UV/Vis Spectroscopy / Ezine
Super stellar cocktail
Date: Aug 1, 2007
Author: David Bradley
A cocktail of chemicals is venting from the oxygen-rich region surrounding one of the most sensitive environmental atmospheres known. Radio astronomers have detected small molecules and compounds, including common salt, hydrogen isocyanide, phosphorus nitride, and protonated carbon monoxide, in the environment around a supergiant star.
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Analysis of non-anthocyanin phenols in wine by HPLC with UV and fluorescence detection
Date: Jul 9, 2007
Author:
A simple and rapid HPLC method with UV and fluorescence detection is reported for the separation of ten phenolic compounds including gallic acid, catechin, epicatechin, caffeic acid, coumaric, trans-piceid, cis-piceid, trans-resveratrol, cis-resveratrol and quercetin, in red wine.
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Superalloy-strong-resistant-ultravis-analysis
Date: Jul 1, 2007
Author: David Bradley
A variety of techniques, such as ultraviolet-visible spectroscopy and high-resolution transmission electron microscopy are being used by researchers at Sandia National Laboratory to investigate how superalloys form. Their work could lead to new approaches to the synthesis of novel materials with as yet unknown technological applications.
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An optical thermometer based on the delayed fluorescence of C70
Date: Jun 11, 2007
Author:
A sensitive and broad-ranged optical thermometer, based on the thermally activated delayed fluorescence of fullerene C70, consists of C70 molecularly dispersed in a polymer film and outperforms known standards.
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Iron soccerball unstitched
Date: Jun 1, 2007
Author: David Bradley
A range of techniques including UV/Vis were used to characterise a new soccerball molybdenum capsule. The new capsules can be opened and closed by swapping their iron linkers for lanthanides.
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Fluorescence spectroscopy of an in vitro model of human cervical precancer identifies neoplastic phenotype
Date: May 7, 2007
Author:
Organotypic epithelial raft culture were used as an in vitro model of cervical tissue to analyse changes in the fluorescence properties of surface squamous epithelium that are associated with the development of neoplastic disease.
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Sunshine, it's no gas
Date: May 1, 2007
Author: David Bradley
Sending astronauts to reignite the Sun, the premise of sci-fi feature Sunshine, is the least of our problems when we are currently faced with global warming, global terrorism, and global economic collapse. Nevertheless, astronomers are concerned about recent findings regarding the hot gas surrounding our star and its stellar neighbours. Put simply they cannot find these hot gases.
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Probing rotation dynamics of biomolecules using polarization based fluorescence microscopy
Date: Apr 9, 2007
Author:
Fluorescence polarization microscopy based on a two-photon fluorescence microscope was used to characterize the rotation dynamics and interactions of biomolecules.
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A pivotal moment for molecular scissors
Date: Apr 1, 2007
Author: David Bradley
Circular dichroism and absorption spectroscopy studies reveal the properties of a pair of molecular scissors that can open and close in analogy to their macroscopic counterparts. The scissoring action occurs in response to ultraviolet light input; the first demonstration of such control. The molecular-scale scissors could be used to manipulate other smaller molecules or as drug delivery agent or to control proteins.
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Data processing in metabolic fingerprinting by CE-UV: Application to urine samples from autistic children
Date: Mar 19, 2007
Author:
Although no biomarkers for autism could be determined in this paper, the general approach presented could also be applied to the processing of other data collected by electrophoresis with UV-Vis detection. Read more...
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