title: The validity of the ammonium sulphate precipitation technique of estimation of antibody amount and avidity.
mesh_terms: D000645:Ammonium Sulfate; D000704:Analysis of Variance; D000818:Animals; D000906:Antibodies / Q000032:analysis*; D000918:Antibody Specificity; D000937:Antigen-Antibody Reactions; D000942:Antigens, Bacterial; D011232:Chemical Precipitation; D004926:Escherichia coli / Q000276:immunology; D006801:Humans; D007457:Iodine Radioisotopes; D008722:Methods; D011817:Rabbits
chemical_list: D000906:Antibodies; D000942:Antigens, Bacterial; D007457:Iodine Radioisotopes; D000645:Ammonium Sulfate