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Phys.org / Single-cell testing shows which antibiotics actually kill bacteria, not just stop growth
Drugs that act against bacteria are mainly assessed based on how well they inhibit bacterial growth under laboratory conditions. A critical factor, however, is whether the active substances actually kill the pathogens in ...
Phys.org / Orange pigments in birds and human redheads prevent cellular damage, study shows
A pigment that makes feathers and hair orange helps prevent cellular damage by removing excess cysteine from cells. Pheomelanin is an orange-to-red pigment that is built with the amino acid cysteine and found in human red ...
Phys.org / Radio telescopes uncover 'invisible' gas around record-shattering cosmic explosion
Astronomers using the U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO) instruments, the U.S. National Science Foundation Very Large Array (NSF VLA) and the Atacama Large Millimeter/submillimeter ...
Phys.org / Engines of light: New study suggests we could increase useful energy obtained from sunlight
Physicists from Trinity College Dublin believe new insights into the behavior of light may offer a new means of solving one of science's oldest challenges—how to turn heat into useful energy.
Tech Xplore / Perovskite solar cells maintain 95% of power conversion efficiency after 1,100 hours at 85°C with new molecular coating
Scientists have found a way to make perovskite solar cells not only highly efficient but also remarkably stable, addressing one of the main challenges holding the technology back from widespread use.
Phys.org / Laser pulse 'sculpting' unlocks new control over particle acceleration
In high-intensity laser–matter interactions, including laser-induced particle acceleration, physicists generally want to work with the highest possible focused laser peak power, which is the ratio of energy per unit area ...
Phys.org / 60,000-year-old traces of world's oldest arrow poison reveal early advanced hunting techniques
Researchers from South Africa and Sweden have found the oldest traces of arrow poison in the world to date. On 60,000-year-old quartz arrowheads from Umhlatuzana Rock Shelter in KwaZulu-Natal, South Africa, researchers have ...
Phys.org / Indian rocket hits snag during launch
An Indian rocket hit a snag during its launch Monday, forcing a deviation in flight path as it carried an Earth observation satellite and commercial payloads, the country's space agency said.
Phys.org / Seaweed farms boost long-term carbon storage by altering ocean chemistry, study shows
Seaweeds are versatile algae. They are sources of food, medicine, and many other products, and they have the added benefit of being extremely efficient at removing CO2 from the atmosphere as they grow.
Phys.org / North Pacific winter storm tracks shifting poleward much faster than predicted
Alaska's glaciers are melting at an accelerating pace, losing roughly 60 billion tons of ice each year. About 4,000 kilometers to the south, in California and Nevada, records for heat and dryness are being shattered, creating ...
Tech Xplore / Coal tailings could solve United States' need for rare earth elements
Rare earth elements are an easy-to-find, hard-to-refine resource critical for everything from magnets and electronics to batteries and catalysts for chemical reactions. Since the 1980s, a race has been on between the United ...
Phys.org / Replication efforts suggest 'smoking gun' evidence isn't enough to prove quantum computing claims
A group of scientists, including Sergey Frolov, professor of physics at the University of Pittsburgh, and co-authors from Minnesota and Grenoble have undertaken several replication studies centered around topological effects ...
