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!
Lego-like wall produces acoustic holograms
17.10.2016 | Duke University
New evidence on terrestrial and oceanic responses to climate change over last millennium
11.10.2016 | University of Granada
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences