Articles tagged with Gases
Researchers at George Mason University are conducting a NASA-funded project to model telluric absorption features using iSHELL stellar spectra and line-spread functions. The goal is to improve EPRV measurements with high precision, enabling the detection of exoplanet atmospheres.
Scientists observe significant reduction in CFC-11 emissions from eastern China and globally, following reported spikes in recent years. The decrease is attributed to successful actions taken to stamp out illegal production of the ozone-depleting chemical.
Researchers found that tiny aerosol particles form out of next to nothingness over the open ocean when sunlight reacts with molecules of trace gases. These newly formed particles then grow to attract water vapor, forming clouds that reflect or absorb sunlight, affecting Earth's temperature.
Scientists investigate the structural stability, electronic states, and transformation of crystal phases of a recently identified polymorph of gallium selenide monolayer. The study reveals that the new phase is metastable, with stability reversing upon applying tensile strain, and large energy barriers for phase transitions.
Scientists at Tomsk Polytechnic University discovered that xenon positively affects physicochemical, mechanical and biological properties of calcium phosphate coatings used in oral and maxillofacial surgery, orthopedics, and traumatology. The coatings formed using xenon show better adhesion, which prevents peeling off too quickly.
JILA scientists use an electric 'knob' to control molecular collisions and raise or lower chemical reaction rates in ultracold gases. The ability to manipulate these reactions enables the design of novel chemicals, new platforms for quantum computers, and precision measurement tools.
Researchers discovered a significant decrease in chemical diversity and quantity of gases released by corals during heat stress experiments, indicating potential impacts on coral resilience. The study highlights the importance of understanding the 'smell' of corals as an indicator of reef health.
The study found that Earth's early atmosphere was slightly oxidizing, with carbon dioxide as its main constituent, and had a surface pressure much higher than today due to the hot surface.
Researchers found that the COVID-19 virus can survive on surfaces for hours due to a nanometer-thick liquid film clinging to the surface. This survival time is orders of magnitude longer than typical respiratory droplet drying times, emphasizing the need for frequent disinfection and heating surfaces.
A team of scientists has developed an AI-powered 'electronic nose' to assess meat freshness accurately. The device uses a barcode that changes color over time in response to gases produced by decaying meat, and a smartphone app powered by artificial intelligence.
Researchers developed a new material that can separate CO2 from industrial waste gases, natural gas, and biogas without chemically binding it. The process is energy-efficient and cost-effective, making it an important contribution to climate protection and sustainable industrial production.
A team of MIT chemical engineers has developed a system to continuously remove carbon dioxide from waste gases using an electrochemically assisted membrane. The membrane's permeability can be switched on and off at will, allowing for continuous operation without moving parts or wasted space.
Researchers at the University of Virginia are working on a project to improve the durability and efficiency of air-breathing hypersonic engines. Using advanced laser techniques, they aim to capture snapshots of gas-phase combustion reactions in supersonic environments.
Researchers created model simulations of the 1257 CE Mount Samalas eruption using tree-ring records and emissions data. The study found that as little as 1% of halogen released from the eruption reached the stratosphere, suggesting potential for substantial ozone depletion despite small amounts.
A new study has identified major gaps in the international ozone treaty, which must be addressed to avert stronger climate change and serious risks to human health. The treaty's loopholes include unaccounted for CFC and HFC emissions, leakages from old air conditioners, and emissions of nitrous oxide from agriculture.
Scientists used an 'ocean-in-a-lab' to show that air pollution can change the makeup of gases and aerosols released by sea spray, influencing atmospheric composition and weather. The study found that adding pollutants like hydroxyl radicals transformed microbe-produced gases into new compounds.
Researchers found that MOFs become more insulated when filled with gases, contrary to expectations. This discovery poses challenges for the use of MOFs outside research labs and highlights the need for further investigation into their properties.
A team of scientists installed an optical seismometer on La Soufrière de Guadeloupe volcano's summit to monitor gas and steam eruptions. The instrument collects data that will be combined with other observations to better understand the volcano's explosive potential.
Jun-Hong Liang, an LSU associate professor, has received a five-year NSF CAREER award to support his research on ocean bubbles and their impact on upper ocean dynamics and air-sea gas exchange. The award will enable him to develop high-resolution simulations and physics-based formulas to calculate air-sea gas flux, ultimately improving...
Researchers at Brookhaven National Laboratory have developed nanocages to trap noble gases, including xenon and krypton, which can improve nuclear reactor efficiency and reduce radioactive waste. The team plans to scale up the production of these materials with partner Forge Nano.
A lab machine has been developed to mimic the explosion of a giant star, allowing researchers to study the formation of supernovas and their impact on galaxy evolution. The device replicates the blast wave's effects on gas layers, enabling scientists to better understand the creation of beautiful swirls in supernova remnants.
Early oxygen accumulation in Earth's atmosphere dates back to 2.4 billion years ago, with volcanic gases likely holding it back until a less-oxidized mantle became more oxidized, allowing oxygen to flood the air.
An international team of researchers has discovered that ancient carbon stored beneath thick continental crust is released as CO2 during break-up. The study, published in Nature, sheds light on the source of high CO2 fluxes in rift zones.
Researchers warn that a violent Philippine volcanic eruption could lead to an El Niño event, intense polar vortex, and Eurasian warming. The Taal volcano's ongoing eruption has the potential to produce hazardous consequences for the Earth's climate.
The article introduces a new theory of detonation-driven hypervelocity shock tunnels, covering three aspects: special features, detonation driver concept, and interface-matching problem. It demonstrates the successful application of this theory in developing large-scale hypersonic test facilities.
Scientists propose advanced engineering strategies for gas-releasing nanomedicines to enhance bioavailability and safety of therapeutic gases. These nanomedicines aim to maximize profits in gas therapy by providing controlled release and targeting cancer cells.
Scientists have developed an all-fiber optical wavelength converter using few-layer gallium selenide (GaSe) nanoflakes, enhancing efficiency by over four orders of magnitude compared to traditional microfibers. The converter can operate in a wide wavelength range, covering C, L telecom bands and the O band, with minimal power consumption.
The University of Helsinki has established a new standard procedure for analyzing fine particles in experimental chambers, enabling researchers to better understand the mechanisms associated with fine particle formation and its impact on global warming. This standard will help simulate past and future atmospheric conditions, providing ...
Researchers at NIMS developed a solid material that slowly releases hydrogen sulfide (H2S) and nitric oxide (NO), which can induce physiologically favorable effects. This material will facilitate the medical use of these gases, overcoming storage and concentration difficulties.
Emissions of CFC-11 and CFC-12 are larger than expected, with CFC banks slowly leaking these chemicals into the atmosphere, delaying ozone recovery and contributing to climate change.
A new study from Yale University reveals that third-hand smoke can travel into indoor spaces through human contact, exposing non-smokers to hazardous chemicals. The research found that even in well-ventilated areas like movie theaters, people can carry and release third-hand smoke contaminants, posing health risks.
Researchers developed a novel gas imaging system to visualize and measure gases released through the skin in real-time. The system uses VOCs present in circulating blood to diagnose metabolic disorders, genetic diseases, and cancer.
Researchers at Oregon State University have developed a method to computationally design the optimal gas sensor array using metal-organic frameworks. This enables the creation of an electronic nose for detecting air pollutants and diagnosing diseases by measuring gases in a patient's breath. The framework assesses how well different co...
Research suggests that reducing emissions of ozone-forming gases from human activities such as road transport and energy production can improve plant growth and capture more carbon. A 50% cut in these emissions is proposed as a large but plausible target to mitigate ozone-induced loss of plant productivity.
A new study from Carnegie Mellon University sheds light on an under-appreciated source of organic aerosol (SOA) in urban areas, showing that volatile organic compounds (VOCs) contribute significantly to SOA formation. The research reveals that non-traditional VOCs, such as those found in everyday household products, are a major contrib...
A team of researchers discovered that soil can capture NOx gases from the atmosphere and transform them into nitrate through a process called
The new sensor detects hydrogen molecules at concentrations below 2%, outperforming traditional methods that require expensive equipment and trained personnel. Its sensitivity and resistance to interfering gases make it a game-changer for remote hydrogen leak detection.
A comprehensive study by the University of Surrey shows that local activities like construction, vehicle traffic, and domestic heating contribute significantly to Delhi's high air pollution levels. The research highlights a clear trend with higher pollutant levels in winter months, mainly due to crop burning and biomass burning.
Research highlights occupational reproductive hazards for female surgeons in the operating room, affecting physical health and fertility. The study emphasizes the need to mitigate these risks through improved working conditions and safety measures.
Researchers at Skoltech and Heriot-Watt University developed a method to extract methane from permafrost hydrates by injecting flue gases, reducing greenhouse gas emissions in the Arctic. The new technology also reduces carbon dioxide emissions by forming hydrates that replace original methane hydrates.
Researchers found that classical laws of gas mixture behavior fail to apply in the presence of shock waves, affecting combustion, explosions, and supersonic jets. Further study is needed to explore the scope of the problem and develop a new theory explaining the observations.
Scientists have developed a new high-performance optical cavity for terahertz frequencies, increasing the sensitivity of spectroscopic gas analysis. The new technology enables detection of biomarkers in breath and complex gas mixtures found in industrial emissions.
Scientists from Technical University of Munich found that the plug dome's permeability drops significantly as stone alteration increases, leading to an imminent eruption. This discovery enables more reliable prediction of volcanic eruptions, with reduced outgassing being a key indicator of an impending event.
A new prototype device can identify a wide range of airborne gases and chemicals, including harmful compounds like benzene, in real-time. The device uses Raman spectroscopy to detect gas molecules and has been shown to accurately identify airborne pollutants at parts-per-billion concentrations.
A comprehensive study of intestinal gases has been conducted by UNSW Sydney, examining their interactions with the microbiome and associated disorders. The research highlights the importance of gases in maintaining human health and provides a novel tool for analyzing gastrointestinal gases in vivo.
Researchers have discovered a vast reserve of methane in the Earth's oceanic crust, formed through chemical reactions involving seawater and olivine. This finding opens up new possibilities for understanding the origins of life beyond our planet.
Researchers found a significant increase in oxygen levels in ancient rocks, possibly setting the stage for dinosaur expansion into tropical regions. The discovery provides insight into the evolutionary diversification of dinosaurs during a critical period.
Scientists have developed a new technique to visualize gas-liquid collisions using lasers, enabling the study of fundamental molecular interactions. The method captures individual frames of molecular movement, revealing the rough surface of liquids and their impact on atmospheric chemistry.
A new research finding published in Nature has located the source region for about half of the new CFC-11 emissions, which are attributed to an increase of around 7000 tons per year in trichlorofluromethane added to the atmosphere since 2013. This is primarily linked to new production from eastern China.
Researchers have discovered a green material that can replace polluting gases used in most refrigerators and air conditioners. The plastic crystal of neopentylglycol achieves huge cooling effects comparable to conventional coolants.
A new Yale study uncovers key relationship between storm events, ecology, and topography in moderating greenhouse gas release from rivers and streams. Concentrations of three greenhouse gases increase during rainstorms in wetland streams but decrease or remain constant in forested streams.
Researchers at KAUST developed a new sensor using fluorinated metal-organic frameworks (MOFs) that can detect critical gas parameters for human comfort and safety. The MOFs can selectively remove sulfur dioxide from flue gas with high affinity, making them suitable for carbon capture and storage applications.
Researchers developed dyed threads that change color when detecting gases, providing a reusable and affordable safety asset in medical, workplace, military and rescue environments. The threads can detect gases as low as 50 parts per million and work under water.
EPFL researchers found that gas exchange velocity in mountain streams is on average 100 times higher than predicted using lowland stream data. This discovery has major implications for biogeochemical models and highlights the importance of accurate modeling of alpine ecosystems.
A team of Montana State University scientists has discovered a unique and diverse microbial community in a hot spring at Yellowstone National Park. The community, found in the Smoke Jumper Geyser Basin, contains representatives from almost half of all known groups of microorganisms on Earth.
Researchers find evidence suggesting an asteroid/comet impact reignited massive volcanic eruptions in India, coinciding with the worldwide extinction at the end of the Cretaceous Period. The eruptions, known as the Deccan Traps, produced climate-altering gases that may have played a role in the mass extinction.
Researchers at UBC's Okanagan campus have developed a state-of-the-art microfluidic gas detector that can detect small traces of gases quickly and efficiently. The device uses 3D-printed parts to create the microchannel and metal oxide semiconductor, and has potential applications in environmental monitoring, food quality assessments, ...
A new MIT study identifies chloroform as a significant threat to ozone layer recovery, with increased emissions in East Asia potentially delaying the process by four to eight years. The researchers found that production of products from chloroform is on the rise in the region, contributing to the growing problem.
Researchers used neon isotopes to study Earth's mantle formation, finding evidence of rapid early planet formation and delivery of vital compounds. The findings support the idea that a planet must reach a certain size before absorbing these ingredients, which is consistent with observations of other solar systems.
A NASA study reveals that the hydroxyl radical, a molecule that breaks down methane and other greenhouse gases, recycles itself in the atmosphere through reactions with nitrogen oxides and water vapor. This recycling process maintains a steady global presence of OH radicals, potentially extending methane's lifetime.