Articles tagged with Oxygen
A new method for the controlled cleavage of carbon-carbon double bonds in alkenes has been developed using CO₂ as an oxygen donor and visible light. This process replaces traditional oxidising substances with a safer and more sustainable approach, yielding ketones and carboxylic acids.
Black corals' cilia perform various roles, including food transport and internal nutrient circulation. Cilia facilitate oxygen delivery and waste removal through ventilation.
A KAIST research team has developed a new molecular system that can selectively switch the pathway through which electrons are transferred during oxygen activation. The findings provide a fundamental design principle for next-generation catalysts and energy-conversion technologies.
Researchers at Gladstone Institutes found that hypoxia therapy can extend lifespan and improve brain function in mice with motor neuron degeneration. The therapy works by reducing the amount of oxygen available to cells, which can help counteract the effects of defective mitochondrial quality control machinery.
A study led by Erica Heinrich highlights a critical gap in detecting and treating breathing discomfort or dyspnea in ventilated patients. Dyspnea is often hard to recognize, but carbon dioxide levels may be more significant drivers of breathlessness than oxygen levels.
Scientists discovered that oxygen levels in shallow oceans declined about 8 million years before the end-Triassic mass extinction, stressing marine ecosystems. The research provides a rough guide for the future as our oceans undergo acidification and deoxygenation.
A deep learning model combines knowledge from different catalyst families to identify a top-performing green hydrogen catalyst. The AI correctly predicted the activity ranking of 12 tested catalysts within a previously unexplored material family.
Researchers develop a novel NiO/cCeO2 oxygen carrier for efficient low-temperature methane reforming and water splitting, achieving high CO selectivity and nearly pure H2 production. The material demonstrates exceptional stability and performance across a broad temperature window.
Researchers at Rice University have discovered a new way to enable pi interactions between dioxygen and f-block metals like neodymium, creating lanthanide-oxos. This breakthrough could lead to the development of highly reactive molecules as synthetic replacements for iron-oxo.
Scientists at Tohoku University's Advanced Institute for Materials Research have created a more efficient way to turn methane into hydrogen by combining chemical looping with water splitting. This new method achieves low-temperature methane reforming at 500-600°C, significantly reducing energy consumption and carbon emissions.
The Hybrid Oxygenation Bioelectronics system, or HOBIT, shields cells from the immune system while providing access to oxygen and nutrients. The compact device supports higher cell densities in a smaller space, enabling the production of multiple biologic molecules simultaneously.
Decisions on extracorporeal membrane oxygenation (ECMO) for severe respiratory failure rely heavily on clinical judgments rather than objective guidelines. Variability in decision-making may lead to inconsistent allocation of this life-supporting treatment. The study aims to improve ECMO accessibility and equity.
Researchers analyzed the teeth of four European straight-tusked elephants, discovering they migrated up to 300km before reaching their final habitat. The study suggests organized hunting and cooperation between Neanderthals and the elephants.
Researchers at Nagoya University present six advances in gallium oxide thin-film growth, including a world-first result growing the material on low-cost silicon substrates. The new High-Density Oxygen Radical Source doubles atomic oxygen density, promoting chemical reaction and film growth.
Researchers found that noninvasive measures of brain blood flow and oxygenation are associated with hallmark brain changes in older adults with and without cognitive impairment. Higher values on these indicators were linked to lower levels of amyloid plaques and larger hippocampal volume, indicating a lower risk of Alzheimer's disease.
Researchers at Gladstone Institutes discovered that red blood cells act as glucose sponges in low-oxygen conditions, explaining why people living at high altitude have lower diabetes rates. This adaptation fuels efficient oxygen delivery to tissues while lowering blood sugar levels.
Researchers developed a fast and energy-efficient way to produce advanced carbon materials capable of capturing carbon dioxide, dramatically reducing production time while improving adsorption performance. The new material demonstrates exceptional ability to capture and selectively separate carbon dioxide from gas mixtures.
A new study suggests some early life forms evolved to use oxygen hundreds of millions of years before the Great Oxidation Event, potentially delaying oxygen's accumulation in the atmosphere. This discovery adds to our understanding of aerobic respiration and its evolution on Earth.
A large study found that home fingertip oxygen monitors give higher readings for patients with darker skin tones, which can lead to missed diagnoses and delayed medical attention. The researchers suggest interpreting SpO2 readings in context and developing guidance to address these limitations.
A recent study published in JAMA found that initiating resuscitation of preterm infants with fraction of inspired oxygen levels of 0.6 versus 0.3 did not affect the risk of death or brain injury by 36 weeks' corrected gestational age.
Researchers created a powerful catalyst from renewable lignin waste, boosting the efficiency and stability of oxygen evolution reaction in water electrolysis. The new catalyst achieves a low overpotential of 250 mV at 10 mA cm² and maintains strong performance for over 50 hours.
Researchers found that a pyrite-oxidizing microbe preserves up to 90% of atmospheric oxygen in sulfate, offering insights into microbial activity in ancient environments. This discovery could help analyze oxygen isotope data from Martian sediments for signs of life and provide clues to environmental conditions on early Earth.
A new power generation system using liquid oxygen storage has been patented by SwRI and 8 Rivers, aiming to make power plants more efficient and cost-effective. The system utilizes fluctuations in energy demand by generating pure oxygen during off-peak hours, which can then be stored and used later when prices are higher.
A new dual-imaging system simultaneously maps retinal structure and capillary oxygen levels in live mice, allowing researchers to study vision-threatening diseases like glaucoma and diabetic retinopathy. This non-invasive approach offers a powerful tool for elucidating local capillary values and tracking changes in retinal oxygenation.
Researchers at ISTA have discovered a way to tune singlet oxygen, a highly reactive ROS that causes cell damage and degrades batteries. By controlling the pH inside mitochondria, they can produce more 'good' triplet oxygen and reduce the production of 'bad' singlet oxygen.
Rice scientists developed a method to pattern device functions with submicron precision directly into an ultrathin crystal using focused electron beams. The approach created bright blue-light emitting traces that also conduct electricity, potentially enabling compact on-chip wiring and built-in light sources.
A new study using two-photon microscopy shows that brief interruptions in brain capillary flow can cause rapid drops in oxygen levels, potentially leading to tissue damage. The research found that even minor stalls can lead to significant hypoxia, highlighting the importance of uninterrupted blood flow to the brain.
A team of scientists at Pohang University of Science & Technology has developed a novel approach to enhance thermoelectric efficiency by controlling oxygen vacancies. By precisely controlling the number of oxygen vacancies in materials, they achieved a remarkable 91% improvement in thermoelectric performance.
The seminar, part of a DAAD-JSPS collaboration, will cover the latest topics on drug design and treatment protocols for photodynamic therapy. Researchers from Japan and Germany will present their recent research results on PDT, including nano-DDS applications.
Researchers have discovered a way to distinguish identical medicines at the molecular level, allowing for the tracing of counterfeit or stolen medicine. The technology focuses on variants of chemical elements such as isotopes of carbon, hydrogen, and oxygen.
Researchers have developed a method to exploit local microstrain as a precise tuning knob for single-atom catalysts, unlocking record-setting oxygen reduction performance and long-term stability. This breakthrough uses nanoscopic curvature to control bond strain, transforming static motifs into dynamically self-optimizing centers.
Researchers at Göttingen University developed a method to reconstruct the early Earth's atmosphere using fossilized micrometeorites. The study found that intact micrometeorites can preserve reliable traces of oxygen isotopes over millions of years.
Researchers warn that artificial oxygen input cannot replace comprehensive water protection strategies. Technical approaches have shown promise, but risks include intensifying greenhouse gases and disrupting marine habitats. Climate protection and reducing nutrient inputs remain crucial for mitigating ocean oxygen loss.
A new class of materials, clathrates, has been discovered as electrocatalysts for oxygen evolution reaction in green hydrogen production. The Ba₈Ni₆Ge₄₀ material transformed into ultrathin Nickel-sheets under an electric field, increasing catalytic activity and stability.
A new study reveals that human activities such as farming, wastewater, dams, and climate change are causing significant shifts in the global freshwater oxygen cycle. The research shows that inland waters are consuming more oxygen than they produce, making them a growing sink of atmospheric oxygen.
University of Queensland scientists used machine learning to predict when bacteria evolved oxygen use, finding some bacteria used it before photosynthesis. The study suggests aerobic metabolism occurred before oxygenic photosynthesis, dating back around 3.2 billion years.
Researchers created a timeline for bacterial evolution and oxygen adaptation using genomic data, fossils, and Earth's geochemical history. Their findings suggest that some bacteria could use trace oxygen long before evolving photosynthesis.
A recent study identified a quasi-conversion reaction on the cathode surface during discharging, leading to accelerated battery degradation. High nickel content exacerbates this effect.
A Chinese research team has developed an electrochemical process that can directly split CO2 into elemental carbon and oxygen. This innovative method uses lithium as a mediator to produce oxygen with a high yield of over 98.6%, significantly exceeding the efficiency of natural photosynthesis.
Astronomers have discovered oxygen in JADES-GS-z14-0, the most distant known galaxy, revealing a galaxy that is much more chemically mature than expected. The detection suggests galaxies formed rapidly and are maturing rapidly, contradicting previous theories about early universe formation.
Researchers have developed cost-effective and efficient water-splitting catalysts using cobalt and tungsten, which surprisingly increase in performance over time. The unique self-optimization process involves changes in the chemical nature of the catalyzing oxide, leading to improved activity and reduced overpotentials.
Researchers at Tohoku University found that incorporating gadolinium into iron-doped nickel oxide markedly enhances oxygen evolution reaction activity. Gd-doping reduces theoretical overpotentials and demonstrates favorable kinematics, leading to remarkable long-term stability and robust performance in water electrolysis.
New research suggests that volcanic activity billions of years ago accelerated oxygenation, leading to an increase in atmospheric oxygen. This pre-Great Oxygenation Event (GOE) may have provided the necessary conditions for photosynthetic microorganisms to thrive, ultimately paving the way for complex life.
Astronomers observed a bright and chemically complex galaxy, JADES-GS-z14-0, when the universe was just 2% of its current age. The discovery reveals significant amounts of oxygen, suggesting the galaxy had formed stars for potentially 100 million years before observation.
A POSTECH research team has developed a new catalyst using aluminum, improving the performance of hydrogen production in alkaline water electrolysis by approximately 50%. The aluminum catalyst maintained high current density and excellent stability, making it suitable for large-scale hydrogen production.
Researchers at SwRI and U-M have created a new methane flare burner using additive manufacturing and machine learning that eliminates 98% of methane vented during oil production. The burner's design, with a complex nozzle base and impeller, allows for efficient combustion even in challenging crosswind conditions.
Researchers found that functionalizing graphene sheets via plasma treatment can lead to enhanced sensitivity for specific gases, such as ammonia. The study discovered different types of defects created on the graphene sheets depending on the gas used during plasma treatment.
Researchers at HZB and HU Berlin have discovered a high-spin manganese centre, crucial for molecular oxygen formation in natural photosynthesis. The discovery, made possible by BESSY II's unique experimental capabilities, sheds light on the complex process of photosynthesis.
Researchers at Gladstone Institutes developed a drug called HypoxyStat that mimics the effects of breathing low oxygen, extending lifespan by over three times in mice with Leigh Syndrome. The drug reversed brain damage, muscle weakness, and other symptoms of the disease, even when given late in life.
Researchers at Max Planck Institute for Sustainable Materials have developed a novel method to create lightweight, nanostructured porous martensitic alloys by harnessing dealloying and alloying processes. The approach enables CO2-free and energy-saving production of high-strength materials.
Researchers have identified clinoptilolite and biochar as cost-effective options for removing siloxane compounds from landfill gas. These natural materials can enhance the performance of adsorbents with modification techniques, offering an environmentally friendly solution to mitigate damage to energy equipment.
A team of scientists found that carbon and other star-formed atoms don't just drift through space, but are pushed out by giant currents into intergalactic space. These atoms can eventually be pulled back in to form new stars, planets, and moons.
A POSTECH research team developed a groundbreaking strategy to enhance LLO material durability, extending battery lifespan by up to 84.3% after 700 cycles. The breakthrough addresses capacity fading and voltage decay issues.
Researchers at Nagoya University developed a novel porous metal-organic framework (MOF) that combines adsorption and dissolution to separate oxygen from argon. The 'adsorptive-dissolution' mechanism enhances gas separation efficiency and selectivity, with potential applications in industries requiring high-purity oxygen.
A recent study from the University of Missouri found that peripheral chemoreceptors are overactive in adults with type 2 diabetes, leading to increased cardiovascular risk. While high doses of oxygen reduced chemoreceptor activity, it did not improve glucose tolerance or insulin sensitivity.
Researchers at Institute of Science Tokyo have identified key factors driving photochemical water oxidation. By fine-tuning reaction potential and pH conditions, they enhance the efficiency of this process, paving the way for more sustainable energy solutions.
Researchers have discovered a mismatched composition of gases in the planet's atmosphere compared to gases within the disk. The study found that the ratio of carbon and oxygen gases in the planet is much lower than expected, suggesting that current models of planet formation may be too simplified.
High-flow nasal oxygen was found to be more effective than noninvasive ventilation in preventing endotracheal intubation or death within 7 days in four of five patient groups with acute respiratory failure. However, the results were sensitive to analysis models and may require further study in specific patient populations.
A new study comparing early restrictive vs liberal oxygen for trauma patients found no significant reduction in death and/or major respiratory complications within 30 days. The study suggests that the choice of oxygen strategy may not be as critical in trauma care.
Researchers at HZB developed a new P2X catalyst requiring less iridium than commercial materials, showing remarkable stability and different mechanisms for oxygen evolution. The study provides valuable information about catalyst performance and stability.