Browsing by Author "Rossiter, V."

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    Reversible Temperature Dependent Spectral Shift in the Infrared Spectrum of DNA (Na) in the Dry Solid State
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1977, 73 (2), 1977) Rossiter, V.
    The unpolariscd infrared spectrum of freeze-dried layers of calf thymus DNA(Na) has been recorded over the range from 4000 cm-1 to 625 cm-1 at temperatures between — 45CC and + 95CC. Throughout the temperature variations, the samples were maintained in a very dry state. The position of the absorption band at approximately 1230 cm-1 is shown to depend on temperature and to be capable of a reversible shift over a range of ~16 cm-1. The results arc compared with previously published low-frequency dielectric measurements on similar samples and with polarised infrared measurements showing the influence of changes in relative humidity on the structure of DNA salts.