UV/Vis Spectroscopy / Ezine
Inked up: Electrophoresis spots forged documents
Date: Jul 1, 2011
Author: David Bradley
Discriminating between original documents produced using an inkjet printer is now much easier and could be used in forensic analysis to spot forgeries and counterfeit documents through the coupling of micellar electrophoretic capillary chromatography (MECC) and UV-Vis spectroscopic data.
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Journal Highlight: On site noninvasive assessment of peri-implant inflammation by optical spectroscopy
Date: Jun 13, 2011
Author:
The diagnostic potential of optical spectroscopy in peri-implant inflammation in vivo was evaluated by assessing multiple inflammatory parameters (tissue oxygenation, total tissue hemoglobin, deoxyhemoglobin, oxygenated hemoglobin and tissue edema) simultaneously.
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Hold the Maya: ancient pigments analysed
Date: Jun 1, 2011
Author: David Bradley
UV-Vis spectroscopy and various other techniques have been used to analyse the yellow pigments found in Mayan wall paintings. The compouns present are the indigoids, including isatin and dehydroindigo. The spectra together with SEM/EDX, TEM and voltammetry of microparticles show that this ancient people had the recipe for making indigo itself and converting it to Maya Blue and Maya Yellow in a stepwise reaction sequence.
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Journal Highlight: Fluorescence spectroscopy characterization of cadmium sulfide quantum dots on metal, insulator, and semiconductor substrates
Date: May 9, 2011
Author:
Fluorescence spectroscopy has been used to identify the range and maxima of excitation and emission spectra of colliodal cadmium sulfide quantum dots capped with dioctyl sulfosuccinate, deposited upon substrates of gold, mica and gallium arsenide.
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Cloudy correction: spectral change needed
Date: May 1, 2011
Author: David Bradley
Atmospheric and climate models may have overlooked the fact that exactly how clouds appear to reduce the amount of sunlight available for warming the surface of the earth depends on the wavelength being measured across the spectrum from infrared to ultraviolet. The finding could now help researchers improve climate models by factoring in the effects of cloud cover more precisely.
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Journal Highlight: Accuracy of optical spectroscopy for the detection of cervical intraepithelial neoplasia: Testing a device as an adjunct to colposcopy
Date: Apr 11, 2011
Author:
An effective classification algorithm was derived for optical spectroscopy as an adjunct to colposcopy and preliminary estimates of its accuracy were obtained for the detection of cervical intraepithelial neoplasia or worse.
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A life-extending molecule to dye for: fluorescent revelations
Date: Apr 1, 2011
Author: David Bradley
Worms live longer if protein homeostasis is maintained by adding a dye molecule to their diet, according to new study. The dye molecule Thioflavin T precludes the kind of protein misfolding that, in humans, leads to aging effects and Alzheimer's disease.
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Journal Highlight: Optical properties of modified epoxy resin with various oxime derivatives in the UV-VIS spectral region
Date: Mar 14, 2011
Author:
Optical absorbance measurements have been performed on an epoxy resin and the composites prepared by its modification with two different oxime derivatives (benzaldoxime and 2-furaldoxime) at 190-680 nm by unpolarized light and the data have been used to determine various optical properties.
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It's in the brew: coffee antioxidants formed by roasting
Date: Mar 1, 2011
Author: David Bradley
UV-Vis spectroscopy and fluorescence studies reveal that the antioxidants in coffee with the most potent assumed health benefits are formed by the roasting of beans rather than being present in the raw green beans. The results are reported in detail in the journal Food Research International.
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Journal Highlight: Two-photon fluorescence real-time imaging on the development of early mouse embryo by stages
Date: Feb 7, 2011
Author:
Early mouse embryo development from zygote to 8-cell stage compaction was observed in real-time by stages using two-photon laser scanning microscopy, optimizing several scanning parameters in different development stages.
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