UV/Vis Spectroscopy / Ezine
Towards an optical biopsy for the diagnosis of breast cancer in vivo by endogenous fluorescence spectroscopy
Date: Jun 14, 2010
Author:
In order to reduce the number of invasive biopsy procedures, a portable clinical system was designed based upon the excitation of endogenous fluorescence in vivo at 405 nm via a fiber-optics probe inside a disposable needle of small diameter
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New chemical species isolated
Date: Jun 1, 2010
Author: David Bradley
Like a previously unknown species emerging into the glare of camera flashlights from the tropical undergrowth or crawling out from under a deep ocean rock, a seemingly simple small molecule, an organosulfur compound called oxathiirane, has been synthesised at long last and reveals itself under ultraviolet spectroscopic inspection.
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Protein shapeshifter
Date: May 15, 2010
Author: David Bradley
British researchers have created a molecular track to emulate this process and added a small molecule that can shuffle back and forth like a courier on the track.
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Glyphosate uncouples gas exchange and chlorophyll fluorescence
Date: May 10, 2010
Author:
Studies on CO2 assimilation, conductance and chlorophyll fluorescence in barley (Hordeum vulgare L.) exposed to increasing doses of glyphosate suggest that gas-exchange parameters are more sensitive biomarkers for glyphosate toxicity than chlorophyll fluorescence.
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Quantum dots boost anticancer drug
Date: May 1, 2010
Author: David Bradley
Quantum dots (QDs) have received significant attention in biological and biomedical fields. Now, UV-Vis spectroscopy and other techniques have been used to investigate their utility in enhancing the activity of the anticancer agent daunorubicin (DNR) in treating leukaemia cells.
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Forensic discrimination of dyed hair color: I. UV-Visible microspectrophotometry
Date: Apr 12, 2010
Author:
Hair samples treated with 55 different red hair dyes were analyzed using UV-visible microspectrophotometry between 200 and 700 nm. The contribution of the hair substrate is predominantly observed at 300-400 nm while the dye peak is evident at 425-550 nm.
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Liquid light molecules
Date: Apr 1, 2010
Author: David Bradley
With suitable chemical modification, unprecedented room temperature liquid porphyrins could be used as optical limiters in optoelectronics and spectroscopic instrumentation, according to researchers in Poland.
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Increase in CD230 (cellular prion protein) fluorescence on blood lymphocytes in BSE-infected nonhuman primates
Date: Mar 8, 2010
Author:
Simian cellular prion protein epitopes were mapped by flow cytometry using monoclonal antibodies. Blood lymphocytes from asymptomatically infected as well as diseased macaques were characterized by increased CD230 fluorescence.
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Sunscreen spies
Date: Mar 1, 2010
Author: David Bradley
Sunscreen and boron can work together to make a compound that changes colour when touched under ultraviolet light. The compound changes from blue-green to yellow with the gentlest of rubs and then reverts quickly to blue-green when gently warmed, although the process is reversible at room temperature.
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Electrical and optical properties of polyaniline with a weblike morphology
Date: Feb 8, 2010
Author:
A method was described for the preparation of nanostructured polyaniline via the oxidation polymerization of aniline hydrochloride in the presence of an anionic surfactant.
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