In vitro and in vivo Evaluation of the Efficacy and Safety of Powder Hydroxypropylmethylcellulose as Nasal Mucosal Barrier

Figures & data

Figure 1 Graphical presentation of the experimental setup for diffusion inhibition by powder hydroxypropylmethylcellulose (pHPMC), with allergens and particulate matter (PM) 2.5 µm.

Figure 2 Cumulative volume (average) of successive powder batches over 2 years. It was analyzed by Beckman Coulter LS Particle size analyzer, Philadelphia, USA.

Figure 3 Particles constituting powder hydroxypropylmethylcellulose (pHPMC) in scanning electron microscope (100x magnification) indicates morphology as a key factor of deposition in the airway.