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251,533 articles from PhysOrg

Researchers report finding first bidirectional color-changing flower variety

We all like flowers, and one of the most appealing things about flowers is presumably the wide array of shapes, sizes, and of course, colors in which they come. But did you know that some flowers can change their colors? Although it's not all flowers, this trait has been observed in hundreds of different species for at least a number of decades.

Scientists produce nanobodies in plant cells that block emerging pathogens

Scientists at the U.S. Department of Agriculture's (USDA) Agricultural Research Service (ARS) recently announced that plants could be used to produce nanobodies that quickly block emerging pathogens in human medicine and agriculture. These nanobodies represent a promising new way to treat viral diseases, including SARS-CoV-2.

Study illuminates molecules aiding communication inside cells

New research from the Lippincott-Schwartz Lab at HHMI's Janelia Research Campus being presented at Cell Bio 2022 provides a close-up look at the individual molecules that facilitate communication between cellular structures. The new research, which is also posted as a preprint on bioRxiv, shows that these molecular tethers are much more dynamic and complex than previously thought, revealing new...


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Fear of professional backlash may keep women from speaking up at academic conferences

Academic conferences provide invaluable opportunities for researchers to present their work and receive feedback from attendees during question-and-answer sessions. Women are less likely to ask questions during these sessions, however, and research in Psychological Science suggests that this may be due to anxiety about how colleagues will receive their comments.

Researchers demonstrate light-induced locomotion in a nonliquid environment and report a new type of liquid-like motion

Motion is everywhere in living systems and is necessary for mechanical functions in artificial systems, such as robots and machines. Functional mechanical structures that can change volume and shape in response to external stimuli (such as light, heat, electricity, humidity, and chemistry) have a wide range of application prospects in the field of biomechanics and bionic robots. They have...

Researchers build powerful model for discovering new drugs

Researchers have developed a new computer framework that holds promise in the work to discover new drugs. Their framework uses an artificial intelligence method called a convolutional neural network to provide global information about potential novel drug candidates.

Steep fall in implementation of physical activity policy in Ontario schools

Children have become less physically active in school, despite teachers recognizing the importance of daily movement. Now, a new study published in BMC Public Health reveals the implementation of Ontario's Daily Physical Activity (DPA) policy is in sharp decline. The reasons, according to the study, include time constraints and low confidence among teachers about their ability to implement the...

Individuals' cognitive transformations key to understanding desistance from crime, argues expert

Much of U.S. criminal justice policy focuses on recidivism, and probation and parole violators make up a considerable share of jail and prison populations. In a new article, a 2022 winner of the Stockholm Prize in Criminology argues that to understand desistance—the process of reducing or ending criminal behavior—we must consider the role of individuals' cognitive transformations.

Physicists produce symmetry-protected Majorana edge modes on quantum computer

Physicists at Google Quantum AI have used their quantum computer to study a type of effective particle that is more resilient to environmental disturbances that can degrade quantum calculations. These effective particles, known as Majorana edge modes, form as a result of a collective excitation of multiple individual particles, like ocean waves form from the collective motions of water molecules....

Machine-learning model instantly predicts polymer properties

Hundreds of millions of tons of polymer materials are produced globally for use in a vast and ever-growing application space with new material demands such as green chemistry polymers, consumer packaging, adhesives, automotive components, fabrics and solar cells.

Exploring nanodiamonds that can be activated as photocatalysts with sunlight

Nanodiamond materials have great potential as catalysts. Inexpensive nanoparticles made of carbon provide very large surfaces compared to their volume. However, to catalytically accelerate chemical reactions in an aqueous medium, electrons from the catalyst need to go into solvation and in pure diamond materials this requires high-energy UV light for excitation. On the other hand, the extremely...

New monochromator optics for tender X-rays

A climate-neutral energy supply requires a wide variety of materials for energy conversion processes, for example catalytically active materials and new electrodes for batteries. Many of these materials have nanostructures that increase their functionality. When investigating these samples, spectroscopic measurements to detect the chemical properties are ideally combined with X-ray imaging with...

'Digital footprints' central to new approach for studying post-disturbance recreation changes

The Columbia River Gorge is a crown jewel for recreation in the Pacific Northwest, stretching more than 80 miles along the borders of Washington and Oregon and providing a wide variety of trails, campgrounds, waterfalls, and wilderness areas for recreational use. In 2017, the western portion of the area was burned by the Eagle Creek Fire, a human-caused, wind-driven blaze that ultimately burned...

Findings from 2,000-year-old Uluburun shipwreck reveal complex trade network

More than 2,000 years before the Titanic sunk in the North Atlantic Ocean, another famous ship wrecked in the Mediterranean Sea off the eastern shores of Uluburun—in present-day Turkey— carrying tons of rare metal. Since its discovery in 1982, scientists have been studying the contents of the Uluburun shipwreck to gain a better understanding of the people and political organizations that...

Smallest mobile lifeform created

The origin of all biological movements, including walking, swimming, or flying, can be traced back to cellular movements; however, little is known about how cell motility arose in evolution.

Scientists discover a new mechanism to generate cartilage cells

As any weekend warrior understands, cartilage injuries to joints such as knees, shoulders, and hips can prove extremely painful and debilitating. In addition, conditions that cause cartilage degeneration, like arthritis and temporomandibular joint disorder (TMJ), affect 350 million people in the world and cost the U.S. public health system more than $303 billion every year. Patients suffering from...

Gaining more control over plasma accelerators by combining acceleration methods

If one particle accelerator alone is not enough to achieve the desired result, why not combine two accelerators? An international team led by physicists at the Center for Advanced Laser Applications (CALA) at LMU Munich has implemented this idea. It combined two plasma-based acceleration methods for electrons, namely a laser-driven wakefield accelerator (LWFA) with a particle-beam-driven wakefield...