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Team:Evry/Notebook/w2
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<h1>Week 2: 24th June - 30th June</h1> | <h1>Week 2: 24th June - 30th June</h1> | ||
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<h2> Monday, June 24th </h2> | <h2> Monday, June 24th </h2> | ||
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<p> Our competents cells made on friday the 21st were plated and incubated the whole week-end at 30°C. Today, we analyzed the plates and came to the conclusion that the medium was contaminated due to poor protocol execution. As a consequence, we decided to make new LB medium and recalculate the antibiotic concentrations.<br/> | <p> Our competents cells made on friday the 21st were plated and incubated the whole week-end at 30°C. Today, we analyzed the plates and came to the conclusion that the medium was contaminated due to poor protocol execution. As a consequence, we decided to make new LB medium and recalculate the antibiotic concentrations.<br/> | ||
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<b><div align="center">Protocol for LB medium preparation</b><br/></div> | <b><div align="center">Protocol for LB medium preparation</b><br/></div> | ||
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Add 20 g of LB broth into 1000 mL of desalted water and autoclave.<br/> | Add 20 g of LB broth into 1000 mL of desalted water and autoclave.<br/> | ||
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<b><div align="center">Protocol for antibiotic solutions preparation</b><br/></div> | <b><div align="center">Protocol for antibiotic solutions preparation</b><br/></div> | ||
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<p>Kanamycin is used as an effective concentration of 10-50 µg/ml and at a storage concentration of 10 mg/ml<br/> | <p>Kanamycin is used as an effective concentration of 10-50 µg/ml and at a storage concentration of 10 mg/ml<br/> | ||
Carbenicillin is used as an effective concentration of 20-60 µg/ml and at a storage concentration of 50 mg/ml<br/> | Carbenicillin is used as an effective concentration of 20-60 µg/ml and at a storage concentration of 50 mg/ml<br/> | ||
| - | Chloramphenicol is used as an effective concentration of 25-170 µg/ml and at a storage concentration of 34 mg/ml(ethanol)<br/> | + | Chloramphenicol is used as an effective concentration of 25-170 µg/ml and at a storage concentration of 34 mg/ml (ethanol)<br/> |
| - | Tetracyclin is used as an effective concentration of 10-50 and at a storage concentration of 5 mg/ml(ethanol)<br/></p> | + | Tetracyclin is used as an effective concentration of 10-50 and at a storage concentration of 5 mg/ml (ethanol)<br/></p> |
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<h2>Tuesday, June 25th</h2> | <h2>Tuesday, June 25th</h2> | ||
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<p>New competent cells have been made with the same strains of bacteria. We thought that the contamination of our cells was due either to the solution of CaCl2 that we used which may had not been sterile and/or incorrect manipulations. This time, we prepared new CaCl2 solutions that we made sure to autoclave correctly. Then, same tests as we did before of contamination and competence have been made.</p> | <p>New competent cells have been made with the same strains of bacteria. We thought that the contamination of our cells was due either to the solution of CaCl2 that we used which may had not been sterile and/or incorrect manipulations. This time, we prepared new CaCl2 solutions that we made sure to autoclave correctly. Then, same tests as we did before of contamination and competence have been made.</p> | ||
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<h2>Wednesday, June 26th</h2> | <h2>Wednesday, June 26th</h2> | ||
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<p>The DH5a strain was not contaminated and competent. The TOP10 strain was contaminated only on the Kanamycin petri dish and competent. The BL21 strain was contaminated and not usable.</p> | <p>The DH5a strain was not contaminated and competent. The TOP10 strain was contaminated only on the Kanamycin petri dish and competent. The BL21 strain was contaminated and not usable.</p> | ||
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<h2> Thurdsay, June 27th </h2> | <h2> Thurdsay, June 27th </h2> | ||
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<p>We designed the plasmid constructions and primers we will use.</p> | <p>We designed the plasmid constructions and primers we will use.</p> | ||
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<script type="text/javascript">writeFooter()</script> | <script type="text/javascript">writeFooter()</script> | ||
</html> | </html> | ||
Revision as of 16:33, 28 July 2013
Week 2: 24th June - 30th June
Monday, June 24th
Our competents cells made on friday the 21st were plated and incubated the whole week-end at 30°C. Today, we analyzed the plates and came to the conclusion that the medium was contaminated due to poor protocol execution. As a consequence, we decided to make new LB medium and recalculate the antibiotic concentrations.
Add 20 g of LB broth into 1000 mL of desalted water and autoclave.
Kanamycin is used as an effective concentration of 10-50 µg/ml and at a storage concentration of 10 mg/ml
Carbenicillin is used as an effective concentration of 20-60 µg/ml and at a storage concentration of 50 mg/ml
Chloramphenicol is used as an effective concentration of 25-170 µg/ml and at a storage concentration of 34 mg/ml (ethanol)
Tetracyclin is used as an effective concentration of 10-50 and at a storage concentration of 5 mg/ml (ethanol)
Tuesday, June 25th
New competent cells have been made with the same strains of bacteria. We thought that the contamination of our cells was due either to the solution of CaCl2 that we used which may had not been sterile and/or incorrect manipulations. This time, we prepared new CaCl2 solutions that we made sure to autoclave correctly. Then, same tests as we did before of contamination and competence have been made.
Wednesday, June 26th
The DH5a strain was not contaminated and competent. The TOP10 strain was contaminated only on the Kanamycin petri dish and competent. The BL21 strain was contaminated and not usable.
Thurdsay, June 27th
We designed the plasmid constructions and primers we will use.
