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
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.
> > 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,