UV/Vis Spectroscopy / Ezine
Green fireworks
Date: Apr 1, 2008
Author: David Bradley
Visible spectroscopy is key to the search for green fireworks, not only figuratively but from the literal position of searching for environment friendly bangs and flashes.
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Micro-Raman and fluorescence spectroscopy to study the effects of light exposure on films of egg white and egg yolk
Date: Mar 10, 2008
Author:
Non-destructive techniques were employed for the spectrofluorimetric and micro-Raman differentiation of solid films of egg yolk and egg white as a function of exposure to light. They allowed the discrimination of samples based on composition.
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Breathe easy when you're in the swim
Date: Mar 1, 2008
Author: David Bradley
US researchers are learning how to reduce the production of irritating and unhealthy volatile compounds in swimming pools by turning to ultraviolet technology to complement the use of chlorinated disinfectants.
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Isocratic LC with segmented columns and multiple detection for selectivity enhancement in the determination of explosives
Date: Feb 11, 2008
Author:
The concept of stationary-phase optimized LC was studied in the context of separation and detection aspects for the determination of explosives. A tailor-made segmented column assembly with 3 complementary RP materials enabled the separation of 14 priority target nitroaromatic explosives.
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Bird with a healthy flush
Date: Feb 1, 2008
Author: David Bradley
The bright-red throat pouch of the male great frigate bird impresses the female of the species. Now, US researchers have discovered the underlying chemistry that gives him such an attractive throat pouch and hint that the display could be more than cosmetic, acting an indicator of his health.
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Fluorescence correlation spectroscopy for probing the kinetics and mechanisms of DNA hairpin formation
Date: Jan 14, 2008
Author:
This article reviews the application of fluorescence correlation spectroscopy (FCS) and related techniques to the study of nucleic acid hairpin conformational fluctuations in free aqueous solutions.
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Animal-saving chips
Date: Jan 3, 2008
Author: David Bradley
Two new biochips could replace scores of animals currently used in toxicity testing of pharmaceutical and cosmetic products, according to US researchers. Used together the DataChip and the MetaChip can reveal the potential toxicity of chemicals and drug candidates on various organs in the human body as well as detecting putative toxic metabolites.
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Reversible photoswitching enables single-molecule fluorescence fluctuation spectroscopy at high molecular concentration
Date: Dec 8, 2007
Author:
Photoswitchable markers have been employed to enable fluorescence fluctuation spectroscopy at high molecular concentration, reversible photoswitching allowing precise control of the density of fluorescing entities.
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Nano fingerprinting
Date: Dec 1, 2007
Author: David Bradley
A new material that produces less background noise and higher contrast is being developed as a new fingerprinting powder for forensics. The highly fluorescent dye was synthesised using oleylamine combined with a perylene dianhydride compound and characterised by UV, NMR, and fluorescence spectroscopies before being loaded on to titanium dioxide nanoparticles.
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Swelling activation energy of kappa-carrageenan in its gel state: A fluorescence study
Date: Nov 8, 2007
Author:
A steady-state fluorescence technique was employed to study the swelling of kappa-carrageenan gels at various temperatures, using pyranine as a fluorescence probe.
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