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כתבות אחרונות מאתר 'Phys'
Phys

Fossil amber reveals the secret lives of Cretaceous ants‎

Tiny insects trapped in amber could tell us a great deal about their roles in past ecosystems: pollinators, parasites, predators, and prey. But how many of the insects preserved alongside each other reflect interactions during life, and how many are just unlucky coincidences?

08:06
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Phys

Using high-energy sparks to degrade pollutants without generating waste‎

A study published in the Chemical Engineering Journal proposes a new approach to environmental remediation of pharmaceutical pollutants in water flows. This approach is based on a phenomenon known as "sparks," which refers to the sparks that appear on the surface of a metal when it is subjected to plasma electrolytic oxidation (PEO).

03:34
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Phys

Study of 40,000 cases links Somalia migration mainly to water scarcity‎

A study published in Nature Food by researchers from the Politecnico di Milano and the University of California at Berkeley provides forward-thinking answers to the debate on the role of environmental stresses on migration processes. The analysis, conducted on a dataset of 40,000 cases of environmental migration in Somalia and led by Professor Maria Cristina Rulli, coordinator of the Glob3ScienCE (Global Studies on Sustainable Security in a Changing Environment) Lab, shows that the main reasons for these displacements can be attributed to water scarcity. Drought, the insufficient water content of the soil with respect to the needs of agriculture, and food insecurity caused as a result, directly affect Somalia's agricultural and pastoral communities, which represent about 80% of the national population.

03:34
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Phys

Green turtle nests may bury 'plastic rocks' and endanger the species‎

Even the most remote regions of the globe are not free from plastic pollution. In a study published in Marine Pollution Bulletin, researchers from São Paulo State University (UNESP) in Brazil have detected plastic rocks on Trindade Island, the easternmost point of South America.

02:17
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Phys

Carbon-based catalyst can use sunlight to degrade PFAS‎

An international team of scientists led by the University of Bath has developed a new catalyst—a substance that speeds up chemical reactions—that uses sunlight to break down so-called "forever chemicals" prevalent in the environment and known to accumulate in the human body with unknown long-term health effects.

02:17
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Phys

New technique spots hidden defects to boost reliability of ultrathin electronics‎

Future devices will continue to probe the frontier of the very small, and at scales where functionality depends on mere atoms, even the tiniest flaw matters. Researchers at Rice University have shown that hard-to-spot defects in a widely used two-dimensional insulator can trap electrical charges and locally weaken the material, making it more likely to fail at lower voltages. The findings are published in Nano Letters.

02:17
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Phys

Mitochondria can reshape lipid storage in cells by repurposing a protein-insertion complex‎

A recent study by the University of Bonn and University Hospital Bonn and the University of Freiburg shows that the mitochondria appear to be able to influence the number of lipid droplets in the cell using a mechanism that is actually intended for a completely different purpose. Their results have now been published in the journal Nature Cell Biology.

02:17
תפריט כתבה
Phys

Undergrads expand the chemical toolbox for cancer drugs‎

Thanks to modern therapies, a cancer diagnosis is no longer an automatic death sentence. But many patients still suffer from unwanted side effects and limited efficacy. In a recent Bioconjugate Chemistry publication, William & Mary researchers have designed an antibody-drug conjugate (ADC) with the potential to improve the potency and decrease the cost of currently approved cancer drugs.

02:17
תפריט כתבה
Phys

Neanderthal males, human females? How ancient attraction shaped the human genome‎

The human genome is a rich, complex record of migration, encounters, and inheritance written over thousands of millennia. Genomic research by members of Sarah Tishkoff's lab at the University of Pennsylvania are revisiting a particularly intimate chapter, suggesting that ancient mating patterns between modern humans and Neanderthals shaped why Neanderthal DNA is largely missing from the human X chromosome.

02:17
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Phys

Matching vibrations is all it takes to shut down superconductivity in a nearby crystal‎

The world is never really at rest. Even in a vacuum near ultracold temperatures where all classical motion should come to a halt, you'll find quantum fluctuations. In thin, two-dimensional materials, these include random vibrations that can alter electromagnetic fields, a feature that theorists have posited could be quite useful for modifying materials.

02:17
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