Articles tagged with Copper
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A recent study published in The BMJ found that women who stop using some forms of contraception, such as injectable methods, may experience a temporary delay in their return to fertility. After eight months, most women are able to conceive normally again.
Scientists from Chalmers University of Technology investigate the role of nearest neighbors in nanoparticles' activity. They isolated copper particles and monitored their behavior in a nanotube, finding that oxidation state can be dynamically affected by neighboring particles during reactions.
A chemist from RUDN University has developed a copper catalyst that accelerates the click reaction and enables it to occur at room temperatures without additional bases or solvents. The catalyst allows for the production of triazoles, bioactive substances with antibacterial, neuroleptic, and antispastic properties.
Researchers have reengineered current collectors to make batteries lighter, safer, and about 20% more efficient. The new design uses a lightweight polymer and fireproofing, reducing the risk of fires and explosions.
Cornell engineers developed a modular process for designing elastomers with metals like iron and calcium, creating a wide range of mechanical properties. The framework allows for the creation of biodegradable and elastic materials for soft tissue reconstruction and regeneration.
Scientists at Oak Ridge National Laboratory created a composite material that increases electrical current capacity of copper wires, enabling more efficient electric vehicle traction motors. The new material can be scaled for use in ultra-efficient devices with improved performance and reduced cost.
A new bio-based catalyst, copper stearate, has been shown to efficiently inhibit gas hydrate formation and facilitate in-situ oil combustion. The compound's high performance in low-temperature conditions makes it a promising solution for the petroleum industry.
Researchers at Tokyo Institute of Technology have developed a highly efficient blue-emitting semiconductor material Cs5Cu3Cl6I2, which can produce white light while reducing energy consumption. The new material has unique properties that make it more stable and eco-friendly than existing alternatives.
Dye-sensitised solar cells can perform more consistently in low-light conditions thanks to improved understanding of electrolyte additives. Researchers have found that certain molecules, such as 4-tert-butylpyridine and 1-methyl-benzimidazole, are crucial to suppressing recombination losses and maximizing efficiency.
A research team at Cornell University created nanoclusters that can self-assemble and mimic the complex structures of DNA, RNA, and proteins. The clusters have three levels of organization with an interlocking, chiral design, making them potential candidates for metabolic and enzymatic processes.
A Brown University team has created a copper catalyst that can produce C2-plus compounds from CO2 with remarkable efficiency, surpassing other reported efficiencies. The catalyst's high selectivity is attributed to surface defects, which are crucial for carbon-carbon coupling reactions.
Researchers develop microrecycling strategy to convert e-waste into a strong, protective coating for metal. The new material combines copper and silica compounds to form a durable hybrid layer that increases steel hardness by 125%.
Scientists at Lawrence Berkeley National Laboratory found that copper catalysts are superior to purely metallic-origin catalysts in producing ethylene after oxygen is depleted. The team developed a method to 'reactivate' the catalyst by re-adding and re-removing oxygen, improving efficiency.
Researchers found similarities in dietary patterns between noble families and commoners, despite social differences. They also identified specific trace elements that revealed a person's diet and exposure to certain metals.
A new platform technology can assess water safety and quality with just a single drop and minutes. The platform tests for 17 different contaminants, including toxic metals, pharmaceuticals, and cosmetics, providing fast and easy results.
Researchers identified a new function for histones, enabling the transfer of electrons from one molecule to another, converting copper into a usable form for cells. This discovery refutes earlier theories and suggests histones played a crucial role in the evolution of eukaryotes, including humans, around 2 billion years ago.
Histones may have evolved to adapt to oxygenated environments by reducing toxic copper, a crucial element for biological processes. The study reveals a new function of the histone H3-H4 tetramer as an oxidoreductase enzyme, making harmful copper oxidation state safe for use inside cells.
Researchers summarize the processes involved in forming porphyry copper deposits, including dehydration, magma ascent, assimilation, storage, and homogenization. The study highlights ongoing challenges, such as tectonic control on geochemical characteristics and metal pre-enrichment mechanisms.
Researchers at Cornell University used single-molecule tracking and protein quantitation to study the mechanism of bacteria's resistance to toxic metals, revealing a complex series of steps that lead to detoxification. The discovery could lead to the development of more effective antibacterial treatments.
Researchers discovered that copper ions are primarily bound to ceruloplasmin and serum albumin in the blood, with implications for diagnosing and treating Alzheimer's disease. The study's findings provide new insights into normal copper metabolism and its disturbances in genetic diseases.
Researchers have discovered heteroligand complexes of copper with malonic or adipic acid dihydrazides and L-histidine, showcasing trans-influence. The study suggests that these complexes can serve as models for biological systems and potentially be used to enhance the biologically active properties of organic substances.
Researchers at QIBEBT discovered a copper ion that overcomes discharge product build-up issues in magnesium batteries. The Mg/Cu+ battery retained 80% of its capacity after 200 cycles, outperforming traditional lithium-ion batteries.
Menkes disease is a rare genetic disorder caused by a copper deficiency, leading to severe brain damage and neuromuscular deficits. Researchers from Texas A¼M have found promising results using the cancer drug elesclomol to deliver copper to tissues and restore energy production.
A yellowish solid compound has been found to emit an intense green glow when excited by an electric current, making it a hot candidate for producing OLEDs. The substance's chemical structure allows for high light yields due to its stiff molecule and minimal changes in structure upon excitation.
A study by Professor Johannes Knobloch found that European coins made from antimicrobial metals like copper display detectable antimicrobial activity against bacteria, reducing bacterial cell counts by up to 99.5% after 24 hours. However, coins may still act as vectors for the transmission of microbes.
Understanding interactions between metal ions and peptides may lead to improved treatments for diabetes, Alzheimer's, and other diseases. Researchers found that copper can impede the aggregation of pramlintide, but not rat amylin.
Researchers at Purdue University have developed a technique that uses laser-texturing to create nanoscale patterns on metal surfaces, instantly killing bacteria and viruses. The technology has potential applications in medical devices such as orthopedic implants and wearable patches for chronic wounds.
Spanish invaders depended on Mesoamerican copper smelting technology to produce bronze artillery pieces. Indigenous experts shared their knowledge with European colonizers, allowing them to smelt copper and create essential armaments.
Researchers found that copper hydroxychloride improves pigs' ability to utilize fat after absorption, leading to increased energy utilization. The element enhances lipid metabolism in the liver, adipose tissue, and muscle, enabling better feed conversion rates and economic savings.
A new study analyzes human bones from medieval cemeteries to shed light on ancient copper cookware. Researchers found that people consumed tiny portions of copper daily, with cities like Ribe using copper pots for 1000 years.
A Columbia study published in Obstetrics & Gynecology found that patients using copper intrauterine devices (Cu IUDs) had a lower risk of high-grade cervical neoplasms compared to those using levonorgestrel-releasing intrauterine systems (LNG-IUS). The study analyzed data from over 10,000 patients and found the diagnosis rate of high-g...
Researchers at Chalmers University of Technology identified Atox1 as a copper-binding protein that facilitates breast cancer cell migration. High Atox1 levels in tumours are linked to lower survival times, suggesting it may be a biomarker for disease aggressiveness.
Scientists at Rice University successfully grew atom-thick sheets of hexagonal boron nitride, a wide band gap semiconductor, to create perfectly ordered crystals for use in integrated circuits. The breakthrough enables the development of 2D layers with millions of transistors, potentially overcoming limitations in miniaturization.
Researchers developed a small molecule that can modify the coordination sphere of copper bound to amyloid-β, inhibiting its aggregation and toxicity. The study offers insights into chemically modifying neurotoxicity in Alzheimer's disease.
Researchers have discovered a neuron-like electrical switching mechanism in solid-state material β'-CuxV2O5, enabling the creation of circuitry that functions like the human brain. The team's findings showcase the potential for neuromorphic computing to improve energy efficiency and address global computing demands.
A new study by Chung-Ang University researchers reveals that graphene forms a hybrid layer with copper oxide, significantly slowing down corrosion. After an initial period, graphene appears to increase copper corrosion rates, but a longer-term hybrid structure becomes protective over 1 year.
Researchers created a stress-detecting polymer by incorporating copper complexes into polybutylacrylate, shining brighter when stretched. The copper complexes emit light at greater intensity, enabling the detection of small amounts of stress.
A study published in PLOS ONE reveals that prehistoric Italian communities traded copper across complex networks, with most coming from Tuscany. Non-Tuscan copper was also a significant import to the region, contributing to a growing picture of independent metal exchange networks.
Researchers at EPFL have achieved a record-breaking photoelectrochemical water-splitting efficiency of 4.5% using cuprous oxide (Cu2O) photocathodes with copper thiocyanate (CuSCN) as a transparent and effective hole transport layer, showing improved performance and overcoming limitations such as high cost and electron-hole recombination.
The study found that the depth of porphyry copper and gold deposits influences their composition, with deeper deposits containing more copper and shallower deposits containing more gold. Over 95% of gold is lost to the atmosphere through volcanic emissions, making it challenging for companies to extract this metal.
Scientists from ETH Zurich have successfully created a miniature copper statue of Michelangelo's famous sculpture using 3D printing technology. The technique allows for the creation of metal structures at the nanometer and micrometer scale, enabling the production of complex geometries with high precision.
Researchers from POSTECH have successfully developed a flexible battery with thin and three-dimensional organic electrode, increasing energy density by four times. The new technology uses a three-dimensional copper collector to lower the weight of a battery by 10 times more than conventional copper collectors.
Research suggests that southern Arizona was a high-elevation plateau with elevations over 10,000 feet, similar to Tibet, due to its thick Earth's crust. The study provides insight into mountain formation and distribution of natural resources like copper.
A Cornell-led study found that high copper concentrations in sediment increase disease recovery time for sea fans in Puerto Rico. Elevated copper levels stress corals' immune response, making them more susceptible to infection.
A new study found that copper hospital beds in ICUs harbor 95% fewer bacteria than traditional beds, maintaining low-risk levels throughout patient stays. This could lead to improved patient outcomes, lives saved, and healthcare cost savings.
University of Queensland scientists have identified a new reference material and used a state-of-the-art instrument to better date rock formations in central Asia. This new method could help establish the relationship between historical episodes of magma activity and mineral accumulation.
The study investigates the effect of different stearates on in-situ combustion process, revealing copper stearate as a highly effective catalyst. Copper stearate significantly shifted onset and peak temperatures into lower temperatures, showcasing its potential in catalyzing crude oil combustion.
Researchers develop copper telluride nanoparticles that mimic enzymes, inducing oxidative stress and triggering inflammatory processes in tumor cells. This triggers an immune response, allowing the body to defend against metastasis and relapses.
Scientists developed a machine-learning approach to extract catalytic properties from x-ray signatures of catalysts. This method helps identify the active phase of the catalyst, which converts carbon dioxide to methane, and guides the design of more efficient catalysts.
A recent study reveals that early hunter-gatherers on opposite sides of North America interacted much sooner than previously believed. Analysis of human remains, stone tools, and a copper band found in an ancient burial pit in Georgia suggests direct trade networks between the Great Lakes region and the coastal southeast United States....
Researchers create metal that is 42 percent stronger than previous record while maintaining electrical conductivity. The team's discovery combines nanocrystalline and nanotwinned structures to overcome traditional trade-offs between strength and conductivity.
Copper acetate and copper resinate pigments, used in Renaissance-era art, turned brown over time due to molecular changes triggered by light exposure. Boiling linseed oil before mixing slowed the darkening reaction.
A team of researchers at the University of Pittsburgh's Swanson School of Engineering has developed a new method to separate ethylene from ethane gas, which is abundant in natural gas. The technique uses isolated copper atoms that olefins like ethylene can bond to strongly, potentially saving energy and reducing costs.
A Tel Aviv University study finds the kingdom of Edom flourished in the Arava Desert during the 12th-11th centuries BCE, with expert analysis revealing a copper 'high-tech network' led by an affluent society. The researchers attribute the sudden improvement in copper production to Pharaoh Shoshenq I's military campaign.
A University of Houston chemist is investigating the role of copper in neurodegenerative diseases like Alzheimer's. The researcher aims to understand how cells regulate copper levels, which are found to be unusually high in people with the disease.
Researchers at Harvard University have discovered the architecture of a copper-nitrenoid complex that can transform carbon-hydrogen bonds into valuable building blocks for chemical synthesis. This breakthrough could lead to more efficient and sustainable production methods for pharmaceuticals, household products, and other chemicals.
Scientists at CNRS have created polymers that can change information stored on a molecular level using specific wavelengths of light. This technology allows for the storage and decoding of secret messages, with potential applications in designing new materials.
Researchers discovered that electrons in copper oxide superconductors continue to pair up even above the critical temperature, reducing the energy gap. This finding constrains theories about high-temperature superconductivity and opens avenues for designing more precise materials.
Researchers from Russia and Japan have developed a new stabilization method for unique 2D copper oxide materials using graphene, allowing them to exhibit stable rectangular atomic structures. This breakthrough has significant implications for the development of spintronics devices, as these materials show promise in this field.
A novel catalysis system reduces carbon dioxide to methane in a single step, eliminating intermediate steps. The system uses copper and nanostructured silver surfaces, yielding higher methane concentrations than copper-only systems.