Scientists interested in the Earths carbon cycle – something that must be understood to assess the ongoing effects of carbon dioxide created by human actions, such as driving cars – have a new problem. They need to adjust various calculations because one component, graphitic black carbon, similar to the material found in pencil lead, turns out to be so tough.
In a letter in todays issue of Nature, researchers say that graphitic black carbon is created as sedimentary rocks undergo metamorphism – unlike forms of combustion-derived black carbon such as soot, charcoal and other debris thats left when biomass such as forests or fossil fuels dont burn completely. Eroding from rocks on land, graphitic black carbon appears to be one of the only kinds of carbon that resists conversion to other forms of carbon, such as combining with oxygen to form carbon dioxide, as it cycles between land, atmosphere and oceans.
"Carbon is generally considered to pass fairly freely between reservoirs, or boxes, of the carbon cycle," says lead author Angela Dickens, a doctoral student in chemistry and oceanography at the University of Washington. "The carbon stays in one box for a variable amount of time – for hundreds of years in trees, a few days in a bug, thousands of years as organic carbon dissolved in the worlds oceans and such, but not generally staying more than a few thousand years in any one form before being converted into a different form.
Sandra Hines | EurekAlert!
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An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
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In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
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Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
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For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
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