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Display neurofibrils by Cajal silver staining technology (CAT#: STEM-CT-0009-LJX)

Introduction

Cajal was the first person to specialize in studying the structure of nerve fibers, and his improved silver staining method can effectively display nerve fibers and various glial cells. This method uses pyridine as a fixative and can simultaneously display neuronal cell bodies, neurofibrils, processes, and synapses. On this basis, many improved methods were developed for displaying neurofibrils and various glial cells, such as the Gross Schultze silver immersion method for displaying nerve endings and the Grono method for displaying oligodendrocytes. This method has excellent results, but requires fresh, undamaged, and disease-free materials.




Principle

Silver staining, also known as silver plating staining, is one of the important staining methods for nerve tissue. The basic operating method is to first immerse the tissue slices with silver nitrate or mercury chloride to precipitate silver or mercury ions, phosphates, urates, etc. After washing, silver or mercury is reduced by formaldehyde, photographic developer, or sunlight, resulting in a black staining phase due to the precipitation of metallic silver or mercury. In this method, the reduction of silver or mercury salts is carried out by adding reducing agents or sunlight from outside the cell, while reducing substances derived from the cell are unrelated to this.

Applications

Staining of nerve tissue section samples from experimental animals

Procedure

1.After fixing the tissue, soak it in pure water for a while.
2.Soak and fix the tissue in pyridine solution.
3.Soak the tissue in pure water.
4.Move the tissue into a 37℃ incubator and dye it in the dark with silver nitrate solution for 2 to 3 days.
5.Soak the tissue in pure water for a while.
6.Wash with ethanol.
7.Put the tissue into the color developing solution for color development.
8.Wash with pure water
9.The tissue was dehydrated by gradient ethanol, sliced by transparent xylene and embedded in paraffin for microscopic examination.

Materials

• Sample Type:
Nerve tissue section samples from experimental animals

Notes

If the sample is too lightly stained, it can be immersed in 0.2% gold chloride solution for color enhancement after dewaxing the section.