title: Separation of neutral nitrogen compounds from synthetic crude oils for biological testing.
mesh_terms: D003031:Coal; D008401:Gas Chromatography-Mass Spectrometry; D006571:Heterocyclic Compounds / Q000302:isolation & purification*; D006838:Hydrocarbons / Q000302:isolation & purification*; D009152:Mutagenicity Tests / Q000379:methods; D009584:Nitrogen / Q000302:isolation & purification*; D009821:Oils / Q000032:analysis*; D012486:Salmonella typhimurium / Q000235:genetics
chemical_list: D003031:Coal; D006571:Heterocyclic Compounds; D006838:Hydrocarbons; D009821:Oils; D009584:Nitrogen