title: In-beam electron ionization and mass analyzed ion kinetic energy studies on choline and several long chain aliphatic quaternary ammonium salts.
mesh_terms: D002794:Choline / Q000032:analysis*; D013058:Mass Spectrometry; D000644:Quaternary Ammonium Compounds / Q000032:analysis*
chemical_list: D000644:Quaternary Ammonium Compounds; D002794:Choline