UV/Vis Spectroscopy / Ezine
UV stink: finding natural insect repellants to protect crops
Date: Nov 1, 2010
Author: David Bradley
Japanese researchers have used UV-Vis and nuclear magnetic resonance spectroscopy to help them develop a potential repellent for the invidious stink bug, an invasive pest species that has been spreading rapidly through the USA, invading homes and damaging crops.
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Cellular & molecular Ca2+ microdomains in olfactory cilia support low signaling amplification of odor transduction
Date: Oct 11, 2010
Author:
Recordings of Ca2+ changes in individual cilia with unprecedented spatial and temporal resolution, by the use of two-photon microscopy, have provided solid evidence for the existence of Ca2+ microdomains.
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Online Monitoring of Microwave-Enhanced Reactions by UV/Vis Spectroscopy
Date: Oct 5, 2010
Author:
Microwave-enhanced reactions are very fast in comparison to thermal reactions. They are often finished within a few minutes. Thus, the determination of the end point often fails, because conventional analytical methods are too slow. We developed a fast method using a UV/Vis sensor, which allows a direct online monitoring of the reaction process.
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Taking a leaf - soft matter photovoltaics
Date: Oct 1, 2010
Author: David Bradley
US researchers have demonstrated that water-gel-based solar devices can act like "artificial leaves" heralding the possibility of soft matter solar energy conversion devices.
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Optical features of the fluorophore azotobactin: Applications for iron sensing in biological fluids
Date: Sep 13, 2010
Author:
The optical and biophysical characterization was carried out for the siderophore azotobactin, which is secreted by the nitrogen-fixing bacterium Azotobacter vinelandii and exhibits fluorescence in the visible range.
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Milky melamine
Date: Sep 1, 2010
Author: David Bradley
Chinese scientists have published in the journal Talanta details of a quick and simple UV-Vis colour change technique for detecting melamine contamination in milk products. The test might help prevent future fraud using this toxic compound.
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Applying soft computing methods to fluorescence modeling of the polydimethylsiloxane/silica composites containing lanthanum
Date: Aug 9, 2010
Author:
Lanthanum was encapsulated in a complexing silica xerogel and the fluorescence of different compositions was measured to develop neural network models for estimating the fluorescence intensity based on the reaction mixture composition.
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A sniff of a nanotech insulin nasal spray
Date: Aug 1, 2010
Author: David Bradley
UV and NMR spectroscopy as well as other techniques have been used to study the slow release of insulin from water-soluble chitosan nanoparticles. The system has potential as a novel drug delivery agent for use in controlling diabetes using a nasal spray.
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Limitations in predicting dyebath exhaustion using optical spectroscopy
Date: Jul 12, 2010
Author:
The common assumptions used in models to predict dyebath concentrations and dyebath exhaustion using optical absorbance measurements that cause prediction errors are examined, especially for cases of multiple dye combinations.
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Chemical communications
Date: Jul 1, 2010
Author: David Bradley
A new system for non-electronic communication that can transmit alphanumeric information encoded as pulses of light, over intervals of hours, without needing electricity and so remaining operational even without batteries in remote, hazardous or poor locations.
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