Новости за 09.09.2021

Beckman researchers paired microscopy with artificial intelligence to develop a COVID-19 test that's fast, accurate, and cost-effective. All we need to do is say "ahh."

Ohm's law is well-known from physics class. It states that the resistance of a conductor and the voltage applied to it determine how much current will flow through the conductor. The electrons in the material—the negatively charged carriers—move in a disordered fashion and largely independently of each other. Physicists find it far more interesting, however, when the charge carriers influence one another strongly enough for that simple picture not to be correct anymore.

The reusable cloth masks people have been using for the past year or more may look a little worse for the wear. But new research from the University of Colorado Boulder finds that washing and drying them doesn't reduce their ability to filter out viral particles.

The shea tree is a vital social and economic crop that is best known for the popular product shea butter—a multimillion-dollar ingredient used in cosmetics, personal care products, pharmaceuticals and chocolate. For hundreds of thousands of African families living in the "shea belt" it is also a crucial source of nutrition and income. Despite its increasing demand, the slow-growing shea tree is being threatened by other cash crops and its preservation most likely lies in its genetic improvement. To enable such work... Читать дальше...

Black bears (Ursus americanus) reproduced at a younger age in urban areas and were nearly twice the size of bears in national forests shortly after their first birthday, researchers from North Carolina State University and the N.C. Wildlife Resources Commission found in a new study.

Greenland may be best known for its enormous continental scale ice sheet that soars up to 3,000 meters above sea level, whose rapid melting is a leading contributor to global sea level rise. But surrounding this massive ice sheet, which covers 79% of the world's largest island, is Greenland's rugged coastline dotted with ice capped mountainous peaks. These peripheral glaciers and ice caps are now also undergoing severe melting due to anthropogenic (human-caused) warming.  However, climate warming... Читать дальше...

Scientists have found a new chemical process to turn a stinky, toxic gas into a clean-burning fuel.

What do shooting stars and astronaut safety have in common?

Previous fires may hold the key to predicting and reducing the severity of future wildfires in the western United States as fire activity continues to increase, according to researchers from Penn State and the U.S. Forest Service.

Protected forests are unlikely to be cut down when they are surrounded by intact forests. Conversely, the more degraded the boundaries of a protected area are, the more likely that deforestation will encroach into the protected forest as well.

New research more than doubles the estimated volume of ancient, salty groundwater stored deep within Earth's crust.

High-power laser pulses focused to small spots to reach incredible intensities enable a variety of applications, ranging from scientific research to industry and medicine. At the Berkeley Lab Laser Accelerator (BELLA) Center, for instance, intensity is key to building particle accelerators thousands of times shorter than conventional ones that reach the same energy. However, laser-plasma accelerators (LPAs) require sustained intensity over many centimeters, not just a spot focus that rapidly expands because of diffraction.

On April 20, 2010, the Deepwater Horizon (DWH) petroleum drilling rig exploded off the coast of Louisiana, resulting in the world's worst oil spill in history with more than 4 million barrels of oil released into the Gulf of Mexico. Though the short-term impact of the oil spill on local wildlife was widely researched among scientists and discussed in the media, there has been relatively little research on the long-term effects of the disaster. In a paper published this week in PLOS ONE, researchers from the California Academy of Sciences... Читать дальше...

In the face of a potentially disastrous storm like Hurricane Ida, people take to Twitter and other social media sites to communicate vital information. New research published in the journal Risk Analysis suggests that monitoring and analyzing this social media "chatter" during a natural disaster could help decision makers learn how to plan for and mitigate the impacts of severe weather events in their communities.

When scientists study unconventional superconductors—complex materials that conduct electricity with zero loss at relatively high temperatures—they often rely on simplified models to get an understanding of what's going on.

The S-matrix bootstrap is a numerical method that can be used to determine or constrain the scattering amplitudes of particles in quantum field theory using simple principles. Over the past few decades, some physicists have tried to use this technique to study different physics theories and phenomena.

Researchers from the Department of Physics, University of Helsinki, Finland and Jagiellonian University, Krakow, Poland found that a subtle hydrogen bonding rearrangement caused by an exercise-intolerance related mitochondrial disease mutation can perturb the normal functioning of the respiratory chain complex III. Complex III is one of the key enzymes that contributes to energy (ATP) generation in cells.

One in three trees worldwide are facing extinction, with human use among the greatest threats, according to the first State of the World's Trees report published September 1 by Botanic Gardens Conservation International (BGCI).

When a cloudy plume of ice and water vapor billows up above the top of a severe thunderstorm, there's a good chance a violent tornado, high winds or hailstones bigger than golf balls will soon pelt the Earth below.

Using a groundbreaking new technique at the National Institute of Standards and Technology (NIST), an international collaboration led by NIST researchers has revealed previously unrecognized properties of technologically crucial silicon crystals and uncovered new information about an important subatomic particle and a long-theorized fifth force of nature.

Johns Hopkins Medicine researchers report that food science principles have helped them determine how unusual droplets within cells stay organized and avoid dissolving into the rest of the cell's gelatinous interior.

Australia has received seemingly contradictory messages about coal this week.

Climate change is a truth of the 21st century that is difficult to avoid. The burning of fossil fuels in industry, for transport, and other everyday life activities of Homo sapiens has resulted in elevated levels of CO2 in the Earth's atmosphere. Extreme weather conditions as seen in recent flood, drought and fire events worldwide are some of the most obvious ways in which increasing CO2 levels are changing our world. But there are some serious effects that CO2 is having on our ecosystems that are less easily observed.

Do aliens exist? Extraterrestrial life has never been discovered. However, that doesn't mean it doesn't exist.

Lakes are essential components of global hydrological and biogeochemical cycles. River-connected lakes are characterized by high-frequency hydrological rhythms.