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Tag: "copper" at biology news

Polymers with copper show promise for implanted sensors

... researchers found, is copper. "It turns out that copper ions can act as catalysts to take nitrosothiols an...U-M team has been creating polymers that include a copper ion-containing complex. They've demonstrated that complexed copper ions do have the desired catalyti...

Survey finds silver contamination in North Pacific waters

...ur," Luoma said. In San Francisco Bay, silver and copper from industrial discharges reached such high levels in the 1970s and early 1980s that clams stopped reproducing and some species of invertebrates disappeared from mudflats, he said. At that time, silver concentrations in the bay were 100 times higher...

NASA probe could reveal comet life, scientists claim

... include organic matter, they suggest. The mainly copper projectile will hit the comet at 25,000 miles per hour and will penetrate 15-20 metres into the surface before exploding. The comet will remain intact despite losing a huge amount of material ?100,000 tonnes from a 100 metre diameter crater, and the ...

Proteomics brings researchers closer to understanding microbes that produce acid mine drainage

...08 degree Fahrenheit runoff containing zinc, iron, copper and arsenic. "This system is a very tightly coupled biogeochemical system, and we are just trying to find out how it works," she said. "This microbial community is thriving at the extreme edge," added co-author Bob Hettich, a member of ORNL's Chemi...

Old drug shows new promise for Huntington's Disease

... is, it binds metals in body tissues, particularly copper and zinc, and removes them when it is excreted. Massa and other researchers believe that this chelation effect may interfere with production of the mutant huntingtin protein in some way. "But there are still a couple of explanations we need to rule o...

Health benefits of a Christmas brandy

...ants contained in the brandy that come mainly from copper during the distilling process, Dr Troup said. He said a shot (30mls) of brandy would give the equivalent antioxidant potential to the daily recommended intake of vitamin C. "The antioxidants only make up only a small percentage of substances found ...

Researchers: Treated wood poses long-term threat

...niversity examined arsenic leaching from chromated copper arsenate, or CCA-treated wood, from a real deck as well as from simulated landfills. Their conclusion: The deck wood leached high levels of arsenic into rainwater runoff and the soil -- and treated wood only continued leaching arsenic while sitting ...

Katrina floodwaters not as toxic to humans as previously thought, study says

...ntain high levels of some toxic metals, especially copper and zinc, and could pose a long-term danger to the...etals being discharged into the lake, particularly copper and zinc, can be toxic to fish and other marine life and may bioaccumulate and contaminate seafood c...

Anthrax spores may survive water treatment

...ores had attached themselves to the surface of the copper and CPVC pipes, 95 percent attached to the iron pi...s. When biofilms were present on the interior of copper pipes attachment increased to 80 percent. "The data seem to suggest that anthrax spores can tolera...

Nanotubes used for first time to send signals to nerve cells

... as dense, able to conduct electricity better than copper or to substitute for silicon in semiconductor chips, carbon nanotubes have been proposed as the basis for everything from elevator cables that could lift payloads into Earth orbit to computers smaller than human cells. Thin films of carbon nanotube...

Researchers examine why food tastes bad to chemotherapy recipients

...vels, and adverse health effect levels of iron and copper in water, and their relationship to health-based p...cronutrients in the human diet. In fact, iron and copper are commonly found in drinking water, and they can be an important source of these mircronutrients. ...

Carnegie Mellon scientists use 'green' approach to transform plastics manufacturing

...edented materials. "By reducing the level of the copper catalyst used in ATRP, we have made this process a...e ATRP previously required a high concentration of copper catalyst that had to be removed from finished products. "Our new ATRP processes significantly redu...

Monitoring poisons in the environment -- a woolly matter

...cant correlations were found between the amount of copper and lead found in washed wool from sheep and in local streams. Median copper concentration in North Ronaldsay wool was comparatively high despite lower soil concentrations. Shet...

Cancer cells forming blood vessels send their copper to the edge

...d vessels critical to the spread of cancer and the copper in our bodies has been discovered by researchers f...oles in many life processes. Compounds that reduce copper in the body without disrupting the body's normal functions can inhibit the growth of blood vessels ?...

Walking molecule now carries packages

... for 2005." The new molecule carrier runs on a copper surface. It can pick up and release up to two carb...cules. Experiments took place on a highly polished copper surface, cleaned so that only the desired molecules were present on it. An individual anthraquinone ...

Researchers create artificial enzyme that mimics the body's internal engine

...organic molecule called phenol, an iron atom and a copper atom. Working together, these three centers provide the four electrons necessary to transform oxygen into water. "How all four electrons are added to oxygen has always been mysterious," Collman said. "Very few people study it. It's quite complex, and...

Asexual worm quickly adapts to soil contamination

...e was exposed to a combination of different pH and copper values. As well as their individual effects, the pH and the copper levels in the soil can exert a synergistic effect on the nematode population. Unexpectedly fast adap...

The longest carbon nanotubes you've ever seen

...stronger and better conductors of electricity than copper and many other materials--could ultimately find use in smart fabrics, sensors and a host of other applications. To grow the aligned bundles of tiny tubes, the researchers combined advantages of chemical vapor deposition (CVD), a technique for crea...

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