pH sensitive stains

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From:"May, Christine" <>
To:"''" <>
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Hi All,
	I am looking for a stain, maybe a trichrome, that could 1.) be used
in MMA or GMA embedded sections, 2.) stain a hydroxyapatite-derived
biomaterial based on an extreme pH.   Basicly, does anyone know of a stain
that stains tissues based on their differing pH?  Thank You- Christine

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