Articles tagged with Chemical Kinetics
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
Comprehensive medical research, clinical studies, and healthcare sciences focused on disease prevention, diagnosis, and treatment. Encompasses clinical medicine, public health, pharmacology, epidemiology, medical specialties, disease mechanisms, therapeutic interventions, healthcare innovation, precision medicine, telemedicine, medical devices, drug development, clinical trials, patient care, mental health, nutrition science, health policy, and the application of medical science to improve human health, wellbeing, and quality of life across diverse populations.
Comprehensive investigation of human society, behavior, relationships, and social structures through systematic research and analysis. Encompasses psychology, sociology, anthropology, economics, political science, linguistics, education, demography, communications, and social research methodologies. Examines human cognition, social interactions, cultural phenomena, economic systems, political institutions, language and communication, educational processes, population dynamics, and the complex social, cultural, economic, and political forces shaping human societies, communities, and civilizations throughout history and across the contemporary world.
Fundamental study of the non-living natural world, matter, energy, and physical phenomena governing the universe. Encompasses physics, chemistry, earth sciences, atmospheric sciences, oceanography, materials science, and the investigation of physical laws, chemical reactions, geological processes, climate systems, and planetary dynamics. Explores everything from subatomic particles and quantum mechanics to planetary systems and cosmic phenomena, including energy transformations, molecular interactions, elemental properties, weather patterns, tectonic activity, and the fundamental forces and principles underlying the physical nature of reality.
Practical application of scientific knowledge and engineering principles to solve real-world problems and develop innovative technologies. Encompasses all engineering disciplines, technology development, computer science, artificial intelligence, environmental sciences, agriculture, materials applications, energy systems, and industrial innovation. Bridges theoretical research with tangible solutions for infrastructure, manufacturing, computing, communications, transportation, construction, sustainable development, and emerging technologies that advance human capabilities, improve quality of life, and address societal challenges through scientific innovation and technological progress.
Study of the practice, culture, infrastructure, and social dimensions of science itself. Addresses how science is conducted, organized, communicated, and integrated into society. Encompasses research funding mechanisms, scientific publishing systems, peer review processes, academic ethics, science policy, research institutions, scientific collaboration networks, science education, career development, research programs, scientific methods, science communication, and the sociology of scientific discovery. Examines the human, institutional, and cultural aspects of scientific enterprise, knowledge production, and the translation of research into societal benefit.
Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
Comprehensive examination of tools, techniques, methodologies, and approaches used across scientific disciplines to conduct research, collect data, and analyze results. Encompasses experimental procedures, analytical methods, measurement techniques, instrumentation, imaging technologies, spectroscopic methods, laboratory protocols, observational studies, statistical analysis, computational methods, data visualization, quality control, and methodological innovations. Addresses the practical techniques and theoretical frameworks enabling scientists to investigate phenomena, test hypotheses, gather evidence, ensure reproducibility, and generate reliable knowledge through systematic, rigorous investigation across all areas of scientific inquiry.
Study of abstract structures, patterns, quantities, relationships, and logical reasoning through pure and applied mathematical disciplines. Encompasses algebra, calculus, geometry, topology, number theory, analysis, discrete mathematics, mathematical logic, set theory, probability, statistics, and computational mathematics. Investigates mathematical structures, theorems, proofs, algorithms, functions, equations, and the rigorous logical frameworks underlying quantitative reasoning. Provides the foundational language and tools for all scientific fields, enabling precise description of natural phenomena, modeling of complex systems, and the development of technologies across physics, engineering, computer science, economics, and all quantitative sciences.
Engineers at the University of Pittsburgh have created a soft material with a nerve net that mimics how simple living systems coordinate motion. The material responds to chemical reactions, producing mechanical movement without electronics or motors.
A team of scientists observed the earliest steps of ultrafast charge transfer in a complex dye molecule, with high-frequency vibrations playing a central role. The experiments showed that these vibrations initiate charge transport, while processes in the surrounding solvent begin only at a later stage.
A novel artificial solid electrolyte interface based on non-coordinating charge transfer significantly improves the stability of aqueous zinc metal batteries. This design enhances cycle life, reduces side reactions, and promotes uniform zinc deposition, leading to improved battery performance.
A new theory predicts that a layer of mostly product at the interface determines the reaction rate in mechanochemical reactions. The force applied by the balls accelerates the reaction by reducing the thickness of the product-rich layer and inducing faster collisions between reactants.
Chemists at Brookhaven Lab develop new theoretical framework to accurately predict catalyst behavior, revealing how conditions like temperature and pressure can change a catalyst's structure, efficiency, and products. The study highlights the significant impact of reaction environment on catalytic performance.
Researchers developed two innovative methods for intracellular polymerization using light stimuli, offering precise spatial and temporal control. These methods have the potential to modulate various cellular functions, making them a promising avenue for therapeutic interventions.
Researchers developed imaging technique with 800nm spatial resolution to measure three-dimensional temperature distribution inside industrial zeolite-catalyst particles. The technique revealed utilization of active sites and evolutions of reaction intermediates during MTO reactions.
Researchers developed innovative Au@Cu7S4 yolk@shell nanocrystals capable of producing hydrogen when exposed to both visible and NIR light, achieving a peak quantum yield of 9.4% in the visible range and 7.3% in the NIR range for hydrogen production.
Scientists from Osaka University and collaborators identify environmentally friendly reaction conditions for producing peracids, overcoming wasteful and dangerous chemical synthesis methods. The optimized process uses sunlight and oxygen, allowing for safe and cost-effective production of essential chemicals.
A research team at Osaka University has found a way to synthesize alkylamines in a sustainable and cost-effective manner, using a novel catalyst system that produces only water as a byproduct.
A novel strategy utilizing phosphorus nanolayers mitigates electrode-level heterogeneity in fast-charging lithium-ion batteries. The graphite-phosphorus composite exhibits consistent cycle retention, high Coulombic efficiency, and improved lithiation uniformity.
Dual-atom catalysts (DACs) face challenges in converting carbon dioxide into multicarbon products due to C-C coupling difficulties. Researchers at Tohoku University uncovered the causes of this failure through advanced theoretical calculations.
Researchers from GIST have developed a hydrotropic-supporting electrolyte to enhance the solubility of organic redox molecules in aqueous systems. This improvement enables the creation of high-energy-density electrochemical capacitors with potential applications in redox flow batteries.
Texas A&M researchers have found a significant increase in energy storage capacity of water-based battery electrodes, paving the way for safer and more stable batteries. The discovery could provide an alternative to lithium-ion batteries, which are facing material shortages and price increases.
Scientists have created a novel approach to produce phase-pure quasi-2D Ruddlesden–Popper perovskites, enabling highly efficient and spectrally stable deep-blue-emissive perovskite LEDs. The rapid crystallization method yields high-performance devices with an emission wavelength centered at 437 nm.
The researchers investigated the ignition of methane-air mixtures using a detailed reaction kinetics model. They identified five domains with different sets of chemical reactions leading to methane ignition. This knowledge can help increase efficiency and reduce environmental impact in heating and power generation.
A Japanese research team has synthesized isotopic atropisomers, a rare class of compounds, using ortho-CH3/CD3 discrimination. The resulting isotopic atropisomers exhibit high rotational stability and stereochemical purity.
Researchers studied ketene conversion over H-SAPO-11 using kinetic analysis and spectroscopy. They found two pathways: acetyl species following acetic acid ketonization or acetoacetyl species via keto-enol tautomerism with water.
Researchers have discovered an innovative way to enhance the energy efficiency of metal-carbon dioxide batteries by introducing unconventional phase nanomaterials as catalysts. The novel design boosts battery energy efficiency up to 83.8%, contributing to carbon-neutral goals.
Researchers introduced a new method to analyze dynamic processes in photoelectrocatalytic reactions using carbon dots. The technique, TPV technology, provides detailed information on charge transfer and reaction kinetics, enabling the discovery of new catalytic properties.
Scientists at The University of Tokyo's Institute of Industrial Science have developed a novel theory for describing nonlinear dissipative phenomena in a dual geometric space. This work enables the extension of thermodynamics to complex chemical reaction networks, including those involved in living organisms' metabolism and growth.
A new DNA-based fluorescence technique using single-molecule electron-transfer kinetics can identify point mutations in mRNA, facilitating the diagnosis of gliomas and potentially treating the disease. This breakthrough may lead to real-time cancer diagnostics during surgical biopsies, reducing the need for multiple surgeries.
King Abdullah University of Science & Technology (KAUST) researchers have created a new membrane material that separates nitrogen from methane based on their shape difference. This approach reduces purification costs for natural gas by up to 73% compared to existing methods, offering an energy-efficient solution.
A new method predicts the starting materials and reaction paths of multi-step chemical reactions using only information about the target product molecule. The algorithm reduces the number of paths to explore, mitigating the combinatorial explosion that occurs in single-step reactions.
Researchers at MIT have developed a new, inexpensive catalyst material that can produce oxygen from water, potentially replacing rare metals and reducing the cost of producing carbon-neutral fuels. The material, made of abundant components, allows for precise tuning and matches or exceeds the performance of conventional catalysts.
Scientists have gained a new understanding of the atomic level interactions in complex catalysis, enabling more efficient and sustainable chemical production. Researchers used x-ray spectroscopy, machine learning analysis, and first principles calculations to model reactions and identify active site structures.
Researchers developed a kinetic hypothesis governing the evolution of the Last Universal Common Ancestor (LUCA) based on simulation experiments. They discovered a kinetic factor that governs the flow of chemical reactions in the TCA cycle, validating their hypothesis for deep-branching bacteria and archaea.
Researchers developed a nickel-cobalt metal dimer on nitrogen-doped carbon that can catalyze electrolysis under both acidic and basic conditions. The new system exhibits comparable overvoltage to commercial Pt-based catalysts and shows significant activity enhancements compared to individual single-atom catalysts.
Researchers at the University of Texas at Austin have discovered a new method to improve oxygen reduction in fuel cells using iron-based single-atom catalysts. This breakthrough could unlock a level of efficiency never before realized, enabling large-scale deployment of fuel cells and their nearly limitless potential applications.
A research team at USTC reports a new class of axial superlattice nanowires (ASLNWs) that enable large lattice-mismatch tolerance and vast material combinations. They achieve this by designing an axial encoding methodology for predictable, high-precision synthesis.
Japanese researchers create simulation method for theoretical estimation of catalytic reaction efficiency, enabling forecasting of reactant conversion and product selectivity. The method can be applied to various catalyst systems, contributing to a carbon-free society.
Researchers at the University of Houston have developed a new 3D zinc-manganese nano-alloy anode that allows for fast charging and is stable without degrading. The anode uses seawater as an electrolyte, lowering battery cost, and has been tested to last up to 1,000 hours under high current density.
Researchers at Johannes Gutenberg University Mainz developed a new zero-to-ultralow-field NMR spectroscopy method to analyze chemical reactions in metal containers. This technique overcomes the limitations of high-field NMR, allowing for the observation of complex reactions and catalysis mechanisms.
Chemists at the University of Tokyo mapped an artificial molecular self-assembly pathway that forms a spherical cage and an ultrathin sheet, exhibiting primitive qualities of a 'smart' material. The research team hopes to design molecules that can self-assemble and reorganize independently under environmental conditions.
Researchers developed a sandwich-structured electrode using ZIF-67 to trap polysulfides, improving reaction kinetics and preventing the shuttling effect. This enhances lithium sulfur battery performance by up to three times that of traditional lithium ion batteries.
Researchers developed a new method to create OER catalysts with rich defects, enhancing their intrinsic activity and promoting mass transfer. This breakthrough provides a new direction for large-scale preparation and application of efficient OER catalysts.
Researchers at Sandia National Laboratories have discovered a new avenue for understanding and controlling combustion processes, which will ultimately lead to cleaner engines. By analyzing a massive dataset of flames and fuels, the team identified correlations among chemical intermediates that play a role in pollutant formation.
Researchers from TROPOS and universities of Innsbruck and Helsinki observe rapid pair production in laboratory experiments, indicating significant formation of non-volatile accretion products. This discovery is crucial for understanding the climate impact of secondary organic aerosol.
Researchers design a perovskite nanoparticle that changes color when interacting with ions and small molecules during chemical reactions. This allows for qualitative monitoring of reactions with the naked eye and quantitative analysis with simple instrumentation.
Using quantum chemistry and X-ray spectroscopy, researchers have gained insights into the bonding behavior of iron pentacarbonyl. The study could lead to the development of novel catalysts for chemical storage of solar energy by understanding how photons interact with molecules on ultrafast timescales.
Researchers from Sandia, Manchester, and Bristol have made direct measurements of a gas-phase Criegee intermediate using photoionization mass spectrometry. The study provides new insight into the reactivity of these transient molecules, which are implicated in autoignition chemistry and atmospheric reactants.
Researchers at Lawrence Berkeley National Laboratory have developed a copper-free version of click chemistry to label glycans in live mice, providing new insights into glycobiology and molecular imaging. The technique overcomes the toxicity issue of conventional copper-catalyzed reactions.
Researchers use novel optical approach to study hybridization kinetics in living cells, finding that DNA-strands with 16 units react seven times faster than those outside, while 12-unit strands react five times slower. This discovery provides valuable insight into the complexity of biological cells.