title: [Preliminary studies on the bacterial substance extracted from oral gram-negative bacteria].
mesh_terms: D008070:Lipopolysaccharides / Q000032:analysis; D008074:Lipoproteins / Q000032:analysis; D009055:Mouth / Q000382:microbiology; D009343:Neisseria / Q000032:analysis
chemical_list: D008070:Lipopolysaccharides; D008074:Lipoproteins