sergioal at bbm1.ucm.es
Wed Mar 21 15:20:42 EST 2001
what you said about the UV penetration in water is just the opposite i always
We perform UV mutations very often (as part of the practices for our students)
to show the viability reduction.. have you tried to do this kind of experiments
placing a water container between UV source and plates?. I guess the water can
acts as a UV shield, but never tried.
> There are actually quite a lot just suspended in the water column -- a
> decent oceanic average is about a million per mL! It was generally thought
> to be quite low, because the assay used was the standard plating out to see
> how many CFUs form, but at least 90% of marine bacteria will not grow in
> culture. Since UV can penetrate quite well in water (very significant in a
> least the first few metres), UV radiation accounts for a significant amount
> of bacterial damage and mortality (parallel with UV induced viral lysis).
> Interesting stuff!
> UBC Department of Biology
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