As of October 1 this year the EU requires that emissions of nitrogen oxides be reduced by 30 percent in trucks and 50 percent in diesel-powered cars. In 2008 these regulations will be become more stringent in Europe, and even more so in the US. The technical solution chosen by nearly all automakers to meet the requirements was originally developed by the Lund University in Sweden. Now these researchers are working on methods to reduce nitrogen oxide emissions even more.
Emissions of nitrogen oxides from heavy trucks account for 40 percent of nitrogen oxide emissions in traffic. This is seen as a major environmental problem. Thanks to the so-called three-way catalytic converter, exhaust from gasoline-powered passenger cars is relatively clean. On the other hand, it has been more problematic to clean up the exhaust from diesel-powered vehicles.
To come to grips with the problem, scientists at Lund University have developed the so-called Urea Method. This entails injecting a urine substance, NH2(CO)NH2, into the exhaust fumes in a catalytic converter in the exhaust pipe. This is the method that is now to be used.
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Physicists have developed an innovative method that could enable the efficient use of nanocomponents in electronic circuits. To achieve this, they have developed a layout in which a nanocomponent is connected to two electrical conductors, which uncouple the electrical signal in a highly efficient manner. The scientists at the Department of Physics and the Swiss Nanoscience Institute at the University of Basel have published their results in the scientific journal “Nature Communications” together with their colleagues from ETH Zurich.
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On Tuesday, 19 May 2015 the research icebreaker Polarstern will leave its home port in Bremerhaven, setting a course for the Arctic. Led by Dr Ilka Peeken from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) a team of 53 researchers from 11 countries will investigate the effects of climate change in the Arctic, from the surface ice floes down to the seafloor.
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Nanoengineers at the University of California, San Diego developed a gel filled with toxin-absorbing nanosponges that could lead to an effective treatment for skin and wound infections caused by MRSA (methicillin-resistant Staphylococcus aureus), an antibiotic-resistant bacteria. This "nanosponge-hydrogel" minimized the growth of skin lesions on mice infected with MRSA - without the use of antibiotics. The researchers recently published their findings online in Advanced Materials.
To make the nanosponge-hydrogel, the team mixed nanosponges, which are nanoparticles that absorb dangerous toxins produced by MRSA, E. coli and other...
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