Influence of changing g-forces during parabolic flight and simultaneous clinorotation on the ROS production visualized by luminol kinetics in the PMT clinostat. Cells were activated by opsonized zymosan stimulation before the first parabola and clinorotated for 11 parabolas at 60 rpm. 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 interval is grey shaded.