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כתבות אחרונות מאתר 'Phys'
Phys

Chang'e-6 samples reveal first evidence of impact-formed hematite and maghemite on the moon‎

A joint research team from the Institute of Geochemistry of the Chinese Academy of Sciences (IGCAS) and Shandong University has for the first time identified crystalline hematite (α-Fe2O3) and maghemite (γ-Fe2O3) formed by a major impact event in lunar soil samples retrieved by China's Chang'e-6 mission from the South Pole–Aitken (SPA) Basin. This finding, published in Science Advances on November 14, provides direct sample-based evidence of highly oxidized materials on the lunar surface.

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Phys

Electrical control of spin currents in graphene via ferroelectric switching achieved‎

A collaborative European research team led by physicists from Slovak Academy of Sciences has theorized a new approach to control spin currents in graphene by coupling it to a ferroelectric In2Se3 monolayer. Using first-principles and tight-binding simulations, the researcher showed that the ferroelectric switching of In2Se3 can reverse the direction of the spin current in graphene acting as an electrical spin switch. This discovery offers a novel pathway toward energy-efficient, nonvolatile, and magnet-free spintronic devices, marking a key step toward the fabrication of next-generation spin-based logic and memory systems to control spin textures.

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Phys

Rediscovery of lost fish species provides a second chance for conservation‎

Researchers have announced the rediscovery of Moema claudiae, a species of seasonal killifish in Bolivia that was previously thought to be possibly extinct. This rediscovery provides new hope for the conservation of this unique fish and the diverse wetland habitats of the region.

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Phys

Bacterial enzyme uses vitamin C to neutralize immune defenses, study finds‎

Throughout evolution, pathogenic microorganisms, such as bacteria, viruses, and fungi, have developed sophisticated defense strategies to survive and multiply in the hostile environment of their hosts. These mechanisms increase their virulence and make infections more difficult to fight. One of the most effective strategies is the neutralization of oxidants released by defense cells to eliminate invaders.

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Phys

Ethics should lead, not play catch-up, expert emphasizes as Japan panel OKs making human embryos from stem cells‎

A leading bioethicist at Hiroshima University is calling for an anticipatory, rather than reactive, approach to ethics after a Japanese government panel in August backed a report that brings the country a step closer to becoming the first in the world to allow research on human embryos created from stem cell–derived sperm and eggs.

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Phys

Baby sea otter is reunited with mother in central California after dramatic rescue‎

It was a foggy October afternoon on the central California coast when the Marine Mammal Center got a call on their public hotline: there were distressed cries coming from the frigid waters in Morro Bay.

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Phys

Satellites play critical role in tracking climate adaptation, researchers say‎

Satellite-based Earth observation provides a unique and powerful tool in tracking climate adaptation, an international study involving University of Galway researchers has shown.

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Phys

Global review identifies 57 new living species of tiny marine foraminifera‎

A global review of tiny sea animals called foraminifera has identified 57 new living species, including three from NZ waters. The NZ-led research team used DNA sequencing and physical structure to describe types of foraminifera living in the seafloor sediments of coastal and shallow offshore areas. The paper is published in the journal Micropaleontology.

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Phys

Catalyst turns methane into bioactive compounds for the first time‎

Natural gas—one of the planet's most abundant energy sources—is primarily composed of methane, ethane, and propane. While it is widely burned for energy, producing greenhouse gas emissions, scientists and industries have long sought ways to directly convert these hydrocarbons into valuable chemicals. However, their extreme stability and low reactivity have posed a formidable challenge, limiting their use as sustainable feedstocks for the chemical industry.

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Phys

Fighting poverty may require cultural wisdom, not just cash‎

Most poverty-fighting efforts focus on meeting basic material needs, such as food and shelter. But this overlooks the psychological and cultural factors that shape how people take action in their lives.

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