A polymer is a mesh of chains, which slowly break over time due to the pressure from ordinary wear and tear. When a polymer is squeezed, the pressure breaks chemical bonds and produces free radicals: ions with unpaired electrons, ...
Polymers
Mar 2, 2012
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For years, science has generally considered the phosphorylation of proteins -- the insertion of a phosphorous group into a protein that turns it on or off -- as perhaps the factor regulating a range of cellular processes ...
Biochemistry
Dec 11, 2011
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(PhysOrg.com) -- Maybe because it appears as a speck of blood in the sky, the planet Mars was named after the Roman god of war. From the point of view of life as we know it, that's appropriate. The Martian surface is incredibly ...
Space Exploration
Nov 18, 2011
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Researchers have identified an important cog in the molecular machinery of plant immunity - a discovery that could help crop breeders produce disease-resistant varieties to help ensure future food security. There may also ...
Biotechnology
Oct 2, 2011
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(PhysOrg.com) -- A unique new probe based on luciferase, the enzyme that gives fireflies their glow, enables researchers to monitor hydrogen peroxide levels in mice and thereby track the progression of infectious diseases ...
Biochemistry
Feb 11, 2011
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Using particles that are 1/100,000 the width of a human hair to deliver drugs to cells or assist plants in fighting off pests may sound like something out of a science fiction movie, but these scenarios may be a common occurrence ...
Bio & Medicine
Nov 16, 2010
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Jupiter’s moon Europa has a salty ocean, and scientists have long wondered if life could be found there. One scientist says Europa also has enough oxygen to support an ocean teeming with life.
Space Exploration
May 28, 2010
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MIT chemical engineers have built a sensor array that, for the first time, can detect single molecules of hydrogen peroxide emanating from a single living cell.
Nanophysics
Mar 7, 2010
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(PhysOrg.com) -- The precious metal gold is the material of choice for many technical applications because it does not corrode - and because it also has interesting electrical, magnetic, and optical properties. Gold is thus ...
Materials Science
Jan 14, 2010
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In a new study, scientists at Shanghai Jiaotong University School of Medicine found a promising new way to treat a type of oral cancer known as oral squamous cell carcinoma. The method specifically targets the cancer cells ...
Bio & Medicine
Jul 30, 2024
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