Overall chemical results for prestellar core Model full with variable E_D and other features enabled. Panel a: abundance of the primary gaseous species relative to that of H₂. Panel b: species that are abundant in ices; solid lines are for the gas phase, while dashed lines are for solid phase abundances, relative to H₂. Panel c: percentage, relative to H₂O ice, for major icy molecules. The black curve is the average ice thickness $\overline{b}$ on grains.