... LLC142 Fate of Pharmaceuticals in the Environment and in Water Treatment Systems Oneofthemostchallengingaspectsofbatch,column ,and eld-scaleexperi-ments is the accurate quantication of low analyte ... their release into the environment. Over a 180-d anaerobicincubation in liquid swine manure, rst-order half-lives were estimated for erythro - mycin,roxithromycin,andsalinomycinof41d,130d ,and6 d,respectively,whereasnodegradationoftiamulinwasobserved.51 The ... resonance study of thesiteofmetalbindingintetracycline,J. Am. Chem. Soc., 97, 23 97, 1 975 .33. Case, C.L. and Carlson, M.S., Effect of feeding organic and inorganic sources of addi-tional zinc on growth...