Influence of changing g-forces during parabolic flight and clinorotation on the ROS production visualized by luminol kinetics in the PMT clinostat. Cells were activated by opsonized zymosan stimulation before parabola 16 and clinorotated in μg at 60 rpm for 8 parabolas. In parabolas 24 and 25 clinorotation was performed during μg and hyper-g and rotation was then stopped. Luminescence was measured in counts per second (CPS). Detailed ROS production (blue) is shown in correspondence to g-profile (grey, kindly provided by Novespace). The clinorotated intervals are grey shaded.