News tagged with chemical changes
Nanofluidics sorts DNA for cancer research
(Phys.org) -- Cornell nanotechnology researchers have devised a new tool to study epigenetic changes in DNA that can cause cancer and other diseases: a nanoscale fluidic device that sorts and collects DNA, ...
Nanotechnology / Bio & Medicine
May 24, 2012 |
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PCBs levels down in Norwegian polar bears
It's never been easy to be a polar bear. They may have to go months without eating. Their preferred food, seal, requires enormous luck and patience to catch. Add to that the melting of Arctic sea ice due to climate change, ...
Mar 29, 2012 |
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Weathering of rocks impacts climate change
Chemical weathering of rocks by carbon dioxide dissolved in rainwater has never been taken into account in models of future climate change so far. However, researchers from the Laboratoire Géosciences ...
Mar 05, 2012 |
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A secret hidden in Australia's ocean eddies
Deep-diving ocean "gliders" have revealed the journey of Bass Strait water from the Tasman Sea to the Indian Ocean.
Space & Earth / Earth Sciences
Feb 22, 2012 |
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Honeycomb structure responsible for bacteria's extraordinary sense
(PhysOrg.com) -- Cornell researchers have peered into the complex molecular network of receptors that give one-celled organisms like bacteria the ability to sense their environment and respond to chemical ...
Feb 20, 2012 |
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Humans may have helped the decline of African rainforests 3000 years ago
(PhysOrg.com) -- Large areas of rainforests in Central Africa mysteriously disappeared over three thousand years ago, to be replaced by savannas. The prevailing theory has been that the cause was a change ...
Feb 10, 2012 |
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Dry conditions spurred advanced photosynthesis
The need to conserve water played a vital role in driving plants to evolve a specialised form of photosynthesis, scientists have shown.
Feb 03, 2012 |
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Ecologists gain insight into the likely consequences of global warming
A new insight into the impact that warmer temperatures could have across the world has been uncovered by scientists at Queen Mary, University of London.
Jan 20, 2012 |
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Microneedle sensors may allow real-time monitoring of body chemistry
Researchers from North Carolina State University, Sandia National Laboratories, and the University of California, San Diego have developed new technology that uses microneedles to allow doctors to detect real-time ...
Dec 13, 2011 |
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When inflexibility is counterproductive: Mechanism of UV-induced DNA Dewar lesion revealed
Excessive exposure to ultraviolet (UV) radiation of sunlight can result in skin damage and may even induce skin cancers. Irradiation with UV light causes mutations in the DNA, which can interfere with or even inhibit the ...
Nov 28, 2011 |
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Bow down to the light: Light-triggered microscale robotic arm makes bending and stretching motions
(PhysOrg.com) -- As miniaturization progresses, microrobots and nanomachines have moved beyond the realm of pure speculation. This technology requires tiny components that can respond to stimulation by undergoing ...
Nov 21, 2011 |
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Scientists: Bacteria spreading in warming oceans
(AP) -- Warning: The warming of the world's oceans can cause serious illness and may cost millions of euros (dollars) in health care charges.
Sep 13, 2011 |
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Even low doses of insecticides put honeybees at risk
Scientists in France have discovered that honeybees are at a higher risk of dying from infection by Nosema ceranae (N. ceranae) when they are exposed to low doses of insecticides. The results, presented in ...
Sep 01, 2011 |
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Better batteries through nanoscale 3D chemical imaging
Concerns over the finite availability of oil and the effect of greenhouse gases on climate have spurred intense efforts to develop electric-drive vehicles; the major barrier to successful commercialization ...
Nanotechnology / Nanomaterials
Aug 09, 2011 |
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Has warming put 'Dirty Dozen' pollutants back in the saddle?
"Dirty Dozen" chemicals, including the notoriously toxic DDT, are being freed from Arctic sea ice and snow through global warming, a study published on Sunday suggested.
Jul 24, 2011 |
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