Low volume ventilation without periodic large inflations leads to diminished alveolar stability and to the accumulation of increased amounts of airway disaturated phosphatidylcholine (DSPC) in large aggregates that sediment at 1,000 g; surfactant in this form lowers surface tension less rapidly than surfactant present in the 1,000-g supernatant fraction. These observations led to the present wo...

Although the serodiagnosis of syphilis by various tests has been carried out routinely for many years, our knowledge concerning the chemical nature of the specific antibody and antigen is still too limited to allow a satisfactory interpretation of the serological reactions involved. Valuable contributions towards the elucidation of the structure of several constituents of the antigen have been ...