. "accepted"@en . . . . . . "2019-03-04 17:29:46.0" . "SDN:P07::CF12N406" . . "mass_fraction_of_nox_expressed_as_nitrogen_in_air"@en . . "\"Mass fraction\" is used in the construction \"mass_fraction_of_X_in_Y\", where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical or biological species denoted by X may be described by a single term such as \"nitrogen\" or a phrase such as \"nox_expressed_as_nitrogen\". The term \"peroxy_radicals\" means all organic and inorganic peroxy radicals. This includes HO2 and all organic peroxy radicals, sometimes referred to as RO2. In chemistry, a \"radical\" is a highly reactive, and therefore short lived, species."@en . "2" . "2019-03-04 17:29:46.0" . "false" . . "SDN:P07::CF12N406" . "2" . "" . "SDN:P07::CF12N406" .