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We prepared gelatin hydrogel cross-linked by γ-ray irradiation using a bovine type B gelatin. Relatively thermostable hydrogels were formed in the dose range over 16-20kGy in the gelatin solutions. The irradiated hydrogel became shrunk and exhibited the dose-dependent decrease of specific water contents. Absorption and release of methylene blue, a water-soluble dye, to the hydrogel were also characterized...
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