"1" . "2018-02-12 16:53:18.0" . . . "" . "SDN:P07::11HZCKVD" . "accepted"@en . "2018-02-12 16:53:18.0" . . "1" . "false" . . . "radioactivity_concentration_of_110mAg_in_air"@en . "SDN:P07::11HZCKVD" . "SDN:P07::11HZCKVD" . . "\"Radioactivity\" means the number of radioactive decays of a material per second. \"Radioactivity concentration\" means radioactivity per unit volume of the medium. \"Ag\" means the element \"silver\" and \"110mAg\" is the metastable state of the isotope \"silver-110\" with a half-life of 2.70e+02 days."@en .