Marigold Lab

Biology lab: Methods and Results February 14, 2012 Genus species Methods: In order to conduct our odour into we started off with two petri dishes, six antibiotic drugs and two types of bacterium to overtake our experiment. The bacteria that were being apply in this experiment were E. coli and S. Marscescens. The antibiotics that be being used to combat the bacteria atomic number 18 called Penicillin (1929), Streptomycin (1947), erythromycin (1952), Ampicillin (1961), Gentamicin (1971), and Ciprofloxin (1987). In the two petrib dish, for each one is independently chosen to be for E. coli and for S. Marscensen. At the bottom of the petri dishes we aim it with intravenous feeding quadrants to make sure that each of the antibiotics were hardened in the in force(p) quadrant and be able to call in how the bacteria acted in respect to the viewment of the antibiotic. One of the quadrants was unplowed as the harbor of the experiment. There were six a ntibiotic besides each free radical mystify only one-third of the antibiotic for each bacteria. When placing the bacteria on the petri dish we used a pipette to obtain 100uL of the bacteria onto the petri dish. With a retinal rod (spreader) that was dip in grain alcohol and then place under the busen burner in order to undermine it; we spread the bacteria on every surface compass of the petri dish.

We wanted near 10 minutes for the bacteria to dry off, before applying the antibiotics. The deuce-ace antibiotics were place in the center of the quadrants and a control was as well place in the fourth quadrants c arefully. one time this was make we close ! the petri dish and sealed it with parafilm for more protective finish for the environment of the bacteria. The two petri dish that contained E. coli and S. Marscensen were placed upside vote out and allowed the growth of the bacteria to interact with the antibiotics for a calendar week. Results: The bacteria in the petri dish were left to grow for a week and in this process grew around the antibiotic depending on how rough-and-ready the antibiotic was. As we know each antibiotic...If you want to she-bop a full essay, order it on our website: BestEssayCheap.com

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