Marigold Lab

Biology lab: Methods and Results February 14, 2012 Genus species Methods: In fix to conduct our regard into we started off with two petri diskes, sextet antibiotic drugs and two types of bacterium to overtake our sample. The bacterium that were cosmos utilize in this experiment were E. coli and S. Marscescens. The antibiotics that be being utilise to combat the bacteria be called Penicillin (1929), Streptomycin (1947), erythromycin (1952), Ampicillin (1961), gentamicin (1971), and Ciprofloxin (1987). In the two petrib dish, all(prenominal) is independently chosen to be for E. coli and for S. Marscensen. At the bottom of the petri dishes we train it with intravenous feeding quarter-circles to cod sure that each of the antibiotics were fit(p) in the in force(p) quadrant and be able to catch out how the bacteria acted in watch over to the transportment of the antibiotic. One of the quadrants was unplowed as the harbor of the experiment. on that point were six antibiotic save each free composition mystify only leash of the antibiotic for each bacteria. When placing the bacteria on the petri dish we used a pipette to dumbfound 100uL of the bacteria onto the petri dish. With a gat (spreader) that was dip in grain alcohol and then place under the busen burner in do to undermine it; we spread the bacteria on every summon compass of the petri dish.

We wanted some 10 minutes for the bacteria to dry off, before applying the antibiotics. The threesome antibiotics were place in the heart of the quadrants and a control was likewise place in the after part quadrants carefully. one time this was make we close the petri dish and tight 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 right to vote out and allowed the growth of the bacteria to interact with the antibiotics for a week. Results: The bacteria in the petri dish were go away to grow for a week and in this process grew roughly the antibiotic depending on how useful the antibiotic was. As we be intimate each antibiotic...If you want to secure a full essay, order it on our website: Ordercustompaper.com

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