Staining cells: Methylene blue stains negatively charged cell components, such as nucleic acids, a blue color. This makes it easier to see cells under a microscope. Detecting pathogens ...

Please wear gloves and work with the stain in the hood. Place a piece of paper towel on top of the dye. Be sure the paper towel is saturated with the dye. Counterstain with Methylene Blue for 30 ...