On 15 Nov 1995 neale at mbcf.stjude.org wrote:
> I did not see the original posting. so forgive the reply to a reply.
>> When I was in grad school we used the Klett "spectrophotometer". It measured
> light scatter at different wavelengths and was used to follow the growth of
> microbial cultures eg bacterial (or mycoplasma in my case). You grew your
> culture in a side arm flask and then inserted the side arm into the Klett
> machine to take a reading. That way you could follow the growth of your culture
> without having to open the flask or lose culture volume.
>> As I remember, the unit was calibrated to be 500 Klett units per 1 O.D.
That could be true if you are measuring REAL optical density. But in a
culture, you are not measuring optical density, so that conversion is not
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