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כתבות אחרונות מאתר 'Phys'
Phys

Upconversion materials: A new frontier in solar water-splitting‎

Solar water splitting is one of the most direct ways to produce green hydrogen using sunlight. However, most photocatalysts and photoelectrodes absorb only a limited portion of solar radiation, mainly ultraviolet and part of the visible spectrum. A large share of solar energy, particularly infrared photons, remains unused. This spectral mismatch significantly limits the efficiency of hydrogen production from sunlight.

05:26
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Phys

Elephants avoid humans far more than baboons, waterbucks or antelopes‎

Wild animal species respond very differently to human development, and as a result, they use ecological corridors in agricultural and urban areas in distinct ways. This emerges from research in Botswana by ecologist Marlee Tucker of Radboud University published in Integrative Conservation.

03:55
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Phys

Soybeans recruit beneficial soil microbes to defend against a major pest‎

Soybean cyst nematode (SCN) is among the most damaging pests affecting soybean crops around the world, with current management strategies relying primarily on a very narrow set of resistant soybean varieties, along with crop rotation and chemical nematicides. Now, researchers at the North Central Agricultural Research Laboratory, part of the USDA Agricultural Research Service, in Brookings, South Dakota, report new evidence that the key to stronger protection may lie not just in plant genetics or chemicals but in the soil microorganisms surrounding the roots.

03:55
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Phys

Toxic evolution: How wasps and frogs mimic pain molecules to deter predators‎

Certain species of wasps and frogs share a pain and inflammation peptide similar to one found in vertebrates to help defend against predators—a discovery that contributes to a shifting view of how evolution works, say researchers. Their paper is published in the journal Science.

03:55
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Phys

Engineers improve infrared devices using century-old materials‎

After decades of intense research, surprises in the realm of semiconductors—materials used in microchips to control electrical currents—are few and far between. But with a pair of published papers, materials engineers at Stanford University debut a promising approach to using a well-studied semiconductor to improve infrared light-emitting diodes and sensors. They say the approach could lead to smaller, sleeker, and less expensive infrared technologies for environmental, medical, and industrial uses.

02:32
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Phys

Tracking the toxic metals left behind by wildfires‎

Between 2023 and 2025, more than 30 million hectares burned in Canada due to wildfires. The threat from increasingly frequent and intense wildfires goes beyond fire and smoke—the heat can also transform naturally occurring metals in soil into more toxic forms that could pose a threat to human health.

02:32
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Phys

New research warns charities against 'AI shortcut' to empathy‎

A new report from the University of East Anglia (UEA) warns that the potential reputational damage of charities using AI-generated images in their campaigns is more complex than many organizations realize. It comes as humanitarian budgets tighten and production pressures increase, with many charities and NGOs turning to AI tempted by the offers of speed, cost efficiency and creative flexibility.

02:32
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Phys

Plant cell structure could hold key to cancer therapies and improved crops‎

Can the bend of a banana give us insight into cancer? What does the shape of a rice grain have to do with infertility? The proteins that give plants their shape and structure are also involved in human disease. A team led by researchers at the University of California, Davis, has mapped out the structure of a key player, augmin, in exhaustive detail. Their work is published in the journal Nature Communications.

02:32
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Phys

AI-designed diffractive optical processors pave the way for low-power structural health monitoring‎

A team of researchers at the University of California, Los Angeles (UCLA) has introduced a novel framework for monitoring structural vibrations using diffractive optical processors. This new technology uses artificial intelligence to co-optimize a passive diffractive layer and a shallow neural network, allowing the system to encode time-varying mechanical vibrations into distinct spatiotemporal optical patterns.

02:32
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Phys

Amazon fish contaminated with toxic metals threaten riverine communities' health‎

For riverside communities along the Amazon, fish is not a menu choice—it is a lifeline. Millions of people in the Brazilian Amazon depend on fish as their primary source of protein, consuming it daily in quantities far above the national average. When we began fieldwork across five municipalities in western Pará, we knew this reality well. What the data then showed us was that this dietary dependence comes with a health cost that standard food safety frameworks are not designed to capture.

02:32
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