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Metals Lab

THE PROCEDURE:

In this lab the interns tested how Halobacterium would react if it was introduced to certain metals. They focused on one metal, iron sulfate.
The experiment had five different concentrations of iron sulfate: 0 mM, 5mM, 6.5mM, 7.5mM, and 8.5 mM. Halobacterium was introduced to these concentrations and was incubated for 48 hours in 37 degrees Celsius at 220 rpm. Then the interns measured the cell density by using the spectrophotometer and recorded the data.
As a result they found that Halobacterium dies when it is introduced to iron sulfate at higher concentration .

THE REFLECTION:

Looking back at this lab has reminded us that humans have been the cause for the extinction of many animals. High levels of metal in the halobacterium’s environment isn’t a good thing for them and this lab is a reminder that we as humans play a role in the ecosystems of many animals, including halobacterium. Were halobacterium are tolerant of some toxic metals other animals may not be so tolerant and others may need higher levels for survival.

 

 

 

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Disclaimer:
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.