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 ...

Cells are transparent, place a few drops of a dye called methylene blue onto the smear so the cells will be visible under the microscope. Use a mounted needle to gently lower a glass coverslip ...

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 ...