cheap probe to detect log growth

Peter C. Giardina, Ph.D. pgiardin at blue.weeg.uiowa.edu
Sat Dec 2 11:44:56 EST 2000



On Sat, 2 Dec 2000, Michael Witty wrote:

> Dear All, I am convinced there must be a better way of finding the log
> phase of growth (for example of a conical flask of E. coli) than
> repeatedly taking 1ml samples and putting them in a spec.
> 
>      My ambition is to have a cheap detector with a probe consisting of a
> light source and photoresistor which can be dangled into my flask and
> record data continuously.
> 
>      But I am a biologist not an electrical engineer.  Does anyone share
> my ambition?  Or know how I can make this happen?  Mike.
> 
> 

Hmmm... Not sure how you'd sterilize the thing by a convenient method
without destroying it. And some folks have to shake their cultures pretty
hard.  It would have to be one tough little device.


Peter



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