magnetic mineral, by using nanofabrication methods. They were able to get the material to revert from an insulator to a conductor at temperatures colder than minus 250 degrees Fahrenheit.
Scientists have designed two-dimensional arrays of cadmium selenide nanoparticles, also known as quantum dots, to change their optical and light-emitting properties. These nanostructures can be used as waveguides or lasers.
Researchers found that the Hawaiian hotspot drifted southward between 47-81 million years ago, contradicting the traditional stationary plume theory. This discovery sheds light on terrestrial dynamics and raises fundamental questions about the mantle's role in controlling plate motions.
A team from Arizona State University has questioned the evidence for bacterial life in a Martian meteorite, citing limitations in microscope technology and data selection. The researchers argue that the shapes of magnetite crystals found in the meteorite are not uniquely identifiable with bacteria.