Bielschowsky Technique for Senile Plaques Protocol A silver stain to demonstrate neurofibrillary tangles, nerve fibers and senile plaques in Alzheimer's disease. The nerve fibers are sensitized with a silver solution. The sections are treated with ammoniacal silver, and then reduced to a visible metallic silver.
Congo Red Putcher's Modification Amyloid Protocol Protocol to demonstrate amyloid deposits in tissue sections. When stained with the Congo Red Stain the amyloid, with the aide of polarizing lenses, will birefringe an apple green color. Under the microscope.