The Alchemist Newsletter: December 6, 2005
03-20-09 08:08 AM
December 6, 2005
The Alchemist this week turns on to molecular switches, neutron news, antimatter molecules, and cannabis inhalers. Finally, we also get turned on to super compressible nanotube foams.
Flipping the molecular switch
Researchers at Pennsylvania State, Rice, and Oregon Universities have devised a method for switching the state of single molecules. The research demonstrates that single-molecule switches can made to respond predictably in an electric field. The researchers engineered different molecules to switch on and others to switch off in response to the same electric field. Paul Weiss and colleagues will publish details of their work in JACS in December. The next step is for chemists to find a way to wire these molecular switches together.
Scientists discover how to flip a molecular switch
back to top
November 24, the Max Planck Institute for Metals Research in Stuttgart and the Technical University of Munich inaugurated a new kind of neutron/X-ray reflectometer called "N-REX +" which the developers say will provide new insights into materials such as high temperature superconductors, semiconductors, and ceramics. High flux neutrons could be key to understanding the behaviour of materials and thin films at the atomic level.
Neutrons, the Spies of the Nanoworld
back to top
What's the antimatter?
"Molecules" composed of matter and its opposite number antimatter have been observed in a fleetingly short-lived gas. The molecules form as a result of interactions between positronium atoms - a bound electron and positron - in a dense but short-lived gas of such atoms. Allen Mills of the University of California at Riverside and his colleagues collected and compressed positrons in a magnetic trap and then fired super-intense positron pulses at a thin film of "nano-porous" silica. The team observed a much higher positronium decay rate than expected, suggesting that some of the atoms were joining up to form "molecules".
back to top
Drug research goes to pot
UK multiple sclerosis sufferers, and potentially those with rheumatoid arthritis, could soon be puffing on "cannabis" inhalers thanks to a government ruling. The British Home Office will allow the mouth spray drug, Sativex, to be imported for individual patients in exceptional cases, provided it is physician recommended. It is unclear how many of the estimated 85,000 MS patients in the UK might benefit from Sativex. Anecdotal evidence suggests, however, that some use more traditional forms of cannabis to relieve their symptoms.
Cannabis-based medicine given go-ahead to treat MS patients
back to top
Flexing nanotube foams
Films of aligned carbon nanotubes are apparently super-compressible and could be used to create nanotube foams that maintain their resilience even after thousands of compression cycles. In conventional foams, strength and flexibility are mutually exclusive. With the carbon nanotube foam, there is no such tradeoff. These nanotubes can be squeezed to less than 15% of their normal lengths and might be useful in flexible electromechanical systems or energy-absorbent coatings.
Nanotube Foams Flex and Rebound With "Super Compressibility"
back to top
-- David Bradley, Science Journalist
Small - the interdisciplinary forum for the very best experimental and
theoretical studies of fundamental and applied research in synthetic
procedures, materials properties and characterization, devices, and other
applications at the micro and nano scales. It's an attractive mix of
peer-reviewed Communications, Reviews, Concepts, Highlights, Essays, and
Plasma Processes and Polymers is THE interdisciplinary journal on low-temperature plasma sources and processes operating at pressures ranging from partial vacuum to
atmospheric. It publishes an attractive mixture of Reviews, Feature Articles, Full
Papers, Communications, Book Reviews, Conference Reports, Essays and Plasma
News. Now also listed in ISI!
Nature Chemical Biology
December issue published - view selected articles
The December issue of Nature Chemical Biology demonstrates the utility of
small molecules for modulating biological processes and offering leads for
therapeutic applications. Two studies focussing on small molecule regulation
of proteins involved in the immune response are free to view this month. Visit Nature Chemical Biology to read more!
Malvern Instruments Ltd.
Malvern is a leading supplier of analytical solutions for particle characterization (size, shape, zeta potential, molecular weight) and rheological applications. Advanced technologies are combined with robust mechanical designs and comprehensive software to provide on-line, at-line and off-line solutions for QA/QC, control and development applications. An extensive support service facilitates the exploitation of any given system.
Trade Publications FREE to Qualified subscribers of "The Alchemist" and Chemweb.com.
No hidden or trial offers, and no purchase necessary. Publications are absolutely free to those who qualify.
Nov 15, 2005
Nov 1, 2005
Oct 18, 2005
Oct 4, 2005
Sep 20, 2005
Sep 6, 2005
Aug 18, 2005
Aug 2, 2005
July 19, 2005
July 08, 2005
June 21, 2005
June 7, 2005
May 17, 2005
May 3, 2005
Apr 18, 2005
Apr 8, 2005
Mar 22, 2005
Mar 8, 2005
Feb 22, 2005
Feb 8, 2005
Jan 25, 2005
Jan 11, 2004
Dec 28, 2004
Dec 14, 2004
Nov 30, 2004
Nov 11, 2004
Oct 29, 2004
Oct 13, 2004
Sep 28, 2004
Sep 13, 2004
Aug 19, 2004