Articles tagged with Ultraviolet Radiation
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A study found that tanning advertisements appeared in 48% of Colorado high schools' newspapers between 2001 and 2005. The ads often promoted discounts for students or labeled as 'prom specials', but only 13% featured UV-free tanning options.
Duke University researchers have developed a technique using ferrofluids and magnetic traps to create 'nanocavities' that can be used as chemical detectors or for data storage. The team uses magnetics to manipulate microstructures, allowing for complex patterns to be assembled.
A small study found that frequent tanners experience withdrawal symptoms when the 'feel-good' chemicals induced by ultraviolet light are blocked. The researchers tested whether exposure to UV light produces endorphins, brain chemicals linked to pain relief and euphoric feelings.
Scientists create light-responsive colloidal particles that can be tailored to exhibit desired effects, including gel-to-fluid transitions and elastic property tuning. These innovations have vast potential applications in various fields such as ceramics, pharmaceuticals, and robotics.
Researchers have made the fastest measurements of molecular vibrations, using a new technique that detects UV photons emitted by molecules under laser pulses. The results show atomic nuclei moving at varying speeds in different isotopes, providing insights into molecular dynamics.
UNSW researchers have created a new type of self-cleaning coating using titanium dioxide nanoparticles. The coating uses visible light to kill Escherchia coli and break down organic compounds, reducing the need for chemical agents. Lab trials show promising results, paving the way for further testing and potential industrial applications.
Astronomers have detected ionizing radiation leaking from a dwarf galaxy undergoing star formation, providing insights into the early universe's evolution. The study suggests that hot stars in Haro 11 allowed for some ionization to escape into intergalactic space.
Researchers found that nonmelanoma skin cancers are strongly associated with UVB radiation, but melanoma patients have a different response. The study suggests that melanoma may be resistant to UVB-induced chromosomal breaks, increasing the risk of more serious cancer.
Research found a high number of chromid breaks associated with increased risk of nonmelanoma skin cancers and basal cell carcinomas, while melanoma risk was not linked. UV-B radiation sensitivity also interacted with other risk factors for squamous cell and basal cell carcinomas.
A new UV measurement tool helps validate UV treatment for preventing disease-causing bacteria and parasites in drinking water. The technique uses fluorescent microspheres to mimic pathogenic microbes, providing precise measures of UV doses.
Researchers discovered that photolyase uses energy from visible light to repair UV damage in plants and animals, with water playing a key role in the process. This enzyme is missing in humans and other mammals, making them more vulnerable to skin cancer.
The South African Large Telescope (SALT) has achieved 'first light' with its full array of mirrors and imaging camera, SALTICAM. This milestone marks the beginning of its scientific observations, which will explore distant galaxies, asteroids, and comets.
Scientists detect early signs of ozone recovery in the atmosphere, attributed to the Montreal Protocol's successful efforts to limit harmful chemicals. However, full recovery is expected to take several decades, highlighting the need for continued sun protection measures.
A recent study suggests that ozone levels in the atmosphere have begun to level off, with some regions even experiencing small increases. However, it is unlikely that the ozone layer will fully recover, and scientists warn that precautions such as UV protection remain vital.
Researchers have developed a permanent solution to fogging on glass, eliminating the need for constant reapplication. The coating remains stable over time and can be applied to various surfaces, making it suitable for use in eyeglasses, camera lenses, and more.
Researchers found that the pigment produced by cells in black-haired people has a thermodynamically unfavorable oxidation potential, while that of red-headed individuals is favorable. This difference may contribute to increased oxidative stress and skin cancer risk in redheads.
A Virginia Tech research group has created molecular assemblies that can absorb therapeutic light and activate complexes attached to DNA, allowing for more precise delivery of cancer-killing drugs. Platinum was added to the structure, ensuring the activation of complexes already attached to the target.
Researchers found that DNA dissipates ultraviolet energy through a wave-like process along its edge, rather than damaging base pairs. This new understanding sheds light on the DNA repair process and has implications for biology.
Study finds that repetitive tanning behavior may be linked to a kind of addiction, similar to alcoholism or drug dependency. Researchers identified UVL tanning dependence in 53% of beachgoers, suggesting why educational interventions have been unsuccessful.
A recent study by Dr. Brian Adams found that 85% of NCAA soccer players and cross-country runners did not use sunscreen during practice, despite being at high risk for sun-related skin cancer. The American Cancer Society estimates that most cases of nonmelanoma skin cancer diagnosed yearly in the US are sun-related.
The Cassini-Huygens mission has captured the first-ever images of Saturn's auroral emissions at its poles, similar to Earth's Northern Lights. The UVIS instrument on the spacecraft shows rapid responses to changes in the solar wind and significant changes in emissions within the 'oval' of the aurora at Saturn's south pole.
Researchers have discovered that monarch butterflies use specialized UV photoreceptors in their eyes to guide their long-distance migration. The butterflies' biological clock also plays a crucial role, with input from both the light-detecting navigation sensors and brain clock combining to provide direction.
Researchers found that increasing water vapor levels caused less damage to mirrors, possibly due to increased ambient hydrocarbon levels. Introducing methanol mitigates water-induced damage, paving the way for accelerated testing and broader illumination capabilities.
The 'Deep Impact' collision released tens of thousands of tons of material, enough to bury a football field under 30 feet of comet dust. Scientists are analyzing X-ray data to better understand the evaporation process on comets and their interaction with solar wind.
Swift detected a quick rise in ultraviolet light after the Deep Impact probe struck a hard surface on the comet, revealing secrets about the impact.
Researchers have developed a new method that uses so-called 'caged compounds' to control protein synthesis, which can be activated by light. This technique could lead to more intricate studies of biological processes, such as protein synthesis in nerve synapses.
Researchers at the University of Colorado Boulder have developed a new polymer that maintains its strength even when exposed to light, offering potential solutions for dental fillings and electronic packaging. The polymer's unique properties could also have applications in boats, automobiles, and structural materials.
Physicists at NIST have demonstrated single photon detectors with an 88% efficiency, a significant improvement over previous designs. The detectors use a tungsten film chilled to near-absolute zero and are expected to enable reliable quantum communications systems.
Researchers at Rensselaer Polytechnic Institute are developing smart lighting sources with improved spectral power distribution, polarization, and color temperature to enable new functions in various fields. These innovations have the potential to reduce energy consumption, dependency on oil, and greenhouse gas emissions.
Researchers have created a high-resolution ultraviolet light source that enables precise energy level measurements of specific atoms, timing of chemical reactions, and nanometer-scale object dimensions.
Researchers found that monarch butterflies rely on ultraviolet light for navigation and that this process is linked to their circadian clock. The study revealed the importance of polarized light in guiding butterfly migration.
The photoelectric effect, first explained by Einstein in 1905, has become a crucial tool for understanding the properties of matter. The new issue of New Journal of Physics features research on hot electrons and high-temperature superconductors, demonstrating its relevance to tailored electronic materials.
Scientists have identified solar wind flowing from funnel-shaped magnetic fields in the Sun's corona, originating in coronal funnels with a speed of about 10 km/s. This discovery improves our understanding of the solar wind's magnetic nature and source region.
Researchers at UC Berkeley develop a silver superlens that breaks the diffraction limit, enabling resolution of up to 60 nanometers in images of nanowires and biological samples. This breakthrough opens doors to advances in nanoengineering, biomedical imaging, and high-density electronic circuitry.
Researchers at the University of New Hampshire have developed a groundbreaking water treatment technology combining ozone and ultraviolet light, providing highest level of public health protection while lowering harmful byproducts. The technology has been implemented in major cities worldwide and is considered cost-effective for many c...
A Danish study found that sunburns occur most frequently among adolescents and young adults, who also exhibit the most risk-taking behavior when outdoors. Women tend to experience more sunburns due to longer exposure times during peak sun hours.
Researchers at MIT have developed a new family of materials that can change shape in response to light, offering potential for minimally invasive surgery and other applications. The polymers use molecular switches that bind together when exposed to UV light, allowing them to maintain their shape until the light is switched off.
A Carnegie Mellon-developed robot has detected life in the Atacama desert through a fluorescence system that can identify sparse microorganisms and visualize biofilms. The findings provide insights into detecting life on Mars, with implications for astrobiology research.
Austrian-German collaboration creates laser-like X-rays with a compact laboratory apparatus, breaking the nanometer barrier. The technology has the potential to improve X-ray imaging in biology and medicine, enabling early-stage cancer diagnosis at reduced risk and higher resolution.
The Swift satellite's Ultraviolet/Optical Telescope (UVOT) has captured an image of the Pinwheel Galaxy, revealing regions of star formation in the galaxy's spiral arms. The UVOT will also help scientists determine the distance to closer gamma-ray bursts and study their afterglows.
Researchers from NASA's Langley Research Center and Goddard Space Flight Center studied tropical convective clouds in Florida to classify ice crystals, which can help predict next winter's snowstorm. They hope to contribute to improving weather and climate models by accounting for clouds' role in atmospheric conditions.
Researchers used FUSE data to detect spectrum of ultraviolet light in region with no star, revealing light scattering from dust near bright star. The team hopes to use high spectral resolution to study diffuse background radiation and understand the nature of interstellar dust.
Researchers have discovered FK Comae Berenices, a rare fast-rotating yellow giant with high levels of coronal magnetic activity. The star's rotation is roughly 200 miles per second, making it an 'extreme case' of sun-like magnetic activity.
Researchers develop gene therapy to treat XP, a devastating disease causing cancerous lesions on exposed skin. The treatment restores DNA repair mechanism, preventing cancerous growth and sunburn-like symptoms in mice.
Researchers at UC Berkeley have created a device that allows brain cells to respond to light, enabling the potential treatment of retinitis pigmentosa and age-related macular degeneration. The breakthrough involves genetically engineering nerve cells to be sensitive to light using ion channels made light-sensitive.
Research finds that melanin in hair follicles can increase cell death in response to UV radiation, depending on its color. The study used mice with engineered pigmentation to demonstrate this effect, suggesting that people with darker skin may not be as vulnerable to skin cancer as those with fair skin.
Researchers at Berkeley Lab have created low-loss and highly flexible optical waveguides using semiconductor nanoribbons, which can be integrated into photonic circuits. The nanoribbon waveguides were synthesized from tin oxide and demonstrated the ability to propagate and modulate light through subwavelength optical cavities.
Scientists have developed a technique to visualize the electric field of visible light, measuring its variation with unprecedented resolution. This breakthrough enables direct and accurate measurement of ultrabroad-band light pulses, opening doors to new applications in molecular electronics and X-ray lasers.
Virginia Tech researchers have developed light-activated therapy agents that are oxygen independent, overcoming a limitation in photodynamic therapy. The new agents are activated by visible light and have been studied in cell cultures, showing promising results.
Researchers found that UV light combined with certain coatings can lower cell adhesion by 15-50% on glass and metal-oxide coated surfaces, reducing bacterial contamination. Higher intensity light is more effective than lower intensity UV light in preventing biofouling.
Researchers demonstrated the safety of combining MT-1 with UV-B light or sunlight to induce tanning in human subjects. The study showed that MT-1 can be safely administered with UV-B exposure, resulting in enhanced tanning without adverse effects.
Researchers at the University of Illinois at Urbana-Champaign have developed a new silicon-based photodetector that is sensitive to ultraviolet light. The device uses nanoparticles dispensed from silicon wafers, which efficiently couple with UV light and produce electrical current.
Researchers found plankton produce compound DMSP when stressed by UV radiation, leading to cloud formation and reduced direct light on the ocean surface. The study suggests plankton may impact global temperatures, with potential benefits in slowing climate change.
Research involving 14 young adults found that those who used tanning beds with artificial UV light experienced greater relaxation and lower tension compared to those without UV exposure. The study suggests that the release of endorphins in response to UV light may contribute to the reinforcing effects of tanning.
Researchers developed wireless nanocrystals that emit visible light by pumping them with a nearby quantum well, improving efficiency over traditional fluorescent bulbs. The process produces white light through varying the size of quantum dots, paving the way for more efficient white-light-emitting diodes.
Astronomers from Johns Hopkins University confirm the Cygnus Loop is closer to Earth than previously thought, with a distance of 1,860 light years. The new findings were obtained using the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite and provide an accurate starting point for understanding this important supernova remnant.
Researchers say broad body of research shows UV-B radiation can cause severe damage to amphibian species from eggs to adults, including retinal damage and blindness. Amphibian declines are linked to multiple causes, but UV-B remains a significant concern.
Three outbreaks of injuries from damaged metal halide lamps in Middle Tennessee were reported, resulting in photokeratitis and UVR burns. The study found that even a single damaged bulb can cause severe symptoms, highlighting the need for awareness and prevention measures.
Researchers found that birds' photoreceptors can detect the Earth's magnetic field by sensing changes in light energy. This process involves specialized visual systems that allow animals to navigate using the magnetic compass. The discovery sheds new light on the mechanisms behind animal magnetism and its potential applications.
Researchers at Stanford Medicine identified Langerhans cells as the principal culprit behind graft-versus-host disease (GVHD) in transplanted mice. Eliminating these cells using ultraviolet light reduced GVHD symptoms, offering a potential prevention method for transplant patients.