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rssJournal Highlight: A tunable multicolour rainbow filter for improved stress and dislocation density field mapping in polycrystals using X-ray Laue microdiffraction
Date: Apr 8, 2013
Author: spectroscopyNOW
A new rainbow method for measuring the energy profiles of Laue spots while remaining in the white-beam mode proceeds in the opposite way compared to a monochromator-based method, by simultaneously removing several sharp energy bands from the incident beam.
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Journal Highlight: NMR quadrupole liouvillians for arbitrary spin: Exact symbolic expressions and perturbation solutions
Date: Apr 1, 2013
Author: spectroscopyNOW
The NMR of quadrupolar nuclei with half-integer spins, which is described by treating the quadrupole interaction with second-order perturbation theory, has been elaborated on by calculating the transitions directly without the requirement of knowing the operators and wavefunctions.
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Chocolate threats: Carcinogenic PAHs
Date: Apr 1, 2013
Author: Steve Down
Several polycyclic aromatic hydrocarbons have been determined in chocolate by GC/MS following a specially devised SPME procedure, giving a more sensitive method than an HPLC procedure developed in 2012 by the same research group.
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Journal Highlight: Trace level detection and identification of nitro-based explosives by surface-enhanced Raman spectroscopy
Date: Apr 1, 2013
Author: spectroscopyNOW
Surface-enhanced Raman spectroscopy has been used to detect and identify traces of pentaerythritol tetranitrate (PETN), ethylene glycol dinitrate (EGDN), cyclotrimethylene-trinitramine (RDX) and trinitrotoluene (TNT) using commercially available substrates.
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Journal Highlight: Analysis of audio magnetic tapes with sticky shed syndrome by ATR-FTIR
Date: Apr 1, 2013
Author: spectroscopyNOW
ATR-FTIR spectroscopy was used to identify spectroscopic markers for sticky shed syndrome in audio magnetic tapes with a poly(ester urethane) binder layer that are held in Library of Congress collections.
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Journal Highlight: Direct determination of arsenic in beet sugar molasses using nickel as chemical modifier by ETAAS
Date: Apr 1, 2013
Author: spectroscopyNOW
A simple electrothermal atomic absorption spectrometric method was described for the direct determination of arsenic in sugar beet molasses samples, using nickel nitrate as the chemical modifier.
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A crying shame: Protein panel in tears classifies eye disorders
Date: Apr 1, 2013
Author: Steve Down
The common ocular conditions dry eye and meibomian gland dysfunction can be distinguished from each other using a group of five proteins present in tears, according to Spanish scientists.
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Unearthing water's deep structure: Raman revelations
Date: Apr 1, 2013
Author:
Raman X-ray scattering has been used by a German-Finnish-French collaboration to investigate the behaviour of water subjected to the kinds of high pressures and temperatures it experiences deep within the Earth.
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Venusian vortex: Infrared images of planetary sibling
Date: Apr 1, 2013
Author: David Bradley
The South Polar Vortex of the planet Venus, second planet from the Sun, shows a much more chaotic and unpredictable weather system than had previously been recognised by astronomers. A new analysis of IR images shows that the axis of rotation of this vortex is nomadic about the pole depending on the particular altitude level in the clouds at which it is observed, revealing a much more unpredictable storm and morphology than thought.
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Mouthwash: An anticancer solution
Date: Apr 1, 2013
Author: David Bradley
The active ingredients in some commercially available mouthwash solution, the bisbiguanide oral disinfectants chlorhexidine (Chlorhexamed, Chlorhexal, Periogard, Corsodyl, and Chlorohex) and alexidine (Esemdent) have been in widespread use for many years. Now, 1H,15N-HSQC NMR spectroscopy has been used in studies to investigate the structural changes these compounds can induce that lead to apoptosis in oral cancer cells.
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