gram staining
TRANSCRIPT
Gram Stain Material
solutions of crystal violet, Gram’s iodine (2 g potassium iodide in 300 ml distilled water plus 1 g iodine crystals), 95% ethanol and/or
isopropanol-acetone mixture (3:1 v/v), and
safranin Bismark brown stain (for color-
blind students) clean glass slides inoculating loop Bunsen burner bibulous paper
microscope lens paper and lens cleaner immersion oil Hyphomonas
(Hyphomicrobium) neptunium (ATCC 15444) grown in marine broth (Difco)
slide warmer staining rack Bacto Gram Stain Reagents
from Difco for the three-step Gram stain