. "SDN:P01::METHDLTX" . "SDN:P01::METHDLTX" . . "The concentration of methionine in any body of salt or fresh water estimated from dilution experiments following the protocol of Zubkov et al. (2007)"@en . "2" . "SDN:P01::METHDLTX" . "2015-07-29 16:27:05.0" . "false" . . "accepted"@en . . . . . "methionine_conc_ambient" . "Concentration of methionine (bioavailable) {CAS 59-51-8} per unit volume of the water body [dissolved plus reactive particulate <0.2um phase] by isotopic dilution time-series incubations, filtration and counting residue and calculation from regression of radioactivity against incubation time for each dilution and extrapolation to ambient concentration"@en . . . . "2015-07-29 16:27:05.0" . "2" .