„Nothing is motionless in the eyes of the rhythmanalyst. He hears wind, rain, thunderstorm. In observing a pebble a wall or a tree he precieves the slowness of movements of these objects. Their movement is slow only in proportion to our time, our bodies, our rhythms.“

//Kurt Meyer, Rhythms, Streets, Cities

For Euglena Time i am doing experimentation around 5 main correlations that define the concept of rhythm:

mechanical and organic - merging technological and natural, linear and circular time repetition and difference - understanding Euglenas circular rhythm of time continous and discontinous - studying the unique rhythms of each Euglena culture discovery and creation - observing the rhythms of Euglena and creating a habitat for them


The goal is to create an hourglass as one of the oldest technological, linear timepieces which forms a habitat for Euglenas natural, circular rhythms of time.


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Ambrogio Lorenzetti via Wikimedia commons

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.

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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 LEDLight-emitting diode 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)

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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.

Outcome: After 1 hour there is already a clear distinction between the green color at the top and bottom of the glass to be made.

Duration: 1 hour

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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. Is the same effect occurring if only daylight is used instead of a LEDLight-emitting diode?

Duration: 24 hours

Outcome: The concentration on the top of the glass is clearly recognizable. A LEDLight-emitting diode light is clearly not needed. I will therefore proceed with the use of daylight.

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Experiment 4

Goal: Create a concentration thats visible through the red foil. Duration: 24hours

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Setting up sterile Euglena cultures

To avoid contamination in the final hourglass I needed to setup a new culture under sterile conditions. The recipe for doing so can be found on the frontpage of habitats.

Picture1: setting up fresh cultures under sterile conditions Picture 2: The new cultures contain roughly the same amount of euglena and are used to compare their individual time rhythms according to daylight

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