title: ULTRACENTRIFUGAL FRACTIONATION OF REACTANTS IN A  GEL-DIFFUSION PRECIPITIN TECHNIQUE IN STEPHANURIASIS.
mesh_terms: D000818:Animals; D005779:Immunodiffusion; D009349:Nematode Infections; D011233:Precipitin Tests; D011234:Precipitins; D012106:Research; D013553:Swine Diseases; D014461:Ultracentrifugation
chemical_list: D011234:Precipitins
keywords: EXPERIMENTAL LAB STUDY; GEL DIFFUSION TESTS; NEMATODE INFECTIONS; PRECIPITIN TESTS; SWINE DISEASES; ULTRACENTRIFUGATION