Articles tagged with Oxidation
Researchers from Dalian Institute of Chemical Physics designed a chainmail catalysis system for CO oxidation, achieving near 100% conversion at room temperature. The graphene-isolated Pt catalyst overcomes the issue of deep oxidation and enables efficient CO conversion.
A new model by a SwRI-led team applies geologic evidence to understand how oxygen levels in the Earth's atmosphere evolved. The results indicate that large impacts may have contributed to the scarcity of oxygen, delaying its oxidation.
A new study suggests that drinking 100% orange juice significantly reduces interleukin 6, a well-established marker of inflammation, in both healthy and high-risk adults. However, the results did not quite reach statistical significance for two additional inflammatory and oxidative stress markers.
Researchers developed a strategy to achieve ultra-high loading of single metal atom sites on cobalt oxide support, stabilizing Rh and other noble metals. The strained surface showed exceptional UOR activity and stability, requiring lower working voltage than commercial Pt and Rh catalysts.
Researchers found an early indicator of Alzheimer's disease is an oxidation-antioxidant imbalance in the blood. Oxidative markers increase up to five years before the onset of the disease, suggesting a potential avenue for prevention through antioxidant intake.
A team of researchers simulated the loss of physical activity during COVID19 lockdowns to study its effects on metabolism. They found that mice's energy sources shifted based on their diet composition after a sharp decline in exercise, leading to weight gain.
Scientists discovered structural and surface chemistry defects in superconducting niobium qubits that may cause loss. The study pinpointed these defects using state-of-the-art characterization capabilities at the Center for Functional Nanomaterials and National Synchrotron Light Source II.
Dalian Institute of Chemical Physics researchers propose dual active site strategy to isolate dehydrogenation and oxidation in oxidative dehydrogenation of ethane, resulting in near 100% ethene selectivity. This approach could be extended to multiple oxidation reactions plagued by over-oxidation.
Researchers from Pusan National University have compiled a comprehensive review of ginsenosides, the main component of ginseng, which can prevent inflammation, diabetes, and cancer. The study provides insights into how to improve ginsenoside production through chemical and enzymatic treatments, as well as microbial action.
Scientists from Tokyo University of Science and NIMS Japan have evaluated the irreversibility of LixWO3 thin films. They found that irreversible Li+ trapping and Li2WO4 formation are different processes, with proportions of 7.7% and 50.9%, respectively.
A research team at UNIST has developed a novel technique that converts liquid ammonia into green hydrogen with high purity and efficiency. The method consumes significantly less power than traditional electrolysis of water, making it an attractive alternative for hydrogen production.
Researchers discovered that certain catalyst materials, such as erythrite, improve in performance over time due to restructuring. This process increases the surface area of the material, allowing for more reactions to occur, resulting in higher oxygen yields and doubled electrical current generation.
Researchers found that tin fluoride additive traps oxidized tin in solution, reducing instability. Fluoride also improves colloid stability, leading to more homogeneous crystal growth.
Researchers from University of Tsukuba discovered that exposure to organic light-emitting diodes (OLEDs) before sleep reduces negative health effects on energy metabolism. OLEDs emit less blue light, leading to decreased energy expenditure and core body temperature during sleep.
Researchers used AFM-IR, ToF-SIMS, and fluorescence microscopy to study bitumen surface composition and structure. The study found that the surface is heterogeneous, with individual molecular assemblies distributed in a specific pattern.
Researchers developed hollow amorphous Co/C composites to activate hydrogen peroxide, generating singlet oxygen that selectively eliminates oxytetracycline in complicated water matrices. The system exhibited excellent repeatability, stability, and anti-interference ability.
Researchers have developed a machine-learning algorithm to categorize metal-organic frameworks by oxidation state, providing a solution to the long-standing problem in chemistry. The collective knowledge of the chemistry community was used to train the model, which captured the errors and inconsistencies in existing methods.
Scientists successfully synthesized cyclo[9]pyrroles via oxidative coupling of terpyrrole, showing intense absorption at 1,740 nm. The molecular structure and electronic properties were analyzed using NMR and X-ray diffraction, providing insights into the optical and physical properties of porphyrinoids.
Research investigates ferric oxalate's role in atmospheric oxidation, revealing its contribution to the formation of secondary organic aerosols (SOA) and affecting radiative forcing. The study highlights the significance of superoxide radicals in oxidizing organic compounds.
Scientists have made significant progress in understanding the atmospheric oxidation capacity, which is crucial for reducing smog and haze formation. Researchers have developed indexes to characterize this capacity in Beijing and plan to apply them in other highly polluted regions of China.
A recent study has unveiled a new principle that active charge transfer at the interface between non-noble metals can enhance the catalytic performance of complex oxide catalysts. The researchers found that CeO2-deposited spinel oxide nanocubes exhibited a 12-times higher CO oxidation rate than pristine Co3O4 NCs.
Researchers at NIH/National Human Genome Research Institute developed a breath test to measure how well patients with methylmalonic acidemia respond to liver or combined liver and kidney transplants. The test assesses the severity of the disease and helps determine treatment efficacy.
A new study published in Journal of the International Society of Sports Nutrition found that consuming caffeine before aerobic exercise significantly increases fat-burning. The study's results suggest that combining acute caffeine intake with exercise performed at moderate intensity in the afternoon is the optimal scenario for increasi...
Scientists have developed a new material with faster and more efficient electrochromic properties than existing materials. The material, called Covalent Organic Frameworks (COFs), can be triggered by an applied electrical voltage, allowing for rapid color change and high sensitivity to electrochemical oxidation.
Researchers have identified a new category of compounds called pyrazinacenes that can be reversibly oxidized and reduced. These compounds consist of connected rings of carbon, nitrogen, and hydrogen atoms and have the potential to support photoredox-based reactions in chemical synthesis.
Direct ethanol fuel cells have high energy density, low toxicity, and easy operation, but lack robust electrocatalysts for anodic ethanol oxidation. The study proposes alloying effects with core-shell construction to optimize Pd shell surfaces, achieving highest mass activity and specific activity for catalyzing ethanol electro-oxidation
A research team at TROPOS and University of Helsinki has discovered that alkanes in fuels produce highly oxygenated compounds that can form organic aerosol and contribute to air pollution. The study uses state-of-the-art measurement technology to demonstrate an efficient autoxidation chain reaction for saturated hydrocarbons.
Researchers discovered that secondary organic aerosols can form quickly through oxidation of primary organic aerosols in humid conditions. This process may explain the decrease in secondary organic aerosol concentrations between 2013 and 2018.
Scientists from Okayama University have demonstrated high-performance gas molecule confinement with boron nitride nanopores, surpassing activated carbon. The study found that the nanoporous structure of p-BN allows for strong interaction between nitrogen and its pores, leading to higher adsorption rates.
Researchers from Waseda University and ENEOS Corporation discover a novel indium oxide modified with copper that exhibits a record-breaking CO2 conversion rate of 10 mmol/h g at relatively modest temperatures. This breakthrough could significantly contribute to reducing carbon footprint and driving towards a more sustainable future.
A UVA-led team has been awarded $600,000 to develop a new coating that will enable a niobium alloy to perform at 1800°C. The HERO coating aims to increase the materials' temperature tolerance by 200 degrees Celsius, addressing a critical challenge in turbine engine technology.
Researchers at Berkeley Lab have developed new methods for producing cerium-134, a radioisotope that could serve as a tunable PET imaging surrogate for several alpha-emitting therapeutic isotopes. This breakthrough enables the creation of single molecular systems for both diagnosing and treating cancer in real time.
Researchers explored oxidation mechanisms in Yb-Si coatings at high temperatures under different atmospheres. The study found that the Yb to Si ratio affects oxidation behavior and that ytterbium content can suppress SiO2 growth, leading to more heat-resistant coatings.
A new study reveals that a ubiquitous additive in vehicle tires, 6PPD-quinone, turns streams toxic and kills coho salmon. The highly toxic compound is deadly to juvenile salmon at concentrations as low as 1 microgram per liter.
Researchers found that particulate matter's oxidative potential, not just its amount, is the main health risk. The study suggests urban areas have higher oxidative potential and more harmful effects on health than rural areas.
A study published in The American Journal of Clinical Nutrition found that high-protein total diet replacements led to higher energy expenditure, increased fat oxidation, and negative fat balance compared to a typical North American diet. This suggests that these diets may be a promising nutritional strategy for weight management.
Researchers have discovered a new electrocatalyst, Hf2B2Ir5, that exhibits high activity in the oxygen evolution reaction during water electrolysis. The material's cage-like crystal structure and cooperative phases enable stable and efficient performance over long periods.
Researchers at Arizona State University have developed a new method for creating ultrafast laser experiments on uncharged iron oxide clusters, which could lead to the creation of more efficient industrial catalysts. The study reveals how changes in atomic composition affect stability and reactivity of these fragments.
A new multi-scale approach reveals that fracturing and erosion at the surface set the pace of oxidation in deep underground rocks. The team found that microorganisms can form on pyrite, but geologic processes slow the reaction, preventing acid accumulation.
Researchers explore ascorbic acid's role in organic synthesis, revealing its potential as a catalyst for diverse reactions and its unique mechanistic pathways. This study contributes to green chemistry by demonstrating the versatility of ascorbic acid in environmentally benign processes.
Researchers have developed a catalytic system that directly installs the trifluoromethyl group onto arenes using trifluoroacetic acid. The new reaction offers a milder alternative to existing strategies and has been successfully applied to a diverse array of arenes and heteroarenes.
Researchers from Ruhr-Universität Bochum have discovered that water molecules facilitate oxygen dissociation in aqueous solutions, reducing energy costs by 25%. This breakthrough helps explain the high catalytic activity of gold nanoparticles on metal oxides for selective oxidation.
Researchers developed a new strategy to boost photocatalytic CO2 reduction by improving photosensitization ability of Ru-based PSs. The study found that adjusting excited state population and lifetime can significantly enhance sensitizing ability, with Ru-3 showing over 17 times higher sensitizing ability than typical Ru-1.
Scientists developed hollow structured photocatalysts with controllable spatial location of active metals, chemical compositions, and tunable shell thickness. AuPt@HMZS nanoreactors exhibited excellent catalytic activity in cinnamyl alcohol oxidation under visible light.
UCLA chemists have reported the key chemical discovery necessary for creating a small, electronic marijuana breathalyzer. The research uses electricity to change the chemical structure of THC, the primary psychoactive ingredient in marijuana, making it easier to detect whether a person is impaired.
Researchers at UC Santa Cruz have developed a new method for separating the stereoisomers of an oxidized amino acid, opening up new opportunities for studying its role in biological processes. The method uses supercritical fluid chromatography to purify the stereoisomers with high purity.
Scientists from Trinity College Dublin have discovered that TLR2 plays a critical role in the development of retinal degeneration, a leading cause of blindness. The study suggests that regulating TLR2 activity may help prevent dry AMD, offering new avenues for therapy.
A recent study by the University of California, Riverside found that e-cigarette users have elevated biomarkers of exposure and potential harm, including zinc excess correlated with oxidative DNA damage. The study highlights the risks of prolonged e-cigarette use and advises physicians to exercise caution when recommending e-cigarettes.
Scientists at Tokyo Institute of Technology discovered that copper oxide particles on the sub-nanoscale are more powerful catalysts than those on the nanoscale, catalyzing aromatic hydrocarbons' oxidation reactions far more effectively. The smallest CunO subnanoparticles showed superior catalytic performance and longevity.
Researchers from TUM have identified a new role for the alpha-A-crystallin protein in protecting other proteins from oxidation, which may contribute to the prevention of cataracts and age-related blindness. The study reveals that oxidized alpha-A-crystallin can transfer disulfide bridges to other proteins, influencing their redox state.
Researchers discovered that bacteria can degrade solid bedrock by oxidizing iron and extracting energy from it. The study found that these microorganisms use proteins on their outer surface to move electrons, allowing them to 'munch' rocks without taking minerals into their cells.
Researchers have discovered that avocatin B, found only in avocados, counters incomplete oxidation in skeletal muscle and the pancreas, reducing insulin resistance. The study found significant weight loss and improved insulin sensitivity in mice fed with a high-fat diet supplemented with AvoB.
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.
Researchers at Kazan University's In-Situ Combustion Lab have studied the combustion behavior of aromatic compounds and their impact on heavy oil extraction. The study found that certain aromatic compounds can promote high-temperature oxidation and inhibit low-temperature oxidation, leading to more efficient extraction methods.
A team of researchers has discovered the molecular basis of fireworms' bioluminescence, revealing a novel chemical structure for luciferin. The findings provide insight into a completely new mechanism of light emission and hold potential for developing new bioluminescence-based applications.
Scientists from the López Group study Pt single atoms supported on CeO2, proposing a dynamic charge that enables CO-oxidation at 150ºC. This new concept explains the unique reactivity of activated single platinum atoms, meeting the DOE emissions challenge.
A team from the University of Córdoba studied protein oxidation in western Mediterranean mice to detect environmental pollution levels in Doñana National Park. The research found high levels of oxidation in rice fields near the park, highlighting the presence of pollutants in the area.
Scientists unveil rigorous quantum mechanical definition of atomic oxidation number, enabling accurate simulations of charge transport in ionic systems crucial to energy technologies and planetary science research. This breakthrough resolves a long-standing conundrum in condensed matter physics.
Scientists at Brookhaven National Laboratory and the University of Arkansas developed a highly efficient catalyst for extracting electrical energy from ethanol. The catalyst steers ethanol down an ideal chemical pathway, releasing its full potential of stored energy, enabling applications such as liquid fuel-cell-powered drones.
Researchers found that microaerobic Fe(II) oxidation coupled to carbon assimilation processes driven by microbes from paddy soil. The study identified the potential microaerophilic Fe(II)-oxidizing bacteria in paddy soil and confirmed their ability to couple iron cycling with carbon transformation.