Effect of nasal airway nonlinearities on oscillometric resistance measurements in infants.

Oscillometric measurements of respiratory system resistance (R) in infants are usually made via the nasal pathways, which not only significantly contribute to overall R but also introduce marked flow (V')-dependent changes. We employed intrabreath oscillometry in casts of the upper airways constructed from head CT images of 46 infants. We examined oscillometric nasal resistance (R) in upper airway casts with no respiratory flow (R) and the effect of varying V' on R by simulating tidal breathing.

Bio-mining of Lanthanides from Red Mud by Green Microalgae.

Red mud is a by-product of alumina production containing lanthanides. Growth of green microalgae on red mud and the intracellular accumulation of lanthanides was tested. The best growing species was (2.