Articles tagged with Ultraviolet Radiation
Scientists have developed a new strategy for constructing photonic heterostructure crystals with tunable properties, which can absorb and transmit photons. These crystals, in the form of striped rods, exhibit unique fluorescence behavior and serve as a prototype for a logic gate.
The SISTINE mission aims to identify signs of life on exoplanets by analyzing the radiation from their host stars. Astronomers have found that false-positive biomarkers can be created through non-biological processes, making it essential to study the star's spectrum to distinguish between true and false positives.
Researchers at Kanazawa University have identified catalysts that facilitate the photolysis of cyclopropenones under visible-light conditions. This novel method yields highly reactive alkynes without UV light dependence, making it a valuable alternative for industrial applications.
A new study found that rising temperatures due to climate change will increase the number of days with high concentrations of ozone in the Mid-Atlantic region, posing significant health risks. The study, led by Cristina Archer, analyzed nearly 50 years' worth of data and found that near-ground ozone levels can exacerbate respiratory co...
Researchers use ultra-fast lasers to study chemical bond dissociation, shedding light on molecular behavior. The technique allows for detailed understanding of photochemical reactions and potential manipulation of chemical bonds.
A new nanotheranostic system uses silica-coated bismuth-ferrite harmonic nanoparticles to combine diagnostic imaging with targeted drug delivery, overcoming limitations of previous approaches. The system allows for medically safe release of therapeutics upon near-infrared light activation.
Astronomers have discovered a large amount of warm gas ejected in the Great Eruption of Eta Carinae, revealing an astonishingly different ultraviolet-light image. The newly revealed gas is important for understanding how the eruption began and could be used to study other stars and gaseous nebulas.
Scientists confirm electrically-charged molecules shaped like soccer balls in space, shedding light on the mysterious contents of interstellar medium. The discovery points toward a strong likelihood for other complex carbon-bearing molecules arising spontaneously in space.
A new report reveals that ozone-driven climate change is having far-reaching impacts on the Earth's ecosystems, from weather patterns to sea mammal populations. The study found that warmer oceans are benefiting some species, while others are declining due to changes in ocean productivity and acidification.
Researchers at Martin-Luther-University Halle-Wittenberg have found a way to further increase the vitamin D content of eggs by exposing chickens to UV light. This method works under practical conditions and could represent an important step towards supplying the population with vitamin D.
The study reveals that the green photoluminescence in CsPB2Br5 is caused by a small overgrowth of nanocrystals composed of CsPbBr3 along its edges. This understanding paves the way for designing and fabricating novel optoelectronic devices.
Scientists at Nagoya Institute of Technology create new test method using UV light to evaluate interface properties of metal and semiconductors. They found that photo-excited electrons can get trapped at the interface, causing behavioral shifts in device performance.
Researchers have developed a new class of molecular photoswitches that meet key requirements for molecular photocontrol. The switches can be controlled using visible light and have improved properties compared to previous designs.
A team of researchers has developed a new experimental and theoretical framework to interpret spectroscopic signals from magnetic materials when probed with extreme ultraviolet radiation. This allows for the disentanglement of signals from different elements in the material, enabling the study of complex dynamic processes.
The Hubble Space Telescope has captured an image of the galaxy Messier 90, which is moving towards the Milky Way at a speed of approximately 60 million light-years. This rare phenomenon is known as blueshift, where the galaxy's light is compressed and shifted towards the blue end of the spectrum.
A study found that nearly all Pinterest pins for homemade sunscreens positively portrayed their effectiveness but offered insufficient UV radiation protection. The researchers emphasized the importance of using commercially sold and regulated sunscreen products to protect against skin cancer.
A team of scientists found that opsin 3, a protein related to rhodopsin, regulates melanin production in human skin cells. Without opsin 3, the skin produces more pigment, resulting in darker skin color. The study reveals a new paradigm for opsins and may lead to treatments for pigmentation disorders.
Scientists have caught a new class of molecular switches in action, revealing the full sequence of structural transformations. The discovery sheds light on how thermal steps work and provides new control mechanisms to improve switch performance.
Researchers developed a first-of-its-kind elastic polymer blend that displays white fluorescence when deformed and then goes dark after relaxing. The material's color can be tailored by using different fluorescent rings, enabling the creation of a white-light-emitting polymer.
Researchers at NTNU have created a new electronic component that emits ultraviolet light, replacing traditional fluorescent lamps with a non-toxic and cheaper alternative. The technology has the potential to increase market demand for UVC products by 40% annually.
Researchers at the Field Museum used UV light to reveal differences in millipede genitals, enabling them to identify eight separate species, four fewer than previously recognized. The discovery has implications for environmental monitoring and understanding climate change.
Scientists develop DNA nanodevice that uses near-infrared light to guide stem cells to wounds, promoting muscle tissue regrowth in mice. The system successfully activated receptors, causing cells to move and grow, with treated mice showing increased signs of regeneration.
A team of researchers has discovered a stellar flare ten times more powerful than anything seen on our sun, erupting from an ultracool star almost the same size as Jupiter. The star, ULAS J224940.13-011236.9, is only a tenth of the radius of our own sun and is considered a brown dwarf by some definitions.
New study models UV environments of nearby exoplanets, finding they could support life despite high radiation levels. The researchers argue that life has survived similar conditions on Earth and suggests the possibility of life existing today on planets like Proxima-b.
Researchers at MIT's Media Lab have created basil plants with enhanced flavor and potential health benefits using computer algorithms. The team used hydroponic containers with controlled environmental conditions to grow the plants, which were then analyzed for volatile compounds. Machine learning algorithms evaluated millions of possib...
A study published in PLOS ONE found that SPF moisturizer users incompletely cover their eyelid regions during application. The researchers compared sunscreen and moisturizer application and found significantly better coverage with sunscreen. This highlights the importance of using sunscreen for optimal sun protection.
Researchers have created plants that can produce metal-organic frameworks (MOFs), a type of nanomaterial, which can be used to detect chemicals and protect against harmful UV rays. The augmented plants could potentially perform useful new functions and may lead to applications in agriculture and space exploration.
A study found that urban bats' responses to artificial light vary across species, seasons, and lamp types. Tree cover mitigates the negative effects of light pollution on bat activity, allowing some species to thrive in areas with high tree density. However, most species are repelled by street lamps, regardless of UV emission.
A team of scientists at Waseda University has discovered a new type of structural phase transition in an organic crystal that can be triggered by light. This finding may broaden the applicability of photo-responsive solids and enable the development of next-generation actuators that can be controlled remotely using light.
Scientists at the University of Wisconsin-Madison developed a novel 3D printer that uses patterns of visible and ultraviolet light to dictate which monomers are polymerized, yielding multi-material parts. Researchers can now control the material properties by designing digital images that guide the light direction.
Researchers have designed a novel polymer that can switch its thermal conductivity in response to light, enabling on-demand heat routing. The material's unique behavior has potential applications in managing heat for sensitive electronics and keeping electrical devices warm.
A new study finds that K stars, which are dimmer than the Sun but brighter than faintest stars, may be particularly promising targets for searching for signs of life. K stars live a long time and have less extreme activity in their youth, giving them plenty of time for life to evolve.
Researchers at Tokyo Institute of Technology have developed a frequency-tunable plasmonic-based THz device for non-invasive biological imaging. The new device shows improved ability to distinguish between different tissues, opening up possibilities for enhanced diagnostic imaging tools.
The new quantum sensor developed by researchers at the University of Waterloo promises significant advancements in long-range 3D imaging and monitoring the success of cancer treatments. The sensors can detect single particles of light with high timing resolution, speed, and efficiency over an unparalleled wavelength range.
Researchers have created a technique to quickly measure protein vibrations, enabling faster analysis of proteins' microscopic movements. This breakthrough could lead to more efficient biological research and the development of new biotechnologies.
Researchers discovered that freshwater bacteria grow faster in daylight and use blue light absorption mechanisms to regulate growth. The study suggests that these bacteria have special genes that allow them to sense light and adjust their metabolism accordingly.
Researchers have developed a molecule that could enhance sun cream's protective effect against UVA rays, potentially benefiting patients with Friedreich's Ataxia and other mitochondrial disorders. The study found that skin cells from FA patients are up to 10 times more sensitive to UVA damage.
Researchers at Penn State developed firefly-mimicking structures to improve light extraction efficiency in LEDs, achieving up to 90 percent. Asymmetric microstructures increase surface area for interaction with light and promote randomization of reflections, allowing more light to escape.
AntBot, a new robot developed by CNRS and Aix-Marseille University, replicates the navigation capabilities of desert ants using polarized light and optical sensors. The robot can explore its environment and return to its base with precision, covering distances of up to 14 meters.
A team of Florida State University physicists has discovered a way to stabilize the color of light emitted from halide perovskites, a promising class of materials for optoelectronic technologies. The research, published in Nature Communications, uses a unique nanostructure to turn unstable materials into stable ones.
Poppies' colorful petals contain high concentrations of pigment, which causes efficient scattering of light. The unique shape of the pigmented cells creates air-filled gaps that reflect light on the cell/air boundary, resulting in striking colors.
A team of researchers discovered that North American flying squirrels fluoresce pink under ultraviolet light, with the purpose still unknown. The discovery was made possible by a graduate student who helped develop a protocol to further investigate the phenomenon.
Researchers discovered that corals emit green fluorescence, attracting symbiotic dinoflagellates and potentially aiding coral recovery after bleaching. This biological signal enhances the chances of meeting new symbionts, suggesting a possible mechanism for corals to recover from heat stress-induced losses.
Researchers develop a simple and inexpensive method using ultraviolet light to gather and organize particles in liquids, enabling precise control of fluid flow and potential applications in sensing, drug delivery, and nanotechnology. The method shows promise for sorting particles by size and moving uphill toward the light source.
A study by Northwell Health found that ultraviolet disinfection technology can eliminate up to 97.7% of pathogens in operating rooms. The technology, using a focused multivector ultraviolet (FMUV) device, reduces human and product error in pathogen proliferation.
Researchers from UTokyo and RIKEN developed a device that performs logic operations using electric fields and UV light. The device has the potential to create less heat and power consumption than current semiconductor chips.
A Tel Aviv University-led study finds that some supermassive black holes are triggered to grow by suddenly devouring a large amount of gas in their surroundings. This discovery provides new insights into the mysterious growth of these 'giant monsters'.
Scientists have created a system to probe biomolecules' chiral properties in real-time, providing insights into their biological function. The setup allows for the detection of enantiomers at picosecond resolution, overcoming previous limitations.
Researchers at Los Alamos National Laboratory developed a new method to intentionally 'squash' colloidal quantum dots, creating dots capable of stable, blink-free light emission. This approach suppresses spectral fluctuations in single-dot emission and results in spectrally narrow light with highly stable intensity.
Researchers found that a promising eco-friendly flame retardant, polymeric flame retardant (polyFR), can break down into potentially hazardous substances when exposed to heat or ultraviolet light. The degradation process yields small, brominated compounds with the potential to cause toxic effects on organisms.
Scientists from the University of Bath and Northwestern University have developed a new ultra-sensitive sensor using a gold nanoparticle array, detecting tiny amounts of material with great potential. The sensing mechanism is affected by molecules binding to the surface of nanoparticles, providing a means for detecting small molecules ...
A massive stellar flare on a baby star has been spotted by University of Warwick astronomers, revealing how it could create the building blocks for future planets. The flare's x-rays are thought to affect the formation of chondrules, flash-melted calcium-aluminium-rich grains that eventually coalesce into orbiting planets.
Rosana Molina, a Montana State University doctoral candidate, received a three-year F31 fellowship grant to develop more efficient two-photon excitation methods for neuroscience research. This technology enables deeper brain imaging and has the potential to revolutionize our understanding of the brain.
Researchers discovered a mechanism for how ice particles and certain molecules release harmful substances into the atmosphere. The study found that organic molecules attach to ice particle defects, leading to UV radiation-induced radicals that damage the ozone layer.
Researchers have developed wireless, battery-free sensors that monitor skin exposure to solar radiation in real-time, providing a flexible method to track UV light. The devices overcome existing drawbacks such as limited battery life, allowing for broader use in outdoor activities and optimizing light-based treatments for skin conditions.
The device can measure multiple wavelengths of light, including UVB and UVA, to optimize treatment of neonatal jaundice, skin diseases, seasonal affective disorder, and reduce the risk of sunburns and skin cancer. It enables precision phototherapy and warns users of impending sunburns.
Researchers create long-lasting rewritable paper by layering blue dye and black toner, which remain legible for more than six months. The material can be reset by cooling it down to 14 F, allowing for over 100 reuse cycles.
A team of Clemson University astrophysicists measured the total starlight ever produced throughout the history of the observable universe using data from NASA's Fermi Gamma-ray Space Telescope. They found that this light translates to approximately 4x10^84 photons, which is a vast amount considering most of it comes from distant galaxies.
Scientists from the Max Born Institute have created the first refractive lens that focuses extreme ultraviolet beams, utilizing a jet of atoms instead of traditional glass. This innovation enables novel approaches to image biological samples on extremely short timescales, with potential applications in microscopy and structural analysis.
Exposure to whole-body blue light significantly reduces systolic blood pressure by almost 8 mmHg, similar to blood pressure lowering drugs. Blue light also improves other cardiovascular risk markers such as arterial stiffness and increased blood vessel relaxation.