Articles tagged with Free Radicals
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.
Researchers at Lund University have discovered a cell's protective mechanism against excessive hydrogen peroxide, a key free radical. The study shows that the channel in the cell membrane closes automatically when high concentrations of hydrogen peroxide are detected, preventing damage and cell death.
Recent studies highlight the vital role of fruits, vegetables, and co-products in preventing chronic diseases. A diet rich in these foods can lower blood pressure, reduce heart disease risk, and improve overall health.
Researchers have identified two highly soluble molecules with superior antioxidant benefits for cells, which could help prevent and manage certain degenerative diseases by maintaining lower levels of harmful free radicals. The study suggests that these molecules can transfer and accumulate in membranes, reducing the risk of cell damage.
Researchers found that colder temperature exposure increases oxidative stress in the nasal cavity, leading to worsened asthma symptoms in children. The study used nasal fluid samples and measured malondialdehyde (MDA) levels as a biomarker of oxidative stress.
Researchers found that daily cranberry extract consumption for 28 days improved running speeds by 1.5% and reduced post-exercise blood lactate levels. The study also showed increased muscle oxygenation rates and slower deoxygenation.
Scientists developed a synthetic melanin that accelerates wound healing and protects against sun damage. The cream also quiets the immune system, allowing for continuous repair and reducing inflammation.
A team at Osaka University used neutron crystallography to image the atom-by-atom structure of a copper amine oxidase enzyme, revealing unprecedented structural insights. The study provided details on the protonation/deprotonation state and motions of key cofactors, facilitating single-electron transfer.
Researchers at UC Santa Barbara have developed a synergistic method that allows for the synthesis of non-canonical amino acids, which are important for therapeutic purposes. The process shortens existing multi-step methods by 3-5 steps and provides stereoselective chemistry.
Researchers have developed a set of biocatalysts that enable precise control over free radical reactions, solving a decades-old challenge in asymmetric catalysis. The metalloenzymes can selectively convert chiral compounds into desired products, opening up new possibilities for the synthesis of bioactive molecules and everyday polymers.
Researchers at Buck Institute for Research on Aging developed a bioavailable compound that selectively inhibits free radical production in mitochondria, preventing and treating metabolic syndrome in mice. The compound, S1QEL1.719, decreases fat accumulation, improves glucose tolerance, and normalizes fasting insulin levels.
Researchers have developed a new approach to treating tumors using 'self-immolative' polyferrocenes that trigger a fatal cycle of oxidative stress in cancer cells. In experiments, these copolymers inhibited tumor growth with negligible side effects, offering potential for chemodynamic therapy.
YgaV plays a crucial role in regulating the expression of anaerobic respiratory genes and managing ROS levels in response to external H2S. This helps bacteria fine-tune their metabolism and increase antibiotic tolerance.
Researchers use pulse radiolysis experiments to measure how unpaired electrons can drive chemical reactivity on a molecule's opposite side, enabling the creation of novel synthetic methodologies. The study demonstrates the potential for free radicals to influence reactivity beyond their site of origin.
Researchers used AI to predict compounds that could neutralize reactive oxygen species causing baldness. They successfully regenerated hair on mice using microneedle patches, providing a promising new treatment for androgenic alopecia.
A recent study by University of the West of Scotland found that citrus honey has significantly higher antioxidant activity than other types of floral honey. The research discovered compounds such as hesperetin, linalool, and caffeic acid in citrus honey, which are linked to its enhanced antioxidant properties.
A team from The Institute of Industrial Science at The University of Tokyo has developed a new platform that uses organorhodium(III) phthalocyanine complexes to achieve the combination of traits necessary for photodynamic therapy. The new system shows toxicity to HeLa cells, indicating its potential as a cancer treatment.
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.
Researchers found that astrocytes can transfer their mitochondria to damaged neurons after a brain hemorrhage, stimulating the production of an enzyme that neutralizes free radicals. This treatment showed improved neurological recovery in mice, but not if the mitochondria were without the protective enzyme Mn-SOD.
A new study at the University of Bath found that a key ingredient is missing from all sunscreens, leaving skin vulnerable to damage. The researchers identified iron-trapping extracts that can improve protection against UV rays and oxidative stress, reducing the risk of aging and cancer.
Engineers at University of Illinois Chicago develop additive material to make inexpensive iron-nitrogen-carbon fuel cell catalysts more durable. The material scavenge and deactivate free radicals, reducing corrosion and degradation in fuel cells.
Prunes have been found to help prevent or delay bone loss in postmenopausal women by reducing inflammation and oxidative stress. This is due to their potential to alter the gut microbiome, which can lead to lower levels of pro-inflammatory cytokines and markers of oxidative damage.
Researchers at Washington State University discovered that combining gallic acid with stretching decreases inflammation markers and improves protein production in arthritic cartilage cells. This finding suggests a potential new procedure for treating osteoarthritis by growing healthy cartilage tissue.
Scientists have created a photostabilizer that scavenges singlet oxygen atoms and free radicals, improving electrochemical performance in high-voltage lithium batteries. The bio-inspired mechanism addresses the issue of electrolyte degradation, which poses challenges to next-generation energy storage devices.
Researchers at Ohio State University found that cancer can cause cardiac dysfunction due to the presence of free radicals, which were reversed by specific antioxidants in fruit flies and mice with tumors. The study suggests a potential new approach to treating heart problems in cancer patients.
Researchers review advancements in biosensing technologies for neonatal sepsis diagnosis, highlighting the need for faster and more accurate methods. Biosensors offer a promising solution, detecting multiple parameters simultaneously with high sensitivity and accuracy.
A study from West Virginia University suggests that pollutant exposure can lead to increased free-radical damage, which speeds up aging. This occurs when pollutants break down into highly reactive molecules that damage biomolecules, leading to premature aging.
Researchers create a microfluidic probe that generates free radicals with controlled size and concentration, allowing them to manipulate small areas on cellular surfaces. This approach enables the study of cell reactions to radicals in a controlled way, opening up new possibilities for subcellular research.
Researchers from the University of Vienna detected high concentrations of environmentally persistent free radicals (EPFR) in charcoal samples from fires worldwide. These toxic chemicals can persist for years and may harm ecosystems and human health, posing a significant threat after landscape fires.
Researchers at Ames Laboratory have developed a new method to break down polystyrene waste in a single step, at room temperature, and without harmful solvents. The process involves ball-milling, which generates free radicals that enable the extraction of monomeric styrene from the oligomeric radical-bearing species formed.
Researchers discover that reactive oxygen molecules control cellular processes important for brain adaptation in mice. Free radicals are necessary for healthy aging and neuroplasticity, contradicting previous harmful views.
Researchers from Tokyo Institute of Technology developed a method to measure polymer breakdown using a fluorescent molecule, enabling the estimation of resistance to mechanical stress. This breakthrough allows for the evaluation of polymer performance and specificity, paving the way for improved material design.
Researchers found that supplementing people with HIV with GlyNAC, a combination of glycine and N-acetylcysteine, improves multiple deficits associated with premature aging. The supplement boosts glutathione levels, a natural antioxidant that neutralizes free radicals and helps maintain cellular function.
Researchers discovered that gold nanorods can catalyze the degradation of organic micropollutants like bisphenol A and perfluorooctanoic acid. When exposed to sunlight, these nanorods produce free radicals that break down pollutants, making them a promising low-cost water purification method.
Researchers at UNSW Sydney have developed a new imaging technique that uses the color of cells as a 'thermometer' for molecular imbalance. This technology has the potential to revolutionize medical diagnostics by allowing scientists to detect and decode cell colors without needing to extract samples from the body.
Researchers at Stanford University School of Medicine found a common mutation in the ALDH2 enzyme may contribute to Alzheimer's disease, increasing cell damage from alcohol metabolism. The mutation, prevalent in East Asian populations, causes reduced enzyme activity and buildup of toxic acetaldehyde.
Scientists found that Nqo1 is necessary for liver cancer cells' ability to thrive by activating key pathways. Blocking Nqo1 dramatically suppresses liver cancer cell proliferation.
Researchers discovered a new mechanism by which microorganisms protect themselves against highly reactive molecules known as free radicals. By accumulating lysine and altering their metabolism, yeast cells can produce antioxidant glutathione, increasing their resistance to cell damage.
Researchers used electron accelerators to generate free radicals in water molecules, allowing them to study the damaging effects on biomolecules. This method provides a valuable tool for understanding naturally occurring antioxidants and proteins like vitamin C, with implications for developing new medications to prevent cell damage.
Researchers have developed a new technique to simultaneously measure blood clotting and the formation of free radicals, shedding light on their role in blood vessel damage and disease development. The discovery could lead to better treatments for conditions like heart disease, stroke, and vascular dementia.
Researchers at UBC Okanagan have discovered that TEMPO, a well-known artificial anti-oxidant, is significantly more effective than nature's best option, vitamin E. The study found that TEMPO can convert free radicals to harmless molecules up to 100 times faster than vitamin E in certain environments.
Researchers at Michigan Technological University studied acetone degradation during advanced oxidation water treatment to understand the formation of chemical byproducts. They found over 200 reactions involved in acetone degradations, highlighting the need for models to predict byproduct production from other chemicals.
Researchers analyzed e-cigarette flavors and found that many chemicals used in flavoring increase the production of free radicals, while a few decrease it. The study identified six flavorants that significantly increased free radical production, including linalool, dipentene, and citral.
Researchers developed a therapeutic complex based on multi-layer polymer nano-structures of superoxide dismutase (SOD) to effectively rehabilitate patients after acute spinal injuries, strokes, and heart attacks. The substance can neutralize free radicals and reduce swelling, promoting faster recovery.
Researchers are using a unique imaging technique, Quest MRI, to study the earliest signs of Alzheimer's disease in mice. The technique measures oxidative stress in specific brain regions over time and has shown promise as a potential biomarker for AD.
Researchers found that mushrooms are the highest dietary source of ergothioneine and glutathione, two antioxidants that may protect against oxidative stress and age-related diseases. The amounts of these compounds vary greatly between mushroom species, with porcini being the richest source.
Researchers found that lichen samples from Moscow and Nizhny Novgorod had higher free radical concentrations than those from cleaner towns. The study suggests using electron paramagnetic resonance spectroscopy to monitor air quality in cities without traditional stations.
Phenolic compounds exhibit antioxidant activity through two distinct mechanisms: breaking free radical chains and chelating abilities. The ANN model identified chemical features contributing to high DPPH* scavenging activity, including alcohol groups, molecular size, and flexibility.
A promising artificial blood substitute has been developed using modified hemoglobin, effectively carrying oxygen and scavenging free radicals. The novel approach packaging hemoglobin in a benign envelope overcomes toxicity issues with traditional chemically modified hemoglobin.
A new study measures potentially damaging free radicals in cigarette smoke for the first time, finding variations in their levels across different cigarettes. The researchers' standardized protocol could help assess people's exposure to free radicals and inform potential health risks.
Researchers developed a standardized protocol for measuring gas-phase and particulate-phase free radicals in cigarette smoke. The study found that levels of these radicals varied widely across cigarette types, with highly ventilated cigarettes producing lower levels.
Researchers have discovered molecules that prevent free radical production by cells, which are implicated in human diseases and the aging process. The findings offer a precise tool to test the free radical theory of aging and could lead to new therapeutic leads for drugs.
Researchers used computer simulations to study the formation of superoxides, a type of free radical that can damage cells and contribute to aging. The study found that an oxygen molecule can penetrate specific locations in proteins, leading to the formation of superoxides.
Researchers at the University of Michigan have discovered a protein that acts as a powerful protectant against free radicals, which cause cell damage and death. The protein is activated by excessive free radicals and helps to regulate autophagy, a process that reduces oxidative stress and slows down aging.
Researchers have identified unique genetic markers that indicate higher stress tolerance in corals, enabling the development of novel reef restoration strategies. These markers can be used to create fine-scale distribution maps and guide selective breeding programs for more resilient corals.
A study found high-intensity 'sprint' training causes muscle tissue stress, weakened antioxidant defenses, and reduced mitochondrial function in untrained individuals.
A study published in The Journal of Experimental Medicine found that hyper-aggressive immune cells that consume glucose may drive the development of coronary artery disease. Blocking this glucose overconsumption prevented inflammation and atherosclerosis, suggesting new therapeutic interventions to prevent heart attacks.
Researchers at Ghent University found a worm globin protein that generates free radical signals, which are essential for reproductive cell generation and regulation of hydrogen peroxide concentrations. Genetic knockdown of the new globin results in sterility, suggesting a crucial role for this signaling process in biology.
New research reveals that smog exposure can cause the formation of free radicals in lung proteins, leading to damage, inflammation, and breathing difficulties. The study, conducted in a controlled environment, suggests that ozone reacts with amino acids in lungs, triggering the creation of highly reactive species.
Researchers at University of Helsinki found that black ants can change their food taste in response to fungal pathogens. By consuming a diet with high levels of free radicals, the ants show improved resistance to infections.
Researchers at the Buck Institute found that increased free radicals in mice accelerated wound healing in young animals but led to thin skin and poor wound healing as they aged. This study sheds light on current discrepancies regarding the role of free radicals in the aging process.