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כתבות אחרונות מאתר 'Phys'
Phys

Genome tool places large genetic sequences precisely in rice and tobacco without DNA breaks‎

Researchers at King Abdullah University of Science and Technology (KAUST) have developed a new way to add large pieces of genetic information to plants, overcoming a challenge that has limited plant biotechnology for decades. The advance could help scientists build more complex traits into plants in the future, supporting research into areas such as crop resilience, sustainable agriculture, biotechnology and the use of plants as scalable platforms for producing therapeutics and biologics.

02:42
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Phys

A longer, hotter reality surrounds marine heat waves, research reveals‎

Anyone who has boiled a pot of water understands that it takes both time and energy to raise the temperature, so it may come as a surprise to learn that scientists have long treated marine heat waves (MHWs) as isolated events. New research led by William & Mary's VIMS & Batten School is challenging that narrative by providing a framework to characterize an ecosystem's cumulative heat exposure from MHWs and the extended periods of warm water that precede and follow them.

02:25
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Phys

Marine animals first colonized empty seashells about 470 million years ago‎

An international study led by researchers from the University of Tartu shows that approximately 470 million years ago, a significant ecological change took place in the world's oceans: For the first time, the interiors of empty mollusk shells began to be used as habitats. This marked the emergence of a new ecological niche and was a crucial step in the development of a marine ecosystem similar to today's.

02:09
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Phys

Quantum internet leaves the lab with first real-world entanglement over busy telecom fiber‎

Quantum information is notoriously fragile. Internet traffic is anything but. Yet Northwestern University scientists have demonstrated they can peacefully coexist inside the same fiber-optic cable.

01:53
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Phys

Light-driven chemistry method could create antiviral compound libraries 10 to 100 times larger within weeks‎

As the world faces new and often untreatable viral threats, Simon Fraser University researchers have found a way to cut years off the time it takes to discover antiviral drugs. The new research enables scientists to quickly create large libraries of nucleoside analogs (NAs), compounds that mimic the building blocks of DNA and RNA and are widely used to treat cancer and viral infections such as HIV and hepatitis.

01:25
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Phys

Water-surface vortices drive tiny rotors without electricity, magnets or chemicals‎

Reliably generating controlled miniature rotations has long been a challenge: Chemical propulsion systems wear out, and methods that use electric or magnetic fields require complex setups. A team from KIT's Institute of Microstructure Technology (IMT) and the Suzhou Institute of Nano-tech and Nano-bionics (SINANO) at the Chinese Academy of Sciences has now demonstrated that flow at a water surface alone is sufficient to rotate a floating object in a fixed direction. Their research is published in the journal Science Advances.

01:01
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Phys

Even a slight overproduction of tubulin can tip the balance of cellular health, study shows‎

For cells to function properly, they must produce the right amount of each protein. It is a delicate balance: Both too little and too much can compromise essential cellular functions. A team from the University of Geneva (UNIGE) has now shown that even a modest excess of tubulin—the protein that assembles into microtubules, the cell's internal scaffolding—is enough to disrupt tissue architecture and reduce cell viability. Published in Nature Communications, the study demonstrates that the quantity of a protein is just as important as its function.

00:41
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Phys

Reusable magnetic invention removes microplastics plus some PFAS from water‎

Microplastics are an increasing global concern, with growing evidence of their presence in water systems. RMIT University researchers have developed a water treatment material that rapidly removes micro- and nanoplastics and some PFAS (per- and polyfluoroalkyl substances), bringing the technology closer to real-world use. The invention builds on the team's 2022 breakthrough in microplastics removal, extending its performance to much smaller particles and more complex wastewater.

00:26
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Phys

Plasma design rules show how to preserve attosecond flashes for observing electrons‎

Researchers at Skoltech, together with a colleague from the Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences, working within the joint SIOM–Skoltech laboratory, have determined how to select the thickness and density of a plasma target so that a pulse passing through it retains its attosecond duration and high intensity. The results will help improve the design of plasma-based sources of ultraviolet and X-ray radiation used to study ultrafast processes in matter.

00:06
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Phys

Shifting weather patterns drive 55% of Europe's summer drought trend, study finds‎

In a new study, researchers at Leipzig University have identified a major cause of the unusually severe summer soil drying and rising temperatures across Europe. They found that much of the trend can be attributed to changes in atmospheric circulation patterns—that is, shifts in the weather regimes that typically occur over Europe. These changes account for around 55% of the observed summer drought trend. Specifically, more frequent and persistent high-pressure systems have brought drier conditions and reduced rainfall.

00:06
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