Things can go downhill fast when a patient has sepsis, a life-threatening condition in which bacteria or fungi multiply in a patient's blood—often too fast for antibiotics to help. A new device inspired by the human spleen and developed by a team at Harvard's Wyss Institute for Biologically Inspired Engineering may radically transform the way doctors treat sepsis.
Lamprey—slimy, eel-like parasitic fish with tooth-riddled, jawless sucking mouths—are rather disgusting to look at, but thanks to their important position on the vertebrate family tree, they can offer important insights about the evolutionary history of our own brain development, a recent study suggests.
The very idea of fibers made of carbon nanotubes is neat, but Rice Univ. scientists are making them neat—literally. The single-walled carbon nanotubes in new fibers created at Rice line up like a fistful of uncooked spaghetti through a process designed by chemist Angel Martí and his colleagues.
The central mystery of quantum mechanics is that small chunks of matter sometimes seem to behave like particles, sometimes like waves. For most of the past century, the prevailing explanation of this conundrum has been what’s called the “Copenhagen interpretation”—which holds that, in some sense, a single particle really is a wave, smeared out across the universe, that collapses into a determinate location only when observed.
A comprehensive look at how tiny particles in a lithium-ion battery electrode behave shows that rapid-charging the battery and using it to do high-power, rapidly draining work may not be as damaging as researchers had thought—and that the benefits of slow draining and charging may have been overestimated.
As integrated circuits become increasingly miniaturized and the sizes of magnetic components approach nanoscale dimensions, magnetic properties can disappear. Scientists in Japan, with the help of a form of electron microscopy called split-illumination electron holography, have gained important insights into the development of stable, strong nanomagnets by discovering magnetism-amplifying atomic disorder in iron-aluminum alloys.
The central mystery of quantum mechanics is that small chunks of matter sometimes seem to behave like particles, sometimes like waves. The traditional view holds that a single particle really is a wave that collapses only when observed. But John Bush, of the Massachusetts Institute of Technology, believes that another explanation, the pilot-wave theory, deserves a second look.
Evolutionary biology techniques can and must be used to help solve global challenges in agriculture, medicine and environmental sciences, advises a nine-member global team led by an evolutionary ecologist from Univ. of California, Davis.
Scientists at NIST have determined that polonium-209, the longest-lived isotope of this radioactive heavy element, has a half-life about 25% longer than the previously determined value, which had been in use for decades. The new NIST measurements could affect geophysical studies such as the dating of sediment samples from ocean and lake floors.
Picture the fearsome creatures of "Jurassic Park" crossed with the shark from "Jaws." Then super-size to the biggest predator ever to roam Earth. Now add a crocodile snout as big as a person and feet like a duck's. The result gives you some idea of a bizarre dinosaur scientists unveiled Thursday. This patchwork of critters, a 50-foot predator, is the only known dinosaur to live much of its life in the water.
The ideal energy or information storage system is one that can charge and discharge quickly, has a high capacity and can last forever. Nanomaterials are promising to achieve these criteria, but scientists are just beginning to understand their challenging mechanisms. Now, a team from Stanford Univ. has provided new insight into the storage mechanism of nanomaterials that could facilitate development of improved batteries and memory devices.
A simple point-of-care testing device for anemia could provide more rapid diagnosis of the common blood disorder and allow inexpensive at-home self-monitoring of persons with chronic forms of the disease. The disposable self-testing device analyzes a single droplet of blood using a chemical reagent that produces visible color changes corresponding to different levels of anemia.
A new $1.9 million study at the Univ. of Michigan seeks to make low-dose computed tomography scans a viable screening technique by speeding up the image reconstruction from half an hour or more to just five minutes. The advance could be particularly important for fighting lung cancers, as symptoms often appear too late for effective treatment.
New research findings point toward future approaches to fighting bacterial biofilms that foul everything from implantable medical devices to industrial pipes and boat propellers. Bacteria secrete a mucus-like “extracellular polymeric substance” that forms biofilms, allowing bacterial colonies to thrive on surfaces.
When moving through a conductive material in an electric field, electrons tend to follow the path of least resistance—which runs in the direction of that field. But now physicists have found an unexpectedly different behavior under very specialized conditions—one that might lead to new types of transistors and electronic circuits that could prove highly energy efficient.
Imagine a balloon that could float without using any lighter-than-air gas. Instead, it could simply have all of its air sucked out while maintaining its filled shape. Such a material might be possible with a new method developed at the California Institute of Technology that allows engineers to produce a ceramic that contains about 99.9% air yet is strong enough to recover its original shape after being smashed by more than 50%.
A new study published in The Journal of Geology provides support for the theory that a cosmic impact event over North America some 13,000 years ago caused a major period of climate change known as the Younger Dryas stadial, or “Big Freeze.” The key to the mystery of the Big Freeze lies in nanodiamonds scattered across Europe, North America, and portions of South America.
The production and consumption of chemical substances threatening the ozone layer has been regulated since 1987 in the Montreal Protocol. Eight international expert reports have since been published, the most recent of which was presented on Sept. 10 at the United Nations Headquarters in New York. Model calculations reveal that by 2050 the ozone layer may return to its 1980 levels.
Researchers in Sweden have shown how to use sound to communicate with an artificial atom, in this case an electric circuit that obeys quantum laws. By coupling acoustic waves to the atom, they can demonstrate phenomena from quantum physics with sound taking on the role of light.
Researchers have discovered that a known quality control mechanism in human, animal and plant cells is active against viruses. They think this new form of a so-called “innate immune defense” might represent one of the oldest defense mechanisms against viruses in evolutionary history.
Bacteria secrete a mucus-like “extracellular polymeric substance” that forms biofilms, allowing bacterial colonies to thrive on surfaces. Costs associated with biofilms affecting medical devices and industrial equipment amount to billions of dollars annually. New research reveals specifics about interactions that induce bacteria to swim close to surfaces and attach to biofilms. This may point to future approaches for fighting biofilms.
Workers at Kennedy Space Center gathered to watch as the Orion capsule, NASA's new spacecraft for humans, emerged from its assembly hangar Thursday morning, less than three months from its first test flight. During its Dec. 4 test flight, the capsule, unmanned, will shoot more than 3,600 miles into space and take two laps around Earth before re-entering the atmosphere at 20,000 mph and parachuting into the Pacific off the San Diego coast.
A team of Lawrence Berkeley National Laboratory researchers believes it has uncovered the secret behind the unusual optoelectronic properties of single atomic layers of transition metal dichalcogenide (TMDC) materials, the 2-D semiconductors that hold great promise for nanoelectronic and photonic applications.
Researchers from North Carolina State Univ., Duke Univ. and the Univ. of Copenhagen have created the world’s largest DNA origami, which are nanoscale constructions with applications ranging from biomedical research to nanoelectronics. DNA origami are self-assembling biochemical structures that are made up of two types of DNA.
Plastics are made of polymers, which are a challenge for scientists to study. Their chain-like strands of thousands of atoms are tangled up in a spaghetti-like jumble, their motion can be measured at many time scales and they are essentially invisible to some common x-ray study techniques. A better understanding of polymers at the molecular scale could lead to improved manufacturing techniques and the creation of new materials.