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- W2057790147 abstract "Poly(L-Phenylalanine) is the simplest polypeptide which goes into the rare ω form. Complete normal mode calculations and their dispersions are reported using Urey Bradley force field and Higgs method for infinite systems. The results indicate that the modes below 1350 cm -1 show appreciable dispersion. Two main chacteristics of the dispersion curves are cross-over between torsional and bending modes at δ=ψ/2 and repulsion with character exchange between junction and ring modes in the neighbourhood of δ=ψ. The crossover within the Brillouin Zone (B-Z) is permissible between different species at the same frequency and it can be called as a lqlqnonfundamental resonancerqrq. The regions of high density of states in the neighbourhood of δ=0.75 π are critical points akin to Von Hove Singularities in lattice dynamics. Detailed assignments of various modes are also given." @default.
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- W2057790147 date "1995-01-15" @default.
- W2057790147 modified "2023-10-16" @default.
- W2057790147 title "Phonon Dispersion in ω Helical Poly-L-Phenylalanine" @default.
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- W2057790147 doi "https://doi.org/10.1143/jpsj.64.308" @default.
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