Articles tagged with Isoprene
Combustion-related isoprene emissions from outdoor biomass burning and residential fuel use contribute substantially to the formation of wintertime secondary organic aerosols. The study found that combustion-derived isoprene accounts for 25-40% of winter SOA in northern regions.
The Amazon rainforest is a significant source of condensation nuclei for clouds, according to two studies. The rainforest's plant transpiration and thunderstorms produce aerosol particles that can be transported thousands of kilometers, influencing marine cloud formation.
A recent study published in Nature found that isoprene, a naturally occurring organic compound emitted by vegetation, significantly contributes to the formation of new particles in the upper troposphere. Isoprene oxygenated organic molecules can rapidly form new particles under certain conditions.
A study by the University of Helsinki found that oxidized organic molecules from Amazon rainforests contribute to the formation of aerosol particles in the tropical free troposphere. These molecules, primarily composed of isoprene, can nucleate or condense on nanoparticles, impacting cloud formation and global climate.
Researchers found that boreal wetlands are a substantial source of isoprene and terpenes, contributing to the formation of secondary organic aerosol and ozone. The emissions from these wetlands exhibit a strong exponential temperature response, making them a significant concern in a warming climate.
Researchers created a dual temperature control system to improve isoprene production in S. cerevisiae, achieving 34.5% and 72% improvements in cell growth and isoprene yield respectively.
Researchers created an unnatural monoterpene skeleton using nickel catalysis, enabling enantioselective transformation of bulk chemical isoprene. This work provides a new approach to access terpenoids with different biological activities.
Scientists at the University of Copenhagen have discovered a new class of highly reactive chemical compounds called hydrotrioxides. Formed during atmospheric decomposition of substances like isoprene and dimethyl sulfide, these compounds are stable enough to react with other atmospheric compounds.
Researchers from TROPOS, University of Copenhagen, and Caltech have successfully detected hydrotrioxides (ROOOH) under atmospheric conditions. The formation of these compounds has been estimated to occur through the oxidation of isoprene and other hydrocarbons, with potential implications for health and environmental studies.
A recent study by Oregon State University reveals that a type of bacteria called SAR11 consumes acetone and isoprene, volatile organic compounds produced by phytoplankton. These findings suggest that the marine carbon cycle is not fully understood and highlights the importance of studying plankton's role in gas exchange.
Researchers at the Paul Scherrer Institute have found that isoprene, a dominant non-methane organic compound emitted into the atmosphere, can form up to 20% of secondary organic aerosols in clouds. This process affects Earth's radiation balance and climate change.
A new study by UC Berkeley chemists found that vegetation, particularly trees and green plants, are a significant source of aerosol pollution in Los Angeles. The researchers estimated that 25% of the aerosols come from vegetation, with many tree species producing volatile organic compounds.
Researchers provide first global satellite measurements of isoprene, a natural hydrocarbon affecting Earth's atmosphere. Isoprene reacts with pollutants and reduces atmospheric capacity to scrub itself of pollutants.
Researchers have discovered a new way that plants regulate volatile isoprenoid emissions, which contribute to hydrocarbons released into the atmosphere. This knowledge could lead to optimizing forest land and farming areas by planting fewer high-emitter-plants and more zero-emitters.
Research collaboration discovers genetically modified poplar trees can grow and produce biomass without emitting harmful isoprene. The modification allows trees to adjust to climate stress through natural seasonal cycles, retaining their growth potential. This breakthrough could lead to more sustainable forest plantations.
Field trials show that suppressing isoprene production in poplars has no significant impact on woody biomass production. The findings suggest that isoprene emissions can be diminished without affecting productivity in temperate forest plantations.
Researchers genetically modified poplar trees to reduce negative impacts on air quality, finding they can grow as well as non-modified trees. The study suggests that these modifications may help improve biomass productivity and plant health without impairing growth.
A team of engineers at Purdue University conducted a study using thousands of sensors in an office building to identify indoor air contaminants. They found that people and ventilation systems greatly impact the chemistry of indoor air, with volatile organic compounds lingering even after occupants leave.
Researchers measured VOC concentrations using unmanned aerial vehicles over central Amazonia's plateau and slope forests. Isoprene levels were found to be significantly higher in near-canopy atmosphere over plateau forests compared to slope forests.
Researchers analyzed data from Fresno and Bakersfield before, during, and after the California drought to understand its impact on ozone air quality. They found that severe drought conditions led to a 20% decrease in ozone production due to reduced isoprene concentrations and altered VOCs.
Scientists employed complementary techniques to investigate the reactivity of isoprene at the water interface, finding that oligomers formed exclusively in electrosprays. Computer simulations confirmed these results, highlighting the importance of surface-specific techniques when studying interfacial processes.
Researchers at Max Planck Institute for Chemistry found that isoprene levels in cinema air correlate with film age ratings. The study measured over 13,000 audience members during 135 screenings of eleven different movies, providing a reliable indicator for deciding how movies should be classified.
The Amazon rainforest emits at least three times more isoprene than previously thought, influencing ozone levels and greenhouse gas balance. Isoprene emissions vary with terrain elevation and increase at higher altitudes, sparking hypotheses for further research.
A new study suggests that climate change may extend the ozone season in the Southeastern United States, potentially leading to record ozone days in the fall. As drought-stressed trees emit more of the precursor compound isoprene, air quality becomes more sensitive to climate change.
Researchers discovered that isoprene, a common natural chemical found in human breath, increases significantly at hypoglycemia levels. This finding may lead to the development of new tests for detecting hypoglycaemia and reducing its risk of life-threatening complications.
Research finds that isoprene emitted by trees can influence ozone production in the St. Louis area, particularly at night and into the morning. The study suggests that a specific combination of nighttime chemistry and morning isoprene emissions can drive elevated ozone levels in urban areas downwind of major deciduous forests.
Scientists at the Max Planck Institute for Chemistry and Johannes Gutenberg University found that every movie leaves a characteristic pattern in the air, with increases in carbon dioxide and isoprene levels indicating suspense or humor. The study uses mass spectrometry to analyze exhaled air and differentiate between scenes in movies.
A recent study by Leibniz Institute for Tropospheric Research and Institute of Catalysis and Environment in Lyon reveals that oceans produce significantly more isoprene, a gas formed by both vegetation and oceans. This finding suggests that the climate models need to be improved to accurately predict temperature and precipitation changes.
Researchers at Jülich's Institute of Energy and Climate Research have successfully recreated the natural conditions for isoprene degradation, demonstrating efficient hydroxyl radical regeneration. This process takes place faster than previously thought and produces fewer climate-damaging ozone molecules.
New research reveals how trees produce particulate matter through the chemical reaction of isoprene with nitrogen oxides. This mechanism helps predict air quality episodes and impacts public health and climate change. Trees' natural defense against oxygen damage plays a surprising role in creating environmental concerns.
Isoprene-degrading bacteria discovered near coastal zones, improving models of climate change and environmental factors. These microbes also break down alkanes, potentially aiding oil-degrading survival between spills.
Scientists have developed a revolutionary technology to produce isoprene, a key tire ingredient, from renewable biomass sources such as sugar cane and switchgrass. This innovation aims to reduce the tire industry's reliance on crude oil and create a more sustainable future.
A team of researchers from Caltech and University of Copenhagen have discovered a new chemical compound in the atmosphere that may help explain how clouds form over forests. The compound, dihydroxyepoxide, is formed when tree-released hydrocarbons interact with atmospheric compounds, providing a missing link in cloud formation.
Researchers at Caltech have identified epoxides as a key player in atmospheric chemistry, finding that these chemicals can form secondary organic aerosol. This process has significant implications for human health and climate change.
Scientists found that isoprene emission from plants protects against heat stress and improves photosynthesis efficiency. The study used genetic engineering techniques to reduce isoprene emission in transgenic Grey poplar trees, which showed increased tolerance to heat shock.
A new mechanism has been discovered linking chemical emissions from ocean phytoplankton to increased cloud cover, which could impact global climate models. The study found that airborne particles produced by oxidation of the chemical isoprene may contribute to a doubling of cloud droplet concentrations.
Researchers found that isoprene emitted by forest vegetation forms hygroscopic compounds affecting cloud formation, rainfall, and climate. The discovery demonstrates a link between isoprene emissions and water-soluble fine particles.
A CU-Boulder study suggests that elevated CO2 concentrations in agriforests can reduce isoprene emissions, a key contributor to ground-based ozone pollution. This finding could have significant implications for mitigating regional ozone pollution and enhancing climate mitigation strategies.
Researchers studying isoprene emissions from oak trees in Houston have found that these reactions can lead to increased ozone production and ground-level air pollution. The study aims to understand the critical steps in this process to mitigate environmental damage.