UV/Vis Spectroscopy / Ezine
Ammonia caught on film
Date: Feb 1, 2009
Author: David Bradley
A sensor based on novel electroconducting polymer composite films, characterised with UV-vis spectroscopy, reveals rapid sensitivity to ammonia on a par with conventional PANI sensors as measured by optical absorption changes.
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2-Phenanthrenyl-DNA: synthesis, pairing, and fluorescence properties
Date: Jan 12, 2009
Author:
Three 2'-phenanthrenyl-C-deoxyribonucleosides with donor, acceptor, or no substitution on the phenanthrenyl core were synthesized and incorporated into oligodeoxyribonucleotides and they were studied by UV melting analysis and fluorescence spectroscopy.
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Reversibly colourful swell gel
Date: Jan 1, 2009
Author: David Bradley
Electrochemically oxidizing and reducing an inverse polymer-gel opal causes it to swell and shrink, which alters the wavelength of the light it diffracts brightly from ultraviolet through the visible to the near infrared.
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COD Evaluation of hospital effluent by means of UV-spectral deconvolution
Date: Dec 8, 2008
Author:
A deconvolution correlation was derived between the COD values of effluent samples from the Hospital of the Federal University of Santa Maria and their integrated UV-absorbances in the 285-295 nm range.
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Battery capacity is full of holes
Date: Dec 1, 2008
Author: David Bradley
Researchers in Korea have developed a novel material for the anodein rechargeable batteries, which they say could make them much more efficient and extend significantly the length of time between charges.
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Specific detection and quantification of mycobacteria in metalworking fluids by fluorescence-based methods
Date: Nov 10, 2008
Author:
Two staining methods have been adapted and evaluated for the detection/quantification and differentiation (viable vs non-viable) of metalworking fluid-associated mycobacteria and the background bacterial flora.
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Yes, we have blue bananas!
Date: Nov 1, 2008
Author: David Bradley
Forget the so-called morning banana diet, blue is the new yellow and researchers in Europe and the US have no intention of slipping up when it comes to explaining why ripened bananas glow blue under ultraviolet light.
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Multicolor fluorescence imaging of leaves - a useful tool for visualizing systemic viral infections in plants
Date: Oct 13, 2008
Author:
The systemic infection of Nicotiana benthamiana plants with the Pepper mild mottle virus has been studied by multicolor fluorescence imaging to detect differences between two strains of the virus during the infection process and to establish a correlation between the virulence and changes induced in the host plant.
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Cosmic molecules
Date: Oct 1, 2008
Author: David Bradley
Astroscientists are using various spectroscopic techniques to root out relatively complex molecules lurking in the interstellar medium. The complexity of naphthalene, discovered in space, and corannulene, could provide new evidence of a cosmic origin for the precursor molecules of life on Earth.
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Maya blue-green pigments found in Calakmul, Mexico: a study by Raman and UV-visible spectroscopy
Date: Sep 8, 2008
Author:
A survey of the blue and green pigments used in the Early Classic and Late Classic periods in Calakmul (300-850 A.D.) has been performed using Raman and UV-visible spectroscopies to have a better understanding of their chemical composition and origin.
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