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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.

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.

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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

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.

Read More thumbnail image: Forensic discrimination of dyed hair color I_ UV-Visible microspectrophotometry

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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