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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.

Read More thumbnail image: Sperm condensation FTIR used to investigate protamines

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.

Read More thumbnail image: Journal Highlight Investigation of polyvinyl chloridepolystyrene mixture miscibility Comparison of viscometry criteria with FTIR and refractive index measurements

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.

Read More thumbnail image: Organic atmospheric FTIR assesses pollution

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.

Read More thumbnail image: Breath test infrared approach detects exhaled chemicals

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.

Read More thumbnail image: Journal Highlight Silk grafting with methacrylamide A near-infrared spectroscopy study

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.

Read More thumbnail image: Conserving conservation Spectroscopic insights into fading

Journal Highlight: Pharmaceutical applications of separation of absorption and scattering in near-Infrared spectroscopy (NIRS)

Date: Jan 3, 2011

Author:

This review paper surveys the multiple techniques reported to date on the separation of NIR absorption and scattering within pharmaceutical applications, focusing on the instrumentations, mathematical approaches used to separate absorption and scattering and related pharmaceutical applications.

Read More thumbnail image: Journal Highlight Pharmaceutical applications of separation of absorption and scattering in near-Infrared spectroscopy NIRS

The pros and cons of inhaled nanoparticles: IR fluorescence reveals all

Date: Dec 1, 2010

Author: David Bradley

A new imaging system based on near-infrared fluorescent nanoparticles can provide a real-time understanding of how such tiny particles get into the airspaces within the lungs. The description of the ebb and flow of such experimental particles could be used to help medical researchers develop therapeutic agents for treating pulmonary disease.

Read More thumbnail image: The pros and cons of inhaled nanoparticles IR fluorescence reveals all

Journal Highlight: Morphology, FTIR fingerprint and survivability of encapsulated lactic bacteria in simulated gastric juice and intestinal juice

Date: Nov 29, 2010

Author:

A mixture of two lactic bacteria (Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus) was encapsulated in sodium alginate and chitosan matrices and their morphological parameters were comparatively measured.

Read More thumbnail image: Journal Highlight Morphology FTIR fingerprint and survivability of encapsulated lactic bacteria in simulated gastric juice and intestinal juice

The use of near infrared reflectance spectrometry for characterization of brown algal tissue

Date: Nov 1, 2010

Author:

NIRS calibration models were developed to measure the ecologically important tissue traits of carbon, nitrogen, and phlorotannins (secondary metabolites) in brown algae, illustrated for dried Sargassum flavicans (F. K. Mertens) C. Agardh tissue.

Read More thumbnail image: The use of near infrared reflectance spectrometry for characterization of brown algal tissue
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