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10 April 2014 11:44 am ,
Vol. 344 ,
Tight budgets are forcing NASA to consider turning off one or more planetary science projects that have completed their...
Ebola is not a stranger to West Africa—an outbreak in the 1990s killed chimpanzees and sickened one researcher. But the...
In an as-yet-unpublished report, an international panel of geoscientists has concluded that a pair of deadly...
Tropical disease experts tried and failed before to eradicate yaws, a rare disfiguring disease of poor countries. Now,...
Since 2002, researchers have reported that agricultural communities in the hot and humid Pacific Coast of Central...
Balkan endemic kidney disease surfaced in the 1950s and for decades defied attempts to finger the cause. It occurred...
The Pyrenean ibex, an impressive mountain goat that lived in the central Pyrenees in Spain, went extinct in 2000. But a...
- 10 April 2014 11:44 am , Vol. 344 , #6180
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Getting a Charge Out of Liquids
14 October 1999 7:00 pm
Friedrich Kohlrausch, a German physicist who did pioneering work on how electricity is transmitted in solutions, was born on this day in 1840. Kohlrausch is best known for a method to measure electrical conductivity using an alternating current, which determined that conductivity is lower in more dilute solutions. Kohlrausch also showed that there are two molecular players involved in conductivity: the cation, or positively charged ion, and the anion, or negatively charged ion.
[Source: Trevor I. Williams, Ed. A Biographical Dictionary of Scientists, Third Edition. John Wiley & Sons. New York. 1982.]