red fluorescent beads

Stefan Niehren (ni@aguas1.uphys.uni-heidelberg.de)
Tue, 19 Sep 1995 11:17:27 +0200 (METDST)

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I am searching for red fluorescent beads excitable at 623-630 nm with
diameters about 1 micron. I want to use such beads as tracers in
groundwater. If you now any adress please send it to me.

Stefan Niehren
Institut fuer Umweltphysik
Im Neuenheimer Feld 366
69120 Heidelberg
Germany

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