  In the context of damage to DNA by low-energy electrons, we carry out
calculations of electron scattering from tetrahydrofuran and phosphoric acid,
models of the subunits in the DNA backbone, as a first step in simulating the
electron capture process that occurs in the cell. In the case of
tetrahydrofuran, we also compare with previous theoretical and experimental
data. A comparison of the shape of the resonant structures to virtual orbitals
is also performed to gain insight into the systematic connections with electron
scattering from similar molecules and dissociative electron attachment
experiments.
