Hi everyone,  1)  I need help to find a commercial hematoxylin that I can use for GMA, paraffin, frozen and cytospins H&E's and  I don't need to filter everyday. I recently bought    
     Harris hematoxylin,acidified (mercury free) from Polysciences, Inc. I don't like it. Does anyone out there has a suggestion?  2)  Does anyone out there using tunnel assays? Which is the best tunnel for IHC?  3)  Also I need to learn EM where can I learn it? What schools offer EM? I live In Washington,DC area.  Thanks so much in advance, Minnie 



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