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rssShrinking the proton: Laser scan
Date: Feb 15, 2013
Author: David Bradley
An international research team has confirmed the surprisingly small radius of the proton using laser spectroscopy on muonic hydrogen. The new results fuel the debate as to whether the discrepancies observed can be explained by standard physics, for example an incomplete understanding of the systematic errors that are inherent to all measurements, or whether they are due to new physics, or a higher complexity than previously assumed for the structure of the proton.
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Journal Highlight: Thousand-fold enhancement of single-molecule fluorescence near a single gold nanorod
Date: Feb 11, 2013
Author: spectroscopyNOW
Large enhancements of single-molecule fluorescence up to 1100 times have been achieved using synthesised gold nanorods by selecting a dye with its absorption and emission very close to the surface plasmon resonance of the nanorods.
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Journal Highlight: Comparison of plain vertebral X-ray and dual-energy X-ray absorptiometry for the identification of older women for fracture prevention in primary care
Date: Feb 11, 2013
Author: spectroscopyNOW
The effects of the amended dual-energy X-ray absorptiometry diagnostic cut-off in the Australian Pharmaceutical Benefits Scheme for primary fracture prevention therapy with alendronate on case finding and cost have been assessed in older women.
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Journal Highlight: Early synthetic dyes – a challenge for tandem mass spectrometry
Date: Feb 11, 2013
Author: spectroscopyNOW
Early yellow synthetic dyes from silk fibres taken from the 1930 spring colour palette of the Lyon Dyers’ Guild (La Chambre Syndicale des Teinturiers) have been identified, primarily by electrospray MS/MS.
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Journal Highlight: How to tickle spins with a Fourier Transform NMR spectrometer
Date: Feb 4, 2013
Author: spectroscopyNOW
Spin tickling can readily be achieved in homonuclear systems with Fourier transform NMR spectrometers by applying short pulses in the intervals between the sampling points.
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Journal Highlight: Ion implanted inconel alloy – SIMS and GDMS depth profile analysis
Date: Feb 4, 2013
Author: spectroscopyNOW
SIMS and GDMS have been applied to the depth profile analysis of ion-implanted nickel alloy inconel 600, giving similar results for implanted N, Ti and Y.
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Journal Highlight: Imaging of internal stress around a mineral inclusion in a sapphire crystal: application of micro-Raman and photoluminescence spectroscopy
Date: Feb 4, 2013
Author: spectroscopyNOW
A micro-Raman and photoluminescence imaging technique was developed for visualizing the internal stress fields in a sapphire crystal and applied to an Australian sapphire gemstone with a zircon inclusion.
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Journal Highlight: Could infrared spectroscopy identify melamine-related stone using melamine-contained mixture as a reference?
Date: Feb 4, 2013
Author: spectroscopyNOW
The infrared spectra of dry melamine-containing mixtures are different from those of melamine-containing stones formed in urine, so cannot be used for reference purposes.
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Tipping point: Wooden toothpicks for ambient ionisation of illegal drugs
Date: Feb 1, 2013
Author: Steve Down
Ketamine and its major metabolite norketamine have been measured in urine and oral fluid by ambient electrospray mass spectrometry using a wooden toothpick as the sample holder.
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No slipping up: Banana proteome unpeeled using peptide libraries
Date: Feb 1, 2013
Author: Steve Down
An in-depth proteome study of banana fruit using combinatorial peptide ligand libraries to isolate the proteins from the sugar-rich pulp has identified more than 1100 proteins.
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