title: Antigen-antibody reactions in agar. IX. Treatment of antisera and optical densities of precipitin reactions.
mesh_terms: D000818:Animals; D000937:Antigen-Antibody Reactions; D003165:Complement System Proteins / Q000032:analysis; D003720:Densitometry; D005615:Freezing; D007106:Immune Sera / Q000032:analysis; D005779:Immunodiffusion; D011233:Precipitin Tests; D011817:Rabbits
chemical_list: D007106:Immune Sera; D003165:Complement System Proteins