R Fascians Experiment
In the first experiment, the bacteria R. fascians and R. corynebacterioides grew equally well in all conditions of light, except ultraviolet light. We tested this by comparing the petri dishes to the petri dishes that grew without light. Here, the exposure time was constant for all the lights and no light, which is 48 hours. The light sources were different. However, none of the lights had an effect on the bacteria, for the bacteria just continued to grow normally. The only exception was that UV light killed both bacteria completely. In the second experiment, we decided to take the bacteria and expose it to UV light for shorter durations, starting from 5 minutes, 10 minutes, and so on until 24 hours. For 5 minutes, R. fascians had an average
diameter of 1.1 centimeters and had an estimated number of 3750 bacterial colonies. R. corynebacterioides had an average diameter of 0.6 cm and had an estimated number of 400 bacterial colonies. For 10 minutes, R. fascians had an average diameter of 0.97 cm and had an estimated number of 2200 bacterial colonies. While R. corynebacterioides had an average diameter of 0.42 cm and had an estimated number of 300 bacterial colonies. For 30 minutes, R. fascians had an average diameter of 0.76 cm and had an estimated number of 1100 bacterial colonies. The R. corynebacterioides did not grow at all in this time span. For 1 hour, R. fascians had an average diameter of 0.63 cm and had an estimated number of 900 bacterial colonies. Again, the R. corynebacterioides did not grow at all. For the rest of the the time after 1 hour, both bacteria did not grow.
diameter of 1.1 centimeters and had an estimated number of 3750 bacterial colonies. R. corynebacterioides had an average diameter of 0.6 cm and had an estimated number of 400 bacterial colonies. For 10 minutes, R. fascians had an average diameter of 0.97 cm and had an estimated number of 2200 bacterial colonies. While R. corynebacterioides had an average diameter of 0.42 cm and had an estimated number of 300 bacterial colonies. For 30 minutes, R. fascians had an average diameter of 0.76 cm and had an estimated number of 1100 bacterial colonies. The R. corynebacterioides did not grow at all in this time span. For 1 hour, R. fascians had an average diameter of 0.63 cm and had an estimated number of 900 bacterial colonies. Again, the R. corynebacterioides did not grow at all. For the rest of the the time after 1 hour, both bacteria did not grow.