( ( Losses ( in ( ( the ( potential term ) ) ( through overpotentials ) ) ) ) ( ( are ( described ( by ( voltage efficiency ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Losses)) (PP (IN in) (NP (NP (DT the) (JJ potential) (NN term)) (PP (IN through) (NP (NNS overpotentials)))))) (VP (VBP are) (VP (VBN described) (PP (IN by) (NP (JJ voltage) (NN efficiency))))) (. .)))
Losses in the potential term through overpotentials are described by voltage efficiency.
(ROOT (S (NP (NP (DT The) (NN difference)) (PP (IN between) (NP (NP (DT the) (JJ theoretical) (JJ half-reaction) (NN reduction) (NN potential)) (CC and) (NP (NP (DT the) (JJ actual) (NN voltage)) (VP (VBN required)))))) (VP (VBZ is) (VP (VBN called) (S (ADJP (JJ overpotential))))) (. .)))