Articles tagged with Ultraviolet Radiation
Scientists have created a bio-based sunscreen active ingredient from soybean oil, providing a natural solution to replace hazardous ingredients in personal care products. The new agent, feruloyl soy glycerides, absorbs both UV-A and UV-B light while being anti-aging and anti-wrinkle.
NASA scientists found a significant increase in UV radiation over the past three decades, particularly in mid-and-high latitudes, attributed to declining ozone levels and increased cloudiness in the southern hemisphere. Despite this, UV levels have stabilized since the mid-1990s, with some areas seeing minimal changes.
Researchers use a novel light activation technique to turn modest molecules into powerful protein destroyers, expanding the search for new therapies. The new technique, CALI, uses a 'warhead' molecule capable of inactivating nearby proteins when triggered by light.
Researchers at NYU and U. of Würzburg identified how photoreceptor cells in the fruit fly Drosophila use distinct spectral sensitivities for color vision and motion detection. Flies with impaired R7 or R8 photoreceptors showed preferences for specific colors, revealing separate channels for color and motion.
Researchers create photoswitch composed of dithienylethene, which paralyzes C. elegans worms with ultraviolet light and reverses paralysis with visible light
Researchers create a high-speed optical system using multi-element transmitters and receivers for secure, low-interference communications in restricted areas like hospitals and aircraft. The system can transmit at gigabit per second speeds over gigahertz bands.
A new study found that UV-blocking contact lenses can reduce or eliminate the effects of the sun's harmful UV radiation. The lenses, such as Senofilcon A, provide an additional layer of protection against UV-induced damage to the cornea and lens, including cataracts.
The new Hubble image showcases over 12 billion years of cosmic history, from star birth to galaxy assembly. The image combines multiple colors to reveal details about galaxy distances and stellar populations.
Researchers create photoswitch that triggers and reverses paralysis in C. elegans worms using ultraviolet and visible light. The study demonstrates the potential of such 'photoswitches' in medicine and research applications.
Researchers have developed a novel detector molecule that can sense cyanide in water at normal pH levels and emit light, offering a potential solution for protecting people from cyanide-laced drinking water. The molecule's modular structure allows it to be modified to enhance its sensitivity and detect different toxins.
Researchers at Emory University have identified the first fish species to switch from ultraviolet to violet vision, a significant find in understanding natural selection. The scabbardfish's ability to detect blue light is linked to environmental factors and molecular evolution.
A study by Ascensión Riva and colleagues reveals that darker fabric colors offer superior UV absorption, with deep blue shades providing the highest level of protection. This research could lead to more affordable and effective sun-blocking fabrics for consumers.
The sun undergoes intense fluctuations every 11 years, but most of it remains invisible to human eyes due to its high-energy EUV radiation. The new EVE sensor will improve our understanding of the sun's behavior and potential changes by measuring EUV emissions with unprecedented accuracy.
Researchers in Australia have developed the first efficient diamond Raman laser, achieving an efficiency of 63.5%, comparable to existing lasers built with other materials. This technology has potential applications in defense technologies, trace gas detectors, medical devices, and satellite mapping.
The Lunar Reconnaissance Orbiter's LAMP instrument uses Lyman-alpha emissions to study permanently shadowed regions of the moon's surface. Researchers are searching for water frost and other resources in these areas, which could support future lunar missions.
Researchers used photoswitches to target enigmatic nerve cells in zebrafish, finding they trigger burst swimming and lower threshold for reflex movement. The discovery could have implications for human neurological disorders.
A University of Toronto study reveals climate change will reduce UV radiation in northern high latitude regions such as Siberia, Scandinavia and northern Canada, while increasing it in other areas like the tropics and Antarctica.
Researchers have discovered that highly charged tungsten ions can emit intense light in the extreme ultraviolet spectrum, similar to sodium atoms. This finding provides a promising alternative for diagnosing fusion reactor conditions, such as temperature and density.
Astronomers have discovered a giant galaxy surrounding the most distant black hole ever found, 12.8 billion light-years from Earth. The galaxy is as large as the Milky Way and harbors a supermassive black hole with at least a billion times more matter than our sun.
Researchers at Purdue University are developing a new plasma-based lithography to create extremely thin features in computer chips, replacing current ultraviolet light technology. The goal is to extend Moore's law by creating nanolithography that can produce fine features without using conventional methods.
Researchers at NIEHS found an association between UV radiation and the frequency of dermatomyositis in women. Women with higher UV levels were more likely to develop this form of myositis, which weakens muscles and causes distinctive rashes.
The International Agency for Research on Cancer (IARC) has reclassified sunbeds and UV radiation as Group 1 carcinogens, increasing the risk of skin melanoma by 75% among young users. The IARC also found a positive association between UV-emitting tanning devices and ocular melanoma.
Researchers found bats possess two spectral cone photoreceptor types for daylight and colour vision, as well as increased sensitivity to UV light in cone-stimulating conditions. This adaptation is expected to improve visual orientation at twilight, predator avoidance, and flower detection.
Berkeley Lab researchers produced non-toxic magnesium oxide nanocrystals that emit bright blue light, which could be used in bio-imaging or solid-state lighting. The nanocrystals also have the potential to play a role in long-term storage of carbon dioxide, a key technology for mitigating global warming.
Physicists at Kansas State University have developed a model to compute the energy and timing of electrons emitted from metals using ultra-short laser pulses. This breakthrough enables researchers to study chemical reactions and understand the basics of chemistry, biology, and life.
Plant physiologists use UV LEDs to create darker, redder lettuce rich in antioxidants, potentially improving human health. The effect is most noticeable at specific wavelengths and increases with light intensity.
A study published by the American Urological Association found that well water intake is directly associated with bladder cancer incidence in women and mortality rates in both sexes. In contrast, exposure to solar UV radiation is inversely associated with bladder cancer incidence and mortality rates in both men and women. Cigarette smo...
Researchers at PTB found that with xenon, a whole light-wave packet seems to knock out a huge number of internal electrons, dependent on material properties. This discovery challenges current models of the photoelectric effect and has significance for future experiments in materials research.
Comets are analyzed using Swift's Ultraviolet/Optical Telescope, which separates wavelengths of ultraviolet light to study gases surrounding the icy bodies. Cometary X-ray emission is also detected, providing insights into the process of charge exchange between solar ions and comet gases.
Researchers discovered an antioxidant, ellagic acid, which prevents collagen destruction and inflammatory response in human skin cells and mice exposed to UV-B. The study found that ellagic acid reduces MMP secretion and inflammation, demonstrating its potential to prevent wrinkle formation and photo-aging.
Researchers at Princeton University developed a new method that scrambles light to capture more detail in images. By leveraging nonlinear optical materials, the technique can create high-resolution images without sacrificing wide-angle perspective.
Researchers use tightly focused blue and ultraviolet light to create patterned lithography on a substrate, resulting in smaller structures. The new technique has potential applications in constructing nanomotors and may lead to advancements in Moore's Law.
Researchers design a lock-like molecule that controls blood clotting based on exposure to light. The biological hardware could be used to prevent the formation of tiny blood vessels that feed tumors, and also release drugs only on diseased cells or organs. This technology has potential applications in cancer treatment and drug delivery.
Researchers found evidence of abundant oxygen in ancient ocean and atmosphere, dating back 3.46 billion years. The discovery suggests early life forms like cyanobacteria produced oxygen 3.46 billion years ago.
A new simulation reveals a future where nearly two-thirds of the Earth's ozone is depleted, leading to extreme UV radiation and severe skin cancer rates. The study used a comprehensive model to simulate the consequences of banning ozone-depleting substances, confirming the effectiveness of the Montreal Protocol.
Researchers used guinea pigs to test air disinfection methods, finding that UV lights and negative ionizers reduced TB transmission. The study showed a significant decrease in TB infection rates when UV lights and fans were used to ventilate patient room air.
Researchers found that installing UV C lights can reduce TB transmission, including drug-resistant strains. The study showed a 35-45% reduction in infection rates when UVC lights were used.
Researchers at the University of Illinois Chicago have developed a method to filter out interfering signals in LIBS, allowing for more accurate analysis of suspected bombs and other hazardous materials. By using polarizing filters, they improved sensitivity while reducing costs.
A recent experiment studying the effects of ultraviolet radiation on liverwort asexual propagules found that students successfully formulated and tested hypotheses about UV impact. The study aims to understand how bryophytes develop protection mechanisms against UVR, which can inform crop resilience.
Researchers at Vanderbilt University have developed the world's smallest periscope, allowing for multi-vantage-point imaging of cells and micro-organisms. This technology enables scientists to study dynamic processes within cells in three dimensions, providing a high resolution form of microscopy.
Comet Lulin is releasing a great amount of gas, making it an ideal target for X-ray observations. Swift's UVOT detects hydroxyl molecules, revealing a cloud spanning nearly 250,000 miles, while the XRT sees X-rays from the comet's atomic cloud.
A study published in HortScience found that foliar particle film can increase the weight of red-skinned wine grapes by 7% and soluble solids concentration by 11%. However, it did not prevent sunburn on exposed fruit when vines were under stressful growing conditions. The results support anisohydric classification for these grapes.
Researchers have discovered that blue light can effectively destroy two common strains of methicillin-resistant Staphylococcus aureus (MRSA) in a laboratory setting. The study found that high-dose photo-irradiation using 470-nm blue light was able to kill up to 90.4% of the bacteria, making it a promising potential treatment for MRSA i...
A recent study published in Photochemical & Photobiological Sciences found that UV light-enhanced tooth bleaching causes significant damage to skin and eyes, with fair-skinned individuals at greater risk. Additionally, the treatment was also found to exacerbate existing dental issues, such as exposed grooves on teeth.
Gallium Nitride (GaN) LED lights could cut the proportion of UK electricity used for lighting from 20% to 5% if widely adopted, potentially saving eight power stations. GaN LEDs also offer long lifespan and environmental benefits over traditional bulbs.
Researchers have discovered a way to produce brilliant white light using zinc oxide and sulfur, with potential applications for energy-efficient and safe illumination. The new material has been shown to convert invisible ultraviolet light into natural white light, offering advantages over current fluorescent bulbs and LEDs.
Scientists study Venus' atmosphere using instruments on board ESA's Venus Express, discovering high-contrast zones created by a mysterious chemical that absorbs ultraviolet light. Clouds are found at similar heights across dark and bright regions, with temperature variations influencing atmospheric dynamics.
A new method for overcoming two major hurdles facing solar energy has been discovered and demonstrated by researchers at Rensselaer Polytechnic Institute. The antireflective coating boosts the amount of sunlight captured by solar panels, allowing them to absorb the entire solar spectrum from nearly any angle.
Ripe bananas exhibit bright blue luminescence when exposed to UV light, attributed to breakdown products of chlorophyll. The intensity of the glow decreases as ripening progresses.
A European study found that blue light exposure combined with low antioxidant levels increases the risk of age-related macular degeneration (AMD) in older adults. The study recommends increasing consumption of antioxidant-rich foods and wearing protective eyewear to reduce this risk.
Researchers found that individuals with low antioxidant levels and high sunlight exposure are at a higher risk of developing advanced macular degeneration. The study also found that blue light exposure is associated with the development of early stages of AMD, especially in middle-aged individuals.
DNA's photostability is influenced by its base sequences, with different combinations exhibiting varying fluorescence lifetimes. This discovery could lead to new diagnostic methods and potentially repair gene mutations using laser radiation.
Leading researchers call for ban on indoor tanning beds and publicity claiming safety, highlighting increased risk of melanoma and DNA damage from UV exposure. Published data suggest a link between indoor tanning and an increased risk of melanoma, making a 'safe' tan with UV radiation unlikely.
Scientists have discovered that tiny particles of titanium dioxide can kill bacteria and destroy dirt when exposed to UV light. The new paint formulations show improved antibacterial efficiency, with some reducing bacterial survival by up to 80%.
Researchers have discovered a new way that organisms sense light, which may lead to insights into human sensory perception. The study found that exposing paralyzed worms to ultraviolet light restored normal movement levels in the animals.
A new study has identified a key molecular sensor in worms that allows them to respond to ultraviolet light, which may provide insights into nerve cell communication and learning. The discovery could potentially lead to new treatments for conditions such as depression and sleep disorders.
Researchers have developed a novel method to kill tumor cells using nanoparticles and light. The technique employs quantum dots that emit light when exposed to megavoltage x-rays, which triggers the cancer-killing activity of Photofrin. This approach could be more effective in treating deeply seated tumors than current methods.
Researchers found that UVA1 phototherapy is effective for patients with morphea and related diseases regardless of skin type. The study analyzed over 100 patients and showed no significant correlation between skin type and clinical improvement scores.
A new research study published in the FASEB Journal reveals that UVB light is more likely to cause DNA damage and lead to skin cancer than UVA light. This finding has significant implications for public health officials and government regulatory agencies, who can now use this information to develop more effective sunscreen products.
Scientists at NIST have confirmed that EUV photoresist sensitivity is twice the previously believed value. The finding raises concerns about optical system effectiveness in current demonstration tools. This discovery has significant implications for high-volume manufacturing processes in development.