Too true Alice, Many's the time I've traipsed back to the the punters lab to find discarded supernatant swimming with cells when they've been piqued at the "poor recovery" by the sorter. Most people seem to check what they put into a centrifuge, but seldom what they get out, and they always seem to use the most gentle spin cycle to protect their cells (from hitting the bottom of the tube). Ray At 4:28 pm -0400 23/10/97, Alice L. Givan wrote: >Aside from the problems mentioned about the ways that a cytometer can slurp up >cells, there is always the possibility (probability?) that the user has >counted cells with a hemocytometer *BEFORE* staining and washing and >resuspending. It's amazing how many cells get lossed during the staining >procedure, especially when you start out with low numbers. Before you blame >the cytometer, try counting the cells again after staining. (This also helps >in assigning blame for low cell recovery after sorting!) > >Alice > >Alice L. Givan >Englert Cell Analysis Laboratory >Dartmouth Medical School >Lebanon, New Hampshire >NH 03756 USA >tel 603-650-7661 >fax 603-650-6130 >e-mail givan@dartmouth.edu Ray Hicks ________________________________________________________________________ |University of Cambridge |Tel 01223 330149 | |Department of Medicine |Fax 01223 336846 | |Level 5, Addenbrookes Hospital |e-mail <rh208@cus.cam.ac.uk> | |Hills Road Cambridge |Web http://facsmac.med.cam.ac.uk | |CB2 |ftp server ftp://131.111.80.78 | |UK | | |_________________________________|_____________________________________|
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