So to be able to move from one form to the other depends on what is required: amplitude, frequency modulation or both. By using PPM, we can do both phase and amplitude modulation, as demonstrated with ...

Effects of hyperoxia and iNO on LW/BW ratios. Newborn Fischer rats were maintained in room air (air) or exposed to hyperoxia, iNO (20 or 40 ppm) or iNO (20 or 40 ppm) + hyperoxia for 24, 48, 72 ...