Lenses are one of the most commonly used optical components in daily life, including eyeglasses, microscopic objectives, magnifying glass, and camera lenses. Conventional lenses are based on the principle of light refraction, using different materials, spherical surfaces and spatial positions to achieve the control of light. The fabrication of conventional lenses including the processes of material selection, cutting, rough grinding, fine grinding, polishing, and testing.
Native to India, teak is the go-to species for reforestation in Central America. But teak often underperforms in the nutrient poor soils that dominate tropical landscapes. To discover if the timber value of teak plantations grown on poor soils can be increased, scientists at the Smithsonian Tropical Research Institute interplanted rosewood and amarillo, both economically valuable native tree species.
What The Study Did: The goal of this study was to compare International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD-10) codes with manual electronic medical records review in capturing symptoms of fever, cough and shortness of breath (dyspnea) among patients being tested for SARS-CoV-2 infection.
Authors: Rashmee U. Shah, M.D., M.S., of the University of Utah School of Medicine in Salt Lake City, is the corresponding author.
You have just enjoyed a delicious summer BBQ. After approximately eight hours, food molecules reach your small intestine, where specialized lymph capillaries, called lacteals, absorb fat nutrients. Lacteals are different from other lymphatics, as they continue to regenerate during adulthood, with a slow, but steady pace. Their unique renewal capacity is still poorly understood.
Researchers at the University of Maryland (UMD) have discovered an entirely new role for a well-known plant molecule called ACC, providing the first clear example of ACC acting on its own as a likely plant hormone. Just like in humans and animals, hormones in plants carry messages to signal and trigger essential processes for plant health and functionality, from reproduction to defense. Without these processes, crops can't reproduce and thrive to provide the food we need to feed a growing global population.
A world-first study examining the scales of management of the Great Barrier Reef has the potential to help sustain other ecosystems across the world.
Massive marine ecosystems like the Great Barrier Reef aren't just a vibrant home to fish, corals and other creatures, they are also an important source of people's food, livelihoods and recreation.
Ammonia is a generic precursor for the manufacture of essential fertilizer and most nitrogen-containing organic chemicals. To date, industrial ammonia production is predominantly conducted by the Haber-Bosch process, in which nitrogen is fixed using the chemical reductant hydrogen. However, despite the development for more than one hundred years, this process still requires harsh conditions including high temperatures (673-873 K) and pressures (20-40 MPa), accounting for 1.5% of worldwide energy consumption.
Crop scientists, molecular and computational biologists from two leading St. Petersburg Universities and Federal Centre for Bast Fiber Crops teamed up to sequence and assemble genome of Fusarium oxysporum f.sp. lini, a highly destructive fungal parasite infecting flax.
A new study led by the Department of Biosciences at Durham University, UK, is the first large-scale assessment of how recent changes in both climate and land cover have impacted populations of migrating birds.
EUGENE, Ore. - Aug. 14, 2020 - Volcanic eruptions in the Cascade Range of the Pacific Northwest over the last 2.6 million years are more numerous and closely connected to subsurface signatures of currently active magma than commonly thought, according to newly published research.
Supercomputers around the world work around the clock on research problems. In principle, even novel materials can be simulated in computers in order to calculate their magnetic and thermal properties as well as their phase transitions. The gold standard for this kind of modelling is known as the quantum Monte Carlo method.
A new study from the Beckman Institute for Advanced Science and Technology describes how existing infrared technology can be adapted to measure recognition memory and other cognitive outcomes in infants.
The European Union aims to achieve climate neutrality by 2050 and is relying largely on renewable electricity to reach this goal. The implementation of this energy transition is the subject of heated debate: A continental-scale system that concentrates energy generation infrastructure in the most suitable locations would provide the most affordable solution but many citizens favour smaller, more dispersed supply networks. A new study prepared by researchers in Potsdam and Zurich shows that the implementation of such systems would not incur significant additional costs.
Massive, rapid production of vaccines to fight COVID-19 will require firms to share know-how not just about what to make, but how to make it, write Nicholson Price and colleagues in this Policy Forum. They cite the recent approval granted by the U.S. Department of Justice to six pharmaceutical firms to exchange "technical information" on manufacturing processes related to monoclonal antibody (mAb) candidates as an example - one that might pave the way for standardizing manufacturing of biologics going forward.
Key knowledge gaps exist in our understanding of how ocean microplastics transport bacteria and viruses - and whether this affects the health of humans and animals, researchers say.
With millions of tons of plastic reaching the world's oceans every year - and trillions of particles floating on the surface - the potential impacts of plastic pollution are vast.
Plastic particles are known to carry specific combinations of metals, pollutants and pathogens (bacteria, viruses and other microorganisms that can cause disease).