"1" . . "" . "surface_radioactivity_content_of_255Es"@en . . . "false" . . "accepted"@en . "2018-02-12 16:53:18.0" . "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 \"255Es\" is the isotope \"einsteinium-255\" with a half-life of 3.84e+01 days."@en . . . "SDN:P07::6ZOFSSTT" . "2018-02-12 16:53:18.0" . "SDN:P07::6ZOFSSTT" . "1" . "SDN:P07::6ZOFSSTT" .