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כתבות אחרונות מאתר 'Phys'
Phys

Replicating bacterial DNA relies on accordion-like folds to separate, researchers discover‎

When bacteria cells replicate, they do so a little differently than human cells do. They don't undergo mitosis, a splitting that involves construction of spindles to carefully separate the DNA after replication. Instead, they use a process called binary fission, which is faster and allows them to separate their circular chromosomes as they are replicated. But the end result is the same: One cell turns into two cells, each with its own copy of the DNA chromosomes.

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Phys

'Plastic-eating' fusion enzyme improves polyester textile recycling‎

In a new study, scientists from the universities of Portsmouth and Manchester report that a specially engineered enzyme can significantly speed up the breakdown of PET—the plastic used in water bottles, food packaging and polyester clothing—when it is processed at high concentrations similar to those used in industry. The findings are published in the journal Bioresource Technology.

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Phys

Innovative recycling method can convert waste PET into high-quality raw materials and clean hydrogen‎

Despite polyethylene terephthalate (PET) being one of the most widely recycled plastics, only about 20% of used PET bottles are actually recovered as high-quality raw materials. The majority are transformed into lower-grade fibers or fillers before eventually being discarded. Addressing this gap, researchers at UNIST have developed a novel chemical recycling process that not only restores PET to its original high-grade form but also produces valuable chemicals and clean hydrogen, all under mild conditions.

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Phys

New 'atlas' for dendritic cells creates order in international nomenclature‎

For her Ph.D. at VUB and KULeuven, Aarushi Caro created a kind of systematics for dendritic cells, a special group of immune cells in the fight against cancer. Until now, there was a lot of confusion about the different types of dendritic cells. "Scientists worldwide use different names for similar cells, which makes it difficult to compare them," Caro explains. To address that problem, she used advanced techniques to map a comprehensive overview of dendritic cells in both mice and humans and across multiple cancer types.

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Phys

Chatting with people beats interactions with AI chatbots when it comes to reducing loneliness‎

More and more people are turning to AI chatbots as if they were close friends—venting about personal struggles, asking for advice, and even sharing their deepest secrets. These conversations can feel strikingly real, with some users saying they're indistinguishable from chatting with a human. However, while exchanges with AI can offer a quick emotional boost, it's still unclear whether they genuinely ease loneliness over time. In a new study published in the Journal of Experimental Social Psychology, researchers set out to ask a bigger question: can AI chatbots truly provide the kind of long-term emotional support we get from real human relationships?

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Phys

How AI‑supported storytelling helps adult learners understand environmental science‎

University of Phoenix announces the publication of "Harnessing AI, Virtual Landscapes, and Anthropomorphic Imaginaries to Enhance Environmental Science Education at Jökulsárlón Proglacial Lagoon, Iceland" in Glacies.

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Phys

Computer simulation of refugee journeys improves social understanding among students‎

Computer simulations can help people gain a better understanding of the situation faced by migrants. This is shown by a new study in which 148 teenagers were assigned random migration pathways, with different start and end points. Along the way, they encountered unforeseen events that affected their journey. Experiences from the game led to a partial shift in attitudes toward migration.

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Phys

NASA hauls its repaired moon rocket from the hangar back to the pad for an early April launch‎

For the second time this year, NASA moved its moon rocket from the hangar out toward the pad Friday in hopes of launching four astronauts on a lunar fly-around next month.

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Phys

New controls can stretch, blur and even reverse quantum time flow‎

In new research published in Physical Review X, scientists have designed quantum control protocols that generate processes more consistent with time flowing backward than forward. The protocols—techniques to control quantum systems—modify a quantum system's "arrow of time," the concept of time as moving in one forward direction. The work opens up possibilities for energy extraction from quantum systems and for quantum state preparation.

19:43
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Phys

Record-breaking heat wave grips western US‎

A record early heat wave striking the west of the United States on Friday is a one-in-500-years type event and all but certainly the result of human-caused climate change, experts say.

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