Articles tagged with Chemical Analysis
Researchers developed a simple method to measure nano/microplastic concentrations in soil using spectroscopy, eliminating the need for separation processes. The method uses a wavelength combination of 220–260 nm and 280–340 nm to accurately quantify N/MPs in different soil types.
Researchers discovered direct evidence of dairy product consumption and processing in the Pyrenees during the earliest stages of the Neolithic. Organic residues on ceramic vessels revealed a mixed economy with integrated agriculture and livestock farming.
Researchers at Harvard University discovered that giant deep-sea vent tubeworms possess two functional carbon fixation pathways, the Calvin-Benson–Bassham (CBB) and reductive tricarboxylic acid (rTCA) cycles. These pathways are coordinated to enable symbionts to thrive in dynamic and harsh environments.
A Bronze Age purple dye workshop has been found on the Greek island of Aegina, featuring tools, ceramics, and snail shells that reveal the production process. The site provides insights into Mycenaean culture and trade during the Late Bronze Age.
Researchers identified 23 previously undetected metabolites in coral reefs, including amino acids and organosulfonic acids. The study's technique can help monitor coral reef health for climate change and other disturbances.
Researchers at Tokyo University of Science have developed a novel approach to directly observe electron transfer in solids using X-ray crystal structure analysis. This breakthrough could lead to advancements in energy storage, nanotechnology, and materials science research.
This study found that lowering the fecal immunochemical test positivity threshold can achieve comparable sensitivity and specificity to the multitarget stool RNA test without additional testing. The findings are similar to previous observations with multitarget stool DNA testing, suggesting a potentially simpler screening method.
Scientists analyzed Martian meteorites to understand the planet's mantle and crust structure. The study found that these rocks are related through a process known as fractional crystallization within a volcano, revealing details about Mars' internal structure and volcanism.
A study by Sylvester Comprehensive Cancer Center found that durvalumab, a targeted immunotherapy for lung cancer, exceeded official cost-effectiveness thresholds in four countries: the US, Brazil, Singapore, and Spain. The drug's high cost-effectiveness ratio was due to its extended lifespan and quality-of-life benefits.
A research team led by UCF's Mário Nascimento De Prá and Noemí Pinilla-Alonso discovered carbon dioxide and carbon monoxide ices on 59 trans-Neptunian objects using the James Webb Space Telescope. The findings suggest that carbon dioxide was abundant in the protoplanetary disk, while the origin of carbon monoxide remains uncertain.
Scientists studied the nickel-tungsten alloy interface to understand its properties and behavior. The research revealed the formation of intermetallic compounds and diffusion-induced recrystallization regions, which significantly impact the material's mechanical, thermal, and chemical properties.
The team developed a deep learning AI technique to quantitatively analyze cation mixing using atomic structure images. This approach revealed that introducing metal dopants like aluminum, titanium, and zirconium into the transition metal layer fortified bonds between nickel and oxygen atoms, curbing cation mixing.
A new AI method developed by Swedish researchers can identify toxic substances based on their chemical structure, potentially replacing animal testing. The method has been shown to be more accurate and broadly applicable than existing computational tools, offering a promising alternative for environmental research and authorities.
Researchers analyzed flour and rice stored in Brazilian homes and found six mycotoxins, including aflatoxin B1 and deoxynivalenol, at high levels, posing significant health risks. The study highlights the importance of proper food storage to prevent contamination.
Researchers at Hokkaido University have developed a cost-effective and high-capacity cathode material for lithium-ion batteries by doping abundantly available elements, such as aluminum and silicon. The addition of these elements forms strong covalent bonds, enhancing the material's cyclability and capacity retention.
Scientists develop new analytical method to detect food fraud in truffles, distinguishing between expensive Piedmont and cheaper spring truffles based on two volatile markers. The method uses automated Solvent-Assisted Flavor Evaporation and has low equipment requirements for routine analysis.
Researchers analyzed wheat-based glues used in historic bookbinding to understand their adhesiveness and degradation. They found that starch glue is more durable and flexible than flour glue, making it a potentially better choice for book repairs.
Researchers have identified cocaine as a contaminant of concern in the Bay of Santos' water, sediments, and marine organisms. The drug causes toxicological effects in animals such as mussels, oysters, and fish, with severe bioaccumulation and ecotoxicological risks.
Researchers propose a new strategy to further enhance the performance of gas sensors using single-atom catalysts. The review discusses the application, structure, and principles of semiconductor-based gas sensors, as well as the mechanisms through which single-atom catalysts improve gas sensitivity.
Researchers analyzed global ambient particulate matter to understand the health risks associated with exposure to airborne trace elements. The study highlights elevated levels of arsenic and other toxic metals in South and Southeast Asia, particularly in Bangladesh, India, and Vietnam.
A Japanese research team analyzed oxygen and nitrogen stable isotope ratios in nitrate to differentiate between sake breweries. The study found a distinct N isotope signature across various types of sake within a single brewery, which could be used as a marker for authentication.
A team of researchers analyzed 49 silver coins from the Fitzwilliam Museum and found a chemical and isotopic signature matching third- to seventh-century silver from the Byzantine Empire. The study reveals a surge in trade involving these silver coins between 660 and 750 AD, which had a significant impact on people's lives. Later analy...
A new statistical-modeling workflow can quickly identify molecular structures of products formed by chemical reactions, accelerating drug discovery and synthetic chemistry. The workflow also enables the analysis of unpurified reaction mixtures, reducing time spent on purification and characterization.
A recent study found that some water-based paints contain volatile organic compounds (VOCs) and other chemicals of emerging concern. The research, published in ACS' Environmental Science & Technology Letters, analyzed the composition of 40 top-selling water-based paints and discovered varying levels of potentially hazardous compounds.
Researchers at Hokkaido University identified 341 different molecular species of lipids in four types of herbal tea, which may contribute to the teas' health benefits. The study reveals significant variations in lipids among the teas, with some containing novel short-chain fatty acid esters and polyunsaturated fatty acids.
Researchers discovered compounds with untapped therapeutic potential for treating BPH, melanogenesis, and nerve damage. Metformin restored sex hormone homeostasis, epimedin B stimulated pigmentation function, and hydralazine suppressed ferroptosis to aid in axon regeneration.
Belgian scientists developed AI models to predict beer ratings and aroma compounds, improving beer quality. The study analyzed hundreds of beers and used machine learning to connect chemical concentrations with appreciation scores.
Researchers have developed a simple and sustainable method for monitoring and degrading a mixture of polycyclic aromatic hydrocarbons (PAHs) in water. The new approach uses excitation-emission matrix fluorescence spectroscopy and photochemical systems to achieve efficient degradation, outperforming traditional methods like chromatography.
A recent study from the University of Copenhagen found that the oldest Scandinavian bedrock originated in Greenland approximately 3.75 billion years ago. The discovery provides new insights into the formation of continents and the emergence of life on Earth, highlighting the importance of fixed continents for supporting life.
Researchers discovered toxic metal particles in unused cannabis vape liquids, with lead levels 100 times higher than acceptable limits. The contamination was linked to device production, not heating, and highlights the need for regulation and improved testing procedures.
Researchers at the University of Texas at Arlington have developed a method to determine the clinical potency of psilocybin and psilocin in Psilocybe cubensis mushrooms. This technique uses liquid chromatography with tandem mass spectrometry, allowing for accurate extraction and measurement of the strength of the mushrooms.
Researchers review advances and challenges in applying SLA to evaluate unconventional reservoirs, highlighting its simplicity and convenience. The study proposes modifications to address reservoir heterogeneity and suggests combining SLA with machine learning algorithms for improved accuracy.
Researchers from the University of Gothenburg developed a new method to identify the origin of harvested trees using chemical footprints in wood tissue. The study focused on Eastern European countries, but the method is applicable worldwide, tackling over half of tropical timber's illegal harvest.
A team of researchers analyzed sunlight reflected by Titan's atmosphere, identifying over 100 signatures of the methane molecule. The findings also suggest possible evidence of the tricarbon molecule, a discovery that could shed light on the origin of life on Earth.
A team of researchers has successfully identified the odorants responsible for Muscaris grapes' characteristic lychee note, shedding light on its molecular secret. The study's findings provide a scientific basis for breeding innovative grape varieties with distinctive fruity aromas.
Researchers have developed a copper(II)-alkylperoxo complex that can selectively oxidize unactivated alkanes, showcasing exceptional reactivity and paving the way for sustainable technology. By manipulating the solvent environment, the team uncovered the unique properties of their catalyst.
Researchers at UNIST have developed a method to measure nanometer-sized samples within a transmission electron microscope, utilizing nano-thermometers based on cathodoluminescence spectroscopy. The technique offers improved accuracy and spatial resolution compared to conventional methods.
A research team has synthesized a cutting-edge manganese-fluorine catalyst with exceptional oxidizing power, capable of extracting electrons from compounds. The catalyst facilitates efficient electron loss from toxic toluene derivatives, marking a significant breakthrough in catalytic research.
Researchers used mass spectrometry imaging and single-cell metabolomics with deep learning to create 3D molecular maps of the brain, enabling a better understanding of chemical interactions within brain tissue. This breakthrough could help address currently intractable neurological diseases.
Agricultural activities in Lombardy have a significant impact on PM2.5 concentration, comparable to other known sources of pollution. The study used innovative GEOAI models to analyze the relationship between land use and air pollution, providing new insights into agricultural pollutants.
Researchers developed an oxidative stress-based prognostic model for bladder cancer, identifying distinct molecular subtypes and predicting patient outcomes. The model shows promise in tailoring personalized treatment approaches, particularly for patients with low-risk profiles.
Researchers developed an AI-driven lab called Fast-Cat that uses artificial intelligence to provide in-depth analyses of catalytic reactions. The tool conducts high-temperature gas-liquid reactions and analyzes results to determine how different variables affect the outcome of each experiment.
A recent study by Binghamton University researchers found that 90% of commercial tattoo inks in the US market contain major discrepancies between their actual and labeled contents. The study analyzed 54 inks from nine manufacturers and discovered unlisted polyethylene glycol, propylene glycol, and other contaminants.
Researchers from Tokyo Metropolitan University have engineered a micro total analysis system that quantifies target chemicals in a microfluidic chip without pumps or expensive detectors. The device uses gas production to drive ink flow and measure the original chemical concentration.
Scientists at UKCEH developed a robust method to detect and measure toxic chemical 6PPD in river sediments, which has been linked to salmon and trout deaths. The method uses gas chromatography mass-spectrometry techniques to accurately quantify 6PPD concentrations.
Researchers have developed a new method to label naïve neurotransmitter receptor proteins in living animal brains without genetic manipulation. This technique, known as ligand-directed acylimidazole chemistry (LDAI chemistry), uses pulse-chase analysis to track the movement and fate of proteins in real-time.
Researchers developed a portable, droplet-based millifluidic device to monitor patients in the critical first days after surgery. The device measures drainage fluid's alpha-amylase activity in real time, reducing test duration from six hours to two minutes.
Researchers have developed a novel 'nano active control platform' to control excitons and trions, providing valuable insights into the optical properties of two-dimensional semiconductors. The breakthrough discovery enables real-time analysis of nano-light properties with exceptional spatial resolution.
Researchers found six pesticides and related compounds in kale from small farms in Maryland, but levels were much lower than a concern. The study provides insight into the safety of farm-raised greens and will help identify health risks associated with other fruits and vegetables.
Researchers at North Carolina State University are developing a suite of performance metrics to standardize the evaluation of self-driving labs in chemistry and materials science. These metrics aim to compare different lab technologies and identify areas for improvement, ultimately advancing the field and accelerating discovery.
Scientists have found polyene pigments in fossilized snail shells that are 12 million years old, providing the world's first evidence of intact pigments in fossils. The discovery was made possible by analyzing the pigments using Raman spectroscopy and sheds new light on the chemical composition of ancient organisms.
New Jersey Institute of Technology chemists have developed a lab-based method to detect traces of PFAS from food packaging material, water, and soil samples in just three minutes or less. The approach, involving paper spray mass spectrometry, is 10-100 times more sensitive than current standard techniques for PFAS testing.
Researchers at BESSY II used RIXS and DFT simulations to analyze the electronic structures of fumarate, maleate, and succinate dianions. The study found that maleate is potentially less stable than fumarate and succinate due to its delocalized HOMO orbital, which can lead to weaker binding with molecules or ions.
A global ocean of liquid water has been found beneath Mimas' icy shell, with an estimated age of 5-15 million years, suggesting recent ocean formation and potential for life to emerge. This discovery adds Mimas to the list of moons with internal oceans, including Enceladus and Europa.
Researchers successfully improved lithium metal battery charging rates by adding a cesium nitrate compound, while maintaining long cycle life. The new findings challenge conventional beliefs about effective interphase components and contribute to the development of high-energy density batteries.
Researchers developed a novel deep learning method to study crystal structure and molecular interactions of perchlorate salts. The analysis revealed that the explosives' nature is linked to chemical bonding and intermolecular interactions.
Researchers have uncovered evidence of complex microbial communities existing in ecosystems over 3 billion years ago, with a diverse carbon cycle involving various microorganisms. The study provides a rare glimpse into the Earth's early ecosystems and advances our understanding of ancient microbial ecosystems.
A team of researchers found no biological matter in the brown layers, reducing the probability of a biological organism being responsible. The discovery also suggests that ancient paints were unlikely to have been used to preserve the marble surface.
Researchers have created a prototype model that detects 'forever chemicals' in water using a luminescent metal complex attached to a sensor surface. The approach can detect 220 micrograms of PFAS per liter of water, but needs to be more sensitive to detect nanogram levels for drinking water.
High levels of copper linked to poorer patient outcomes in clear cell renal cell carcinoma (ccRCC) patients, according to NIH-funded University of Cincinnati Cancer Center research. The study aims to identify copper's mechanisms and test potential new treatments for ccRCC.