Articles tagged with Chemical Analysis
Researchers analyzed ancient coral cores to study climate patterns and found that El Niño was weaker during ice ages, while warm periods saw stronger events. The findings suggest global warming may be responsible for recent intense El Niño events, but more research is needed.
For the first time, scientists have measured nitric acid trihydrate crystals (NAT crystals) in polar stratospheric clouds. These particles contain three molecules of water and one molecule of nitric acid and can exist in the atmosphere up to 7° above the ice point.
The new system can analyze many samples within seconds, nearly 5,000 times faster than other technology in screening samples of catalysts that react with liquids. It will speed up the analysis of combinatorial chemistry samples and reveal molecular mechanisms involved in gas-solid catalysis.
Researchers have found that most of the interstellar dust particles consist of 3-dimensionally cross-linked organic macro-molecules, called polymeric-heterocyclic-aromates. These molecules have been detected in five impact mass spectrometer samples from NASA's STARDUST spacecraft.
University of Cincinnati researchers have developed new techniques to analyze selenium in food supplements, identify arsenic accumulation in seafood and sea plants, and speed up sample preparation using microwave energy. These advancements hold promise for environmental health, bioremediation, and understanding metal toxicity.
Researchers have developed an electrochemical analyzer to detect sulfur-rich compounds at deep-sea vents. The sensor may help identify ancient bacteria and unlock important information about vent life.
Applause dynamics studied using physics principles reveal social self-organization and synchronization processes. Researchers found that individual clapping frequencies play a crucial role in achieving synchronization, leading to increased volume and decreased noise intensity.
Researchers at Purdue University have developed a technique that combines porous silicon with mass spectrometry to streamline biochemical analyses. The technique, called desorption ionization on silicon (DIOS), allows for the simultaneous testing of large numbers of compounds in a fraction of the time required by current methods.
The Mars Pathfinder mission sent back 2.3 gigabits of new data, including over 17,000 images and 16 chemical analyses of rocks and soil. The mission provided key findings on Mars' geology, magnetic properties, atmosphere, and cartography.
A team of researchers will conduct an exhaustive analysis of rock samples, magnetic characteristics, and isotopic compositions from a depth of 15,000 feet in the Mauna Kea volcano. The project aims to learn more about mantle plumes and their role in producing volcanic eruptions.
For the first time, researchers have analyzed polar stratospheric cloud particles using a developed instrument. The results show water-rich particles with high H2O/nitric acid ratios, challenging previous assumptions about PSC composition.
University of Michigan scientists have developed a method to date near-surface fault activity using soft, chalky material called gouge. The research aims to improve earthquake risk assessment and nuclear reactor safety by determining a fault's recent activity and strength.
The University of Michigan team developed a miniature laboratory on a chip that can analyze DNA samples quickly and sensitively. The device is expected to make DNA analysis widely available and has potential applications in medical diagnostics, forensics, and agriculture.
A new environmental monitoring system, E-SMART, uses integrated optic chemical sensors to detect contaminants in soil, groundwater, and air. The system reduces health and safety risks, saves time and cost by operating in situ, and enables real-time assessments of environmental impact.
A new fluorescence technique has been developed for ultra-sensitive enzyme characterization at the single-molecule level. The technique, known as dual-color fluorescence cross-correlation spectroscopy, allows for precise and highly specific detection of molecules in large unspecific fluorescent backgrounds.
The APXS instrument provides new insights into Martian soil and rocks, revealing a more Earth-like composition than previously assumed. The study suggests that Mars has complex geological provinces with varied compositions, indicating a more evolved planet.
The discovery of an ancient Peruvian obsidian quarry provides evidence for long-distance trade in the Americas as far back as 2,500 B.C. The quarry, found by University of Wisconsin-Madison geographer Sarah Osgood Brooks, contains nearly 75% of artifacts identified as coming from a single source.
A recent report from SPRU reveals that British companies are making significant contributions to scientific research, publishing over 41,000 articles between 1981 and 1994. This has led to a reevaluation of the role of industry in advancing science, with findings suggesting that companies are driving innovation across various sectors.
Perkin-Elmer and SmithKline Beecham collaborate on bioinformatics research to speed drug discovery. The partnership aims to develop sophisticated systems for data collection, analysis, and management.
Researchers have found a way to identify ancient ash using chemical transformations, providing new insights into prehistoric lifestyles. The discovery could help explain how early humans used fire for cooking, warmth, and protection.
A US chemist, Cliff Meloan, has developed a comprehensive training manual to help Central American food inspectors detect pesticide residues using advanced analytical methods. The manual, published in 1996, covers procedures for handling raw and processed foods, identifying chemical compounds, and quality control and assurance.
Researchers found that native aquatic plants hyperaccumulate contaminants in their tissue, transforming toxic metal forms into benign ones. Turtle shell fragments serve as sensitive biomonitors of uranium, nickel, selenium, and arsenic contamination, enabling environmental risk assessment and remediation project evaluation.
Geochronologist Richard Ku's analysis of Peking Man fossils reveals they date back to at least 400,000 years ago, significantly older than previous estimates. This finding sheds new light on human evolution and challenges current understanding of the species' origins.