Team:Newcastle/2 July 2010

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===Urease test===
===Urease test===
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The experiment was performed on 010710. For the experimental protocol, please see 010710 lab notebook.
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The experiment was performed on 01.07.10. For the experimental protocol, please see 01.07.10 lab notebook.
===Results===
===Results===

Revision as of 14:58, 21 July 2010

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Contents

Aim of this experiment

The aim of this experiment was to determine if Bacillus subtilis 168 is able to produce urease and degrade urea.

Urease test

The experiment was performed on 01.07.10. For the experimental protocol, please see 01.07.10 lab notebook.

Results

|Newcastle urease test 020710.png

Figure 1: Urease test results

  1. Negative control - No color change (Orange color)
  2. Test 1 (Duplicate) - Pink-red color
  3. Test 2 (Duplicate) - Pink-red color

Conclusion

B. subtilis 168 is able to produce urease, therefore, urea which is the substrate and can be found in the agar was degraded, which results in ammonia building. The ammonia makes the media alkaline and therefore the indicator phenol red will change from orange color to pink-red color.

The negative control did not turn pink-red color, therefore indicating that no contamination had occurred.

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