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כתבות אחרונות מאתר 'Phys'
Phys

How a pathogen turns flowers into leaves‎

Scientists have found how a protein produced by bacteria disrupts the mechanism that controls flower development in plants, turning reproductive organs into leaf-like structures. These findings shed light on a plant disease that is expected to spread as climate change expands the range of its insect vectors in northern latitudes. They used a synchrotron technique at ESRF, the European Synchrotron in Grenoble, France. The results are an Editor's Pick in the Journal of Biological Chemistry.

23:27
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Phys

Smart nanoparticles deliver antibiotics directly to H. pylori‎

Helicobacter pylori bacteria infect around half the global population and are a leading cause of stomach ulcers and gastric cancer. While antibiotics remain the standard treatment, they often fail to reach bacteria hidden beneath the stomach's protective mucus layer and deep within ulcer tissue. This often requires higher antibiotic doses, increasing the risk of adverse effects and antibiotic resistance.

23:27
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Phys

Adaptive crystal can selectively capture CO₂ and recognize similar molecules‎

Chemical separation can be energy-intensive when molecules have similar sizes and properties. Researchers from Shibaura Institute of Technology, Japan, have now developed an interlayer adaptive crystal that changes its spacing to recognize specific molecules.

23:04
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Phys

Magnets could help quantum computers talk to each other, says researcher‎

Xufeng Zhang is using magnets to make computers more power efficient at the quantum level. The Northeastern professor of electrical and computer engineering recently published two papers highlighting small-scale magnetic systems he and his team developed that could help make computers much more power efficient in the future.

23:04
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Phys

Home advantage or pastures new? High-Arctic shorebirds rarely return to the same breeding area‎

Shorebirds are capable of some of the longest migrations on Earth, yet most return year after year to the same area to breed. Coming back has distinct advantages, including knowing the best spots to feed or roost, having information about where predators lurk, and—hopefully—finding last year's partner again.

22:41
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Phys

Great Salt Lake's ancient past reveals how quickly fresh water can disappear‎

From a mountainside overlooking Utah's Great Salt Lake, a time traveler turning back the clock 20,000 years would watch a dramatic transformation of the landscape. The shallow, salty lake below would swell into an immense body of fresh water, at one point reaching nearly 1,000 feet (305 meters) deep and covering more than 10 times the lake's modern area. Mountain ranges would become islands, and the new shoreline would move far beyond its current boundary.

22:30
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Phys

New peanut genome map uncovers hidden gene, boosts dense-planting yields 20%‎

An international team that includes researchers from Murdoch University's Centre for Crop and Food Innovation (CCFI) has built the most comprehensive genetic map of the peanut yet and used this new genomic resource to breed a higher-yielding dwarf peanut line.

22:11
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Phys

Not all roads lead to Rome: Research challenges what we think we know about Roman roads‎

A multidisciplinary team of researchers from Aarhus University in Denmark, Queen Mary University of London and other European institutions analyzed a data set representing almost 300,000 kilometers (186,000 miles) of Roman roads across the former empire, creating the most detailed quantitative picture yet of how the Roman road network was structured.

22:04
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Phys

Drought-flood alternation under climate change‎

Climate change is increasing the frequency of both droughts and floods, meaning back-to-back extreme events are also on the rise. These rapidly alternating crises can harm people in complex ways. For example, back-to-back climate extremes can stress crops, reducing yields.

21:41
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Phys

Mitotic chromosomes may assemble from pre-existing chromatin 'building blocks' during cell division‎

Inside each human cell, about 2 meters (6.6 feet) of genomic DNA must be accurately copied and equally transmitted to two daughter cells during cell division. To achieve this, the copied DNA is condensed into thick, short structures called mitotic chromosomes. However, how chromatin is organized and condensed to form mitotic chromosomes has long remained a major question in genetics and cell biology.

21:41
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