ניווט נגישות
כתבות אחרונות מאתר 'Phys'
Phys

Fluorescence imaging technique reveals hidden magnetic chemistry in living systems‎

A research team at the University of Tokyo has developed a new microscopy platform that can observe a previously hidden layer of biomolecular chemistry linked to weak magnetic fields. The work, led by Project Researcher Noboru Ikeya and Professor Jonathan R. Woodward at the Graduate School of Arts and Sciences, addresses a long-standing technical gap in life-science measurement: Many important intermediates in spin-dependent reactions are "dark" molecules that do not emit light directly and therefore escape conventional fluorescence imaging.

00:54
תפריט כתבה
Phys

Experiments refute dark matter claim‎

The doctoral thesis of Sophia Hollick, Ph.D. '25, a recent graduate of Yale's Wright Lab in professor Reina Maruyama's group, has significantly contributed to answering a decades-long question in her field about whether or not a signal observed in an experiment that has taken data since 1997 was indicative of a direct detection of dark matter. The results of her analysis, which have excluded the dark matter explanation with greater confidence, were published in Physics Review Letters in the article "Combined Annual Modulation Dark Matter Search with COSINE-100 and ANAIS-112."

00:45
תפריט כתבה
Phys

Cell 'snowball' may be answer to large-scale tissue engineering‎

Cell cultures—single layers of cells grown in a small dish—have enabled researchers to study biological growth, develop or test drugs and even discover what causes some diseases. Cell spheroids, 3D versions of cell cultures built using a process known as cell aggregation, are the next step in advancing this work, capable of more closely modeling real tissue. A new technology, invented by researchers from Penn State and detailed in a paper published in Advanced Science, could breathe fresh air into bottom-up tissue fabrication and potentially large-scale tissue engineering by addressing these issues.

00:37
תפריט כתבה
Phys

New plan aims to track microplastics in U.S. drinking water, EPA says‎

U.S. officials are taking a closer look at what's in America's drinking water, including microplastics and leftover medications.

00:25
תפריט כתבה
Phys

'Switch' behind flash drought in Puerto Rico uncovered‎

In Puerto Rico, drought doesn't always arrive slowly. Sometimes, it appears in days. That speed can leave producers scrambling, reservoirs dropping, and communities facing water restrictions before they can react. In a place often associated with heavy rain and hurricanes, drought is often overlooked, but very much a reality. New research from Virginia Tech is helping explain why.

00:25
תפריט כתבה
Phys

Stitching precise patterns—with lasers‎

Just as embroiderers, with needle and thread, can transform plain fabric into an intricate pattern, engineers can use lasers and polymers to create flexible, complex structures that could transform life-saving sensing technology. An interdisciplinary team at the University of Pittsburgh's Swanson School of Engineering has developed a new manufacturing strategy that reveals where and how laser-induced graphene (LIG) forms on polymers.

00:14
תפריט כתבה
Phys

More dives, fewer reef sharks: Caribbean study links tourism pressure to shark sightings‎

Reef sharks are observed less frequently on Caribbean reefs that have high levels of diving activity and greater coastal development, according to new research published in the Journal of Applied Ecology. Even recreational activities that are often considered low impact are associated with fewer sharks on these reefs. Reef sharks play an important role in maintaining healthy reefs by helping to keep the ecosystem in balance.

00:04
תפריט כתבה
Phys

Body size, lifespan and mobility can help predict which species are most threatened as planet changes‎

How can we predict species' responses to always-arising changes in our world? A long-term ecological study from Yokohama National University researchers suggests the answer may lie in a few small simple biological traits. Their findings offer a framework for better anticipating biodiversity change and improving proactive conservation strategies. The results were published in Nature Communications on March 14.

23:55
תפריט כתבה
Phys

Parasitic tapeworm—a risk to domestic dogs and humans—found in Washington coyotes‎

New evidence suggests that a disease-causing tapeworm that has been spreading across the United States and Canada has arrived in the Pacific Northwest. The tapeworm, called Echinococcus multilocularis, lives as a parasite in coyotes, foxes and other canid species and can cause severe disease if passed to domestic dogs or humans.

23:42
תפריט כתבה
Phys

Bacteria are weaving forever chemicals directly into their cell membranes, study finds‎

University of Tennessee Knoxville professor and Goodrich Chair of Excellence in Civil Engineering Frank Loeffler and his co-authors published new research on the environmental impacts of "forever chemicals" in Nature Microbiology. Their study uncovered that bacteria incorporate polyfluoroalkyl carboxylates—a type of per- and polyfluoroalkyl substances (PFAS)—into the molecules that make up their cell membranes.

23:36
תפריט כתבה
דיווח על כתבה זו הסתרת כתבות מאתר זה המשך קריאה באתר המקור