Noun [edit]. viola â(plural violas). ( 1 music) A stringed instrument of the violin family, somewhat larger than a violin, played under the chin, and having a deeper tone. ( 2 music) An organ stop having a similar tone. ( 3 music) A 10-string steel-string acoustic guitar, used in Brazilian folk music.oun [edit]. viola â(plural violas). ( 1 music) A stringed instrument of the violin family, somewhat larger than a violin, played under the chin, and having a deeper tone. ( 2 music) An organ stop having a similar tone. ( 3 music) A 10-string steel-string acoustic guitar, used in Brazilian folk music.
Dipalmitoylphosphatidylcholine (DPPtdCho) is a phospholipid (and a lecithin) consisting of two palmitic acids attached of a phosphatidylcholine head-group and is the major constituent of many pulmonary surfactants. It is zwitterionic by virtue of having a negative charge on the phosphate group and a positive charge on the quaternary ammonium group.
Diaphragmatic/phrenic (D/P) nerve pacing is an alternative to mechanical ventilation for a select subgroup of. patients. D/P pacing, also referred to as phrenic pacing, phrenic nerve stimulation, diaphragm pacing, or. electrophrenic respiration, is the electrical stimulation of the diaphragm via the phrenic nerve, the major nerve. supply to the diaphragm that controls breathing. The two FDA approved D/P pacing systems are the Mark IV â¢.