title: [ESR-active (g equals 2.00) substance in biological materials. (Part 1) (author's transl)].
mesh_terms: D000818:Animals; D012831:Bombyx / Q000032:analysis; D001923:Brain Chemistry; D002286:Carcinoma, Ehrlich Tumor / Q000378:metabolism; D002642:Chick Embryo; D004578:Electron Spin Resonance Spectroscopy; D005260:Female; D008099:Liver / Q000032:analysis; D010063:Ovum / Q000032:analysis; D051381:Rats; D012617:Sea Urchins / Q000032:analysis; D013769:Tetrahymena pyriformis / Q000032:analysis; D014981:Xenopus