title: Extruded-expanded polystyrene a smear material for use in liquid scintillation counting.
mesh_terms: D004583:Electrons; D005898:Glass; D010209:Paper; D011137:Polystyrenes; D011834:Radiation Monitoring / Q000295:instrumentation*; D012588:Scintillation Counting; D013936:Thymidine; D014316:Tritium
chemical_list: D011137:Polystyrenes; D014316:Tritium; D013936:Thymidine