Новости за 09.01.2024

Researchers at the University of Regensburg and the Graz University of Technology have shown that hydrogen atoms at the sides of molecules lying on a surface can directly be seen. The study, published in the journal Proceedings of the National Academy of Sciences, describes that by looking beside the molecules, the position and presence of the previously-hidden hydrogen atoms could be revealed.

By bringing together data from two NASA telescopes, astronomers may have solved a mystery around a bizarre structure found in the debris field of an exploded star. Their work has uncovered new details about the star's remains, and about the explosion itself.

An agricultural fungicide approved in the U.S. and currently under consideration by authorities worldwide could have a devastating effect on a new drug for one of world's deadliest infectious diseases, show University of Manchester scientists.

Educational reform should embrace learners' diversity, provide equitable access to foster attendance and promote student interest in learning through child-centered teaching, finds a new study from the Brown School at Washington University in St. Louis.

Financial rewards may be more motivating for people living in Western, educated, industrialized, rich, and democratic (WEIRD) countries, than for people from non-WEIRD countries, reports a study published in Nature Human Behaviour.

A trio of mechanical engineers at Seoul National University has found that the shape of a water jet dropped into a glass of water is the determining factor in the noise that results. In their paper published in the journal Physical Review Fluids, Mouad Boudina, Joonoh Kim and Ho-Young Kim describe experiments they conducted with a falling water stream colliding with still water.

Light-emitting diodes (LEDs) have revolutionized modern lighting and sensing technology. From applications in our homes to industry, LEDs are used for all lighting applications, from indoor lighting over TV screens to biomedicine. Widely used organic LEDs (OLEDs) today, for example in smartphone screens, employ organic thin-film materials as a semiconductor. However, their maximum brightness remains limited; just think of trying to read your smartphone screen on a very sunny day.

Badminton traces its roots back more than a millennium, but the modern version of the racket game originated in the late 19th century in England. Today, it is the second most popular sport in the world behind soccer, with an estimated 220 million people who enjoy playing. For the last three decades, badminton has been a competitive Olympic sport, and with "bird" speeds topping 300 mph in "smash" shots, it certainly makes for an exciting spectator sport.

Feldspar is a ubiquitous mineral and makes up about half of the Earth's crust. In the Earth's atmosphere, feldspars play a surprisingly important role. Fine powder carried by air influences cloud formation. Water molecules adhere better to feldspar dust than to other particles. Tiny feldspar grains, floating in the atmosphere, thus become excellent nucleation seeds, where water molecules stick and freeze, eventually forming a cloud.

By breaking down flooding analysis into its main physical mechanisms, researchers at Princeton have projected that climate change will markedly impact river basin flooding across the United States during the 21st century.

Bile ducts are pathways that carry hepatocyte-produced bile from the liver to the small intestine. In the human fetal liver, bile ducts are formed from bile duct epithelial cells surrounding the portal vein, and hepatocytes form on the outside. Both bile duct epithelial cells and hepatocytes are formed by the differentiation of common progenitor cells (hepatoblasts).

Accurate quantification of multi-animal behavior plays a pivotal role in unraveling the intricacies of animal social interactions with far-reaching applications in neuroscience and ecology.

How meanings align across languages suggests that translation and cross-cultural communication may be challenging, but researchers haven't been clear as to what characterizes this alignment, and what factors might affect it.

Amino acids, such as tyrosine and tryptophan, are the fundamental building blocks that make up proteins. These biomolecules have different chemical groups on each end and side chain, and so, have the natural ability to form a chain through the formation of an amide (peptide) bond. However, such linkages are weak and easily degraded under physiological conditions. This is where the Fmoc-protected amino acids come into the picture.

An international team of evolutionary biologists and natural scientists has found that the population decline of the Tasmanian devil is likely leading to genetic changes in another local predator—the spotted-tailed quoll. In their study, reported in Nature Ecology & Evolution, the group collected quoll tissue samples and conducted a genetic analysis and comparison of quolls over 15 generations to learn more about their evolutionary history during the time the devils have been in decline. A Research... Читать дальше...

Physicians for Social Responsibility and five Colorado advocacy groups are suing Transportation Secretary Pete Buttigieg, Interior Secretary Deb Haaland and four federal agencies to halt work on a trail through Rocky Flats National Wildlife Refuge.

A skin resembling armor, rapid healing abilities, continuous tooth renewal and the capability for limb regeneration—this might sound like the description of a creature from a superhero film. Surprisingly, these are standard features of a well-known animal: sharks.

A new study in Physical Review Letters illuminates the intricacies of energy exchanges within bipartite quantum systems, offering profound insights into quantum coherence, pure dephasing effects, and the potential impact on future quantum technologies.

For decades, scientists have used satellite data to assess the health and greenness of Earth's vegetation. These data have influenced our understanding and decision-making on pressing issues from sustainable crop production to climate change.

Ammonia is a necessary feedstock to produce nitrogen-based fertilizers, chemicals, pharmaceuticals, and polymers. To date, about 80% of global ammonia is used to produce nitrogen-based fertilizers which relates to 50% of global food production.

A plan to build headlands and an artificial reef has been selected from three proposals by international design firms for a pilot project to restore and retain sand on Oceanside's eroded beaches.

The Jet Propulsion Laboratory laid off 100 contractors last week and will scale back part of the first-ever effort to bring pieces of Mars to Earth, after a cost-cutting order from NASA that lawmakers called "short-sighted and misguided."

A team of chemists and planetary scientists from Worcester Polytechnic Institute, Nanoplanet Consulting and MIT has found evidence that a form of life that uses sulfuric acid as a liquid medium could exist in some of the clouds covering Venus. The team has published their paper on the arXiv preprint server.

Using the James Webb Space Telescope (JWST), astronomers have investigated a nearby sub-Earth exoplanet known as Gliese 367 b. The obtained results indicate that this alien world is dark, hot and lacks a detectable atmosphere. The new findings were published January 2 on the pre-print server arXiv.

Domino reactions occur when the transformation of one chemical group stimulates the reaction of another attached group, or another molecule, leading to a rapid knock-on effect through the system like a row of falling dominoes. Researchers at Hokkaido University have now achieved the first example of a domino reaction in the branch of chemistry called redox chemistry.