Many imaging technologies and their contrast agents — chemicals used during scans to help detect tumors and other problems — involve exposure to radiation or heavy metals, which present potential health risks to ...
Dec 23, 2011
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(PhysOrg.com) -- A protein’s function depends on both the chains of molecules it is made of and the way those chains are folded. And while figuring out the former is relatively easy, the latter represents ...
Dec 22, 2011
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(PhysOrg.com) -- Earthquakes are some of the most daunting natural disasters that scientists try to analyze. Though the earth's major fault lines are well known, there is little scientists can do to predict ...
Nov 30, 2011
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(PhysOrg.com) -- Despite amazing advances in computers and cameras, people with serious visual impairments are often aided with the most basic technology imaginable: a cane.
Nov 15, 2011
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(PhysOrg.com) -- Research from the University of Pennsylvania has found that success in recruiting minority teachers for low-income schools is being undone by continuing problems with teacher retention.
Oct 12, 2011
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In solid materials with regular atomic structures, figuring out weak points where the material will break under stress is relatively easy. But for disordered solids, like glass or sand, their disordered nature makes such ...
Aug 31, 2011
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It is helpful — even life-saving — to have a warning sign before a structural system fails, but, when the system is only a few nanometers in size, having a sign that's easy to read is a challenge. ...
Aug 18, 2011
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A team of University of Pennsylvania physicists has shown how to disrupt the "coffee ring effect" — the ring-shaped stain of particles leftover after coffee drops evaporate — by changing the particle ...
Aug 17, 2011
4.6 / 5 (15)
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Even in trace quantities, the radioactive gas radon is very dangerous; it is second only to cigarette smoking as a cause of lung cancer deaths in the United States. The expense and precautions necessary to study it safely ...
Jul 30, 2011
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(PhysOrg.com) -- Penn researchers have helped develop a nanotech device that combines carbon nanotubes with olfactory receptor proteins, the cell components in the nose that detect odors.
Jul 26, 2011
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Renaissance architects demonstrated their understanding of geometry and physics when they built whispering galleries into their cathedrals. These circular chambers were designed to amplify and direct sound ...
Jul 22, 2011
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(PhysOrg.com) -- Publishing their findings in Science, the researchers have been able to show a remarkable relationship between copper and pigment within exceptionally preserved feathers and other soft tissue ...
Jun 30, 2011
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When semiconductor nanorods are exposed to light, they blink in a seemingly random pattern. By clustering nanorods together, physicists at the University of Pennsylvania have shown that their combined "on" time is increased ...
Jun 23, 2011
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(PhysOrg.com) -- An international research team including University of Pennsylvania scientists has shown that the rate of sea-level rise along the U.S. Atlantic coast is greater now than at any time in the ...
Jun 20, 2011
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