title: Permeability of films of ethyl cellulose and PEG to caffeine.
mesh_terms: D002110:Caffeine; D002482:Cellulose; D003692:Delayed-Action Preparations; D008722:Methods; D008970:Molecular Weight; D010539:Permeability; D011092:Polyethylene Glycols; D011108:Polymers
chemical_list: D003692:Delayed-Action Preparations; D011108:Polymers; D002110:Caffeine; D011092:Polyethylene Glycols; D002482:Cellulose