Pesticide Screening Using a CD Player and CDs.

Byoliveridley

Who said CDs were dead, this is, hands down, the coolest paper on screening techniques I have seen in a while. I haven’t seen the rest of the paper, not Open Access, of course, but the abstract does make it sound cool.

Microimmunoanalysis on Standard Compact Discs To Determine Low Abundant Compounds

“High-density competitive indirect microimmunoassays were performed in both sides of compact discs by direct absorption of immunoreagents on polycarbonate surface, using gold- or enzyme-labeled immunoglobulins as tracers for displaying the immunoreaction. The operational principle is based on the use of a low-reflectivity compact disc as analytical platform that allows the reflection/transmission (30/70%) of the CD reader laser beam ( 780 nm). The reflected light is used to scan the disc track keeping it in movement. The transmitted light is detected by a planar photodiode integrated on the CD drive. The variation of the optical transmission of the light caused by the immunoreaction products is related to the sample concentration. As a proof of concept, low abundant compounds, commonly used as pesticides, were detected in a 60-min total assay time, with a limit of detection ranging from 0.02 to 0.62 ug/L for 2,4,5-TP, chlorpyriphos, and metolachlor. The obtained results show the enormous prospective of compact discs in combination with CD players for multiresidue and drug discovery applications.”

Why are techniques like these important in the world of environmental analysis? Because they change the paradigm from laboratory based techniques to field based analysis. You don’t have to take a bunch of samples, spend a lot of time and money shipping them to a lab and waiting for the results. You can pop your samples into a CD player and one hour later (less than a 74 minute listening time on a CD!), you’ll have results.

Awesome stuff, I’d love to see it in action, or even try to replicate the work. It looks like you have to make some modifications to the player to make it work, but hey, there are millions of CD players that are going to be obsoleted in the next few years.

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    Still, the region’s leaders know energy and money, having built their wealth on oil. They understand that oil is a finite resource, vulnerable to competition from new energy sources.

    So even as President-elect Barack Obama talks about promoting green jobs as America’s route out of recession, gulf states, including the emirates, Qatar and Saudi Arabia, are making a concerted push to become the Silicon Valley of alternative energy.

    They are aggressively pouring billions of dollars made in the oil fields into new green technologies. They are establishing billion-dollar clean-technology investment funds. And they are putting millions of dollars behind research projects at universities from California to Boston to London, and setting up green research parks at home.

    Meanwhile, we in Canada are pushing hard to completely ignore environmental concerns as we push to expand the incredibly dirty tar sands. I read an interesting New York Times article recently, summarizing the issues with this dirty oil. Of course, the CO2 emissions, and the incredibly nasty effects of mining, water pollution, etc. are well documented. One fact stuck in my head – The cost to replace one tire in one of the earth moving vehicles is $60,000. What a wasteful enterprise on such a grand scale, whose only purpose is to carry on business as usual when business as usual is going to result in catastrophic climate change in the not so distant future.

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    This is a new cross-border effort by a whole host of Canadian and US environmental big guns including Greenpeace, Environment Defence, the Dogwood Initiative, etc. aimed at lobbying Obama on the Oil (Tar) sands of Alberta.

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    I do not believe this campaign will make any difference whatsoever, Obama is in Canada for something like 3 hours, and presumably will have other things to talk about.

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    These are the people who will be deciding who gets science money in Canada.

    This has probably been the most unscientific administrations in Canada’s recent history.

    I think it is time to throw the bums out, it’s time for another election!

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    Gee, I wonder why??

    Blogged with Flock

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