title: Studies of molecular association in biological systems by positron annihilation techniques.
mesh_terms: D002082:Butylamines; D055598:Chemical Phenomena; D002621:Chemistry; D002762:Cholecalciferol; D007211:Indoles; D008433:Mathematics; D014810:Vitamin E; D014812:Vitamin K
chemical_list: D002082:Butylamines; D007211:Indoles; D014812:Vitamin K; D014810:Vitamin E; D002762:Cholecalciferol