Re: LACMOID RE: OOCYTES - HELP!!!!
Bruce Abaloz at the University of Melbourne, Victoria, Australia asks about
an obscure dye called lacmoid.
Checking the 1977 ninth edition of Conn's Biological Stains, I find that
Lacmoid (C.I. 51400) was a very poorly defined dye that was intended as a
replacement for litmus (called Lackmus in German), a pH indicator dye
extracted from lichens (how long since any of us has seen real litmus paper?
I'd say about fifty years for me. That's what the "litmus test" that
political pundits love to prattle about refers to.) R.D. Lillie doesn't
mention any stain for oocytes among several then already ancient procedures.
He implies that the dye was readily available about thirty years ago.
I think I'd find a substitute for it, possibly synthetic orcein.
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