Before revision:  While the former determines transport pathways via molecular contacts , the latter reflects the ruggedness of the landscape for local motion of atoms and molecular fragments . Unlike transport through small-molecule systems, such as alkanes, nonlinearity dominates over coherent processes at even quite short time- and length-scales.
After revision:  While the former determines transport pathways via molecular contacts , the latter reflects frustration within the landscape for local motion of atoms and molecular fragments . Unlike transport through small-molecule systems, such as alkanes, nonlinearity dominates over coherent processes at even quite short time- and length-scales.