- Changes with temperature are large
- It is 37 degrees in Experiment 1. This time we experimented at 27 degrees
and 5 degrees respectively.
- Compared with Experiment 1 (37℃), Experiment 2 (27℃) was left for the same
time, but the latter had less bacterial growth. Also, at 5 degrees, it
was impossible to visually confirm the bacteria.
- It was found that the bacteria are liable to propagate when the temperature
is close to body temperature.
- Comparison in UV and dark place
- Although UV lamp was used this time, the temperature in the UV experiment
was slightly higher than room temperature because heat from the machine,
and because it was put in the box, the heat was likely to be trapped.
- UV (ultraviolet rays) is said to have a bactericidal effect, but in this
experiment it was impossible to confirm the bactericidal effect.
- This may be due to the fact that the change with temperature is larger
than the sterilization effect by UV.
- After all, it is not seen much change before hand washing and after soap
washing
- Although it was a little after soap washing, there was not much difference
between the two changes this time too. Again, it is thought that the organic
matter contained in the soap breeded like a fungus.
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- On the next page, we will look at "prevention of infection".
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