ניווט נגישות
כתבות אחרונות מאתר 'Phys'
Phys

The Big Bee Project brings natural history collections into the 21st century‎

Museum collections have underpinned scientific research for centuries. But physical specimens in boxes and drawers don't easily lend themselves to the research techniques of the new millennium. "How can we apply these techniques to natural history collections, especially when much of the intrinsic information a specimen has to offer is difficult to quantify?" asks Katja Seltmann, director of UC Santa Barbara's Cheadle Center for Biodiversity & Ecological Restoration. Enter the Big Bee Project: a pioneering initiative to bring natural history collections into the century of AI, big data and networked databases.

23:58
תפריט כתבה
Phys

New technique reveals body-wide cellular processes‎

Understanding gene expression within the body has been a boon for 21st century biology and therapeutics, but most discoveries that use these technologies only focus on one organ or one small area of tissue. At the University of Chicago's Pritzker School of Molecular Engineering (UChicago PME), Assoc. Prof. Nicolas Chevrier's group has developed a new system to understand how diseases affect molecules, cells, tissues, and organs across the whole body—a major goal of both scientists and physicians. The interdisciplinary work was led by Maggie Clevenger, a staff scientist in the lab, and involved several industrial and academic collaborators.

23:03
תפריט כתבה
Phys

Some ticks can survive from 1 to 3 weeks on home flooring‎

It's fairly common for members of the public to ask bug experts if ticks that hitchhike into a house on people or dogs can actually survive indoors for any length of time. A new study provides the first scientific evidence that the answer is yes, showing that two species of ticks can live at least one week, and up to about three weeks, on hard-surface and carpeted floors.

22:31
תפריט כתבה
Phys

How lifetime stress drives abnormal behaviors in lab monkeys‎

It is not unusual for laboratory monkeys to engage in abnormal repetitive behaviors (ARBs), such as pacing and hair-plucking. Conventional thinking is that these actions are linked to recent stresses or current housing conditions. But a new study published in the journal Biology Letters suggests the causes are often cumulative negative experiences that build up over an animal's entire life.

22:03
תפריט כתבה
Phys

Physicists create laser tornado in miniature structures using synthetic magnetic field‎

Can light behave like a whirlwind? It turns out it can—and such "optical tornadoes" have now been created in an extremely small structure by scientists from the Faculty of Physics at the University of Warsaw, the Military University of Technology, and the Institut Pascal CNRS at Université Clermont Auvergne. This discovery opens a new pathway for creating miniature light sources with complex structures, potentially enabling the development of simpler and more scalable photonic devices in the future, for applications such as optical communication and quantum technologies. The research is published in the journal Science Advances.

21:51
תפריט כתבה
Phys

Microwave carrots, air-fry tomatoes: Researchers identify sustainable cooking methods for better nutrition‎

Researchers at the University of Seville's Food Color and Quality Laboratory have studied the effects of different cooking methods used for tomatoes and carrots (in the oven, microwave or air fryer, among others) on the amount of carotenoids that are potentially available for absorption by the body following the digestion of these foods. According to the study, the bioavailability index varies significantly depending on how these foods are cooked. Carotenoids are compounds of great importance due to their positive health effects.

21:28
תפריט כתבה
Phys

Understanding protein motion could greatly aid new drug design‎

For many people, "protein" is the key element of a food order. However, beyond the preferred choice of meats or plant-based alternatives, proteins encompass a large class of complex biomolecules whose chemical structure is encoded in our genes. Proteins have critical functions in living cells; they help repair and build body tissues, drive metabolic reactions, maintain pH and fluid balance, and keep our immune systems strong.

21:03
תפריט כתבה
Phys

Trade-offs between commercial and public satellite data in water mapping accuracy revealed‎

A new study finds that commercial satellite imagery data often outperforms public data sets when identifying surface water, but that public data sets may be better at detecting water hidden by forest cover. Satellite imagery is a powerful tool for mapping surface water, from the movement of rivers and streams to water levels and even water temperatures. The effectiveness of those satellites depends on their ability to identify water in the images they capture.

20:46
תפריט כתבה
Phys

He suddenly couldn't speak in space. NASA astronaut says his medical scare remains a mystery‎

The astronaut who prompted NASA's first medical evacuation earlier this year said Friday that doctors still don't know why he suddenly fell sick at the International Space Station.

20:46
תפריט כתבה
Phys

JWST solves decades-long mystery about why Saturn appears to change its spin‎

Researchers at Northumbria University have used the most powerful space telescope ever built to answer one of the longest-standing puzzles in planetary science—why does Saturn appear to spin at a different speed depending on how you measure it? The findings, published in the Journal of Geophysical Research: Space Physics, reveal for the first time the complex patterns of heat and electrically charged particles in Saturn's aurora, and show that the entire system is driven by a self-sustaining feedback loop powered by the planet's own northern lights.

20:21
תפריט כתבה
דיווח על כתבה זו הסתרת כתבות מאתר זה המשך קריאה באתר המקור