An emerging class of electrically conductive plastics called "radical polymers” may bring low-cost, transparent solar cells, flexible and lightweight batteries, and ultrathin antistatic coatings for consumer electronics and aircraft. Researchers have established the solid-state electrical properties of one such polymer, called PTMA, which is about 10 times more electrically conductive than common semiconducting polymers.
Researchers have developed a new method for harvesting the energy carried by particles known as “dark” spin-triplet excitons with close to 100% efficiency, clearing the way for hybrid solar cells which could far surpass current efficiency limits. To date, this type of energy transfer had only been shown for “bright” spin-singlet excitons.
It is estimated that as many as half of patients taking cancer drugs experience a decrease in mental sharpness, but what causes “chemo brain” has eluded scientists. In the study involving a sea snail that shares many of the same memory mechanisms as humans and a drug used to treat cancer, scientists in Texas identified memory mechanisms blocked by the drug. Then, they were able to counteract the mechanisms by administering another agent.
Anyone who has blown a bubble and seen how quickly it pops has first-hand experience on the major challenge in creating stable foams. At its most basic level, foam is a bunch of bubbles squished together. Liquid foams, a state of matter that arises from tiny gas bubbles dispersed in a liquid, are familiar in everyday life, from beer to bathwater. They also are important in commercial products and processes.
Scientists have long known that your DNA influences how much java you consume. Now a huge study has identified some genes that may play a role. Their apparent effect is quite small. But variations in such genes may modify coffee's effect on a person's health, and so genetic research may help scientists explore that.
According to two recent studies, viruses can convert their DNA from solid to fluid form, explaining how viruses manage to eject DNA into the cells of their victims. The researchers in one study, which focused on herpes infections, say the discovery was surprising: No one was previously aware of the “phase transition” from solid to fluid form in virus DNA.
Trying on clothes when a shop is closed could become a reality thanks to new research that uses semi-transparent mirrors in interactive systems. The innovation, which builds on a mirror’s ability to map a reflection to one unique point behind the mirror, independently of the observer’s location, could change the way people interact and collaborate in public spaces, such as museums and shop windows.
Beneath the waves, many creatures sport iridescent structures that rival what scientists can make in the laboratory. A research team has now shown how giant clams use these structures to thrive, operating as exceedingly efficient, living greenhouses that grow symbiotic algae as a source of food. This understanding could have implications for alternative energy research, paving the way for new solar panels or improved ways to grow biofuel.
Washington State University undergraduate Kellie Wall, 21, recently looked for evidence that water influenced crystal formation in basalt, the dark volcanic rock that covers most of eastern Washington and Oregon. She then compared this with volcanic rock observations made by the rover Curiosity on Mars’ Gale Crater, inventing a new method for detecting water on Mars.
A new Georgia Institute of Technology study shows that an intense workout of as little as 20 min can enhance episodic memory, also known as long-term memory for previous events, by about 10% in healthy young adults. The research isn’t the first to find that exercise can improve memory. But the study took a few new approaches, including testing memory after just single period of exercise.
Inspired by a desire to help wounded soldiers, an international team has created a paint-on, see-through, “smart” bandage that glows to indicate a wound’s tissue oxygenation concentration. Because oxygen plays a critical role in healing, mapping these levels in severe wounds and burns can help to greatly improve the success of surgeries to restore limbs and physical functions.
Brine shrimp, which are sold as pets known as sea-monkeys, are tiny—only about half an inch long each. With about 10 small leaf-like fins that flap about, they look as if they could hardly make waves. But get billions of similarly tiny organisms together and they can move oceans.
For decades, planetary geologists have speculated that glaciers might once have crept through Valles Marineris, the 2000-mile-long chasm that constitutes the Grand Canyon of Mars. A research team has now identified what could be the first mineralogical evidence of past glaciers within the Valles Marineris: a layer of mixed sulfate minerals halfway up three-mile-high cliffs in the canyon system.
Droplets are simple spheres of fluid, not normally considered capable of doing anything on their own. But now researchers have made droplets of alcohol move through water, even moving through complex mazes. The droplets can be led to certain targets, using a surprisingly simple impetus. In the future, such moving droplets may deliver medicines, moving entire chemistries to targets.
Certain primordial stars—those between 55,000 and 56,000 times the mass of our sun, or solar masses—may have died unusually. In death, these objects—among the universe’s first-generation of stars—would have exploded as supernovae and burned completely, leaving no remnant black hole behind.
Almost all of today’s previously existing cell-sorting methods rely on what is called a single-cell analysis platform. A researcher in Hawaii took a different approach, inventing a bulk method that sorts different cell populations by tuning their solubility. Instead of targeting individual features, the measurement principle sorts cells by differentiating their characteristic surface free energies.
Astronomers using data from NASA's space telescopes Hubble, Spitzer, and Kepler have discovered clear skies and steamy water vapor on a gaseous planet outside our solar system. The planet is about the size of Neptune, making it the smallest planet from which molecules of any kind have been detected.
Bacillus anthracis bacteria have very efficient machinery for injecting toxic proteins into cells, leading to the potentially deadly infection known as anthrax. A team of Massachusetts Institute of Technology (MIT) researchers has now hijacked that delivery system for a different purpose: administering cancer drugs.
The liver provides critical functions, such as ridding the body of toxins, but its failure can be deadly, and there are few options for fixing it. A promising alternative in development is transplanting liver cells made using adult stem cells, but the only source identified until now has been bone marrow. Recently, scientists identified another, more convenient, source of adult stem cells that could be used for this purpose:tonsils.
Deutsche Post DHL says it is starting Germany's first drone package delivery service, a test program transporting medicine to a pharmacy on a North Sea island. The company said the quad-rotor "DHL Paketkopter 2.0" will begin daily flights Friday, bringing a maximum load of 1.2 kg of medicine to the German island of Juist.
Researchers in the Netherlands have managed to open nanovesicles in a reversible process and close them using a magnet. Previously, these vesicles had been “loaded” with a drug and opened elsewhere using a chemical process, such as osmosis. The magnetic method, which is repeatable, is the first to demonstrate the viability of another method.
Antarctic fish that manufacture their own "antifreeze" proteins to survive in the icy Southern Ocean also suffer an unfortunate side effect: The protein-bound ice crystals that accumulate inside their bodies resist melting even when temperatures warm. Ice that doesn't melt at its normal melting point is referred to as "superheated”, and the phenomenon was an unexpected discovery by scientists in Oregon and Illinois.
Researchers are developing a robotic fabric that moves and contracts and is embedded with sensors, an approach that could lead to "active clothing" or a new class of "soft" robots. The robotic fabric, developed at Purdue Univ., is a cotton material containing sensors made of a flexible polymer and threadlike strands of a shape-memory alloy that return to a coiled shape when heated, causing the fabric to move.
Univ. of Minnesota electrical engineering researchers have developed a unique nanoscale device that for the first time demonstrates mechanical transportation of light. The tiny device is just .7 micrometers by 50 micrometers and works almost like a seesaw. On each side of the “seesaw benches,” researchers etched an array of holes, called photonic crystal cavities. These cavities capture photons that streamed from a nearby source.
Achieving complete breakdown of plant biomass for energy conversion in industrialized bioreactors remains a complex challenge, but new research shows that termite fungus farmers solved this problem more than 30 million years ago. The new insight reveals that the great success of termite farmers as plant decomposers is due to division of labor.