GMU:Habitats SS18/Leoni Fischer: Difference between revisions

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Euglena is a micro organism that does photosynthesis and therefore is attracted by light.

In my experiments I study this phototaxis (orientation by light). For doing so I try to influence their behavior in relation to different light situations.

// Experiment1

Goal:

Euglena cant recognize red light, therefore I wrapped the tube in transparent red foil to see if they would concentrate on the transparent bottom where the light source is.

Setup: Glass tube filled with water and Euglena, the tube is wrapped in semitransparent red foil. An LED light is placed on the bottom of the glass, which is not covered with foil.

Duration: 12 hours

Outcome:

After 12 hour there is a visible concentration on the bottom of the tube. (Picture 3)

[[File:WhatsApp Image 2018-05-18 at 10.40.27.jpeg|400px]][[File:before_1.jpg|400px]][[File:after_1.jpg|400px]]

// Experiment 2

Goal and Setup: After seeing the concentration after 12 hours from Experiment 1 I wanted find out how long it takes to have a visible concentration of Euglena. Therefore I repeated the same experiment for 1 hour.

[[File:11_20.jpeg|400px]][[File:12_20.jpeg|400px]]

// Experiment 3

Goal and Setup: After Experiment 1 I wanted to find out to what degree gravity influenced the concentration on the bottom, therefore I made the same experiment upside down.

@@ Line 21: / Line 21: @@
 Euglena is a micro organism that does photosynthesis and therefore is attracted by light.
 In my experiments I study this phototaxis (orientation by light). For doing so I try to influence their behavior in relation to different light situations.
+// Experiment1
+Goal:
+Euglena cant recognize red light, therefore I wrapped the tube in transparent red foil to see if they would concentrate on the transparent bottom where the light source is.
+Setup: Glass tube filled with water and Euglena, the tube is wrapped in semitransparent red foil. An LED light is placed on the bottom of the glass, which is not covered with foil.
+Duration: 12 hours
+Outcome:
+After 12 hour there is a visible concentration on the bottom of the tube. (Picture 3)
+[[File:WhatsApp Image 2018-05-18 at 10.40.27.jpeg|400px]][[File:before_1.jpg|400px]][[File:after_1.jpg|400px]]
+// Experiment 2
+Goal and Setup: After seeing the concentration after 12 hours from Experiment 1 I wanted find out how long it takes to have a visible concentration of Euglena. Therefore I repeated the same experiment for 1 hour.
+[[File:11_20.jpeg|400px]][[File:12_20.jpeg|400px]]
+// Experiment 3
+Goal and Setup: After Experiment 1 I wanted to find out to what degree gravity influenced the concentration on the bottom, therefore I made the same experiment upside down.