Re[2]: Clumping, Tetko Mesh

Susan D. DEMAGGIO (SUEDEMAG@uci.edu)
Wed, 29 Nov 95 15:50:12 PST

Here is a short cut I learned at Los Alamos so thanks to them for the
idea. Cut the large blue pipet tips off about 1/4 inch up or so - far
enough to give a fairly large area open on the end. Cut a piece of
nylon filter 3 or 4 inches square. Heat a hot plate hot enough to
melt the plastic pipet tip edges and press them onto the nylon. When
thoroughly cool and attached all the way around, trim off the excess
nylon mesh. You can make LOTs from that piece of nylon. They can be
cleaned and reused by flushing the opposite direction with enzyme
cleaner. I'm not sure about sterilizing them - Alcohol (or gas) is
probably the only way.

Sue DeMaggio

______________________________ Reply Separator _________________________________
Subject: Re: Clumping, Tetko Mesh
Author: IFORW@delphi.com at biosmtp
Date: 11/29/95 3:29 PM

> Can you post a phone number and address for Tetko please? Thanks
>
> Dave Gebhard
> Director FACS/ Oligonucelotide Synthesis Facilities
> Albert Einstein College of Medicine
> 1300 Morris Park Avenue
> Bronx, New York 10461
> 718-430-2724/ 3573

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* ***********

Here is some more information about nylon mesh from Tetko, Inc. for all of
you on the mailing list (see my previous posting about use of nylon mesh to
avoid problems with clumping). Tetko sells nylon mesh that is useful for
filtering cell suspensions prepared from various tissues before the cells
are stained for flow cytometry. A filtering step can remove troublesome
large cell clumps that may later clog up the plumbing of your flow
cytometer.

Tetko, Inc.
111 Calumet Street
Depew, NY 14043
Phone Number: 716-683-4050

The nylon mesh I have used for filtering suspensions of mouse thymus,
spleen, lymph nodes, and epidermis is #3-85/44. The 85 is the average pore
size of the mesh in microns. I cut squares of the mesh that measure about
3 cm on each side, fold the squares into a cone shape, and tape these mesh
cones into small plastic funnels (these can be autoclaved if you are doing
sterile work). The funnels are put on top of conical tubes and cells are
pipetted through the mesh to remove the clumps. The cost for this nylon
mesh is $34.50 per yard of a 40-42 inch wide roll.

==========================================================================
Ifor Williams, M.D., Ph.D. | E-mail #1: iforw@delphi.com
Assistant Professor | E-mail #2: irwilliams@bics.bwh.harvard.edu
Division of Dermatology | Phone: 617-278-0307
Brigham and Women's Hospital | Fax: 617-278-0305
75 Francis St. |
Boston, MA 02115 |
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CD ROM Vol 2 was produced by staff at the Purdue University Cytometry Laboratories and distributed free of charge as an educational service to the cytometry community. If you have any comments please direct them to Dr. J. Paul Robinson, Professor & Director, PUCL, Purdue University, West Lafayette, IN 47907. Phone:(317) 494-0757; FAX (317) 494-0517; Web http://www.cyto.purdue.edu EMAIL robinson@flowcyt.cyto.purdue.edu