Text: LC50s for flow-through tests with Mysidopsis bahia and Cyprinodon variegatus were calculated two different ways -- (1) on the basis of the nominal toxicant concentrations (Nom), and (2) on the basis of measured (Meas) toxicant concentrations.
Entailment: One of the ways LC50s were calculated was with nomincal toxicant concentrations.
Contradiction: Toxins are great for the body.