Articles tagged with Chromium
A team of chemists at Nagoya University has synthesized novel transition metal-complexed cycloparaphenylenes that enable selective monofunctionalization of CPPs. The discovery opens doors to the construction of unprecedented nanocarbons, including carbon nanotubes with new properties.
Researchers have created high-value, compact nanoscale resistors using thin-film chromium oxide, enabling faster development of quantum devices for computing and fundamental physics research. The new resistors can be tuned by controlling oxygen content, making them compatible with quantum phase-slip circuit requirements.
Scientists found that oxygen levels during the Proterozoic period were only 0.1% of today's conditions, making it difficult for animal life to emerge. This new study suggests that low oxygen levels may have delayed the rise of animals on Earth.
Researchers have discovered a new semiconducting material that allows solid oxide fuel cells to operate at two-thirds lower temperatures than current technology. This breakthrough enables more efficient fuel cells with wider applications, including quieter, pollution-free power generation in vehicles and neighborhoods.
A study analyzing nearly three decades of data found chromium supplements are ineffective in reducing fasting glucose levels in both diabetic and non-diabetic populations. Despite this, the researchers suggest other dietary supplement ingredients may have positive effects on fasting blood sugar levels.
Researchers discover sodium lignosulfonate can immobilize and remove toxic chromium compounds from contaminated soil and water. The compound reduces chromium mobility, making it less likely to leach into waterways.
Researchers detected lead, cadmium, chromium, aluminum, and five other metals in commonly used lip products, with some exceeding safe daily intake limits. The study highlights the need for greater oversight by health regulators to ensure cosmetic products meet safety standards.
Researchers at the University of Georgia have developed a new material that emits a long-lasting near-infrared glow after a single minute of exposure to sunlight. The material has potential biomedical applications, including visualizing cancer cells, and can be used for military and law enforcement illumination.
The discovery of oxygen-breathing bacteria on land is now estimated to have occurred around 2.48 billion years ago. This finding pushes the Great Oxidation Event forward in time, suggesting that aerobic respiration evolved earlier than previously thought.
Scientists create a method for growing straight carbon nanofibers on clear substrate, enabling novel biomedical research tools and applications. The technique relies on ions to ensure the nanofibers are straight.
A new method combining electrochemistry and photovoltaics is being explored to clean up oxidation reactions. By harnessing solar energy, the need for toxic chemicals can be eliminated, reducing environmental harm. The research aims to make chemical synthesis more efficient and environmentally friendly.
Early Earth's core may have formed from lighter chromium isotopes, which are mostly missing from the planet's mantle and crust. This finding provides new insights into the planet formation process.
A new nickel alloy consumable has been developed to lessen the risk of breathing toxic fumes on the job. The alloy is compatible with stainless steel and produces no fumes of hexavalent chromium, a toxic form of chromium linked to cancer.
Researchers found that coffee husks can adsorb almost 50 milligrams of hexavalent chromium per gram, with two-thirds of the absorbed chromium recoverable. The use of coffee husks presents a viable and cost-effective part of a waste-management strategy due to their availability, safety in storage, and lack of protein.
Researchers found that mice treated with chromium picolinate had lower levels of albuminuria compared to untreated diabetic mice. The supplement reduced inflammation by affecting IDO, IL-6, and IL-7, suggesting a potential therapeutic effect.
A study by researchers at Rush University Medical Center found elevated levels of cobalt and chromium in the offspring of mothers with metal-on-metal hip implants. The levels were significantly higher than those in a control group, suggesting that metal ions can be transferred from mother to fetus.
A pilot study using miniaturized air samplers found no strong evidence of health risks for subway workers exposed to steel dust, with levels below OSHA standards. The study also showed that airborne metal concentrations were much higher in stations and trains than above ground.
Astronomers using NASA's Suzaku orbiting X-ray observatory have discovered the largest known reservoir of rare metals in the universe, including chromium and manganese. The metallic atoms were detected in the hot gas between galaxies, providing insights into the chemical history of stars and galaxies.
Analysis of ancient rock isotopes reveals a rise in atmospheric oxygen 580 million years ago triggered the evolution of large complex animals. This discovery confirms oxygenation of oceans as a driving force for animal life.
Researchers discovered a pressure-driven quantum critical regime in chromium, achieving the first direct measurement of a 'naked' quantum singularity in an elemental magnet. This breakthrough paves the way for understanding magnetic quantum criticality in more complex systems.
Researchers at MIT have developed a new nickel-tungsten alloy that replaces toxic chrome coatings, offering improved durability and environmental safety. The new coating is being tested on truck bumpers and has shown promise in reducing corrosion and pollution.
Researchers at Dartmouth have found that chromium displays unexpected magnetic properties, which can be used in spintronics to process and store data more efficiently. This discovery expands the potential applications of antiferromagnets in technology.
A clinical study showed daily supplementation with chromium picolinate improved cognitive function in older adults experiencing early memory decline. The results suggest that improving glucose metabolism with chromium picolinate supplementation may enhance cognition.
A clinical study showed Diachrome significantly improved glycemic control in patients with poorly controlled blood sugar levels, reducing A1C by 0.54% and fasting glucose by 9.8 mg/dL. The greatest improvement was seen in those with the poorest glycemic control, who experienced an additional absolute A1C decrease of 1.76%.
Researchers discovered that hexavalent chromium causes cancer in laboratory animals when consumed in drinking water, leading to malignant tumors. The study found significant increases in tumors at high doses, highlighting the chemical's potential health risks.
Brown University researchers found that naturally occurring vitamin C reacts with chromium 6 to cause massive DNA damage, leading to cancer. The study suggests that even low doses of chromium 6 combined with vitamin C can produce significant genetic mutations.
A review published in Diabetes Technology & Therapeutics confirms chromium picolinate's benefits in improving glycemic control and normalizing lipid levels. Higher doses of chromium picolinate are required for people with type 2 diabetes, and its greater bioavailability may explain its superior effects.
A recent study published in Diabetes Technology and Therapeutics demonstrated that Diachrome safely improves blood glucose levels and cholesterol metabolism in people with type 2 diabetes. The 30-day study showed a significantly greater reduction in glucose levels, suggesting potential benefits for improved blood sugar control.
Researchers at MIT create a new alloy using nanostructure manipulation to replace chromium, a toxic material used in industrial coatings, reducing fumes and improving resistance to corrosion. The technology has the potential to transform industries and improve worker safety.
Researchers at UC Davis have successfully synthesized a chromium-based compound with a five-fold bond, a feat previously thought impossible. This breakthrough challenges the current understanding of metal chemistry and opens up new avenues for research in carbon chemistry.
A double-blind, placebo-controlled trial found that chromium picolinate supplementation significantly reduced carbohydrate cravings and improved symptoms of atypical depression. The study suggests that chromium picolinate may be beneficial for patients with severe carbohydrate craving, a characteristic symptom of the disorder.
A new clinical study found that chromium picolinate supplementation increased insulin sensitivity by 8.9% in individuals with type 2 diabetes, compared to a 3.6% decrease in the placebo group. The study suggests that chromium picolinate may improve insulin action through activation of Akt phosphorylation.
Researchers at the University of Illinois have developed a simple and effective method to monitor chromium contamination in groundwater. By analyzing the isotopic ratios of hexavalent chromium, they can determine how much reduction has taken place and estimate the long-term reduction rate.
Virginia Tech researchers have created a Selective Ion Trap (SIT) device that can capture and preserve chromium six in the field, enabling faster and more accurate analysis of contaminated groundwater. The device uses a plastic membrane to trap chromium six without allowing it to transform into less reactive forms.
Scientists develop a new process using chromium chloride to produce hundreds of thousands of compounds in just one experiment. The innovation enables faster screening of industrial products, including drugs and dyes.
Scientists discovered that microorganisms in basalt rock can reduce toxic hexavalent chromium to less toxic forms, especially in the presence of volatile organic compounds. The researchers found that certain bacteria, such as Arthrobacter oxydans, play a key role in this process.
Researchers found that chromium picolinate causes DNA breakage, potentially leading to genetic mutations and cancer. The study's findings highlight the need for further investigation into the long-term effects of chromium picolinate supplementation.
Researchers coax bacteria from contaminated soil into cleaning up toxic heavy metal chromium by adding appropriate nutrients. The team aims to optimize microbial action at contaminated sites for effective bioremediation.
Researchers at the University of Cincinnati present success stories in bioremediation and risk assessment, including bacteria strains capable of breaking down toxic compounds like N-heterocyclics and PAHs. A team develops ultra-trace methods to detect metal pollutants, improving accurate risk assessment.