Comparison of γ-radiation and electron beam irradiation effects on gelatin |
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Authors: | Fernando F Vieira and Nelida L Del Mastro |
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Institution: | Department of Nuclear Techniques Applications, IPEN-CNEN/SP, Travessa R, 400 Cidade Universitaria, 05508-900 São Paulo, SP, Brazil |
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Abstract: | Gelatin is a heterogeneous mixture of water-soluble proteins of high average molecular weight derived by hydrolytic action from collagen, a protein of mammal external protective tissues. There are many characteristics of a material that can indicate its quality or performance in its intended use. The knowledge of a material's rheological characteristics is valuable to predict its pourability, its performance in a dipping or coating operation or the ease with which it may be handled, processed or used. In this work bovine powder gelatin was submitted to γ-radiation from a 60Co source, dose rate about 7 kGy/h and to electron beam irradiation, dose rate about 11 kGy/s. The doses applied were 5, 10, 20 and 50 kGy. The radiation effects were measured following viscosity changes at 40°C of gelatin powder 10% aqueous solutions. The relationship between the decrease in viscosity of gelatin solutions and radiation dose presented close comparable values for both irradiation processes. |
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Keywords: | Gelatin Ionizing radiation Viscosity |
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