The little-known story of the effort by Federal agencies to assure safety of Gulf seafood is the topic of the cover article in the current edition of Chemical & Engineering News (C&EN), ACS's weekly news magazine.
In the story, C&EN Senior Correspondent Ann Thayer points out that U. S. Food and Drug Administration (FDA) officials say ongoing tests consistently show amounts of potentially toxic substances in seafood 100 to 1,000 times smaller than those posing health concerns. The spill, of 4.9 million barrels of oil, forced closing of 88,522 square miles of fisheries, about one-third of the entire Gulf.
Thayer describes how FDA worked on an urgent basis with the National Oceanic and Atmospheric Administration and state agencies to set up the monitoring program. The program uses approaches that range from sniff tests to sophisticated laboratory analysis.
The results underpinned decisions by Federal and state authorities on closing and reopening Gulf fisheries. Officials allowed a gradual reopening of Gulf waters, with the final sector declared safe in April 2011. Safety monitoring continues and despite the reassuring results, safety concerns linger among some scientists and consumers, the article indicates.
Michael Bernstein | EurekAlert!
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Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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