Team:Groningen/Template/MODULE/project/MBD/experiments

From 2014.igem.org

(Difference between revisions)
(Created page with "<html> <!--Content module--> <div class="module contentmodule gridcell"> <div class="content"> <div class="wrapper"> <div class="hspacer"> </div> </div> <div class="hspa...")
 
(16 intermediate revisions not shown)
Line 6: Line 6:
 +
<!-- TITLE SNIPPET START-->
 +
<div class="title">
 +
Modeling experiments
 +
 +
</div>
 +
<div class="hspacer">&nbsp;</div>
 +
<!-- TITLE SNIPPET END-->
 +
 +
 +
 +
<!-- PARAGRAPH SNIPPET START-->
 +
<div class="text">
 +
The hydrogel in the bandage should have nutrient source for the bacteria to grow. Using rich media like M17 in the bandage for growing Lactococcus lactis is not a good idea. Rich media might support the growth of other bacteria’s present on the wound which might cause adverse problems. To avoid this kind of complications we decided to use chemically defined media. Chemically defined media is a buffered media containing all the aminoacid, vitamins and other metal suppliments.   
 +
</div>
 +
<div class="hspacer">&nbsp;</div>
 +
<!-- PARAGRAPH SNIPPET END-->
 +
 +
 +
<!-- PARAGRAPH SNIPPET START-->
 +
<div class="text">
 +
 +
1. Glucose Concentration optimization for Nisin production<br><br>
 +
 +
To increase the lifetime of the bandage we decided to increase the amount of carbon source. Lactococcus lactis is lactic acid producing bacteria, increasing the amount of carbon source in the media results in faster production of lactic acid. Lactic acid present in the media represses the growth of bacteria. The presence of phosphate buffer in the chemically defined media solves this problem to some extent. It has been reported that Nisin is produced only in exponential growth phase. In order to evaluate the glucose concentration at which Nisin production is higher we grew Nisin producing strain in CDM media and every two hours sample was collected to perform Nisin activity test.
 +
 +
 +
</div>
 +
<div class="hspacer">&nbsp;</div>
 +
<!-- PARAGRAPH SNIPPET END-->
 +
 +
 +
<!-- FIGURE SNIPPET START -->
 +
</html>{{:Team:Groningen/Template/MODULE/newfigure|Figure 5|5/57/Diffusionexperiment.jpg|
 +
Diffusion experiment wilt <i>L. lactis</i> over time.
 +
}}<html>
 +
<!-- FIGURE SNIPPET END-->
 +
 +
<!-- PARAGRAPH SNIPPET START-->
 +
<div class="text">
 +
Based on the nisin activity assay we got similar diameter of halo for 20 g/l and 40 g/l of glucose concentration. We analyzed the supernatants using HPLC to find the exact concentrations of nisin. HPLC analysis showed that at 20 g/l of glucose concentration we get higher nisin yield.     
 +
</div>
 +
<div class="hspacer">&nbsp;</div>
 +
<!-- PARAGRAPH SNIPPET END-->
 +
 +
<!-- FIGURE SNIPPET START -->
 +
</html>{{:Team:Groningen/Template/MODULE/newfigure|Figure 5|4/44/Growth.png|
 +
Growth curve for 20 g/l of glucose concentration.
 +
}}<html>
 +
<!-- FIGURE SNIPPET END-->
 +
 +
 +
<a href="https://static.igem.org/mediawiki/2014/8/83/InitialconditionsDesign1.m">initial conditions 1 matlab</a><br>
 +
 +
<a href="https://static.igem.org/mediawiki/2014/c/c4/Initialconditionsdesign2.m">initial conditions 2 matlab</a><br>
 +
 +
<a href="https://static.igem.org/mediawiki/2014/e/e6/Initialconditionsdesign3.m">initial conditions 3 matlab</a><br>
 +
<a href="https://static.igem.org/mediawiki/2014/a/ab/Initialconditionsdesign4.m">initial conditions 4 matlab</a><br>
 +
<a href="https://static.igem.org/mediawiki/2014/0/0d/Initialconditionsdesign5.m">initial conditions 5 matlab</a><br>
 +
<a href="https://static.igem.org/mediawiki/2014/6/68/Initialconditionsdesign6.m">initial conditions 6 matlab</a><br>
 +
<a href="https://static.igem.org/mediawiki/2014/0/02/Twodimensionmodel2.m">two dimension model</a><br>
 +
 +
<a href="https://static.igem.org/mediawiki/2014/1/1e/Kopie_van_Growth_curve_Lactis_in_CDM.xls">growth curve <i>L. lactis</i></a>
<div class="hspacer">&nbsp;</div>
<div class="hspacer">&nbsp;</div>

Latest revision as of 03:55, 18 October 2014

Modeling experiments
 
The hydrogel in the bandage should have nutrient source for the bacteria to grow. Using rich media like M17 in the bandage for growing Lactococcus lactis is not a good idea. Rich media might support the growth of other bacteria’s present on the wound which might cause adverse problems. To avoid this kind of complications we decided to use chemically defined media. Chemically defined media is a buffered media containing all the aminoacid, vitamins and other metal suppliments.
 
1. Glucose Concentration optimization for Nisin production

To increase the lifetime of the bandage we decided to increase the amount of carbon source. Lactococcus lactis is lactic acid producing bacteria, increasing the amount of carbon source in the media results in faster production of lactic acid. Lactic acid present in the media represses the growth of bacteria. The presence of phosphate buffer in the chemically defined media solves this problem to some extent. It has been reported that Nisin is produced only in exponential growth phase. In order to evaluate the glucose concentration at which Nisin production is higher we grew Nisin producing strain in CDM media and every two hours sample was collected to perform Nisin activity test.
 
Figure 5
 
Figure 5: Diffusion experiment wilt L. lactis over time.
 
 
Based on the nisin activity assay we got similar diameter of halo for 20 g/l and 40 g/l of glucose concentration. We analyzed the supernatants using HPLC to find the exact concentrations of nisin. HPLC analysis showed that at 20 g/l of glucose concentration we get higher nisin yield.
 
Figure 5
 
Figure 5: Growth curve for 20 g/l of glucose concentration.
 
 
initial conditions 1 matlab
initial conditions 2 matlab
initial conditions 3 matlab
initial conditions 4 matlab
initial conditions 5 matlab
initial conditions 6 matlab
two dimension model
growth curve L. lactis
 
 
 

Retrieved from "http://2014.igem.org/Team:Groningen/Template/MODULE/project/MBD/experiments"