"2009-07-06 15:41:29.0" . . "1" . "SDN:P07::CF12N681" . . "\"tendency_of_X\" means derivative of X with respect to time. The construction \"atmosphere_moles_of_X\" means the total number of moles of X in the entire atmosphere, i.e. summed over the atmospheric column and over the entire globe. The chemical symbol for atomic nitrogen is N."@en . . "1" . "SDN:P07::CF12N681" . . . "tendency_of_atmosphere_moles_of_atomic_nitrogen"@en . "" . . . "2009-07-06 15:41:29.0" . . "false" . "SDN:P07::CF12N681" . "accepted"@en .