The KEU-XE Experiment Unit is a device capable of providing an aquaria-like environment for investigating small aquatic Metazoa (e.g. Xenopus laevis or Zebra fish) or Algae. The KEU-XE features a feeding system relying on osmotic pump.

Two walls of the device consist of permeable membranes to guarantee gas homeostasis. The fluidics consisting of a peristaltic pump (external) lined with a filter with active charcoal allows to regenerate the water. The water recirculation rate is tunable and led by the KEU-XE controller electronics following a predefined timeline. At the end of the experiment the XENOPUS Experiment Unit can be stowed at controlled temperatures. Samples can be kept alive until re-entry on Earth.



Fluidic systems 1
Fluidic actuators 0
Fluidic actuators type PERISTALTIC PUMP (required externally)
Fluidic reservoirs  1
Levels of Containment (LoC) 1
Fluidic System Volume ask for information
Features integrated OSMOTIC PUMP
Automatic control YES
On-Board Electronic Controller NO
Experiment Unit size  ≈ 85x48x57 mm
Experiment Unit mass ≈ 150 grams (fully assembled)
Fits into  multiple KEU-XE fits into KIC-DLM (2 LoC)
Compatible Controller    KAB



QUALIFIED FOR Manned Flight Carrier (Soyuz)
QUALIFIED FOR Manned Flights – Use on ISS



So far, the KEU-XE Experiment Unit has been used to study Xenopous laevis tadpoles.

 Each KEU-XE Experiment Unit (EU) backbone is made of semi-crystalline thermoplastic polymer with excellent mechanical and chemical resistance properties, biologically inert.  The larger aquarium surfaces, respectively the rear and front wall, are made of a gas permeable membrane.  The EU itself provides one level of containment (LoC) that is increased to three by using KIC-DLM containers class. Each aquarium is provided with an independent fluidic system.

 On the whole, the fluidic system consists of a peristaltic pump, connecting silicon tubes, an aquarium, an osmotic pump, a filter acting as a waste control device and air permeable membranes for gas exchange. Basically, the force exerted by the peristaltic pump guarantees the fluid exchange within the aquarium; air permeable membranes guarantee gas homeostasis. An osmotic pump releases nutrients for Xenopous laevis tadpoles. A filtering device maintains water quality.





2008 XENOPUS PI Eberhard Horn (Univ. of Ulm) – Martin Gabriel (Univ. of Göttingen)

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