Natural Science

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Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604January 15, 2008

Penn Engineers Create Carbon Nanopipettes That Are Smaller Than Cells and Measure Electric Current

PHILADELPHIA –- University of Pennsylvania engineers and physicians have developed a carbon nanopipette thousands of times thinner than a human hair that measures electric current and delivers fluids into cells. Researchers developed this tiny carbon-based tool to probe cells with minimal intrusion and inject fluids without damaging or inhibiting cell growth.

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Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604December 17, 2007

Agent Orange Chemical, Dioxin, Attacks the Mitochondria To Cause Cancer, Says Penn Research Team

PHILADELPHIA— Researchers with the University of Pennsylvania School of Veterinary Medicine have demonstrated the process by which the cancer-causing chemical dioxin attacks the cellular machinery, disrupts normal cellular function and ultimately promotes tumor progression.

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Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604November 29, 2007

University of Pennsylvania Study Reveals Inconspicuous Hosts in the Lyme Disease Epidemic

PHILADELPHIA -– A study led by a University of Pennsylvania biologist in the tick-infested woods of the Hudson Valley is challenging the widely held belief that mice are the main animal reservoir for Lyme disease in the U.S.

The paper, published in the Proceedings of the Royal Society B, demonstrates that chipmunks and two shrew species, not just mice, are the four species that account for major outbreaks.

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Media Contact: | | November 16, 2007
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Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604November 13, 2007
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Media Contact:Karen Kreeger | Karen.kreeger@uphs.upenn.edu | 215-349-5658
Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604November 7, 2007
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Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604November 1, 2007
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Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604November 1, 2007

“Heftier” Atoms Reduce Friction at the Nanoscale, Study Led By Penn Researcher Reveals

PHILADELPHIA - A research team led by a University of Pennsylvania mechanical engineer has discovered that friction between two sliding bodies can be reduced at the molecular, or nanoscale, level by changing the mass of the atoms at the surface.  Heavier atoms vibrate at a lower frequency, reducing energy lost during sliding.

The study appears in the November issue of the journal Science.

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Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604October 23, 2007
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Media Contact:Jordan Reese | jreese@upenn.edu | 215-573-6604October 23, 2007