the deuterium oxide perturbation difference spectrum , obtained at equilibrium , was found to contain two components that result from blue shifts of the adenine chromophore absorbance : ( 1 ) a shift cause by the substitution of deuterium for protium in the ring ( n1 ) nitrogen and exocyclic nitrogens , and ( 2 ) a shift associated with a change in the polarizability of the medium .
C0011745
deuterium oxide
C0011744
deuterium