title: A modified semipermeable membrane technique for carbonic anhydrase histochemistry of the nervous system.
abstract: We present a modification of Hansson's method for the demonstration of carbonic anhydrase activity. Using a semipermeable membrane together with a fluid incubation medium, frozen sections of aldehyde-fixed tissue were incubated without floating or dipping. Thin sections (thickness, 20-40 microns) were mounted on the outer surface of a tubular-shaped, semipermeable cellophane dialysis membrane containing the incubation fluid. After incubation for 25-30 min at room temperature, the sections were rinsed in buffer and treated with 0.5% (NH4)2S solution. The histochemical reaction was fully inhibited by 10(-4) M acetazolamide.
mesh_terms: D000818:Animals; D002256:Carbonic Anhydrases / Q000378:metabolism*; D006651:Histocytochemistry / Q000295:instrumentation*; D008567:Membranes, Artificial; D009420:Nervous System / Q000201:enzymology*; D010539:Permeability; D051381:Rats
chemical_list: D008567:Membranes, Artificial; D002256:Carbonic Anhydrases