title: Resolution in EM autoradiography V: 45Ca (and 33P).
abstract: We devised a specimen to test EM autoradiographic resolution for calcium-45 (and phosphorous-33). A dry emulsion film was used for soluble compounds. We obtained a resolution (HD) value of 2300 +/- 500 A. This value is no larger than that previously obtained for Carbon -14, whose emission is about 1.6-fold lower. This result is as expected on theoretical grounds.
mesh_terms: D001345:Autoradiography / Q000379:methods; D002132:Calcium Radioisotopes; D004655:Emulsions; D006207:Half-Life; D008854:Microscopy, Electron; D010761:Phosphorus Radioisotopes; D012016:Reference Values
chemical_list: D002132:Calcium Radioisotopes; D004655:Emulsions; D010761:Phosphorus Radioisotopes