Discover Seattle!

General Category => Discover Seattle! => Topic started by: TehBorken on Mar 14 06 07:01

Title: Cocaine Biosensor
Post by: TehBorken on Mar 14 06 07:01
The MIT Technology review reports that a lab at UC Santa Barbara has [a href=",306,p1.html"]created a cocaine-sensitive biosensor [/a]by attaching a special type of DNA called an aptamer to a gold electrode. When cocaine is present, the aptamer tightly 'grabs' onto a cocaine molecule and bends so that a metal tag can touch the gold surface, which completes a circuit and triggers the detector.

[a href=",306,p1.html"],306,p1.html[/a]
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(When asked if the device could register false positives, the researchers responded, "She don't lie, she don't lie, she don't lie; cocaine!")