title: Nuclear magnetic resonance. Sample preparation.
authors: N J
authors: NJ
authors: Oppenheimer
mesh_terms: D002850:Chromatography, Gel / Q000295:instrumentation / Q000379:methods; D005612:Freeze Drying; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D009696:Nucleic Acids / Q000302:isolation & purification; D011506:Proteins / Q000302:isolation & purification
chemical_list: D009696:Nucleic Acids; D011506:Proteins