👉 Staining is a process used in biology and medicine to visualize cells, tissues, or other materials by exposing them to an image of a fluorescently labeled dye. This stain is usually applied using a microscope slide or a glass slide coated with a film of a radioactive material, such as iodine, which is then exposed to light. The fluorescent signal from the dye is detected and converted into a picture of the stained material.
