. . . "1" . "The surface called \"surface\" means the lower boundary of the atmosphere. \"Content\" indicates a quantity per unit area. \"Radioactivity\" means the number of radioactive decays of a material per second. \"Cd\" means the element \"cadmium\" and \"115Cd\" is the isotope \"cadmium-115\" with a half-life of 2.23e+00 days."@en . . "1" . "SDN:P07::18GSR3VF" . . "SDN:P07::18GSR3VF" . "2018-02-12 16:53:18.0" . "surface_radioactivity_content_of_115Cd"@en . "false" . "" . "accepted"@en . . "SDN:P07::18GSR3VF" . "2018-02-12 16:53:18.0" .