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Bacterial sensor: pathogen detected with fluorescence

Date: Jan 15, 2011

Author: David Bradley

A new biosensor platform for the detection of bacterial pathogens, specifically demonstrated with E coli, has been developed based on long-range surface plasmon-enhanced fluorescence spectroscopy (LRSP-FS).

Read More thumbnail image: Bacterial sensor pathogen detected with fluorescence

Journal Highlight: Biocorrosion and uptake of titanium by human osteoclasts

Date: Jan 3, 2011

Author:

This study investigated the ability of human osteoclasts to grow on titanium and aluminum, and directly corrode the metals leading to the release of corresponding metal ions, which are believed to cause inflammatory reactions and activate osteoclastic differentiation.

Read More thumbnail image: Journal Highlight Biocorrosion and uptake of titanium by human osteoclasts

Arsenic contamination: groundwater study redux

Date: Dec 15, 2010

Author: David Bradley

Chronic arsenic poisoning is perhaps one of the most insidious environmental disaster affecting tens of millions of people on the Indian subcontinent and elsewhere. An ongoing study of the problem of arsenic-contaminated drinking water uses atomic absorption spectroscopy to underpin its analytical data.

Read More thumbnail image: Arsenic contamination groundwater study redux

Journal Highlight: Trace element analysis of rough diamond by LA-ICP-MS: A case of source discrimination?

Date: Nov 29, 2010

Author:

A novel LA-ICP-MS methodology was developed for analyzing ultra-trace element impurities in rough diamond for origin determination ("profiling") using binomial logistic regression which produced a better overall correct classification than linear discriminant analysis.

Read More thumbnail image: Journal Highlight Trace element analysis of rough diamond by LA-ICP-MS A case of source discrimination

Fishy measurements: AAS provides baseline heavy metal load

Date: Nov 15, 2010

Author: David Bradley

Samples of tinned sardines, originating from six countries have been analyzed for total arsenic, cadmium, lead and mercury content using AAS. The analysis provides a useful baseline for a foodstuff - small pelagic fish - that could become increasingly important in a possible sustainable future.

Read More thumbnail image: Fishy measurements AAS provides baseline heavy metal load

Lunar meteorite regolith breccias: An in situ study of impact melt composition using LA-ICP-MS with implications for the composition of the lunar crust

Date: Nov 1, 2010

Author:

A compositional study was carried out of the impact melt and impact melt breccia clast populations of meteorites representing regions of the lunar surface that were not visited by the US Apollo or Soviet Luna sample return missions, using in situ electron microprobe and LA-ICP-MS techniques.

Read More thumbnail image: Lunar meteorite regolith breccias An in situ study of impact melt composition using LA-ICP-MS with implications for the composition of the lunar crust

Lead extraction with green tea: AAS reveals efficacious lead detox

Date: Oct 15, 2010

Author: David Bradley

Atomic absorption spectroscopy and other techniques have been used to study the effects of green tea extract on reducing lead toxicity in laboratory rats.

Read More thumbnail image: Lead extraction with green tea AAS reveals efficacious lead detox

An assessment on metal sources by multivariate analysis and speciation of metals in soil samples using the BCR sequential extraction procedure

Date: Oct 4, 2010

Author:

The concentrations of Cr, Mn, Fe, Ni, Cu, Zn and Pb in soil samples from an agricultural area were determined by flame atomic absorption spectrometry, revealing principal influences derived from natural, airborne emissions from domestic heating and traffic.

Read More thumbnail image: An assessment on metal sources by multivariate analysis and speciation of metals in soil samples using the BCR sequential extraction procedure

A comet's tale of life on earth

Date: Sep 15, 2010

Author: David Bradley

Ab initio molecular dynamics simulations and detailed analysis hint at how conditions on the early earth might have been ripe for a cometary impact to generate small organic molecules. The study suggests that the formation of molecules akin to the simple amino acid glycine may have been viable. Follow-up spectroscopic studies may demonstrate the validity of the hypothesis.

Read More thumbnail image: A comets tale of life on earth

Application of laser ablation multicollector ICPMS for the measurement of calcium and lead isotope ratios in packaging for discriminatory purposes

Date: Sep 2, 2010

Author:

The potential of high-precision calcium and lead isotope ratio measurements using LA-MC-ICP-MS to aid distinction between four genuine and five counterfeit pharmaceutical packaging samples and further classification of counterfeit packaging samples has been evaluated.

Read More thumbnail image: Application of laser ablation multicollector ICPMS for the measurement of calcium and lead isotope ratios in packaging for discriminatory purposes
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