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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.

Read More thumbnail image: Cellular  molecular Ca2 microdomains in olfactory cilia support low signaling amplification of odor transduction

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.

Read More thumbnail image: Online Monitoring of Microwave-Enhanced Reactions by UVVis Spectroscopy

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.

Read More thumbnail image: Taking a leaf - soft matter photovoltaics

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.

Read More thumbnail image: Optical features of the fluorophore azotobactin Applications for iron sensing in biological fluids

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.

Read More thumbnail image: Milky melamine

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.

Read More thumbnail image: Applying soft computing methods to fluorescence modeling of the polydimethylsiloxanesilica composites containing lanthanum

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.

Read More thumbnail image: A sniff of a nanotech insulin nasal spray

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.

Read More thumbnail image: Limitations in predicting dyebath exhaustion using optical spectroscopy

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.

Read More thumbnail image: Chemical communications

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

Read More thumbnail image: Towards an optical biopsy for the diagnosis of breast cancer in vivo by endogenous fluorescence spectroscopy
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