title: The localization of diffusible substances. Experience in the electron microscope.
mesh_terms: D004058:Diffusion; D004577:Electron Probe Microanalysis; D004912:Erythrocytes / Q000648:ultrastructure*; D005615:Freezing; D006801:Humans; D007501:Iron / Q000097:blood*; D008854:Microscopy, Electron; D010949:Plasma / Q000032:analysis*
chemical_list: D007501:Iron