A way of measuring bacterial activity? Ideas?

marty avicat at aol.com
Sat Aug 18 15:23:54 EST 2001

You might check the growth condition required for some algae or 
blue-green algae that produce chlorophyl. I think there are some 
photosynthetic bacteria that may also prove easy to grow. I don't think 
all of them are exceedingly hard to grow. Provide ample light and you 
can probably measure pigment production in the visible light range on 
your spectrophotometer.

In article <MPG.15e08cb6d4abe980989696 at nntp.mindspring.com>, 
botrytis at mindspring.com (David Slomczynski) wrote:

> In article <3b761bcb at dnews.tpgi.com.au>, "Halogen" <halo &anti spam& 
> gen at tpg.com.au> says...
> > Basically I have an undergraduate project to test this new idea for a
> > bioreactor.
> What about using tetrazolium dyes? They are used commonly to test for 
> metabolic activity.
> botrytis
> > 
> > Does anyone know a simple way of quantitatively measuring a product 
> > produced
> > by bacteria without resorting to using equipment like HPLC?
> > 
> > I've tried measuring H2S produced by sulphate reducing bacteria, but 
> > this is
> > difficult to work out since it's only practical to measure it as a gas 
> > and a
> > lot is staying dissolved in the liquid in the bioreactor.
> > I've tried using pigment produced by psuedomonas fluorescens, but this
> > didn't work due to this bacteria only producing pigment under certain
> > conditions.
> > 
> > Any other ideas?  I'm really looking for a bacteria I can easy assay a
> > metabolic product of using a colour reaction and a spectrophotometer, 
> > but I
> > can't seem to find a way to do this anywhere.
> > 
> > Thanks,
> > 
> > 
> > 
> > 
> > 
> >

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