crystal Protocols

Category: Staining Protocols: Gram Staining Protocols

Protocol for gram stain. Includes: Hucker-conn ammonium oxalate - Crystal violet; Weigerts Iodine; 0.1% Nuclear fast red. - [Read Gram Stain Protocol]

Category: Staining Protocols: Gram Staining Protocols

Gram-positive and Gram-negative organisms form a complex of crystal violet and iodine within the bacterial cell during the Gram-staining procedure. Gm+ organisms are thought to resist decolorization by alcohol or acetone because cell wall permeability is markedly decreased when it is dehydrated by these solvents. Thus, the dye complex is entrapped within the cell, resist being washed out by the solvents, and Gm+ bacteria remain purple following this differential stain. - [Read Gram Staining Protocol]

Category: Neuroscience Protocols: Neuronal Stains Protocols

An appropriate term for glial fibers is 'nerve glue', because they provide the internal support of the central nervous system.  There are four types of glial cells: astrocytes, oligosendroglia,microglia, and ependymal cells. The glia fibers are stained with crystal violet which are resistant to the aniline-chloroform differentiating solution. - [Read Holzer's Stain Protocol]