IUBio GIL .. BIOSCI/Bionet News .. Biosequences .. Software .. FTP

Particles for size calibration

Jan Kreft Kreft at cardiff.ac.uk
Sat Oct 24 04:03:25 EST 1998

Dear all,

I'm recording cell growth in a flow cell and feel that calibration of the
size measurements by image analysis is important.

Most people use fluorescent latex beads for calibration of epifluorescence

I've tried latex and silica beads with a phase contrast microscope, but
they are phase-bright in contrast to the phase-dark bacteria. Since the
optical properties are so different, I don't think that the edge detection
algorithm will give the same results for bacteria and latex beads of the
same size.

Has anyone an idea of what particles of known size are about as
phase-dark as bacteria?



Dr. Jan-Ulrich Kreft			Phone +44 (0)1222 876036
Cardiff School of Biosciences		Fax   +44 (0)1222 874305
Cardiff University			E-mail Kreft at cardiff.ac.uk
PO Box 915, Cardiff CF1 3TL, UK

To reply to the group as well as to the originator, make sure that
the address biofilms at net.bio.net is included in the "To:" field.

See the BIOFILMS homepage at http://www.im.dtu.dk/biofilms for info
on how to (un)subscribe and post to the Biofilms newsgroup.

More information about the Biofilms mailing list

Send comments to us at archive@iubioarchive.bio.net