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Tiny particles baffle physicists, again
04-21-2007 · Science News OnlineAn experiment failed to confirm the existence of a new elementary particle called the sterile neutrino, but its results could still point to some new physics.
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- Long the fixation of physicists worldwide, a tiny particle is found
12-06-2006 · EurekAlert!
After decades of intensive effort by both experimental and theoretical physicists worldwide, a tiny particle with no charge, a very low mass and a lifetime much shorter than a nanosecond, dubbed the "axion," has now been detected by the University at Buffalo physicist who first suggested its existence in a little-read paper as early as 1974.
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- Iowa State physicist leads team designing detector for international particle collider
04-13-2007 · EurekAlert!
John Hauptman, an Iowa State University professor of physics and astronomy, is leading an international team that's designing a detector for the proposed International Linear Collider. The collider would be about 19 miles long and accelerate electrons and positrons to nearly the speed of light. The particles would collide at the center of the machine at extremely high energies. Collider detectors would record those collisions. Physicists expect the collisions to create new particles and help them understand how the universe works.
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- Particle emissions from laser printers might pose health concern
07-31-2007 · EurekAlert!
Certain laser printers used in offices and homes release tiny particles of toner-like material into the air that people can inhale deep into lungs where they may pose a health hazard, scientists are reporting. Their study is scheduled for the Aug. 1 online issue of the American Chemical Society’s Environmental Science & Technology, a semi-monthly journal.
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- New cancer weapon: nuclear nanocapsules
08-23-2007 · EurekAlert!
Rice University chemists have found a way to package some of nature's most powerful radioactive particles inside carbon nanotubes. Alpha-particle radiation is so powerful that cancer cells can be destroyed with just one direct hit from an alpha particle on a cell nucleus. Rice's researchers hope to use their new technology to target tiny tumors and even lone leukemia cells. Their research is available online from the journal Small.
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- Physicists explore Strange Matter Hypothesis
12-18-2006 · EurekAlert!
According to the "Strange Matter Hypothesis," which gained popularity in the paranormal 1980's, nuclear matter, too, can be strange. The hypothesis suggests that small conglomerations of quarks, the infinitesimallytiny particles that attract by a strong nuclear force to form neutronsand protons in atoms, are the true ground state of matter. The theoryhas captivated particle physicists worldwide, including Washington University's Mark Alford, who, with colleagues, has discovered some strange properties.
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- Theoretical physicists develop test for string theory
01-24-2007 · EurekAlert!
For decades, many scientists have criticized string theory, pointing out that it does not make predictions by which it can be tested. Now, researchers at Carnegie Mellon University; the University of California, San Diego; and The University of Texas at Austin have developed a test of string theory. Their test, described in the January 26 Physical Review Letters, involves measurements of how elusive high-energy particles scatter during particle collisions.
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- Penn physicists track the random walks of ellipsoids, test 'lost' theory of Brownian motion
10-26-2006 · EurekAlert!
Research carried out at the University of Pennsylvania has definitively measured and described the Brownian motion of an isolated ellipsoidal particle, completing a path laid out by Einstein 100 years ago when he first described rotational Brownian motion for spheres in water. The findings of the Penn group rediscovered ideas about rotational-translational coupling first published by French physicist Francis Perrin in the 1930s, ideas that were apparently "forgotten" by the science community.
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- Pas de deux for a three-scoop particle
07-07-2007 · Science News Online
Physicists have discovered the first particle containing one member of each of the three families of quarks.
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- Cassini finds more rings highlighted by telltale small particles
10-11-2006 · EurekAlert!
Images taken by NASA's Cassini spacecraft, looking in the direction of the sun, have provided scientists fresh insights into the dynamic nature of the rings and, in particular, the creation of new rings made from tiny particles released from larger bodies.
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- NASA probes the sources of the world's tiny pollutants
01-30-2007 · EurekAlert!
Pinpointing pollutant sources is an important part of the ongoing battle to improve air quality and to understand its impact on climate. Scientists using NASA data recently tracked the path and distribution of aerosols -- tiny particles suspended in the air -- to link their region of origin and source type with their tendencies to warm or cool the atmosphere.
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