"2018-02-12 16:53:18.0" . "SDN:P07::0ZBVYBT4" . "1" . "SDN:P07::0ZBVYBT4" . "false" . "" . "accepted"@en . "\"Radioactivity\" means the number of radioactive decays of a material per second. \"Radioactivity concentration\" means radioactivity per unit volume of the medium. \"Bi\" means the element \"bismuth\" and \"214Bi\" is the isotope \"bismuth-214\" with a half-life of 1.37e-02 days."@en . . . "2018-02-12 16:53:18.0" . . "radioactivity_concentration_of_214Bi_in_air"@en . "1" . . . . "SDN:P07::0ZBVYBT4" .