title: A study of barium sulphate preparations used as x-ray opaque media. I. Particle size and particle charge.
mesh_terms: D001466:Barium Sulfate / Q000494:pharmacology*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004355:Drug Stability; D004563:Electrochemistry; D004586:Electrophoresis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D013535:Suspensions
chemical_list: D013535:Suspensions; D001466:Barium Sulfate