"2018-02-12 16:53:18.0" .
"SDN:P07::2UWOLA6D" .
"" .
"false" .
.
"SDN:P07::2UWOLA6D" .
"1" .
"accepted"@en .
.
.
"1" .
"2018-02-12 16:53:18.0" .
.
.
"\"Radioactivity\" means the number of radioactive decays of a material per second. \"Radioactivity concentration\" means radioactivity per unit volume of the medium. \"Cf\" means the element \"californium\" and \"251Cf\" is the isotope \"californium-251\" with a half-life of 2.92e+05 days."@en .
.
"radioactivity_concentration_of_251Cf_in_air"@en .
"SDN:P07::2UWOLA6D" .