SEARCH Articles Figures Tables LOAEL (lowest-observed-adverse-effect LOEC (lowest observed effects LUMO (lowest unoccupied electronic effects LUMO (lowest unoccupied substituent effects Lower lowest observable adverse effect level Lowest Observable Adverse Effect Level Lowest Observed Adverse Effect Lowest Observed Adverse Effect Level Lowest Observed Effect Level Lowest adverse effect level Lowest effect concentration level Lowest effect levels Lowest observable effect level Lowest observed adverse effect concentrations Lowest observed adverse effect concentrations LOAECs) Lowest observed adverse effect level LOAEL) Lowest observed effect concentration Lowest observed effect concentration LOEC) Lowest observed effect concentrations LOECs) Lowest observed effect level LOEL) Lowest-observable effect concentrations Lowest-observable effect concentrations LOECs) Lowest-observable-adverse-effect Lowest-observed-adverse-effect level LOAEL) benchmark