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- W2040783029 abstract "The structural changes of human erythrocyte membranes after X-irradiation were investigated with the aid of fluorescent probes. It was found that the fluorescence characteristics (intensity, polarization and the dissociation constant) of 1-anilino-8-naphthalene sulphonate (ANS) bound to X-irradiated (up to 40 Gy) membranes were quite different from those in unirradiated ones. Sulphydryl (SH)-oxidizing reagents showed the same effects as X-rays on the ANS fluorescence. In addition, pretreatment of the membranes with SH reagents completely blocked the radiation-induced fluorescence changes. These results demonstrated that the initial cause of the radiation effect on membranes is the oxidation of membrane SH groups. There were two different steps in the development of the radiation effect on membrane structure; one is the radiation chemical reaction of SH groups, which is independent of the post-irradiation incubation temperature, and the other is markedly influenced by the temperature, particularly between 12 and 26 degrees C. Therefore it was concluded that structural disorganization of the membranes, including rearrangement of membrane components, might take place following exposure to radiation. This was supported by the fact that treatment with detergents mimicked the effect of X-irradiation. The reaction of OH and/or O2- from the aqueous environment was shown to be responsible for the membrane effect of radiation." @default.
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- W2040783029 date "1984-01-01" @default.
- W2040783029 modified "2023-10-13" @default.
- W2040783029 title "Studies on the Mechanism of Radiation-induced Structural Disorganization of Human Erythrocyte Membranes" @default.
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- W2040783029 doi "https://doi.org/10.1080/09553008414551671" @default.
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