Scientists from the University of Sheffield have developed pigment-free, intensely coloured polymer materials, which could provide new, anti-counterfeit devices on passports or banknotes due to their difficulty to copy.
The polymers do not use pigments but instead exhibit intense colour due to their structure, similar to the way nature creates colour for beetle shells and butterfly wings.
The mass extinction of marine life in our oceans during prehistoric times is a warning that the Earth will see such an extinction again because of high levels of greenhouse gases, according to new research by geologists.
A Toledo, Ohio, physicist has implemented a new mathematical approach that accelerates some complex computer calculations used to simulate the formation of micro-thin materials.
LOS ALAMOS, New Mexico, May 17, 2011—The long-held, but unproven idea that helium-4 enters into an exotic phase of matter dubbed a "supersolid" when cooled to extremely low temperatures has been challenged in a new paper published recently in Science.
The mass extinction of marine life in our oceans during prehistoric times is a warning that the same could happen again due to high levels of greenhouse gases, according to new research.
Professor Martin Kennedy from the University of Adelaide (School of Earth & Environmental Sciences) and Professor Thomas Wagner from Newcastle University, UK, (Civil Engineering and Geosciences) have been studying 'greenhouse oceans' – those that have been depleted of oxygen, suffering increases in carbon dioxide and temperature.
Nitrogen pollution in our coastal ecosystems, the result of widespread use of synthetic agricultural fertilizers and of human sewage, leads to decreased water transparency, the loss of desirable fish species, and the emergence of toxic phytoplankton species—such as the algae behind the renowned "red tides" that kill fish.
The effects are particularly pronounced in the Gulf of Mexico and the Caribbean.
Cigarette smoking, forest fires and woodburning can release a chemical that may be at least partly responsible for human health problems related to smoke exposure, according to a new study by NOAA researchers and their colleagues.
Using a custom mass spectrometer designed by the researchers, the NOAA-led team was able get the first look at levels of the chemical, isocyanic acid, in the atmosphere. Isocyanic acid has been difficult to detect with conventional measurement techniques.
An international team of scientists say the key to a hydrogen economy could come from a very simple mineral, commonly seen as a black stain on rocks.
Their findings, developed with the assistance of researchers at UC Davis in the USA and using the facilities at the Australian Synchrotron, were published in the journal Nature Chemistry yesterday 15 May 2011.
Writing in the scientific journal Nature, scientists have called for increased discussion of independent monitoring of deep-sea hydrocarbon industry activity with the aim of obtaining a better understanding of its ecological impact.
The hydrocarbon industry is increasingly searching for hydrocarbon resources at much greater depths and developing drilling technology to exploit them. However, drilling the seafloor at great depths is technically very challenging and carries with it poorly known risks.
PASADENA, Calif.—Stronger than steel or titanium—and just as tough—metallic glass is an ideal material for everything from cell-phone cases to aircraft parts. Now, researchers at the California Institute of Technology (Caltech) have developed a new technique that allows them to make metallic-glass parts utilizing the same inexpensive processes used to produce plastic parts. With this new method, they can heat a piece of metallic glass at a rate of a million degrees per second and then mold it into any shape in just a few milliseconds.
WASHINGTON — Warning that the risk of dangerous climate change impacts is growing with every ton of greenhouse gases emitted into the atmosphere, a National Research Council committee today reiterated the pressing need for substantial action to limit the magnitude of climate change and to prepare to adapt to its impacts. The nation's options for responding to the risks posed by climate change are analyzed in a new report and the final volume in America's Climate Choices, a series of studies requested by Congress.
Bubbles are blocking the current path of one of the most promising high temperature superconducting materials, new research suggests.
In a Superconductor Science and Technology study published today, researchers have examined bismuth strontium calcium copper oxide (Bi2Sr2CaCu2Ox, Bi2212), one of the most promising superconducting materials capable of creating large magnetic fields way beyond the limit of existing magnets, and found that its capabilities are limited by the formation of bubbles during its fabrication process.
PROVIDENCE, R.I. [Brown University] — Aggregating nearly the entire landmass of Earth, Pangaea was a continent the likes our planet has not seen for the last 200 million years. Its size meant there was a lot of space for animals to roam, for there were few geographical barriers, such as mountains or ice caps, to contain them.
CHAMPAIGN, Ill. — Researchers tracking the spread of Toxoplasma gondii – a parasite that reproduces only in cats but sickens and kills many other animals – have found infected wildlife throughout a 1,500-acre (600-hectare) natural area in central Illinois.
Researchers at the University of Texas at Austin's Cockrell School of Engineering have created a new porous, three-dimensional carbon that can be used as a greatly enhanced supercapacitor, holding promise for energy storage in everything from energy grids and electric cars to consumer electronics.