Ear pain with several weeks of IV and oral antibiotics, usually fluoroquinolones. Acute otitis media is an infection of the middle ear. More than 80% of children experience at least one episode of otitis media by age 3 years. Acute otitis media is also most common in these first 3 years of life, though older children may also experience it. The most common causative bacteria are "Streptococcus pneumoniae", "Haemophilus influenzae", and "Moraxella catarrhalis". Otitis media often occurs with or following cold symptoms. The diagnosis is made by the combination of symptoms and examination of the tympanic membrane for redness, bulging, and/or a
Membrane gas separation when the pores in the polymer membrane appear and disappear faster relative to the movement of the particles. In a typical membrane system the incoming feed stream is separated into two components: permeant and retentate. Permeant is the gas that travels across the membrane and the retentate is what is left of the feed. On both sides of the membrane, a gradient of chemical potential is maintained by a pressure difference which is the driving force for the gas molecules to pass through. The ease of transport of each species is quantified by the permeability, P. With the assumptions of