Dense granular media have a compaction between the random loose and random close packings. For these dense media the concept of a granular pressure depending on compaction is not unanimously accepted because they are often in a ”frozen” state which prevents them to explore all their possible microstates, a necessary condition for defining a pressure and a compressibility unambiguously. While pe...

Hyperoxia is known to injure tissues and cells (1) . In a series of papers the quantitative influence of hyperoxia on some aspects of lung ultrastructure was elucidated (2-4) . These studies revealed that hyperoxia resulted in rapid destruction of the pulmonary capillaries, a thickening of the air-blood barrier, and, eventually, a repopulation of the alveolar epithelium by granular pneumocytes ...