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We present a series of ab initio density functional based calculations of the fragmentation dynamics of core-ionized biomolecules. The computations are performed for pure liquid water, aqueous and isolated Uracil. Core ionization is described by replacing the 1s2 pseudopotential of one atom of the target molecule (C, N or O) with a pseudopotential for a 1s1 core-hole state. Our results predict that...