Articles tagged with Sunlight
A new study reveals that marimo algae balls are susceptible to photoinhibition when exposed to high light intensities and low water temperatures. Researchers found that while the algae can recover from brief periods of bright sunlight, prolonged exposure leads to cell damage and death.
Researchers discovered two ion transport proteins, VCCN1 and KEA3, that dynamically adjust photosynthetic performance in response to light fluctuations. The study found that these proteins play a crucial role in protecting plants from excessive sunlight and optimizing growth under varying light conditions.
Researchers from City University of Hong Kong developed a novel device-engineering strategy to suppress energy conversion loss in organic photovoltaics, achieving PCE over 19%. The discovery enables OPVs to maximize photocurrent and overcome the limit of maximum achievable efficiency.
Scientists have decoded the signals plants send themselves to initiate photosynthesis, a process turning sunlight into sugars. The newly identified proteins control communication between plant cells and organelles, potentially leading to breakthroughs in cancer research and improving crop yields.
Researchers found that vitamin D deficiency increases the risk of dynapenia, an age-associated loss of muscle strength, by 70-78%. Vitamin D supplementation was shown to reduce this risk. The study analyzed data from over 3,000 individuals aged 50 and over, highlighting the importance of vitamin D for maintaining muscle strength.
A research team at Lund University has successfully used mirrors to enhance light interaction with antenna complexes in photosynthesis. This breakthrough could lead to more efficient energy transfer processes and eventually be used to produce fuel from carbon dioxide, a promising solution for the climate crisis.
Researchers studied diatom shells to understand how they perform photosynthesis in low-light conditions. They found that the frustule can contribute a 9.83% boost to photosynthesis, especially during transitions from high to low sunlight.
KAUST researchers have designed a smart glass system that can encode data into the light passing through it, allowing for wireless data transmission. The system uses polarization manipulation to eliminate flicker problems and can transmit data at rates of up to 16 Kilobits per second.
A new study predicts that climate change will increase rainbow viewing opportunities in northern latitudes and high elevations, while decreasing them in tropical regions. The research used photographs from Flickr to map rainbow occurrences under current and future climates.
Scientists at EPFL have developed a method to enhance the packing of photosensitizer dye molecules, resulting in DSCs with power conversion efficiencies of up to 28.4% and long-term operational stability. This breakthrough offers promising prospects for applications as power supply and battery replacement for low-power electronic devices.
The study analyzed DNA methylation in skin tumor samples, revealing correlations between changes in proteins regulating the organism and prognosis. The results identified potential markers of patient survival and suggested a new route for understanding melanoma subtypes.
Researchers have discovered that small eddies, swirling at the edges of massive ocean currents, are a key source of nutrients for phytoplankton. These nutrient-rich eddies help maintain healthy populations of phytoplankton, which are essential for carbon sequestration and mitigating climate change effects.
A University of Houston professor has developed a nonreciprocal solar energy harvesting system that surpasses the thermodynamic limit and clears the way to use solar power 24/7. The new system can achieve significant efficiency boosts, paving the way for practical applications in power plants.
Researchers found that shadows on single cells or parallel-connected cells result in similar output current decrease ratios to sunlight. However, series-connected cells experience excess power loss and temperature rise, leading to further degradation.
Brown algae's unique pigments have evolved through a complex genetic pathway, enabling them to harness more light energy than green plants. This discovery could lead to insights into fucoxanthin's health applications and improved photosynthetic efficiency for biofuels production.
Researchers from Gwangju Institute of Science and Technology design a novel approach to create durable organic semiconductor photocathodes, enabling high-efficiency conversion of solar energy to hydrogen. The developed photocathodes demonstrate remarkable stability and can produce hydrogen under actual sunlight.
Researchers at Rice University have created stable and efficient halide perovskite solar cells by finding the right solvent design to apply a 2D top layer on top of a 3D bottom layer. The new method achieves high power conversion efficiencies, comparable to commercially available solar cells, while maintaining stability.
Researchers from Gwangju Institute of Science and Technology developed a method to control active layer morphology in organic solar cells using water treatment. This approach led to more uniform thin films and higher power conversion efficiencies compared to non-treated samples. The study paves the way for large-scale, efficient organi...
Researchers at KAUST have discovered that the energy level alignment between donor and acceptor components in organic solar cells is crucial for device performance. Contrary to current belief, blends with little to no difference in one energy level metric were found to be poor performers.
Scientists have developed a new solar-powered laser with improved conversion efficiency, enabling more stable and efficient space-based energy generation. The design features four mirrors and laser rods, allowing for precise control over the pump cavity and minimizing thermal stress effects.
Scientists at UC San Diego have illuminated the role of key neurons that alter function in response to seasonal changes in light exposure. The study found that neurons change expression of neurotransmitters in response to day length stimuli, triggering behavioral changes.
Researchers have developed a novel hydrogel-glass design that enhances indoor illumination while reducing cooling consumption, demonstrating potential for widespread energy savings in buildings. The study published in Frontiers of Optoelectronics shows significant reductions in energy use ranging from 2.37 to 10.45 MJ·m−2 ·year−1.
Researchers led by Cornell University are evaluating the potential of making the stratosphere 'brighter' to cool the Earth. They use geoengineering simulations to assess the impact of injecting sulfate aerosols, a known pollutant, on climate change mitigation strategies.
University of Arizona students developed a comprehensive study to track and characterize the brightness of satellites. The team's work could help astronomers adapt by closing their telescopes' shutters during incoming bright satellites.
Researchers at Surrey's Advanced Technology Institute have developed a renewable and rechargeable battery prototype that can charge smart wearables in just seconds using sunlight. The system, which combines zinc-ion batteries with perovskite solar cells, enables wearables to operate continuously without plug-in charging.
Aerosol particles in the atmosphere have a bigger impact on cloud cover than previously thought, increasing it by approximately 10%. Clouds hold more water before rainfall occurs due to smaller and more numerous droplets, leading to reduced precipitation. The study uses satellite data and machine learning to improve climate models.
A new study found that coral spawning events at deeper depths occur at lower intensities than those in shallow waters. The researchers suggest that deep reefs may more often rely on shallow-reef corals to survive.
Research suggests that climate change is causing dryland mechanisms to affect temperate regions, leading to changes in vegetation distribution and ecosystem processes. The study predicts that by the end of the century, an estimated 17 million km2 of non-dryland areas will experience average topsoil temperatures above 40°C.
A team of scientists has designed a system that uses water, CO2, and sunlight to produce synthetic kerosene, which can power long-haul commercial flights. The design has been implemented in the field, and its efficiency is around 4%, with plans to improve it to over 15%.
Scientists at KIT create a prototype for fully scalable all-perovskite tandem solar modules with an efficiency of up to 19.1 percent, enabling commercial viability through optimized light paths and established industrial coating methods.
Using concentrated sunlight, a team of researchers from Sandia National Laboratories successfully roasted green chile, achieving comparable results to traditional propane roasting. The study found that solar power reduces greenhouse gas emissions by 2.68 pounds per 22 pounds of green chile roasted.
Scientists have developed artificial photosynthesis to produce food in the dark, bypassing sunlight's need. This technology converts CO2, electricity, and water into acetate, a key component of vinegar, boosting food production's conversion efficiency up to 18 times.
Researchers have discovered a way to create devices that mimic natural photosynthesis, producing fuels like hydrogen instead of sugars. The breakthrough uses bismuth oxyiodide, a non-toxic semiconductor material that can produce clean hydrogen from water over weeks.
Researchers have developed a single-cell PV design integrated with nonreciprocal optical components to provide 100-percent reuse of emitted radiation, breaking the Shockley–Queisser limit. This breakthrough enables a quasimonochromatic radiation converter to reach the theoretically maximum Carnot efficiency.
Researchers developed a hot-carrier multijunction solar cell that maintains high conversion efficiency with nonoptimal materials, expanding the scope of candidate designs. The novel architecture showed superior resilience to design imperfections, widening the range of suitable materials and operating conditions.
Researchers at North Carolina State University have developed a new technique for extracting hydrogen gas from liquid carriers, making it faster, less expensive and more energy efficient. The new method uses sunlight and a reusable photocatalyst to release hydrogen molecules, reducing the need for rhodium and lowering production costs.
Researchers from Tokyo Tech developed an alumina-supported iron-based catalyst that efficiently converts CO2 into formic acid with up to 90% selectivity. The new catalyst's excellent recyclability and low-cost nature make it a promising candidate for reducing atmospheric CO2 levels and providing energy via combustion.
A new Stanford University study reveals that sunscreens containing oxybenzone can damage coral reefs, hastening their demise. The researchers found that oxybenzone forms damaging radicals when exposed to sunlight and can also disrupt coral defense mechanisms.
A breakthrough in green technology has successfully produced both hydrogen gas and hydrogen peroxide simultaneously from sunlight and water using a hematite photocatalyst. This innovation could lead to a solar water-splitting utilization system with greater added value, enabling the widespread adoption of carbon-neutral energy sources.
Researchers at the University of Cologne and the University of Wuppertal have developed a tandem solar cell that achieves an unprecedented 24% efficiency, outperforming previous records. The innovative design combines organic and perovskite-based absorbers with an indium oxide interconnect to minimize losses.
Researchers at Florida Atlantic University found that increasing sun exposure in rehabilitation facilities can enhance health and recovery in green sea turtles with fibropapillomatosis. Vitamin D levels increased significantly in turtles exposed to higher UV light, leading to less tumor regrowth and improved overall health.
Researchers at Cornell University have discovered a way to use light and oxygen to upcycle polystyrene into benzoic acid, a product stocked in chemistry labs and used in various products. The process is mild, climate-friendly, and scalable to commercial waste streams.
Researchers at Chalmers University of Technology have successfully converted solar energy into electricity using a thermoelectric generator. The new technology can store solar energy for up to 18 years and release it when needed, making it a promising solution for renewable energy production.
A team of scientists has developed a solar-powered water filter that can remove pathogens, pesticides, and micropollutants from contaminated water. The filter uses titanium dioxide (TiO2) nanowires and carbon nanotubes to produce reactive oxygen species that kill bacteria, viruses, and other microorganisms.
Researchers at LMU München experimentally refute Förster's resonance energy transfer theory, instead showing that light energy is transferred through molecular vibrations. This discovery has implications for the development of optical technologies and may revolutionize our understanding of energy transfer in molecules.
Researchers at MIT have developed a new system that can automatically clean solar panels without using water, reducing dust accumulation's impact on efficiency. The system uses electrostatic repulsion to detach dust particles, improving overall power output and potentially saving $200,000 in annual revenue.
Scientists at Nanyang Technological University, Singapore, have developed a durable coating that prevents fogging and 'self-cleans' under sunlight exposure. The coating shows excellent adherence to the plastic surface and maintains durability in tests, offering an attractive long-term solution for various applications.
Researchers demonstrate a two-terminal tandem solar cell with enhanced efficiency through spectrum splitting, achieving a 5-6% gain in absolute efficiency. The design uses planar and Lambertian spectral splitters to effectively distribute sunlight among the top and bottom cells.
Researchers at MIT and China developed a desalination system that is both more efficient and less expensive than previous methods. The system uses natural convection to draw salt from the water, eliminating the need for wicks or power sources.
A new internet-connected lighting system for greenhouses can optimize lighting and reduce electrical costs by up to 33% by predicting sunlight. The system uses sensors and algorithms to adjust light levels, making the most of natural sunlight and minimizing energy waste.
A joint project by Paderborn, Rostock, and Mainz universities aims to develop new iron compounds that can convert sunlight into chemically usable energy. The researchers hope to reduce greenhouse gas emissions and create a more sustainable future.
A Kyoto University-led team has created a novel hydrogen plant design that harnesses fully renewable resources to produce clean hydrogen with minimal associated CO2 emissions. The SABI-Hydrogen system uses solar heating and biomass gasification to produce hydrogen, resulting in an emission rate of only 1.04kg CO2/kg hydrogen produced.
Researchers have discovered that certain microorganisms, such as Nitrosopumilus maritimus, can produce oxygen in the absence of sunlight, possibly deep below the ocean surface. These microbes play a crucial role in the nitrogen cycle and remove bioavailable nitrogen from the environment.
A new UNSW Sydney-led study has finally confirmed the mechanism behind comet tails never being green. The team recreated the galactic chemical process in a vacuum chamber and used lasers to break apart dicarbon molecules, proving physicist Gerhard Herzberg's theory correct after 90 years.
Researchers developed a material that automatically responds to changing temperatures, switching between heating and cooling. The glass can regulate both solar transmission and radiative cooling, reducing energy consumption up to 9.5% or ~330,000 kWh per year.
Scientists developed an all-season smart-roof coating that automatically switches between cooling and heating, outperforming commercial cool-roof systems in energy savings. The technology uses vanadium dioxide to regulate its rate of radiative cooling, overcoming the problem of overcooling in winter.
A new device has been developed that converts sunlight into two promising sources of renewable fuels – ethylene and hydrogen. The researchers found that by optimizing the working conditions for cuprous oxide, a promising artificial photosynthesis material, they can create a more stable system.
A new study found that kids, teens and young adults who spend more time outdoors during the summer months have a lower risk of developing multiple sclerosis (MS) as children. The research also suggests that greater time spent outdoors in the first year of life is associated with lower odds of MS.
A new fluid has been created that can be molded and patterned using light, with potential applications in adaptive optics, mass transport, and microfluidics manufacturing. The fluid's surface tension is dependent on temperature, making it susceptible to laser manipulation.
A research team discovered a quantum confinement effect in a 3D-ordered macroporous structure of BiVO4, enabling hydrogen production under visible light. The study found that the 3DOM structure had higher photocatalysis efficiency and produced more oxygen than its plate-like counterpart.