. "SDN:P07::2EYUPG1C" . . "2018-02-12 16:53:18.0" . "SDN:P07::2EYUPG1C" . . "1" . . "SDN:P07::2EYUPG1C" . . "2018-02-12 16:53:18.0" . . "1" . "\"Radioactivity\" means the number of radioactive decays of a material per second. \"Radioactivity concentration\" means radioactivity per unit volume of the medium. \"La\" means the element \"lanthanum\" and \"143La\" is the isotope \"lanthanum-143\" with a half-life of 9.72e-03 days."@en . "radioactivity_concentration_of_143La_in_air"@en . "false" . "" . "accepted"@en .