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Insulin boost: Definitive speculation

Date: Jan 15, 2013

Author: David Bradley

After decades of speculation about exactly how insulin interacts with cells, an international group of scientists (led by NMR pioneer Michael Weiss) has at last demonstrated a mode of action that shows how insulin binds to the cell to allow the cell to transform sugar into energy - and how the insulin molecule then changes shape as a result of this connection.

Read More thumbnail image: Insulin boost Definitive speculation

Brewing up crystal structures: Hoppy bitterness

Date: Jan 15, 2013

Author: David Bradley

During brewing, beer obtains its bitter flavour from the bitter iso-alpha acids that come from hops. In the journal Angewandte Chemie, scientists now report that they have used X-ray crystallography to determine the absolute configurations of these humulones and isohumulones, as well as several of their derivatives.

Read More thumbnail image: Brewing up crystal structures Hoppy bitterness

Journal Highlight: Laser diode thermal desorption mass spectrometry for the analysis of quinolone antibiotic residues in aquacultured seafood

Date: Jan 14, 2013

Author: spectroscopyNOW

Flumequine, oxolinic acid and nalidixic acid were extracted from catfish, shrimp and salmon and analysed by laser diode thermal desorption atmospheric pressure chemical ionization with tandem mass spectrometry.

Read More thumbnail image: Journal Highlight Laser diode thermal desorption mass spectrometry for the analysis of quinolone antibiotic residues in aquacultured seafood

Journal Highlight: First in situ optical emission spectroscopy measurements during cesium low-energy depth profiling

Date: Jan 14, 2013

Author: spectroscopyNOW

In situ optical emission spectroscopy measurements have been carried out on a time of flight SIMS instrument by measuring the light emission from the sputtered area.

Read More thumbnail image: Journal Highlight First in situ optical emission spectroscopy measurements during cesium low-energy depth profiling

Journal Highlight: X-ray imaging of leaf venation networks

Date: Jan 14, 2013

Author: spectroscopyNOW

Commercial and synchrotron X-ray imaging has been applied to leaf venation networks allowing major and minor veins to be consistently visualised at a rate of several hundred samples per day.

Read More thumbnail image: Journal Highlight X-ray imaging of leaf venation networks

Journal Highlight: Polymorphic transformation of anhydrous caffeine upon grinding and hydrostatic pressurizing analyzed by low-frequency Raman spectroscopy

Date: Jan 7, 2013

Author: spectroscopyNOW

Low-frequency Raman investigations were carried out upon pressurizing and grinding both crystalline forms of anhydrous caffeine at room temperature, leading to the detection of metastable states under stress.

Read More thumbnail image: Journal Highlight Polymorphic transformation of anhydrous caffeine upon grinding and hydrostatic pressurizing analyzed by low-frequency Raman spectroscopy

Journal Highlight: Fabrication of wideband near-infrared phosphor by stacking Sm3+-doped glass on Pr3+-doped glass phosphors

Date: Jan 7, 2013

Author: spectroscopyNOW

Near-IR glass phosphors doped with praseodymium and samarium were fabricated to give wideband luminescence that is suitable for the absorption spectrometry of agricultural products.

Read More thumbnail image: Journal Highlight Fabrication of wideband near-infrared phosphor by stacking Sm3-doped glass on Pr3-doped glass phosphors

Journal Highlight: Determination of free fatty acids in edible oils by 1H NMR spectroscopy

Date: Jan 7, 2013

Author: spectroscopyNOW

A novel proton NMR assay for the determination of free fatty acids in edible oils is a suitable alternative to the acid value method.

Read More thumbnail image: Journal Highlight Determination of free fatty acids in edible oils by 1H NMR spectroscopy

Colour coded: Bird feather development influenced by protein networks

Date: Jan 7, 2013

Author: Steve Down

The proteins involved in the development of the feathers of the pied flycatcher have been investigated by Finnish scientists who have uncovered signalling networks related to colour variation.

Read More thumbnail image: Colour coded Bird feather development influenced by protein networks

Journal Highlight: Quantitative imaging of the tissue contrast agent [Gd(DTPA)]2− in articular cartilage by laser ablation ICPMS

Date: Jan 7, 2013

Author: spectroscopyNOW

An analytical protocol is described for imaging the magnetic resonance tissue contrast agent [Gd(DTPA)]2− in articular cartilage, including sample preparation, LA-ICP-MS measurements and quantification of Gd images.

Read More thumbnail image: Journal Highlight Quantitative imaging of the tissue contrast agent GdDTPA2 in articular cartilage by laser ablation ICPMS
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