Cheap (household) alternative to proto-slow??

Dick Pratt PQQ at
Mon Apr 4 19:25:31 EST 1994

Two other slowing agents are available (cheap) plus one that is more expensive.
Proto-slow is just methylcellulose (wall paper paste).  You could buy a
lifetime supply at most hardware stores.  Dilute heavy metals are pretty good,
too, but they do eventually kill the cells (a message for teaching).  We
use 1% nickel sulfate, and lower dilutions would probably also work.  A
product called DETAIN is also available.  It is a visco-elastic polymer.
Works well but is light sensitive.

J.R. (Dick) Pratt            pqq at (internet)
7 Ferguson Bldg.             FAX: 814/865-3725
Penn State                   Voice: 814/865-6942
University Park, PA 16802

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