FIGURE 5.

Gravity levels provided by the KUBIK inside the BMR chamber. The image shows a cross-section of the Experimental Unit (EU) before (right BMR) and after (left BMR) activation by medium injection. The membranes are colored in yellow. 1 × g and 0.4 × g were delivered at the top surface of the basalt slides (sample surface). When the membrane flips (left BMR), following medium injection in the chamber, the radius of the culture chambers ranges from 65.7 mm to approx. 85 mm. In the KUBIK incubators, the direction of the gravity vector imposed on the EU goes from the basalt slide toward the membrane surface. This causes a 1.3-fold increase of gravity across the culture chamber, leading to a gravity acceleration on the membrane surface of 1.3 × g (Flight 1-g) and 0.5 × g (Mars g).