"Results" sort of

with all the pictures, the file is taking FOREVER to attach to the e-mail and i am giving up. you can just take my word for it that the pictures are there and the data table is formatted. sarah - should i give this to you in bio class tomorrow via a flash drive? will we have time to do some editing?



Counting Methods:
Individual colonies on the plates were counted as “one,” regardless of size. There were visibly more colonies on the Mouth: Tom’s plate, but the colonies on the Mouth: Water plate each had a larger area (see Figures 1 and 7). Thus, the net area covered by the colonies was about the same, though numerically Mouth Tom’s had more colonies.
When the bacteria did not form colonies, but instead covered dense areas of the plate, the diameter of the area covered was measured in centimeters. This method was used for the E. Coli: Tom’s plate (see Figure 2) and the E. Coli: Water plate (see Figure 4). It is important to note that this method does not take into account a dense film of colonies outside the area measured.
The E. Coli: Scope plate did not grow anything. The method used for creating this plate was slightly different from those used creating the other plates. The Scope was left in with the incubating E. Coli bacteria for approximately 24 hours. The other plates had their respective mouthwashes left in with the incubating bacteria for only ten minutes. Thus, the lack of bacteria on the E. Coli Scope plate could either be because the Scope killed all the bacteria or because the experiment failed. Either way, the results cannot accurately be compared with the other trials.

Mouth E. Coli
Water 330 colonies 4.65 cm diameter
Tom's 721 colonies 3.3 cm diameter
Listerine 2 colonies 4 colonies
Scope 45 colonies 0 colonies
Table 1. Results observed on plates




































Figure 1. Mouth: Water plate








Figure 2. E. Coli: Water plate. Approximate circle whose diameter was measured for our results shown in red circle.






Figure 3. Mouth: Scope plate
































Figure 4. E. Coli: Tom’s plate
Approximate circle whose diameter was
measured for our results shown in red circle.
Figure 5. Mouth: Listerine plate


















Figure 6. E. Coli: Listerine plate






















Figure 7. Mouth: Tom’s plate




















Figure 8. E. Coli: Scope plate