Physicists at the Univ. of Basel succeed in synthesizing boron-doped graphene nanoribbons and characterizing their structural, electronic and chemical properties. The modified material could potentially be used as a sensor for the ecologically damaging nitrogen oxides, scientists report in Nature Communications.
Researchers at Princeton Univ. have developed a dual catalyst system that directly installs alkyl groups onto compounds called heteroarenes. The new reaction uses simple and abundant alcohols and offers a milder and more widely applicable alternative to existing strategies.
This past summer, filmmakers captured copepods, a type of zooplankton, feeding on small pieces of plastic. Under a microscope at the U.K.’s Plymouth Marine Laboratory, the zooplankton fed on polystyrene beads between seven and 30 micrometers in diameter.
For astronauts living in space with objects zooming around them at 22,000 mph like rogue super-bullets, it’s good to have a backup plan. Although shields and fancy maneuvers could help protect space structures, scientists have to prepare for the possibility that debris could pierce a vessel.
Compounds found in purple potatoes may help kill colon cancer stem cells and limit the spread of the cancer, according to a team of researchers. Baked purple-fleshed potatoes suppressed the growth of colon cancer tumors in petri dishes and in mice by targeting the cancer's stem cells.
Believed to be the first artificial pigment produced, Egyptian blue was inspired by the semiprecious stone lapis lazuli. According to Marc Walton, a research associate professor of materials science and engineering at Northwestern Univ., Ancient Egyptians used the pigment on their walls and on the ceilings of tombs to replicate the night sky. The first documented appearance of the pigment was around 3200 to 3000 BC.
A study has demonstrated a new, efficient way to accelerate positrons, the antimatter opposites of electrons. The method may help boost the energy and shrink the size of future linear particle colliders, powerful accelerators that could be used to unravel the properties of nature’s fundamental building blocks.
A luminescent solar concentrator is an emerging sunlight harvesting technology that has the potential to disrupt the way we think about energy: It could turn any window into a daytime power source.
Scientists have developed a new fuel cell catalyst using earthly abundant materials with performance that is comparable to platinum in laboratory tests. If commercially viable, the new catalyst could replace platinum in electric cars powered by fuel cells instead of batteries, which would greatly extend the range of electric vehicles and eliminate the need for recharging.
Rice Univ. scientists have made a living circuit from multiple types of bacteria that prompts the bacteria to cooperate to change protein expression. The subject of a new paper in Science, the project represents the first time the Rice researchers have created a biological equivalent to a computer circuit that involves multiple organisms to influence a population.
Each spring, powerful dust storms in the deserts of Mongolia and northern China send thick clouds of particles into the atmosphere. Eastward winds sweep these particles as far as the Pacific, where dust ultimately settles in the open ocean. This desert dust contains, among other minerals, iron, an essential nutrient for hundreds of species of phytoplankton that make up the ocean’s food base.
Researchers know about the New Caledonian crow’s ability to fashion hooked tools out of twigs and leaves, using them to harvest grubs. The areas where these grubs reside are often too narrow for the bird’s beak. Some have suggested the crow’s ability to craft tools surpasses the abilities of chimpanzees.
An amalgam of ghostly greens, blues and reds burst forth from the center of a bright white light, diamond-like in shape. The green emissions split off into opposite directions, forming two lobes shaped like butterfly wings. Inside, they house kaleidoscopic jet streams. As the lobes extend outwards into the vastness of space, the colors fade against the black.
In mere seconds, a system developed at Oak Ridge National Laborator can identify and characterize a solid or liquid sample, providing a valuable tool with applications in material science, forensics, pharmaceuticals, biology and chemistry.
Scientists at Lawrence Berkeley National Laboratory have reported a major advance in understanding the biological chemistry of radioactive metals, opening up new avenues of research into strategies for remedial action in the event of possible human exposure to nuclear contaminants.