TY - JOUR T1 - Effect of Ultrasound on the Permeability of Silicone Rubber Membranes JF - PDA Journal of Pharmaceutical Science and Technology JO - PDA J Pharm Sci Technol SP - 206 LP - 209 VL - 37 IS - 6 AU - Neil R. Anderson AU - Wendy A. Preston Y1 - 1983/11/01 UR - http://journal.pda.org/content/37/6/206.abstract N2 - The diffusion of methylparaben through silicone rubber membranes was followed with and without ultrasound. Ultrasound sources (5 MHz and 2.25 MHz) were used to irradiate the membranes normal to the membranes and in the same direction as diffusion flow. The data presented shows no apparent effect of ultrasound on silicone membrane permeability. ER -