Measure E coli at O.D. 620nm

[Alex Chang]

Following my question, I got the following responses:

John R. Rebers (jrebers at nmu.edu, Northern Michigan University): The 
measurement is based on light scattering by the bacteria, rather than 
light absorption, so I suspect the A620 measurement would come pretty 
close......

Nico.Mertens at lmbl.rug.ac.be (Flemish Institute of Biotechnology): Some 
people also measure densities at 650, so I would use 620nm......

They both mentioned that standardisation is required.

Thanks very much.

Alex

Alex Chang
Pathology
University of British Columbia
achang at hivnet.ubc.ca