Articles tagged with Oxygen
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Researchers found evidence of chemical weathering and soil formation at least 60 million years earlier than previously thought. This discovery suggests that oxygen-producing species existed on Earth 3 billion years ago, paving the way for complex life to evolve.
Researchers found that taking off from a compliant surface like a springboard reduces the energy cost of long jumps compared to firm surfaces. This is due to a closer optimal take-off angle for maximum energy efficiency. For shorter distances, no difference was observed in energy expenditure between firm and springy surfaces.
Researchers Zunli Lu and Xiaoli Zhou have confirmed the earliest appearance of dissolved oxygen in ocean surface waters, shedding light on the Great Oxidation Event. Their novel iodine geochemistry approach enables them to measure oxygen levels in ancient rocks, providing insights into marine ecology and global warming.
A research group from the University of Exeter has discovered a possible mechanism behind Earth's rising oxygen concentration. The team suggests that as continents grew, chemical processes on land took over controlling CO2 levels, leading to increased phosphate availability in oceans and ultimately, oxygen production.
The Hawaiian bobtail squid recruits and sustains a symbiotic association with Vibrio fischeri by utilizing the antimicrobial properties of its hemocyanin blood pigment. The protein also enables the squid to modulate oxygen levels, creating an environment conducive to the bacterium's growth.
Scientists have successfully created a stable two-dimensional electron gas in strontium titanate, allowing for the manipulation of its electronic properties. This breakthrough could lead to the development of novel magnetic effects and superconductivity.
Researchers discovered the process by which gas from coniferous trees creates particles that can reflect sunlight or promote cloud formation. The study estimates pine forests as a dominant source of aerosols over boreal regions.
Oxygen production by cyanobacteria may have initiated 3 billion years ago, with dynamic concentrations rising and falling over billions of years. This new understanding sheds light on the balance between photosynthesis and consumption, impacting life on Earth.
Researchers designed an artificial relay based on natural one, improving efficiency and understanding natural process, Nature Chemistry study
Recent experiments have found that lithium bound to carbon walls in fusion devices plays a key role in improving plasma performance. The combination of lithium, oxygen, and carbon improves deuterium retention and reduces recycling, leading to enhanced energy confinement and reduced edge plasma instabilities.
Researchers replicate formation of first silicate dust and find matching oxygen isotopes in stony meteorites, solving long-standing solar system formation puzzle. The discovery suggests a simple physical chemistry principle governed the early solar system.
A team of researchers has documented the removal of oxygen from seawater flowing through the deep ocean's rocky crust, suggesting that microbes are scavenging for energy. This finding provides crucial insights into the survival and thrival of life in the 'deep biosphere' beneath the sea floor.
Researchers found evidence of low atmospheric oxygen concentrations in 3.8 billion-year-old soils from South Africa, challenging previous estimates that oxygen began accumulating in the atmosphere around 2.3 billion years ago. The discovery supports a longer antiquity for oxygen-producing photosynthesis and aerobic life.
Scientists found that ocean currents carrying anammox bacteria produce vast amounts of nitrogen gas in the Pacific Ocean, weakening the ocean's ability to absorb CO2. This process also leads to fewer algae in the water, less food for marine microorganisms and ultimately, a decrease in fish populations.
Researchers from the University of California reveal that Emperor Penguins can dive to over 500m and stay underwater for up to 27 minutes. They also discover a unique heart rate response, slowing down to as low as 10 beats per minute to conserve energy.
An international team of researchers has confirmed theoretically-predicted interactions between single oxygen molecules and titanium dioxide, revealing a new atomic crystal dynamic. This discovery could lead to the development of more active oxygen-rich photocatalysts for converting CO2 into useful hydrocarbons.
Researchers have created an oxygen sponge that can easily absorb or shed oxygen atoms at low temperatures, making it useful in devices such as rechargeable batteries and fuel cells. This discovery could lead to more efficient energy storage and sensor technologies.
Research at Princeton University found that migrating ocean animals consume vast amounts of oxygen in the ocean's 'oxygen minimum zone'. This phenomenon, known as diel vertical migration (DVM), results in oxygen depletion and can be disrupted by climate change.
Biologists discovered that green algae require haemoglobin and nitric oxide to signal the absence of oxygen, allowing them to activate genes and produce hydrogen. In an oxygen-rich environment, this gene is idle, and its inactivation has fatal consequences for the algae.
A £1 million project aims to design and build a reactor vessel that safely uses oxygen in manufacturing processes. This would enable compounds to be oxidised effectively while producing only water as a by-product, reducing toxicity and waste.
Researchers at North Carolina State University have developed a new oxygen carrier that enables chemical looping combustion of natural gas up to 70 times faster. This process captures carbon dioxide while producing water vapor and energy.
Researchers have successfully tested a new clean coal technology that captures 99.5% of carbon dioxide emissions, paving the way for potential commercial use. The technology uses two inexpensive but polluting forms of coal and operated continuously for 200 hours without shutdown.
Researchers reconstructed ancient ocean conditions, finding most deep ocean was anoxic, with limited oxygen and hydrogen sulfide. This discovery challenges our understanding of eukaryote rise and animal emergence.
The VISIONS mission aims to study the auroral wind by launching a sounding rocket into the Northern Lights. The rocket will observe oxygen atoms flowing out of the atmosphere and provide insights into how they gain energy to escape Earth's gravity.
Multicellular cyanobacteria developed over 2.3 billion years ago, coinciding with the Great Oxidation Event that increased atmospheric oxygen levels. This event is considered a significant climate shift, as multicellularity allowed for more efficient metabolism and paved the way for diverse life forms.
Researchers have discovered a unique defence mechanism of the tuberculosis pathogen Mycobacterium tuberculosis, which protects sulphur-containing proteins from oxidation. The protein mycoredoxin-1 plays a crucial role in this repair mechanism, and disabling it may offer new ways to combat the disease.
A team of researchers has found evidence for a dramatic rise in early oxygen levels around 2.3 billion years ago, followed by an equally impressive fall. This drop in oxygen may have ushered in low-oxygen concentrations that set the stage for the evolution of eukaryotic organisms and eventually animals.
Researchers found that naturally-occurring bacteria in the Gulf of Mexico consumed and removed at least 200,000 tons of oil and natural gas from the Deepwater Horizon spill. The study measured how much oil and gas was eaten by bacteria and how its characteristics changed over time.
Researchers at UGA have made a major medical breakthrough by discovering how an oxygen-sensing bacterial protein senses oxygen through reversible structural changes in an iron-sulfur cluster. This mechanism could ultimately lead to a better understanding of the aging process and new treatments for human diseases.
Scientists at Oak Ridge National Laboratory have developed a microscopy technique to map oxygen vacancies in fuel cell materials, which can affect device efficiency. The research aims to improve fuel cells with longer lifetimes and lower prices.
Researchers found that pyrite, also known as fools' gold, plays a significant role in regulating atmospheric oxygen levels. The formation and burial of pyrite has been more important than previously thought, accounting for over 80% of sulfur removed from the ocean.
Researchers at Boston Children's Hospital have developed tiny gas-filled microparticles that can be injected into the bloodstream to quickly oxygenate blood. The infusion restored blood oxygen saturation to near-normal levels within seconds, even in animals with blocked airways.
Researchers studied judo, a complex and unpredictable sport, to understand how athletes spend their energy. They used a portable gas analyzer and mathematical formulas to determine the relative contributions of aerobic, lactic, and alactic anaerobic metabolism.
Researchers at Northwestern University have created a new method to oxidize graphene, overcoming the material's zero band-gap issue. The reversible oxidation process enables tunability of electronic properties, paving the way for high-performance applications.
A team of scientists led by Yingwei Fei found that oxygen is not a major component of the Earth's liquid outer core, contradicting previous models. The discovery has significant implications for understanding the planet's formation through accretion of dust and clumps of matter.
New research suggests that ozone gas emitted from fracturing rocks could indicate impending earthquakes. Different types of rocks produced varying amounts of ozone, with rhyolite producing the strongest emission.
Mathematicians develop new methods to distinguish between knots, leading to the discovery of virtual knots that defy planar representation. These virtual knots give rise to a new branch of knot theory known as generalized knot theory, which emerges as a special case of classical knot theory.
Students at the University of Washington have developed a low-technology solution to turn slash piles into biochar, a crumbly charcoal-like product that helps farmers' soil hold water and nutrients. The new method is estimated to be cost-effective and could transform what was once a big problem into a money-making engine for landowners.
Researchers at Ruhr-University Bochum found that oxygen inactivates enzyme function in three phases, leading to the destruction of biological catalysts. This discovery could help develop more robust enzymes for hydrogen production.
A recent study found that drugs promoting nitric oxide production may improve recovery in critically ill patients with low oxygen levels. NO is produced by virtually every cell and serves important functions including blood pressure regulation, learning, and memory formation.
MIT researchers found evidence that tiny aerobic organisms may have evolved to survive on extremely low levels of oxygen in oceanic 'oxygen oases.' Laboratory experiments with yeast suggest early ancestors could have thrived with minimal O2, reconciling a debate over early Earth's atmosphere.
Researchers at Case Western Reserve University have developed an artificial lung that uses air instead of pure oxygen, achieving efficiencies comparable to the genuine organ. The device is a significant step towards creating easily portable and implantable lungs, with potential use in humans within a decade.
A study published in the Journal of Biological Chemistry reveals that a protein called globin E plays a crucial role in supplying oxygen to the avian retina. This finding helps explain how birds evolved large eyes without a dense network of ocular capillaries, and sheds light on the unique properties of the avian eye.
Scientists have discovered that calcium, aluminum-rich inclusions (CAIs) formed far away from the sun and later fell back into the mid-plane of the solar system. The findings provide new insights into the formation and evolution of our solar system, suggesting turbulent conditions during its early stages.
A gas-giant planet orbiting a sun-like star has been found to be rich in carbon, with rocks potentially made of pure diamond or graphite. The discovery challenges conventional planetary chemistry and raises questions about the possibility of life on this extreme world.
The Cassini mission has discovered an oxygen atmosphere on Saturn's moon Rhea, which is extremely thin and sustained by high-energy particles bombarding its icy surface. The formation of oxygen and carbon dioxide could be a pre-requisite for life, with complex chemistry potentially common throughout the solar system.
Researchers at Queen's University have discovered a way to detect oxygen in complex biomolecular systems, revolutionizing the study of proteins, DNA, RNA and other molecules. This breakthrough allows scientists to examine all four major elements and learn more about their chemical structure and interactions.
Ancient oceanic microbes produced oxygen through photosynthesis, altering Earth's atmosphere billions of years ago. The discovery sheds light on the emergence of oxygen in the oceans, which eventually led to the development of complex life forms.
A team led by Dr. Jonathan Stamler will research the development of a new class of drugs that selectively dilate blood cells under hypoxia, enhancing soldiers' performance at high altitudes. The grant aims to improve tissue oxygenation and deliver more oxygen to tissues despite low blood oxygen content.
Research by Duke University scientists reveals that seawater's higher concentrations of mercury make saltwater fish like tuna and shark more toxic to humans. Methylmercury latches onto dissolved organic matter in freshwater, but tightly binds to chloride in seawater, where sunlight can't break it down as easily.
The Gulf oil spill is threatening to worsen and expand the oxygen-depleted region known as the 'dead zone', a phenomenon caused by urban runoff and nitrogen-based fertilizers. Researchers are analyzing water samples to understand the impact of oil on oxygen levels, which could have devastating effects on marine life.
A breakthrough discovery by Colette Heald simplifies our understanding of atmospheric organic aerosols, a key factor in climate change. By identifying common characteristics among these tiny particles, scientists can now accurately represent their composition in climate models.
A research team from the National Institute of Standards and Technology (NIST) has developed a new method to detect subtle clues to environmental threats affecting blue crabs. By analyzing metabolite levels in blue crab hemolymph using nuclear magnetic resonance (NMR) spectroscopy, they found biomarkers that can identify specific sourc...
A group of UK anaesthetists designed and tested three prototype low-cost ventilators that could provide effective ventilation for patients in emergency situations. The devices operate on a gas-efficient principle and have been shown to consume less oxygen than commercially available ventilators.
Scientists at VIB have identified a bacterial defense mechanism that repairs damaged proteins caused by oxygen. The discovery, using the intestinal bacterium E. coli, has implications for human cells and may provide new insights into protein protection against oxidation.
A UC Riverside-led study found oxygen production via photosynthesis occurred in Earth's oceans at least 100 million years before the GOE, affecting ocean chemistry and potentially stimulating eukaryote evolution. The research suggests that even low concentrations of oxygen can have profound effects on ocean chemistry.
Researchers developed nanosized capsules compatible with various substances for medicine and energy applications. The capsules can carry anticancer drugs or medical-imaging agents to specific locations within the human body. A highly sensitive oxygen sensor was also created, detecting minute amounts of oxygen in confined spaces.
Researchers at Berkeley Lab and UC Berkeley have discovered a mild and relatively inexpensive procedure for removing oxygen from biomass, potentially replacing traditional petrochemical feedstocks. The formic acid treatment converts glycerol into allyl alcohol, used to manufacture polymers, drugs, and other chemical products.
A team of scientists discovered that the Great Oxygenation Event coincided with the first widespread ice age on Earth. The oxygenation of the atmosphere led to a decrease in greenhouse gases, resulting in a significant drop in surface temperatures.
Calculations suggest low-oxygen dead zones in the ocean will expand significantly over the next century. Marine animals will need more oxygen to survive as carbon dioxide levels increase, exacerbating the effects of 'dead zones'.