Archive for August, 2010

Hot Article – microfluidic device for designing cancer treatment: a step away from animal testing?

Abigail Webster, Charlotte E. Dyer, Stephen J. Haswell and John Greenman
Anal. Methods, 2010, 2, 1005-1007
DOI: 10.1039/C0AY00293C

(A) Channel schematic of the device. (B) Photograph showing the glass microdevice with attached nanoport. (C) General schematic of the assembly showing the pumping system, gassing to media reservoir and flow of the system

John Greenman and colleagues from the University of Hull, UK have developed a new microfluidic device capable of maintaining the long-term culture of viable tissue biopsies.

Culturing tissue biopsies in a microfluidic device provides a more holistic model for detecting cellular response to changes, such as drug stimuli, because the device can accurately reproduce many of the key parameters of the in vivo environment.

This new system has so far been tested with human colorectal tissue biopsies, and demonstrates that tissue samples can be cultured for more than 3 days, currently considered as long-term.

The authors proprose that the simplistic and flexible design of the current device allows real time analytical interrogation of various tissue types.  The microfluidic tissue device could then be used for a variety of diverse applications in guiding drug treatment selection in a clinical setting.

This research is timely in driving towards less animal-reliant testing in the pharmaceutical industry and more personalised care in the medical arena.

Read the article for free in the latest issue of Analytical Methods.

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Brett Paull wins ion chromatography award!

We are delighted to see that Anaytical Methods Editor-in-Chief, Brett Paull will be presented with the 2010 IC Achievement Award, at the upcoming International Ion Chromatography Symposium (IICS 2010) in Cincinnati. Well done Brett!

Brett’s award lecture will be given on Monday 20th September entitled “Polymer Monolithic Phases: The Future or a Fading Novelty”.

Pick up a complimentary copy of Analytical Methods at the Symposium or access the latest issue online for free!

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Greenhouse gas detection

From next year, the USA’s Environmental Protection Agency will require operators of large carbon-emitting operations to submit annual emissions reports for carbon dioxide, methane, nitrous oxide, and other greenhouse gases.  These firms will require analytical tools to monitor their emissions and to create estimates based on energy consumption.  But they face a dilemma on how they will gather the data.  Read the full article at Chemical & Engineering News.

Equally important are the tools to determine levels of harmful gases in the general environment.  Published online in Analytical Methods, Jason Horn and colleagues use Clark-type amperometric gas sensing methodology to investigate hydrogen sulfide in the air:

Amperometric measurement of gaseous hydrogen sulfide via a Clark-type approach
Jason J. Horn, Tom Mccreedy and Jay Wadhawan
Anal. Methods, 2010, Advance Article
DOI: 10.1039/C0AY00338G

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Organophosphate detection made easy

Calcium chloride and ammonium hydroxide precipitation removes the inorganic phosphate

Enhancing determination of organophosphate species in high inorganic phosphate matrices: application to nerve agent degradation products
Yaofang Zhang, Kevin M. Kubachka and Joseph A. Caruso
Analytical Methods, 2010, DOI: 10.1039/c0ay00230e

Joseph Caruso and colleagues at the University of Cincinnati have developed a precipitation method for the removal of inorganic phosphates from samples to allow more effective identification of organophosphates by ICP-MS.

High concentrations of inorganic phosphates were successfully removed from apple juice and cola drink, leaving the organophosphates intact.  In this study, nerve agent degradation products were analysed, as they have the potential to contaminate food and environmental systems after their initial formation.

Caruso’s results indicate that this method could be suitable for more complex matrices containing relatively high levels of inorganic phosphate.

Access the article for free via the Analytical Methods homepage.

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Analytical Methods Poster Prize

Congratulations to Sangeeta Tanna from De Montfort University, who was awarded an Analytical Methods poster prize at the recent Analytical Research Forum held at Loughborough University.

Sangeeta’s poster described her work on a dried blood spot sampling system which enables the measurement and monitoring of drug levels in newborn babies, to inform future drug doses. This was tested on captopril, a drug used for the treatment of heart failure. Well done Sangeeta!

Why not submit your article to Analytical Methods today!

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