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Learning how nature splits water
11-03-2006 · EurekAlert!An international team led by scientists from the US Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) pieced together high-resolution (approximately 0.15 Ångstrom) structures of a Mn4Ca cluster found in a photosynthetic protein complex. Their work could help researchers synthesize molecules that mimic this catalyst, which is a central focus in the push to develop clean energy technologies that rely on sunlight to split water and form hydrogen to feed fuel cells or other non-polluting power sources.
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Keywords: learning, nature, splits, water, split
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- Ecological genetics of freshwater bacteria surveyed
02-01-2008 · EurekAlert!
The first of a new series of articles on 21st Century Directions in Biology describes how new molecular techniques have started to characterize the nature and variation of bacterial populations in fresh water.
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- Speak, memory: Research challenges theory of memory storage
11-14-2006 · EurekAlert!
During sleep, freshly minted memories move from the hippocampus, part of the "old" brain, to the neocortex, or "new" brain, for long-term storage. This has been the reigning theory for decades. Brown University research provides the strongest proof yet of this interaction between the old and new brains -- and offers surprising evidence that challenges critical details of this theory of learning and memory. Results appear in Nature Neuroscience.
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- Arizona State University scientist finds Martian ice is patchy and variable
05-02-2007 · EurekAlert!
For the first time, scientists have found that water ice lies at variable depths over small-scale patches on the Red Planet. The discovery draws a much more detailed picture of underground ice on Mars than was previously available. The new results, by a researcher in Arizona State University's School of Earth and Space Exploration, will appear in Nature. The findings come from data sent back to Earth by THEMIS on NASA's Mars Odyssey orbiter.
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- New findings blow a decade of assumptions out of the water
01-10-2007 · EurekAlert!
The Atlantic Ocean doesn't receive the mother lode of fixed nitrogen, the building block of life, after all. Instead, comparing fathom for fathom, the Pacific and Indian oceans experience twice the amount of nitrogen fixing as the Atlantic, say researchers in the January 11 issue of Nature. The title of an accompanying News and Views piece says it all, "Looking for N2 Fixation in all the Wrong Places."
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- Seismic images show dinosaur-killing meteor made bigger splash
01-23-2008 · EurekAlert!
The most detailed 3-D seismic images yet of the Chicxulub impact crater may modify a theory explaining the "KT Extinction Event" that wiped out most life on Earth, including the dinosaurs. According to research appearing in Nature Geosciences, the asteroid landed in deeper water than previously assumed and therefore released about 6.5 times more water vapor into the atmosphere, possibly making it deadlier by altering climate and generating acid rain.
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- Genetically engineered blood protein can be used to split water into oxygen and hydrogen
12-01-2006 · EurekAlert!
Scientists have combined two molecules that occur naturally in blood to engineer a molecular complex that uses solar energy to split water into hydrogen and oxygen, says research published today in the Journal of the American Chemical Society.
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- Mine runoff continues to provide clues to microbial diversification
03-07-2007 · Oak Ridge National Laboratory (ORNL)
Pink slime at the surface of water trickling through an old mine in California is proving to be a treasure for researchers in their quest to learn more about how bacterial communities exist in nature. A letter published in today's online edition of Nature shows that it is possible to follow what microorganisms are doing in their natural environment by identifying the range of proteins that they produce. The technique, utilized in a microbial community thriving in battery acid-like streams underground at Richmond Mine near Redding, Calif., combines recently developed ways to sequence microbial genes with methods to identify the range of proteins from specific microbial members.
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- Morphine makes lasting -- and surprising -- change in the brain
04-25-2007 · EurekAlert!
Morphine stops the synapse-strengthening process in the brain known as long-term potentiation at inhibitory synapses, according to new research conducted by Brown University brain scientist Julie Kauer. In Nature, Kauer explains this startlingly persistent effect, which could contribute to addiction and may provide a target for treatments of opioid addiction. The research also supports a provocative theory of addiction as a disease of learning and memory.
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- Extra gene copies were enough to make early humans' mouths water
09-09-2007 · EurekAlert!
To think that world domination could have begun in the cheeks. That's one interpretation of a discovery, published online September 9 in Nature Genetics, which indicates that humans carry extra copies of the salivary amylase gene.
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- Researchers mimic lotus leaves for self-cleaning PV arrays, non-stick MEMS
10-13-2006 · EurekAlert!
Researchers are mimicking one of Nature's best non-stick surfaces to help create more reliable electric transmission systems, photovoltaic arrays that retain their efficiency, MEMS structures unaffected by water and improved biocompatible surfaces able to prevent cells from adhering to implanted medical devices.
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