CaprolactamAmmonium SulfateQuaternary Ammonium CompoundsFractional PrecipitationChemical PrecipitationChromatography, GelChromatography, Ion ExchangeChromatographyMolecular WeightSulfatesHydrogen-Ion ConcentrationElectrophoresis, Polyacrylamide GelChemistry Techniques, AnalyticalAmmonium ChlorideBiochemical PhenomenaChromatography, DEAE-Cellulose