783,833 articles

Bringing atoms to a standstill: Researchers miniaturize laser cooling

It's cool to be small. Scientists at the National Institute of Standards and Technology (NIST) have miniaturized the optical components required to cool atoms down to a few thousandths of a degree above absolute zero, the first step in employing them on microchips to drive a new generation of super-accurate atomic clocks, enable navigation without GPS, and simulate quantum systems.

Advances in modeling and sensors can help farmers and insurers manage risk

When drought caused devastating crop losses in Malawi in 2015-2016, farmers in the southeastern African nation did not initially fear for the worst: the government had purchased insurance for such a calamity. But millions of farmers remained unpaid for months because the insurer's model failed to detect the extent of the losses, and a subsequent model audit moved slowly. Quicker payments would...

Nature's decline risks our quality of life

It is no secret that over the last few decades, humans have changed nature at an ever-increasing rate. A growing collection of research covers the many ways this is impacting our quality of life, from air quality to nutrition and income. To better understand how which areas are most at risk, scientists have combed through volumes of literature to present global trends in the relationship between...

A cascaded dual deformable phase plate wavefront modulator enables direct AO integration with existing microscopes

Microscopy is the workhorse of contemporary life science research, enabling morphological and chemical inspection of living tissue with ever-increasing spatial and temporal resolution. Even though modern microscopes are genuine marvels of engineering, minute deviations from ideal imaging conditions will still lead to optical aberrations that rapidly degrade imaging quality. A mismatch between the...

NASA mission to test technology for satellite swarms

A NASA mission slated for launch on Friday will place three tiny satellites into low-Earth orbit, where they will demonstrate how satellites might track and communicate with each other, setting the stage for swarms of thousands of small satellites that can work cooperatively and autonomously.

Scientists make pivotal discovery on mechanism of Epstein-Barr virus latent infection

Researchers at The Wistar Institute have discovered a new enzymatic function of the Epstein-Barr Virus (EBV) protein EBNA1, a critical factor in EBV's ability to transform human cells and cause cancer. Published in Cell, this study provides new indications for inhibiting EBNA1 function, opening up fresh avenues for development of therapies to treat EBV-associated cancers.

Designing customized 'brains' for robots

Researchers have developed an automated way to design customized hardware that speeds up a robot's operation. The system, called robomorphic computing, accounts for the robot's physical layout in suggesting an optimized hardware architecture.

Why older adults must go to the front of the vaccine line

A new global, mathematical modeling study shows that in most cases prioritizing older adults for COVID-19 vaccines saves the most lives. It also found that, in some cases, more lives could be saved and infections prevented if those who've already tested positive step to the back of the line.

Snake sex chromosomes say less about sex and more about survival

Sex-specific chromosomes are a dangerous place to be, if you're a gene. Because these chromosomes—Y chromosomes, in humans—do not have a matching chromosome with which to exchange genetic information, they are prone to losing non-essential genes left and right in a process called genetic decay.

COVID-19 infection in immunodeficient patient cured by infusing convalescent plasma, doctors report

Under FDA emergency-use authorization, doctors successfully resolved COVID-19 in a seriously ill, immunodeficient woman using a very high-neutralizing antibody-titer convalescent plasma from a recovered COVID-19 patient. However, further study suggested that use of convalescent plasma may not be warranted in many cases, for two reasons: 1) titer levels are too low in many convalescent plasmas, and...

Small electric fields can play decisive role in formation of diamond

Diamond, like graphite, is a special form of carbon. Its cubic crystal structure and its strong chemical bonds give it its unique hardness. For thousands of years, it has also been sought after as both a tool and as a thing of beauty. Only in the 1950s did it become possible to produce diamonds artificially for the first time.

Angstrom multilayer metrology by combining spectral measurements and machine learning

With the recent explosive demand for data storage, ranging from data centers to various smart and connected devices, the need for higher-capacity and more compact memory devices is constantly increasing. As a result, semiconductor devices are now moving from 2-D to 3-D. The 3-D-NAND flash memory is the most commercially successful 3-D semiconductor device today, and its demand for supporting our...

Producing green hydrogen through the exposure of nanomaterials to sunlight

A research team from the Institut National de la Recherche Scientifique (INRS) has joined forces with French researchers from the Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES), a CNRS-University of Strasbourg joint research lab, to pave the way towards the production of green hydrogen. This international team has developed new...

Novel effector biology research provides insights into devastating citrus greening disease

Citrus greening disease, also known as Huanglongbing (HLB), is devastating to the citrus industry, causing unprecedented amounts of damage worldwide. There is no known cure. Since the disease's introduction to the United States in the early 2000s, research efforts have increased exponentially. However, there is still a lack of information about the molecular mechanism behind the disease.

Fighting respiratory virus outbreaks through 'nano-popcorn' sensor-based rapid detection

Viral respiratory diseases are easily transmissible and can spread rapidly across the globe, causing significant damage. The ongoing COVID-19 pandemic is a testament to this. In the past too, other viruses have caused massive respiratory disease outbreaks: for example, a subtype of the influenza virus, the type A H1N1 virus, was responsible for the Spanish flu and the Swine flu outbreaks. Thus, to...

Two-photon polymerization of PEGda hydrogel microstructure

The fabrication of shape-memory hydrogel scaffolds not only requires biocompatibility, micrometer resolution, high mechanical strength, but also requires a low polymerisation threshold in high-water content environment to incorporate microstructures with biological tissues. Towards this goal, scientists from China and Australia developed a new hydrogel formula that full fills this goal and...

First-ever atomic resolution video of salt crystals forming in real time

Two novel techniques, atomic-resolution real-time video and conical carbon nanotube confinement, allow researchers to view never-before-seen details about crystal formation. The observations confirm theoretical predictions about how salt crystals form and could inform general theories about the way in which crystal formation produces different ordered structures from an otherwise disordered...

How cells 'eat' their own fluid components

Autophagy is a fundamental cellular process by which cells capture and degrade their own dysfunctional or superfluous components for degradation and recycling. Recent research has revealed that phase separated droplets have a range of important functions in cells. An international collaboration between German, Norwegian, and Japanese researchers has unraveled the mechanisms underpinning both how...

Early humans used chopping tools to break animal bones and consume the bone marrow

Researchers from the Sonia and Marco Nadler Institute of Archaeology at Tel Aviv University unraveled the function of flint tools known as "chopping tools," found at the prehistoric site of Revadim, east of Ashdod. Applying advanced research methods, they examined use-wear traces on 53 chopping tools, as well as organic residues found on some of the tools. They also made and used replicas of the...

Rethink immigration policy for STEM doctorates

A streamlined process for awarding green cards to international STEM doctoral students graduating from U.S. universities could benefit American innovation and competitiveness, including leveling the field for startups eager to attract such highly skilled workers, according to a new study by researchers from Cornell University and the University of California, San Diego.

Solar system formation in two steps

An international team of researchers from the University of Oxford, LMU Munich, ETH Zurich, BGI Bayreuth, and the University of Zurich discovered that a two-step formation process of the early Solar System can explain the chronology and split in volatile and isotope content of the inner and outer Solar System.