Infrared Spectroscopy / Ezine
Slipped disc gel: microbial remedy
Date: Jun 1, 2011
Author: David Bradley
Viable nucleus pulposus (NP) implant materials for repairing damaged intervertebral discs, comprising novel hydrogels, have been developed and studied using the techniques of Fourier-tranform infrared and nuclear magnetic resonance spectroscopy.
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Journal Highlight: Infrared spectroscopy and integrated molar absorptivity of C60 and C70 fullerenes at extreme temperatures
Date: May 2, 2011
Author:
The temperature dependences of the wavelength shift and integrated molar absorptivity of the infrared bands of the C60 and C70 fullerenes were determined and extrapolated to derive the values at absolute zero temperature.
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FOG overflow: IR clues to drainage problems
Date: May 1, 2011
Author: David Bradley
It is perhaps no real surprise to any chemist who has unblocked a drain clogged with white lardy deposits, but new FTIR spectroscopic evidence confirms that degraded fat, oil and grease (FOG) reacts with calcium compounds in the murky water of drains to form hardened deposits that are, to all intents and purposes, composed of soap, leading to blockages and overflows.
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Journal Highlight: Discrimination of seasonality in cheeses by near-infrared technology
Date: Apr 4, 2011
Author:
Rapid prediction of the fat content of cheeses and the seasonal origin (winter or summer) of milk was achieved using near-infrared spectroscopy without previous destruction or treatment of samples.
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Sperm condensation: FTIR used to investigate protamines
Date: Apr 1, 2011
Author: David Bradley
Protamines are small basic proteins that condense the genetic material, the DNA, in mature sperm. They are richin the amino acid arginine whose residues are distributed in a number of stretches separated by neutral amino acids. Researchers have used Fourier transform infrared spectroscopy to investigate, for the first time, the secondary structure of protamines in sperm nuclei.
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Journal Highlight: Investigation of poly(vinyl chloride)/polystyrene mixture miscibility: Comparison of viscometry criteria with FTIR and refractive index measurements
Date: Mar 7, 2011
Author:
The refractive index and FTIR spectrum of a poly(vinyl chloride)/polystyrene mixture were measured and compared with published results obtained by the viscosity method.
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Organic atmospheric: FTIR assesses pollution
Date: Mar 1, 2011
Author: David Bradley
Fourier transform infrared spectroscopy has been used to analyse submicron particles from 14 regions in North America, Asia, South America, and Europe. The measurements were used to identify characteristic organic functional group compositions of fuel combustion, terrestrial vegetation, and ocean bubble bursting sources. The information helps account for more than a third of organic mass in the atmosphere.
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Breath test: infrared approach detects exhaled chemicals
Date: Feb 1, 2011
Author: David Bradley
Trace analytes can be detected in the breath using near infrared Fourier transform broadband cavity enhanced absorption spectroscopy. This opens up a whole new area of medical diagnostics and health research.
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Journal Highlight: Silk grafting with methacrylamide: A near-infrared spectroscopy study
Date: Jan 31, 2011
Author:
Near infrared (NIR) spectroscopy was used for the quantitative determination of methacrylamide (MAA) in silk yarns and in exhaust baths after grafting. A correlation between the grafting yield and NIR spectra of MAA grafted yarns was obtained.
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Conserving conservation: Spectroscopic insights into fading
Date: Jan 5, 2011
Author: David Bradley
Improving storage and exposure conditions in conservation of artefacts is crucial to suppressing the fading and degradation of dyes and other components of paintings. Researchers have now used several analytical techniques, including attenuated total reflectance infrared spectroscopy, Raman spectroscopy, reflectance UV-Vis spectroscopy, X-ray fluorescence spectroscopy and optical microscopy, to investigate different conditions on common pigments.
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