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6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
- About Us
For Whom the Bell Tolls
24 September 1999 6:30 pm
Today is the birthday of Ivar Pavlov, a Russian physiologist born in 1849 who is best known for his studies of the conditioning of dogs. Between 1890 and 1900, Pavlov investigated the secretory mechanisms of digestion in animals. In his most famous experiment, he fitted dogs with a tube on the cheek to measure their saliva production. Each time Pavlov showed the dogs food, he rang a bell, a neutral stimulus with no natural meaning for the dogs. He discovered that if this association was repeated enough times, the bell ringing alone would trigger salivation. Pavlov was awarded the Nobel Prize in physiology or medicine in 1904 for his 1897 work, "Lectures on the Work of the Principal Digestive Gland," which summarized his research findings.
[Source: Roy Porter, Ed., The Biographical Dictionary of Scientists (Oxford University Press, ed. 2, 1994).]