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כתבות אחרונות מאתר 'Phys'
Phys

Adding 1,000 immigrants tied to 142 more health workers, fewer elderly deaths‎

New research finds the addition of a thousand new immigrants in a metropolitan area reduces elderly mortality by about 10 deaths than would be typical. Why? Because among the newcomers are foreign-born health care workers who are arriving amid a critical nationwide shortage, according to the study's authors, who hail from Harvard Medical School, the Massachusetts Institute of Technology, and the University of Rochester.

01:52
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Phys

Drought spurs rise in antibiotic-resistant soil microbes‎

A new Caltech study indicates that drought increases the abundances of antibiotic-resistant microorganisms in soils, which directly correlates with an increase in antibiotic-resistant infections in hospitals. In other words, regions experiencing high aridity—hotter, drier regions—also experience higher levels of antibiotic-resistant infections. The work demonstrates the interconnectedness of climate, environment, and human health.

01:52
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Phys

Male bats sing in the rotor-swept zone of wind turbines, potentially raising collision risk‎

A research team led by the Museum für Naturkunde presents the first evidence that several bat species produce courtship songs in the immediate rotor-swept zone of wind turbines while circling around the nacelle. Data from over 80,000 audio recordings at nacelle height from six German sites, together with stereo-thermal 3D reconstructions of bat flight trajectories, document both bat song and elevated bat density in the rotor-swept zone. Both lines of evidence suggest that, under certain circumstances, bats actively approach wind turbines and provide an explanation for why collision risk may increase during the mating season.

01:52
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Phys

Biosensor detects early fungal outbreaks, advances plant biotechnology‎

A new biosensor developed at the Department of Energy's Oak Ridge National Laboratory detects the emerging presence of fungus on plants at the molecular level, paving the way for next-generation crop protection and the development of stress-tolerant plants. The innovation advances technology for the U.S. agricultural and biomanufacturing sectors.

01:52
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Phys

Shift in key cosmic inflation measurement could be a statistical artifact‎

For the last few decades, researchers have been studying what the universe looked like in its first seconds. It is generally accepted that the universe expanded exponentially in the first fraction of a second after the Big Bang. Researchers use ns, the scalar spectral index, to characterize how primordial density fluctuations were distributed across different length scales in the early universe. The value of ns is a central observable in inflationary cosmology, since different inflationary scenarios predict distinct values for this quantity, making it a powerful discriminator between models.

01:52
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Phys

Euthanasia rates for stray dogs triple as more animals enter UK shelters‎

A stark rise in the number of stray dogs being euthanized across the UK and the Republic of Ireland, with rates more than tripling over a three-year period, are revealed in a new collaborative study. The research is published in Animals.

00:42
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Phys

Gran Dolina site at Atapuerca reveals almost exclusive use of local chert 400,000 years ago‎

A paper published in the journal Quaternary International reveals a distinctive technological behavior at level TD10.2-BB of Gran Dolina (Atapuerca, Burgos), characterized by the almost exclusive use of local chert and linked to one of the earliest pieces of evidence of communal hunting in the human evolutionary record, dated to around 400,000 years ago.

00:42
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Phys

New findings on the first steps in protein synthesis‎

In the earliest phase of creating human proteins, the protein complex NAC performs an essential task by starting the first steps toward folding proteins into their correct three-dimensional structures. An international research team led by scientists from the Center for Molecular Biology of Heidelberg University has found that the NAC complex binds to the nascent protein building blocks formed by the ribosome, i.e., the amino acid chains, and initiates the folding that is essential for functional proteins.

00:42
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Phys

Single-cell sequencing reveals unexpected protist diversity‎

Researchers from the Earlham Institute, in collaboration with the Department of Biology at the University of Oxford, have discovered three previously unrecognized lineages of the protist Bodo, each with its own bacterial endosymbiont (a symbiotic organism living within the body of its host).

00:42
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Phys

Why cultivating drought-resistant plants disappoints: Soil physics may be the real bottleneck‎

Plants need water, light, and air to thrive. But when they transport water from the soil up to their leaves, they defy gravity. Scientists describe this astonishing phenomenon as "negative water potential," a form of negative tension that enables herbs, shrubs, and trees to draw water from the soil. Nevertheless, plants do not constantly extract water from the soil. For decades, researchers have sought to understand what limits a plant's water uptake.

00:42
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