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Narrow view of photosynthesis

Date: Feb 1, 2010

Author: David Bradley

Fluorescence line-narrowing and resonance Raman properties of various chlorophyll molecules have been measured in organic solvents. The work sheds new light on one of life's most important biochemical processes - photosynthesis - and might one day allow scientists to take another step closer to emulating the reactions to trap solar energy.

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Lichen colonization of an active volcanic environment: a Raman spectroscopic study of extremophile biomolecular protective strategies

Date: Feb 1, 2010

Author:

The Raman spectra of 16 lichen specimens from eight genera growing on basaltic lava and wood substrates on new lava fields on the Kilauea volcano, Kona, Hawaii, have been analysed in terms of the pigments and biomolecules produced in this extreme environment.

Read More thumbnail image: Lichen colonization of an active volcanic environment a Raman spectroscopic study of extremophile biomolecular protective strategies

Comparison of near IR laser excitation wavelengths and its influence on the interrogation of seized drugs-of-abuse by Raman spectroscopy

Date: Jan 4, 2010

Author:

The effect of near infrared wavelengths, 785 nm, using both benchtop and portable instrumentation and benchtop 1064 nm on the Raman spectra of seized drugs-of-abuse were compared.

Read More thumbnail image: Comparison of near IR laser excitation wavelengths and its influence on the interrogation of seized drugs-of-abuse by Raman spectroscopy

Raman targets bacterial cell walls

Date: Jan 1, 2010

Author: David Bradley

Bacterial cell walls are a key target for antibiotics but they can change structure during reproduction. Now, Raman spectroscopy and atomic force microscopy have been used to home in on these changes in a bacterium and so provide important clues about the biochemical changes that occur at the cellular level.

Read More thumbnail image: Raman targets bacterial cell walls

Rapid outdoor non-destructive detection of organic minerals using a portable Raman spectrometer

Date: Dec 2, 2009

Author:

Raman spectral signatures have been obtained for a series of organic minerals using a compact portable Raman instrument, allowing organic minerals to be used as biomarkers for future exobiological missions such as the ESA mission to Mars.

Read More thumbnail image: Rapid outdoor non-destructive detection of organic minerals using a portable Raman spectrometer

Oliiiive!

Date: Dec 1, 2009

Author: David Bradley

Nutritionally useful carotenoids and phenolic compounds increase as olives grow but then decrease as they ripen. Now, researchers have demonstrated that monitoring two Raman bands can help growers keep an eye on these changes and so optimise their product for olive oil production.

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Performing tip-enhanced Raman spectroscopy in liquids

Date: Nov 2, 2009

Author:

Tip-enhanced Raman spectroscopy has been demonstrated for the first time with both the tip and the sample completely immersed in water, with a proof-of-principle study on thiophenolate self-assembled monolayers on gold surfaces.

Read More thumbnail image: Performing tip-enhanced Raman spectroscopy in liquids

Organic ferroelectrics

Date: Nov 1, 2009

Author: David Bradley

Raman spectroscopy touches on the properties of an organic ionic material, only the second of its type to be synthesised, that apparently undergoes a phase transition at low temperature making it ferroelectric.

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Depth profiling of Stratum corneum hydration in vivo: a comparison between conductance and confocal Raman spectroscopic measurements

Date: Oct 5, 2009

Author:

The high-frequency electrical conductance of tape-stripped human skin in vivo can be used to evaluate the hydration profile of Stratum corneum (SC). The conductances correlate well with their water content, as demonstrated by independent confocal Raman spectroscopic measurements.

Read More thumbnail image: Depth profiling of Stratum corneum hydration in vivo a comparison between conductance and confocal Raman spectroscopic measurements

Imaging a semiconductor sandwich

Date: Oct 1, 2009

Author: David Bradley

A technological mash-up between graphene and the semiconductor gallium arsenide as characterised by optical microscopy and Raman spectroscopy and other techniques could pave the way to hybrid electronics devices that bridge the gap between current silicon circuitry and future molecular electronics.

Read More thumbnail image: Imaging a semiconductor sandwich
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