Articles tagged with Metals
Federal, provincial and territorial mines ministers agree that vulnerable mining communities are a priority. The conference discussed ways to maintain community viability through cooperation on exploration initiatives, processing technologies, and Aboriginal engagement.
The TAXUS V trial found paclitaxel-eluting stents significantly reduced angiographic restenosis and target vessel revascularization rates. The study's results support the use of these stents for patients with more complex coronary lesions, reducing the risk of artery re-narrowing after angioplasty.
Researchers have designed new cyclic alkyl amino carbenes (CAACs) that enhance stability and efficiency of metal catalysts. These carbene-based catalysts facilitate faster chemical transformations at lower temperatures, reducing costs in pharmaceutical manufacturing.
Researchers at NIST have developed chip-scale refrigerators capable of reaching temperatures as low as 100 milliKelvin, enabling cooling of bulk objects. The solid-state refrigerators have applications in semiconductor defect analysis and astronomical research.
Researchers at Rutgers University develop nanostructured iridium surfaces to extract hydrogen from ammonia, enabling efficient fuel cell operation. The process could contribute to the solution of hydrogen economy's storage and transport obstacles.
UCR researchers Ludwig Bartels and team advance nanoscale electronics development by controlling chemical reactions one molecule at a time. They use an STM to guide individual molecules through step-by-step reactions, enabling fine-tuning of reactivity and optimizing atomic-scale construction of complex molecules.
Researchers at Johns Hopkins University have developed a new set of molecules that can catalyze the cleanup of common groundwater pollutants called organohalides. The compounds 'break bonds' holding dangerous pollutants together, rendering them safer.
Research found that adults with high blood concentrations of lead or cadmium were almost three times more likely to develop peripheral artery disease, a condition similar to coronary artery disease. The study suggests that low-level exposure to these metals may be problematic in terms of cardiovascular disease risk.
A study of 2,125 adults found that those with the highest blood concentrations of lead or cadmium were almost three times more likely to develop PAD. The highest levels of the two metals were well within what is currently considered safe levels.
Scientists at Yale University used X-ray crystallography to image the self-splicing group-I intron and its associations with metal ions. This discovery reveals an evolutionarily ancient mechanism for RNA splicing, previously thought only possible in proteins.
Researchers discovered an optimal shape of nanoscale contact surface that enhances adhesion strength, which becomes insensitive to small variations at a critical size scale of around 100 nanometers. This finding suggests combining size reduction and shape optimization for robust and reliable adhesion.
Catalina Achim, a Carnegie Mellon University chemist, has received the prestigious NSF CAREER award to support her research on incorporating metal ions into peptide nucleic acid (PNA). The grant will also enable her to develop an interdisciplinary course bridging inorganic chemistry and art.
The new system uses high-frequency seismic waves to detect buried mines, distinguishing them from soil and ground clutter. Researchers have demonstrated its advantage in laboratory and limited field tests, with promising results at government testing facilities.
A new cryogenic refrigerator, developed by NIST, uses a solid-state design to cool X-ray detectors to subKelvin temperatures. The device reduces the need for bulky and expensive current equipment, making it ideal for semiconductor manufacturing and astronomical applications.
Researchers have deciphered the genome of Geobacter sulfurreducens, a microbe that can remove dissolved uranium from groundwater and generate electricity. The study reveals new capabilities, including enhanced electron transport and metal reduction genes.
Scientists discover conditions for cracks to propagate supersonically in brittle solids, challenging classical theories on fracture speed. Hyperelasticity governs dynamic fracture under extreme deformation, with a characteristic length scale near the crack tip.
Researchers at NIST created improved phantom materials that can mimic blood, bone, fat, and skin using carbon black powder. These polymers have low-frequency electrical properties and can be formed in various shapes and sizes.
Researchers have found a new state of matter where bosons condense into a glass-like, metallic state. This discovery contradicts the conventional theory of metals and poses a serious theoretical question about the nature of this intermediate phase.
Johns Hopkins researchers found deformation twinning in nanocrystalline aluminum, explaining how it deforms under high loads. This discovery will help build models to predict the performance of these materials in real-world devices.
A Ph.D. student in chemistry at Virginia Tech has been selected to attend the 53rd Meeting of the Nobel Laureates, focusing on biochemistry. The student will have personal interactions with Nobel laureates and engage in seminars and roundtable discussions.
Researchers at Rutgers University and Los Alamos National Laboratories used computer simulations to predict that heated plutonium will collapse five percent in volume and exhibit anisotropic elastic properties, leading to unusual deformation behaviors. This study aims to aid material scientists and engineers in storing the metal.
The SNAP process creates high-density nanowire lattices with reported junction densities exceeding 1011 per square centimeter. Researchers can deposit wires out of almost any material and transfer them onto substrates for various applications, including molecular switches, sensors, and magnetic storage devices.
Researchers pinpoint stellar production of helium, revealing it was 24-25% of matter in the primordial universe. The study's findings suggest metal-rich stars produce 2.1 times as much helium as metals, with implications for dark energy.
Rice University scientists develop a nanosensor that can precisely analyze chemical information, opening doors for new methods to examine single molecules. The technology has widespread applications in environmental science, chemistry and biosensing, with potential early detection of cancer.
Researchers establish superconductivity in lithium at pressures greater than 30 GPa, with critical temperatures ranging from 9 K to 16 K. This finding contradicts theory and sparks interest in searching for high-temperature superconductivity in light element compounds.
The Purdue team has developed a new type of antenna that can detect a single molecule using electromagnetic radiation. This innovation could lead to detectors millions of times more sensitive than current technology, with potential applications in medical diagnostics and homeland security.
The Cornell team will study the chemistry of inorganic-organic interfaces and develop fabrication methods to overcome difficulties in connecting wires to organic transistors. Their goal is to produce testable devices with useful properties, tackling challenging problems in molecular-based electronics.
A new computational model developed at Purdue University accurately predicts the performance of thermal-barrier coatings, allowing designers to predict the properties of various mixtures. The model has been shown to be over 90% accurate and promises to save time and money by ruling out ineffective mixtures.
Chemists at Ohio State University have created the first-ever compounds of uranium bonded to atoms of three so-called
Researchers from Utrecht have discovered that carbon nanofibres can effectively replace active carbon as a carrier for catalysts, enhancing the efficiency of hydrogenation reactions. The new material allows for the reuse of catalysts and has shown promise in the industrial-scale production of compounds like cinnamon alcohol.
Researchers at Purdue University have successfully linked two tiny structures called quantum dots to create a semiconductor-based quantum computer. The device uses quantum bits that exist in both on and off states simultaneously, enabling faster processing of information than conventional computers.
A recent study by Virginia Tech researchers reveals that despite corrosion, the lead in bullets and shot remains trapped in mineral coatings, reducing environmental risk at shooting ranges. High concentrations of lead have been found on ranges worldwide, raising concerns about toxicity and environmental impact.
Virginia Tech researchers create supramolecular complexes with multiple capabilities, including new DNA binding properties and solar energy conversion potential. The complexes are formed by connecting metal-based molecules using polyazine ligands, allowing for the creation of diverse systems with unique properties.
Research shows that smoking exacerbates circulatory problems caused by vibration white finger, a condition affecting workers who use pneumatic tools. Smokers are twice as likely to experience severe symptoms of vasoconstriction compared to non-smokers.
University of Cincinnati researchers have developed new techniques to analyze selenium in food supplements, identify arsenic accumulation in seafood and sea plants, and speed up sample preparation using microwave energy. These advancements hold promise for environmental health, bioremediation, and understanding metal toxicity.
Researchers have developed cost-effective methods for manufacturing ultralight porous metals that can be used in various applications including cooling motor drives and reinforcing aircraft parts. The new materials are lightweight, extremely heat resistant and strong in three dimensions.
Researchers at the University of Illinois have discovered that tumbling atoms play a crucial role in hydrogen re-forming reactions. The study reveals that hydrogens exchange sites with each other, leading to the formation of new bonds between carbon and metal centers.
Researchers at Ohio State University have developed a new process to create near-net-shaped ceramic parts without shrinking or changing shape. The method uses a mixture of ceramic and metal powders, which oxidize to form ceramics with desired properties.
Researchers at Savannah River Technology Center found metal-munching bacteria thriving in sterile storage pond environments, threatening long-term nuclear fuel rod integrity. This ill-timed discovery comes as a global downturn in nuclear reprocessing leads to extended storage periods.
Researchers at Ohio State University have developed a fast new method to analyze part designs and locate potential defects that may form in die-cast metal parts. The binary voxel model uses geometry to simulate die casting, producing an image with color-coded areas of concern. This method can identify weak spots in seconds, unlike more...
Researchers used laser pulses to capture detailed snapshots of electron motion at metal surfaces, revealing fundamental dynamics in real-time. This technique has implications for understanding phenomena such as transistor performance and chemical reactivity.
Dr. Daniel C. Ralph has made significant contributions to the development of experimental techniques for studying nanoscale structures. He was awarded the 1997 McMillan Award for outstanding work in condensed matter physics.
Peter Nagy's research uses laser irradiation to pinpoint damage specific to fatigue in older aircraft. By detecting changes in metal behavior when heated, he can identify the inherent degradation of materials and prevent further cracking.
A temporary metal filter successfully caught a life-threatening blood clot in a bedridden patient, preventing catastrophic lung damage. The procedure, performed by Johns Hopkins physicians, marks the first use of the filter in the US and holds potential for thousands of accident victims.