"SDN:P07::0EPCHOFP" . "1" . "2018-02-12 16:53:18.0" . "accepted"@en . . . "surface_radioactivity_content_of_254mEs"@en . "2018-02-12 16:53:18.0" . "SDN:P07::0EPCHOFP" . . "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. \"Es\" means the element \"einsteinium\" and \"254mEs\" is the metastable state of the isotope \"einsteinium-254\" with a half-life of 1.63e+00 days."@en . . "false" . . "SDN:P07::0EPCHOFP" . "1" . "" . .