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1,619 articles from PhysOrg

How intricate patterns arise in developing tissues

Early development is like a carefully choreographed dance, with uniform swaths of cells arranging themselves into elaborate patterns—a first step toward the formation of functional organs. A flat layer of skin cells, for instance, must transition into one studded with neat arrays of hair cells and sweat glands.

Neuroscientists expand CRISPR toolkit with new, compact Cas7-11 enzyme

Last year, researchers at MIT's McGovern Institute for Brain Research discovered and characterized Cas7-11, the first CRISPR enzyme capable of making precise, guided cuts to strands of RNA without harming cells in the process. Now, working with collaborators at the University of Tokyo, the same team has revealed that Cas7-11 can be shrunk to a more compact version, making it an even more viable...

Transparency on demand: A novel process can render artificial materials transparent or even entirely invisible

Space, the final frontier. The starship Enterprise pursues its mission to explore the galaxy, when all communication channels are suddenly cut off by an impenetrable nebula. In many episodes of the iconic TV series, the valiant crew must "tech the tech" and "science the science" within just 45 minutes of airtime in order to facilitate their escape from this or a similar predicament before the end...

Researchers develop new method for the technological use of 2D nanomaterials

Nanosheets are finely structured two-dimensional materials and have great potential for innovation. They are fixed on top of each other in layered crystals, and must first be separated from each other so that they can be used, for example, to filter gas mixtures or for efficient gas barriers. A research team at the University of Bayreuth has now developed a gentle, environmentally-friendly process...

New study indicates how deep learning can improve gene therapies and antiviral drugs

The nuclease Cas13b associated with CRISPR defense systems—also known as genetic scissors—has the potential to be used in the future in hereditary diseases to silence adverse genes. In the fight against infections, it is also being researched as an antiviral agent, as Cas13b can target the genome of viruses and render them harmless. Despite these promising features, researchers are looking for...

Surprising new research finds women supporting women in business may backfire

Contrary to popular belief, well-intentioned calls for women to invest in women-owned businesses might be doing more harm than good in resolving the gender gap in venture financing. New research found in the INFORMS journal Organization Science finds that female-owned startups that get funding from female venture capitalists are two times less likely to get additional financing compared to those...

Electrochemical synthesis now possible without electric power source

Synthesis of organic compounds and polymers is at the core of many manufacturing industries. The new "electrifying synthesis" methods that can combine conventional synthetic chemistry with electrochemistry are a step closer to a sustainable tomorrow. These reactions don't require potentially harmful chemical reagents. They achieve organic synthesis by simply using electrons from an electric power...

Planetary defense exercise uses asteroid Apophis as hazardous asteroid stand-in

Watching the skies for large asteroids that could pose a hazard to Earth is a global endeavor. So, to test their operational readiness, the international planetary defense community will sometimes use a real asteroid's close approach as a mock encounter with a "new" potentially hazardous asteroid. The lessons learned could limit, or even prevent, global devastation should the scenario play out for...

Research confirms effectiveness of oil dispersants

Marine oil spills are one of the most direct, and harmful, examples of the toll that the extraction of fossil fuels can take on the environment. One of the few tools to mitigate that damage are chemical dispersants that break down oil in the water. However, scientists do not fully understand how well they work. A new study led by Bigelow Laboratory validated their efficacy under real-world...

Unique cremation site of the Late Bronze Age was left to the elements

A team of researchers affiliated with several institutions in Italy and one in the U.S. has found that a unique Bronze Age cremation site in modern Italy holds the remains of up to 172 people who were left to the elements. In their paper published on the open-access site PLOS ONE, the group describes their study of the bones and teeth they found at the cremation site and what they learned from...

Study uncovers how China's dams are operated along the Lancang-Mekong river

China's dams along the Upper Mekong, or Lancang, are often blamed as the main cause of recent droughts in the downstream regions. Yet, it is challenging to corroborate these claims, since China has not been releasing detailed data on how its big dams in the Lancang are operated. Using data from satellite images and high-resolution hydrological models, researchers have finally solved the enigma.

Science academies publish statements on primary concerns for international action ahead of the G7 summit

The science academies of the G7 states are calling for urgent international action to protect the ocean and polar regions and to accelerate decarbonization. In the healthcare sector, scientists demand increased global pandemic preparedness and the implementation of a One Health approach, which considers the health of humans, animals, plants and the wider environment as closely linked and...

Discovery of a tripole winter precipitation change pattern around the Tibetan Plateau in the late 1990s

The Tibetan Plateau (TP) is referred to as the "water tower" of Asia for being home to the headwaters of many major rivers in Asia, including the Yangtze, Yellow, Ganges, and Indus. Therefore, TP precipitation is important for not only local, but regional water resources too. On the other hand, the TP can strongly modulate the Asian climate through dynamic and thermal processes. Previous studies...

Ultrafine atmospheric dust from exhaust gases of fossil fuels might cause weather extremes

Strong precipitation or extreme drought—the frequency of extreme weather events is increasing worldwide. Existing climate models, however, do not adequately show their dynamics. Researchers of Karlsruhe Institute of Technology (KIT) assume that ultrafine particles in the atmosphere have a significant impact on cloud physics and, hence, on weather. Their aircraft measurements confirm an increase...