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 ...

Crystal violet showed about the same selective and bactericidal action as gentian violet. 3. Methylene blue as made up for staining showed little or no bactericidal action, the percentage of alcohol ...

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 ...

1. Use the smear prepared in the previous procedure. Staining is done at the sink. 2. Add several drops of Methylene blue, enough to cover the smear, and wait 1 min. 3. Rinse the slide with water from ...