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Die Wirkung energiereicher Strahlen auf die Atmungsfermentkette

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Summary

The irradiation sensitivity of the cytochrome system was investigated, using as examples baker's yeast andE. coli. A method is described with which the proportion of reduced cytochrome in cell suspensions could be measured spectrometrically. In contrast to isolated cytochrome, which is easily oxydized by Roentgen rays, the cytochrome of living cells is very stable to Roentgen rays. The electrone transport is not influenced by high energy rays. It is probable that the hydrogen transport is also undisturbed. Only if the cell is so damaged by high doses of rays that every exchange of substances is impossible, i.e. if the cell is dead, is the ferrocytochrome oxydized and perhaps also destroyed. The oxydation is thus a secondary process resulting from death of the cell by rays. It is supposed that the changes in energy metabolism described in the literature, especially the disturbances of oxydative phosphorylation, are also secondary processes.

The concepts developed in radiochemistry on the action of high energy rays on organic compounds must therefore be especially tested in each case for their application in the living cell.

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Authors and Affiliations

  1. Radiologisches Institut der Universität Freiburg i. Br. und Biophysikalische Abteilung des Heiligenberg-Institutes, Heiligenberg (Baden)

    H. Langendorff & U. Hagen

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  1. H. Langendorff
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  2. U. Hagen
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Langendorff, H., Hagen, U. Die Wirkung energiereicher Strahlen auf die Atmungsfermentkette. Experientia 11, 485–489 (1955). https://doi.org/10.1007/BF02166833

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