Bringing atoms to a standstill: Researchers miniaturize laser cooling
214,750 articles from PhysOrg
Advances in modeling and sensors can help farmers and insurers manage risk
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.
Researchers prove fish-friendly detection method more sensitive than electrofishing
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...
Squeezing a rock-star material could make it stable enough for solar cells
Delivering a minor electric shock into a stream to reveal any fish lurking nearby may be the gold standard for detecting fish populations, but it's not much fun for the trout.
Nature's decline risks our quality of life
Among the materials known as perovskites, one of the most exciting is a material that can convert sunlight to electricity as efficiently as today's commercial silicon solar cells and has the potential for being much cheaper and easier to manufacture.
A cascaded dual deformable phase plate wavefront modulator enables direct AO integration with existing microscopes
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...
NASA mission to test technology for satellite swarms
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...
Scientists make pivotal discovery on mechanism of Epstein-Barr virus latent infection
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.
Snake sex chromosomes say less about sex and more about survival
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.
Small electric fields can play decisive role in formation of diamond
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.
Angstrom multilayer metrology by combining spectral measurements and machine learning
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.
Antarctica: The ocean cools at the surface but warms up at depth
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...
Scientists discover how the potentially oldest coral reefs in the Mediterranean developed
Scientists from the CNRS, CNES, IRD, Sorbonne Université, l'Université Toulouse III—Paul Sabatier and their Australian colleagues, with the support of the IPEV, have provided a comprehensive analysis on the evolution of Southern Ocean temperatures over the last 25 years.
Producing green hydrogen through the exposure of nanomaterials to sunlight
A new study from the Institut de Ciències del Mar (ICM-CSIC, Spain) and the National Oceanography Centre brings unprecedented insights into the environmental constraints and climatic events that controlled the formation of these reefs.
Novel effector biology research provides insights into devastating citrus greening disease
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...
Fighting respiratory virus outbreaks through 'nano-popcorn' sensor-based rapid detection
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.
Boosted photocatalysis for hydrogen evolution: Reactant supply thru phosphonate groups
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
Water splitting research for solar hydrogen production has focused on physical processes inside the semiconductor, such as light absorption, charge separation, and chemical processes on the surface that are highly complex and rely on the development of new materials. However, processes inside the solution had yet to be thoroughly explored.
First-ever atomic resolution video of salt crystals forming in real time
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...
How cells 'eat' their own fluid components
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...
Early humans used chopping tools to break animal bones and consume the bone marrow
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...
Rethink immigration policy for STEM doctorates
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...
Solar system formation in two steps
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.
Spitting Cobra venom reveals how evolution often finds the same answer to a common problem
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.
Researchers develop new graphene nanochannel water filters
A study of spitting cobras, published in Science reveals how a combination of venom components have evolved to create an instantly painful venom, not once, but on three separate occasions.
Invasive tawny crazy ants have an intense craving for calcium – with implications for their spread in the US
When sheets of two-dimensional nanomaterials like graphene are stacked on top of each other, tiny gaps form between the sheets that have a wide variety of potential uses. In research published in the journal Nature Communications, a team of Brown University researchers has found a way to orient those gaps, called nanochannels, in a way that makes them more useful for filtering water and other...
When football clubs are less successful, fans are more loyal to each other
In a recent study, my colleagues and I discovered micronutrients in the ground can control populations of invasive crazy ants (Nylanderia fulva).
As oceans warm, large fish struggle
Football fans tend to be highly loyal to their group, just as the kin groups of our ancestral past would have been. This intense state of belonging, when a person feels as one with their group, is called identity fusion.
A mathematical framework enables accurate characterization of shapes
Warming ocean waters could reduce the ability of fish, especially large ones, to extract the oxygen they need from their environment. Animals require oxygen to generate energy for movement, growth and reproduction. In a recent paper in the Proceedings of the National Academy of Science, an international team of researchers from McGill, Montana and Radboud universities describe their newly...
'Fact-checkers' proposed for Nobel peace prize
In nature, many things have evolved that differ in size, color and, above all, in shape. While the color or size of an object can be easily described, the description of a shape is more complicated. In a study now published in Nature Communications, Jacqueline Nowak of the Max Planck Institute of Molecular Plant Physiology and her colleagues have outlined a new and improved way to describe shapes...
Embedded counseling services can improve accessibility for students
With truth famously known as the "first casualty of war," a Norwegian parliamentarian announced Thursday that she is nominating "fact-checkers" for this year's Nobel Peace Prize.
Seeds transfer their microbes to the next generation
Kerry Karaffa is the first MU Counseling Center psychologist to be embedded specifically within the University of Missouri College of Veterinary Medicine, where he provides tailored counseling services for professional students training to become veterinarians. He is also aware that veterinarians are at increased risk for mental health concerns and suicidality compared to the general public due to...
Pioneering new technique could revolutionise super-resolution imaging systems
Scientists have been pondering if the microbiome of plants is due to nature or nurture. Research at Stockholm University, published in Environmental Microbiology, showed that oak acorns contain a large diversity of microbes, and that oak seedlings inherit their microbiome from these acorns.
A new nanomaterial for the war against counterfeits
Scientists have developed a pioneering new technique that could revolutionize the accuracy, precision and clarity of super-resolution imaging systems.
Climate change puts hundreds of coastal airports at risk of flooding
Despite the anticounterfeiting devices attached to luxury handbags, marketable securities, and identification cards, counterfeit goods are on the rise. There is a demand for the next-generation anticounterfeiting technologies—that surpass the traditional ones—that are not easily forgeable and can hold various data.
Teamwork in a molecule
Even a modest sea level rise, triggered by increasing global temperatures, would place 100 airports below mean sea level by 2100, a new study has found.
When it comes to eyewitness accounts of earthquake shaking, representation matters
Chemists at the Friedrich Schiller University Jena have demonstrated the value of 'teamwork' by successfully harnessing the interaction between two gallium atoms in a novel compound to split the particularly strong bond between fluorine and carbon. The gallium compound is also cheaper and more environmentally friendly than conventional alternatives.
Burial practices point to an interconnected early Medieval Europe
As scientists increasingly rely on eyewitness accounts of earthquake shaking reported through online systems, they should consider whether those accounts are societally and spatially representative for an event, according to a new paper published in Seismological Research Letters.
Tree rings and the Laki volcano eruption: A closer look at climate
Early Medieval Europe is frequently viewed as a time of cultural stagnation, often given the misnomer of the 'Dark Ages'. However, analysis has revealed new ideas could spread rapidly as communities were interconnected, creating a surprisingly unified culture in Europe.
Much of Earth's nitrogen was locally sourced
University of Arizona researchers read between the lines of tree rings to reconstruct exactly what happened in Alaska the year that the Laki Volcano erupted half a world away in Iceland. What they learned can help fine-tune future climate predictions.
Search for axions from nearby star Betelgeuse comes up empty
Where did Earth's nitrogen come from? Rice University scientists show one primordial source of the indispensable building block for life was close to home.
Researchers make domestic high-performance bipolar membranes possible
The elusive axion particle is many times lighter than an electron, with properties that barely make an impression on ordinary matter. As such, the ghost-like particle is a leading contender as a component of dark matter—a hypothetical, invisible type of matter that is thought to make up 85 percent of the mass in the universe.
Ten suggestions for female faculty and staff during the pandemic
The bipolar membrane, a type of ion exchange membrane, is considered the pivotal material for zero emission technology. It is composed of an anode and cathode membrane layer, and an intermediate hydrolysis layer. Under reverse bias, the water molecules in the intermediate layer produce OH- and H+ by polarization.
Astronomers estimate Titan's largest sea is 1,000-feet deep
When university campuses sent students, staff and faculty members home in March, Padmini Rangamani, a professor at the University of California San Diego, suddenly found herself running her research lab remotely, teaching her classes online, and supervising her two children, ages 10 and 13, who are also learning online.
Message in a bottle: Info-rich bubbles respond to antibiotics
Far below the gaseous atmospheric shroud on Saturn's largest moon, Titan, lies Kraken Mare, a sea of liquid methane. Cornell University astronomers have estimated that sea to be at least 1,000-feet deep near its center—enough room for a potential robotic submarine to explore.
Indigenous lands: A haven for wildlife
Once regarded as merely cast-off waste products of cellular life, bacterial membrane vesicles (MVs) have since become an exciting new avenue of research, due to the wealth of biological information they carry to other bacteria as well as other cell types.
French bird flu outbreak coming under control: government
Indigenous peoples' lands may harbor a significant proportion of threatened and endangered species globally, according to University of Queensland-led research.
California harbor porpoises rebound after coastal gillnetting stopped
A bird flu outbreak that has required culls of hundreds of thousands of ducks in southwest France "seems under control for now," the government's top official in the region said Thursday.
Innovations through hair-thin optical fibers
Harbor porpoises have rebounded in a big way off California. Their populations have recovered dramatically since the end of state set-gillnet fisheries that years ago entangled and killed them in the nearshore waters they frequent. These coastal set-gillnet fisheries are distinct from federally-managed offshore drift-gillnet fisheries. They have been prohibited in inshore state waters for more...
Lasers create miniature robots from bubbles
Scientists at the University of Bonn have built hair-thin optical fiber filters in a very simple way. They are not only extremely compact and stable, but also color-tunable. This means they can be used in quantum technology and as sensors for temperature or for detecting atmospheric gases. The results have been published in the journal Optics Express.
Robots are widely used to build cars, paint airplanes and sew clothing in factories, but the assembly of microscopic components, such as those for biomedical applications, has not yet been automated. Lasers could be the solution. Now, researchers reporting in ACS Applied Materials & Interfaces have used lasers to create miniature robots from bubbles that lift, drop and manipulate small pieces into...