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April 22, 2010
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October 28, 2011
Speedy Homemade-Explosive Detector
Forensic Chemistry: A new method could increase the number of explosives detected by airport screeners.
Solar Panel Makers Cry Foul
Trade: U.S. companies complain of market dumping by China.
Novartis To Cut 2,000 Jobs
Layoffs follow similar moves by Amgen, AstraZeneca.
Nations Break Impasse On Waste
Environment: Ban to halt export of hazardous waste to developing world.
New Leader For Lawrence Livermore
Penrose (Parney) Albright will direct DOE national lab.
Hair Reveals Source Of People's Exposure To Mercury
Toxic Exposure: Mercury isotopes in human hair illuminate dietary and industrial sources.
Why The Long Fat?
Cancer Biochemistry: Mass spectrometry follows the metabolism of very long fatty acids in cancer cells.
A study of p-coumaric acid reveals for the first time the spectral characteristics of this important chromophore (J. Am. Chem. Soc., DOI: 10.1021/ja101668v). The results begin to unravel the processes that drive the much-investigated photocycle of the bacterial photoreceptor known as photoactive yellow protein (PYP), in which p-coumaric acid plays a key role. Although chemists believe that the cycle begins with photoinitiated trans-to-cis isomerization of p-coumaric acid, that hypothesis has never been verified. Wybren J. Buma of the University of Amsterdam and colleagues have now used high-resolution excitation and absorption spectra coupled with density functional theory to show that the molecule does indeed undergo this transformation. The findings may “serve as an excellent point of reference for further elucidation” of the PYP system, and photosensory proteins in general, Buma and coworkers write.
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- ISSN 0009-2347
- Copyright © 2011 American Chemical Society
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