Articles tagged with Chemical Composition
Researchers at Skoltech have created an optoacoustic endoscopic probe that can analyze atherosclerotic plaques by forcing molecules to sound their presence. The device uses laser light to make biomarkers oscillate, producing ultrasound signals that can be detected by a sensitive microphone.
A team of researchers found evidence that solar wind altered the chemical composition of ancient asteroid grains, producing water molecules and providing a possible source for Earth's oceans. The discovery could help future space missions find sources of water on airless worlds.
Researchers have developed a new light-emitting material that doubles the intensity of existing LEDs while also being more energy-efficient. The material, cerium-doped zinc oxide, has the potential to be used in commercial LED lighting applications and could make lighting more affordable for households and businesses worldwide.
Researchers found that combining zinc oxide with small-molecule UV filter ingredients reduced UVA protection by 84.3-91.8% compared to non-mineral sunscreens. The study also showed toxic effects on zebra fish embryos when exposed to sunscreen mixtures containing zinc oxide.
Researchers at GlaxoSmithKline and CCDC combined proprietary and published datasets to train machine learning models for predicting stable polymorphs in new drug candidates. The approach leverages the large volume and variety of data in the Cambridge Structural Database, resulting in more confident predictions and improved model accuracy.
Researchers Boevé and Giot translated insect defense chemicals into sounds, measuring human reactions. The study found that the responses by ants and humans are correlated, indicating that sonification can approximate real-world predator-prey interactions.
Researchers developed avidin-conjugated nanocellulose, enabling attachment of biotinylated molecules and promoting 3D cell culture. The material supports efficient integrin signaling and high cell viability, indicating its suitability for applications like cell differentiation and tissue engineering.
A study using ALMA revealed that protoplanetary disks around five young stars are factories of organic molecules, including nitriles implicated in the origins of life. The discovery provides insights into planetary system formation and whether these systems have what it takes to host life.
Researchers found that saliva protein adsorption is influenced by biomaterial surface properties, countering previous studies. The study lays groundwork for improving medical and dental implants' success by controlling the adsorption of proteins from blood plasma.
A team of Beckman researchers developed software to boost infrared imaging-based cancer diagnosis, enhancing image resolution and accelerating recording speeds. The software integrates data analysis and reduces limitations associated with IR imaging, making it faster and more accurate.
Researchers have developed a way to precisely control defects within active liquid crystals by changing the gradient of activity around them. This can be achieved through pulses of light or chemical composition changes, enabling controlled movement and behavior of these materials.
A new indicator called sea color has been proposed by a scientist at Hiroshima University to predict volcanic unrest in submarine volcanoes. The researcher analyzed satellite images of Nishinoshima Island and detected signs of looming eruption approximately a month before the actual event, using sea discoloration data obtained from space.
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.
Researcher Dr. Igor Ivanishin is investigating the impact of varying calcium contents on dolomite and calcite mineral stability, which can lead to improved well stimulation operations. His findings suggest that injected acids may unevenly dissolve rock in carbonate reservoirs, leaving some areas untouched.
Researchers have dated the oldest stars in our galaxy with unprecedented precision by combining data from their oscillations with information about their chemical composition. The team found that these ancient stars were originally part of a satellite galaxy called Gaia-Enceladus, which collided with the Milky Way early in its history.
A recent study by the Institute of Atmospheric Physics found that indoor aerosol species are primarily from outdoor air exchange. The researchers measured indoor PM2.5 concentrations and chemical compositions, revealing differences in organic aerosol due to temperature changes. Improved ventilation strategies may actually increase expo...
Researchers at the University of Central Florida have developed a new method to analyze tire skid marks and identify vehicles involved in crimes. By classifying the chemical profile of tires, forensic scientists can link vehicles to potential crime scenes, providing valuable evidence for investigations.
A study of 50 protoplanetary-disk forming regions found differences in the abundance of complex organic molecules, with some regions having higher concentrations of methanol and acetonitrile. The findings suggest a possible common production mechanism for these molecules, shedding light on their formation in space.
A recent study published in Environment International found that bioplastics contain high levels of toxic chemicals, similar to conventional plastics. The researchers tested 43 different plastic products and found that 80% contained more than 1000 different chemicals.
Most of Stonehenge's sarsen megaliths originate from West Woods, Wiltshire, according to a new analysis. The study used advanced techniques to determine the stones' chemical composition, revealing a common origin for the massive boulders.
Researchers at the University of Alberta and Universidad Autónoma de Zacatecas developed a new method to analyze urinary metabolome in healthy newborns. The study provides reference data for 86 previously unmeasured chemicals in newborn urine, enabling more accurate diagnoses.
Research reveals bedrock composition limits vegetation productivity in Southwest China's karst region, influencing soil formation and water retention. The study provides a crucial tool for optimising land use and assessing ecosystem resilience to climate change.
Northwestern University chemists create molecules with specific chemical products and arrangements of atoms, suitable for drug development. The catalyst can be reused for additional reactions, producing high yields.
A research team from the University of Cologne has recalculated the distribution of volatile elements on Earth, finding that some building blocks have a chemical composition similar to primitive meteorites. The study suggests an alternative source for vital components such as water and carbon.
Researchers discover varied chemical composition in mantle materials, contrasting with mid-ocean ridge lava. The team's findings suggest that the mantle is not well-mixed and that different rocks melt at different temperatures.
A new analysis of oceanic crust cores has found distinct sections of rock with different chemical make-ups in the mantle. This variability could be linked to recycled oceanic crust and its interaction with the surrounding mantle.
Researchers found a star in the Milky Way Galaxy with low magnesium levels and high Europium levels, indicating it formed elsewhere, likely in a now vanished dwarf galaxy. The discovery suggests galaxy evolution models are supported by the presence of similar chemical signatures in other stars from dwarf galaxies orbiting the Milky Way.
Astronomers using ALMA have detected complex organic molecules around the young star V883 Ori, similar to those found in comets in our Solar System. The distribution of these molecules has a ring-like structure with a radius of 60 au, which is twice the size of Neptune's orbit.
Researchers collected microplastic samples from different levels of the Baltic Sea and identified 33 types of contaminants, including nylon and polyethylene. The new method allows for clear identification of chemical composition, which is crucial for understanding ocean pollution.
Researchers found unexpected chemical compositions in 'magic nanoparticles' that display enhanced stability, including Fe6O4 and Ce3O12. The study also reveals oxygen-rich nanoparticles may explain carcinogenicity of oxide nanoparticles.
Researchers from Russia and Germany uncover a new gold compound, AuTe2, with incommensurate modulation in its crystal lattice. This discovery solves the long-standing mystery of calaverite's crystal structure, providing insights into its electronic spectra and superconducting capability.
Researchers developed a precise method to analyze the chemical composition of suspended particulate matter, including isomers. This technique combines chromatography and mass spectrometry, providing accurate results and full reproducibility.
Researchers discovered the crystal structure of Na2B30, a superhard boride, and found it stable under standard conditions. The study reconciled long-standing debates over its formula and properties.
Scientists at the University of Córdoba have devised a new system to analyse the smell generated during composting using NIR spectroscopy and chemometrics. The method provides a fast and economical means of evaluating odour emission rates, potentially mitigating the odorous impact of composting.
A team from Aarhus University has discovered a star with similar characteristics to the Sun, allowing for the observation of its 7.4-year cycle. The star's heavy elements led to stronger magnetic field variability and surface rotation patterns. This study could help understand how the Sun affects our climate.
Researchers found that monocultural cocoa groves subjected to stress conditions produce slightly more antioxidants and phenols than agroforest settings. The differences in chemical composition were not significant, but the researchers suggest these variations could contribute to variability in cocoa bean flavor.
A small study found that the new chemical composition of poppers is linked to retinal damage, with symptoms starting within hours or days of inhaling the substance. Most patients fully recovered after stopping drug use, but some experienced prolonged visual effects.
Researchers found that compost can establish growing media pH similar to limestone, reducing the need for peatmoss and limestone. Compost provides supplemental nutrition, suppresses disease-causing organisms, and can be used as a limestone substitute for pH establishment.
Researchers at the University of Houston have developed a new technique using near-infrared light to measure chemical composition in materials. The technique enhances sensitivity by 10,000 times, making it suitable for water-based samples and allowing for more detailed analysis.
A new concept in liquid battery design uses a passive, gravity-fed arrangement to eliminate the need for complex plumbing systems, reducing cost and increasing simplicity. The system can be adjusted by changing the angle of the device, allowing for faster or slower energy production.
Scientists developed a new method to understand how volcanic ash interacts with jet engines. The research found that volcanic ash may melt and stick more readily inside engines, leading to severe underestimates of thermal hazard.
The University of California, Davis has been awarded contracts for two major federal fine particle air quality monitoring networks: IMPROVE and CSN. This will provide data that helps inform national air quality standards and regulations, with a focus on visibility and human health in urban areas.
Scientists have discovered that chemicals widely used as refrigerants can degrade in the atmosphere to form a potent greenhouse gas called carbon tetrafluoride (CF4), lasting up to 50,000 years. This finding highlights the need for understanding the chemistry of compounds used in industry to mitigate long-lived atmospheric effects.
Fischbach's work on the Eötvös Experiment led to a reevaluation of data suggesting a possible new force in the universe. Despite no experimental confirmation, his theory has stimulated novel experiments and theories, including the quest for new macroscopic fields of gravitational strength.
The e-cigarette special issue covers topics such as market trends in U.S. retail, use among young people, and chemical composition of e-cigarettes. Key findings include confusion about e-cigarettes' safety and potential for innovative research.
Scientists discovered that surface oxidation significantly impacts thermal conductivity in silicon nanostructures, allowing for a huge reduction of heat conduction. Removing native oxide improves thermal conductivity, while successive re-oxidation lowers it again.
Scientists have created global-scale maps of Mercury's surface chemistry, revealing previously unrecognized geochemical terranes with distinct compositions. The presence of these terranes has important implications for the planet's history and evolution.
Researchers at Berkeley Lab set a new record for X-ray microscopy, achieving resolutions of five nanometers using soft X-rays and ptychography. This breakthrough enables the visualization of chemical phase transformations and mechanical consequences at the nanoscale.
Researchers have developed a model to estimate the effect of Earth-like planet ingestion on star chemical composition. By analyzing twin stars with planets, they found significant changes in refractory element abundance, supporting the connection between exoplanets and stellar hosts.
Researchers analyzed eight oil-soaked sand patties collected along Gulf shores, finding large amounts of water-repelling hydrocarbons that can harm wildlife. The study aimed to assess the environmental impact of persisting oil remnants and improve understanding of their toxicity.
A team of MSL scientists analyzed a martian rock called Jake_M, which is highly enriched in sodium and potassium, making it chemically alkaline. The analysis suggests that parts of Mars may be more like Earth than previously thought, with the rock possibly forming from partial melting of rocks deep inside the planet.
Researchers at the University of Alberta have identified over 3,000 chemicals in human urine, expanding the list from just 50-100 previously known compounds. This discovery is expected to revolutionize medical testing, enabling fast, cheap, and painless tests using urine instead of blood or tissue biopsies.
Researchers introduced a new method to design bicycle parameters according to a rider's body dimensions, improving comfort and performance. The method uses a double-crank-and-rocker mechanism to calculate the ideal crank length and seat height for each rider.
Researchers developed a method to analyze confiscated indoor fireworks using four techniques, revealing hazardous substances like methanol and boric acid. The technique can be performed with mobile devices and provides conclusive scientific tests on the nature of these liquids.
Researchers have developed a new technique for analyzing the local chemical composition and structure of nanoscale materials. The nano-FTIR instrument uses thermal radiation to focus light onto a sample, allowing for high-resolution imaging and spectroscopy of single nanoparticles or devices.
Researchers at Caltech discovered a material that does not expand when heated, like most metals, and behaves like a metal with an entirely different chemical composition. By applying high pressure, they created nonexpanding metal alloys by forcing electrons into new states.
Researchers found heavy negative ions in Titan's upper atmosphere, which may form complex molecules essential for life. The discovery poses questions about atmospheric chemistry and aerosol formation, suggesting that these ions form in the upper atmosphere before reaching the surface.
ChemxSeer is a search engine designed specifically for chemical formulae, allowing scientists to find relevant research on CH4 or methane without filtering out results about Channel 4. The tool identifies related chemicals with different formula representations and substructures, providing more accurate search results.
Academics have identified significant differences in chemical composition between healthy faeces and faeces from patients with infectious diarrhoea, such as Clostridium difficile. This breakthrough could lead to the development of a rapid diagnosis device, saving time and money.
Scientists have successfully mapped the chemical composition of lipid membranes at the nanoscale, shedding light on their dynamic behavior and structural organization. This breakthrough uses Secondary Ion Mass Spectrometry (SIMS) to analyze membrane components, offering new insights into cell function and vulnerability to viruses.