Posts Tagged ‘carbon’
Earth & Environment - May 17, 2010 10:29 - 1 Comment
Small investors see red over cap and trade
UC DAVIS (US)—Small investors could be big losers if a federal climate change plan known as cap and trade becomes law and accounting standards for carbon credits are not yet established, a new study suggests. (more…)
Earth & Environment - Apr 28, 2010 12:15 - 0 Comments
‘Black box’ of plankton fix oceans’ carbon
U. WARWICK (UK)—Almost half of the ocean’s carbon fixation is done by eukaryotic phytoplankton, despite the fact that their presence is significantly less than the more abundant blue-green algae known as cyanobacteria. (more…)
Science & Technology - Mar 9, 2010 11:43 - 1 Comment
Tracking mercury’s ‘fingerprint’ in fish
U. MICHIGAN (US)—Scientists know that the primary way methylmercury affects people is through consumption of fish and shellfish. But how does the toxic substance get into species that live in the open ocean? (more…)
Science & Technology - Jan 11, 2010 14:09 - 1 Comment
Nanodragsters hit the street
RICE—Chemists are building better and better nanomachines, the latest of which is a nanodragster—named for its characteristic hot-rod shape—with small wheels on a short axle in the front and large wheels on a long axle in the back. (more…)
Science & Technology - Jan 4, 2010 13:00 - 1 Comment
Ammonia snubbed in nitrogen’s clean break
CORNELL (US)—Chemists have devised a way to break the tough nitrogen-nitrogen bond in the lab and simultaneously create carbon-nitrogen bonds. They fast-tracked the process by skipping the usual energy-intensive, fossil fuel-burning step of creating ammonia. (more…)
Science & Technology - Dec 17, 2009 13:23 - 0 Comments
Scientists film photons with electrons
CALTECH (US)—Recently invented techniques—that allow the real-time, real-space visualization of fleeting changes in the structure of nanoscale matter—have been used to image the evanescent electrical fields produced by the interaction of electrons and photons, and to track changes in atomic-scale structures. (more…)
Earth & Environment, Science & Technology - Oct 22, 2009 16:43 - 0 Comments
New clues in quest for liquid methane
UNC-CHAPEL HILL/U. WASHINGTON (US)—Researchers have taken an important step in converting methane gas to a liquid, potentially making it more useful as a fuel and as a source for making other chemicals. (more…)
Earth & Environment - Sep 29, 2009 4:09 - 2 Comments
Fertilizer not a cure-all for African poverty
CORNELL (US)—Researchers have linked poverty in sub-Saharan Africa with poor soil health, but two new studies find that the recommended practice of applying more fertilizer may not help the poorest farmers. (more…)
Science & Technology - Sep 17, 2009 19:27 - 7 Comments
Nanotubes may yield greener solar cells
In a carbon nanotube-based photodiode, electrons (blue) and holes (red) release their excess energy to efficiently create more electron-hole pairs when light is shined on the device. (Credit: Nathan Gabor)
Science & Technology - Sep 11, 2009 9:48 - 0 Comments
Blame the metal, not the nanotubes
Metal catalysts used to create carbon nanotubes can block a key signaling pathway in neurons. Experiments show the metal particles tend to plug cellular pores normally reserved for calcium ions. (Credit: Lorin Jakubek/Brown University)
Science & Technology - Aug 28, 2009 16:59 - 0 Comments
Fruit flies killed by nanoparticles
Microscopy shows a clean foot and leg of a fruit fly (top), and a foot and leg covered with carbon nanostructures (bottom). Adhering nanostructures may have impeded movement, respiration and vision in adult flies but did not appear toxic to fly larvae that ingested it.
Science & Technology - Jul 31, 2009 14:22 - 0 Comments
Need nanotubes? Go fly a kite
Chemist Bob Hauge and his coauthors say the odako bundles are analogous to the gigantic kites that take many hands to fly, hence the many lines that trail from them. In this case, the lines are nanotubes, hollow cylinders of pure carbon.
Science & Technology - Jul 21, 2009 13:47 - 0 Comments
Faster than supersonic on ‘spiked’ jet fuel
“The idea of being able to put in a very small quantity and have such a dramatic effect is important,” says lead investigator Ilhan Aksay about adding nanocatalysts to jet fuel to improve performance.
Science & Technology - Apr 19, 2009 18:12 - 0 Comments
Unzipping to build the future
RICE (US)—Scientists have found a simple way to create basic elements for aircraft, flat-screen TVs, electronics, and other products that incorporate sheets of tough, electrically conductive material. And the process begins with a zipper. (more…)
