... were thoroughly wiped down with 70% alcohol, and a Bunsen burner was used to sterilize all equipment used. Milk Experiment: In 8 petri dishes, we poured agar to act as a medium to culture the bacteria. We then used 2 dishes each for control groups, fresh milk, 24 hour old milk, 4 day old ... . Crystal violet staining detects the presents of bacteria. Gram staining identifies volatile verses nonvolatile bacteria. E. coli Experiment: In 8 petri dishes, we again poured agar to act as a medium for the bacterial growth. We then smeared all 8 with the bacteria E. Coli. We kept 2 for control gro...

• Word Count: 1681
• Approx Pages: 7
• Has Bibliography
• Grade Level: High School

... rods. I though I was going to have a difficult time trying to identify one species until I looked at the TSA plate. One of the bacteria gave off a blue-green pigment into the agar, this is only characteristic to one bacterium on the list of specific bacteria we could have. The other bacteria had a cream growth on the TSA plate but a red colony on ... ...

• Word Count: 765
• Approx Pages: 3
• Grade Level: High School