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Biophysical Journal 16: 791-780 (1976)
© 1976 the Biophysical Society

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Radiation damage in tripalmitin layers studied by means of infrared spectroscopy and electron microscopy.

W Baumeister, U P Fringeli, M Hahn, F Kopp and J Seredynski

ABSTRACT

Structural deteriorations in biomembranes, as inevitably induced while structural information is gathered by electron optical methods, were evaluated by infrared spectroscopy. Tripalmitin model membranes were irradiated with 100 keV-electrons in an electron microscope. The intensity decay of group vibrations over the dose reveals the sequence of damage in the polar and nonpolar part of the molecule. The C-C backbone, being the most important structural feature, shows a significant latency effect up to 0.6 e-/A2 and is completely disordered by 3 e-/A2, corresponding to about three inelastic processes per molecule.




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Copyright © 1976 by the Biophysical Society.