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Archive for July, 2007

Nicotine high hinges on sugar molecule

Posted by David Bradley on July 27th, 2007

Nicotine structureWhen nicotine binds to a neuron, how does the cell know to send the signal that announces a smoker’s high?

Nicotine high hinges on sugar molecule. For more on rehab centers and drug addiction, check out this site.

Wireless Nuclear Magnetic Resonance Spectroscopy

Posted by David Bradley on July 19th, 2007

You may have seen the recent media buzz around MIT’s WiTricity – wireless transmission of electrical power using resonant magnetic induction. When Dimitris Sakellariou sent me his paper on wireless NMR and announced that “We are transferring wirelessly radio-frequency energy and nuclear spin response from a commercial NMR probe to the detector which is embedded inside the sample holder and spins together with it at thousands of turns per second at the magic angle.” I suspected a little bit of bandwagon jumping, but that is not the case. Sakellariou and his colleagues have been working in the field (pardon the pun) of NMR and the related magnetic resonance imaging (MRI) for years, and achieved wireless NMR of solid state samples based on a setup that includes not only a magic angle spin of the sample but of the coil itself.

“Our findings just got published in Nature (vol. 447, p.694, 2007),” Sakellariou told me, “and they are very promising for the study of very small samples under high-resolution conditions.” He confesses that they announced their initial results at the EUROMAR 2005 conference, but many Spinneret readers will be all too aware of how long it can take from initial write-up of a paper until it appears in one’s chosen journal. Getting into the prestigious general science journal Nature also comes with numerous additional obstacles compared with a specialist outlet.

You can read my full write-up on Sakellariou’s work over on SpectroscopyNOW.com

Filter Paper Lead by Atomic Absorption Spectrometry

Posted by David Bradley on July 17th, 2007

LeadA single drop of blood absorbed on to a filter paper is all that is needed for a new test for lead, based on solid sampling-graphite furnace atomic absorption spectrometry (SS-GFAAS).

Filter paper lead by AAS