"The phrase \"integral_wrt_X_of_Y\" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. The phrase \"wrt\" means \"with respect to\". \"Radioactivity\" means the number of radioactive decays of a material per second. \"Radioactivity concentration\" means radioactivity per unit volume of the medium. \"Zr\" means the element \"zirconium\" and \"93Zr\" is the isotope \"zirconium-93\" with a half-life of 3.47e+08 days."@en . "SDN:P07::0RPKJ8PC" . . "1" . "1" . . "SDN:P07::0RPKJ8PC" . . . "2018-02-12 16:53:18.0" . "" . "SDN:P07::0RPKJ8PC" . . "accepted"@en . . "integral_wrt_time_of_radioactivity_concentration_of_93Zr_in_air"@en . "false" . "2018-02-12 16:53:18.0" .