NMR Knowledge Base / Ezine
EPR spectroscopy: not to be sniffed out in deodorization
Date: Nov 1, 2010
Author: David Bradley
Electron paramagnetic resonance spectroscopy has allowed researchers to study how nanoparticles can eliminate offensive household odours by removing the odour molecules at source rather than simply masking the bad smells.
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Cocaine smuggling: NMR spots illicit cocaine in wine
Date: Oct 14, 2010
Author: David Bradley
Nuclear magnetic resonance spectroscopy can be used to screen large cargos, such as cases of wine bottles, for the presence of illicit cocaine being smuggled in solution in the ethanol.
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Turning up the NMR - Amplification technique boosts surface spectra
Date: Oct 1, 2010
Author: David Bradley
A technique to amplify nuclear magnetic resonance signals 50-fold or more can be applied to surfaces of solid-state samples, according to research published in the Journal of the American Chemical Society.
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Calculating chemists
Date: Sep 15, 2010
Author: David Bradley
A new approach to the calculation of NMR spectra could help organic chemists identify stereoisomers of small, but complex molecules, much more quickly according to theoretical chemists at Cambridge University.
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Novel pocket spotted
Date: Sep 1, 2010
Author: David Bradley
Researchers have identified a new class of chemicals that bind to a previously unknown allosteric pocket-a pocket outside the enzyme active site-and inhibit the enzyme FPPS. The work could have implications for new treatments of bone diseases, Paget's disease and tumour-induced bone degradation.
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Dipolar Halbach magnet stacks made from identically shaped permanent magnets for magnetic resonance
Date: Aug 18, 2010
Author:
NMR Mandhalas (Magnetic Arrangement for Novel Discrete Halbach LAyout) are arrays of identically shaped magnets in a Halbach-type arrangement. They provide a simple and cost-effective way to generate high magnetic fields for mobile applications, for example, in magnetic resonance.
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Fungal inspection
Date: Aug 15, 2010
Author: David Bradley
Two strains of microbial fungi isolated from soil and a commercial white-rot fungus have been tested for biodegradation of untreated, UV-, and heat-treated bisphenol A polycarbonate (PC) to see whether BPA release can be reduced. NMR and FTIR spectroscopy showed the formation of methyl groups due to the pre-treatment process, while EDAX analysis revealed surface oxidation of the PC.
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Aqueous asymmetric acid
Date: Aug 1, 2010
Author: David Bradley
The first example of asymmetric catalysis with a Brønsted acid in aqueous solution has been reported by German chemists who used NMR spectroscopy and mass spectrometry to follow the reactions.
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NMR goes bananas
Date: Jul 15, 2010
Author: David Bradley
A new type of multiply functionalized natural tetrapyrrole , known as Ma-FCC-61, is found in ripening or senescent parts of the banana plant as the breakdown of chlorophyll takes place. An NMR spectroscopic study reveals details and shows that these unique tetrapyrroles carry complex ester functions at the propionyl side chain. These colourful degradation products may act to attract fruit-eating animals that then spread the plant's seeds.
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Problems, artifacts and solutions in the INADEQUATE NMR experiment
Date: Jul 14, 2010
Author:
The INADEQUATE experiment can provide unequalled, detailed information about the carbon skeleton of an organic molecule. However, it also has the reputation of requiring unreasonable amounts of sample. Modern spectrometers and probes have mitigated this problem, and it is now possible to get good structural data on a few milligrams of a typical organic small molecule.
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