Raman Spectroscopy / Ezine
Rosy discolouration by another name
Date: Nov 1, 2007
Author: David Bradley
Italian researchers have used Raman spectroscopy and genetic fingerprinting to determine whether the red pigments produced by the bacterium Rubrobacter radiotolerans, so-called bacterioruberin carotenoids, are the same pigments responsible for colour changes in ancient frescoes in ancient paintings from the Crypt of the Original Sin, in Matera, Italy.
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Raman spectroscopy of protein pharmaceuticals
Date: Nov 1, 2007
Author:
Various Raman techniques used for protein pharmaceutical studies are reviewed. Novel Raman markers of proteins discovered from fundamental studies of protein complexes are examined along with established Raman spectra and structure correlations.
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Aging effects on black human hair by Raman spectroscopy
Date: Oct 1, 2007
Author:
Internal structure changes caused by aging in virgin black human hair keratin fibres of Japanese women were investigated at various depths by Raman spectroscopy.
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Virgin Japanese hair
Date: Oct 1, 2007
Author: David Bradley
Scientists in Japan have developed a Raman spectroscopy technique that allows them to investigate the internal structure of even very dark hair for the first time. The work could have implications for understanding how hair changes as we grow older and may even have medical diagnostics applications.
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Reference database of Raman spectra of biological molecules
Date: Sep 3, 2007
Author:
A collection of Raman spectra of biomolecules is presented that can serve as references for the interpretation of Raman spectra of biological materials. It includes the most important components present in a cell.
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Diamonds out of Hades
Date: Sep 1, 2007
Author: David Bradley
Raman spectroscopy could turn the history of the early Earth upside down and hint that conditions were suitable for life as little as 250 million years after its formation, pushing back the so-called Hadean era several hundred million years.
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SERS of plant material
Date: Aug 6, 2007
Author:
Colloidal gold and silver were formed by the spontaneous reduction of metal salts by plant tissue, enabling surface-enhanced Raman spectra (SERS) measurements, yielding specific vibrational signatures for the plant components in the proximity of the colloids.
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Mice Slice
Date: Aug 1, 2007
Author: David Bradley
A new methodology for fibre-optic Raman mapping and FTIR imaging of secondary cancer cells, metastases, in mouse brains has been developed by researchers in Germany. The technique can be used on samples thicker than 50 micrometres and could be equally applicable to other diseases and to metabolic fingerprinting.
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Raman scattering of nanoporous semiconductors
Date: Jul 2, 2007
Author:
The application of Raman scattering for characterizing porous semiconductors is reviewed, with examples of porous layers on III-V semiconductors in which Raman scattering is used to study charge carrier depletion.
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CARS and constriction restriction
Date: Jul 1, 2007
Author: David Bradley
Coherent anti-Stokes Raman scattering microscopy has been used to evaluate a new approach to the controlled released of the drug paclitaxel used in preventing a re-narrowing of blood vessels following insertion of a coated-stent to treat the initial condition.
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