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Ahn, D.U. & Nam, K.C. (2004): Effects of ascorbic acid and antioxidants on color, lipid oxidation and volatiles of irradiated ground beef. Radiat. Phys. Chem. , 71 , 149

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Diehl, J.F. (1995): Safety of irradiated foods . 2nd ed., Marcel Dekker, Inc., New York, Basel, Hong Kong, 345 pages Diehl JF Safety of irradiated foods

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Ahen, D.U., Jo, C. & Olson, D.G. (2000): Analysis of volatile compounds and the sensory characteristics of irradiated pork. Meat Sci. , 54 , 209

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Abstract  

Dehydration of irradiated and non-irradiated asparagine monohydrate was investigated by means of a computer interfaced PerkinElmer 1B DSC in isothermal conditions and static atmosphere. Isothermal runs were performed at 358, 363, 368 and 373 K. Samples were γ-irradiated at room temperature, using a 137Cs source with an activity of 3·1013 Bq and a dose rate of 4·102 Gy h−1, with irradiation times between 8–116 h. Isothermal kinetics were analyzed via the common factorized rate equation. Šesták-Berggren conversion function was found to best fit the experimental data. Of the three fitting parameters, only the one associated with the activation energy was found to follow a coherent variation with the exposure time. Even within this simple model, that makes the activation energy a useful stability criterion within a set of similar samples.

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treatment among them is processing with ionizing radiation [ 6 ]. The ionizing radiations originated from gamma rays are produced by radioactive substances (radioisotopes). The approved sources of gamma rays for food irradiation are the radionuclides cobalt

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Abstract  

The purpose of the present work deals with the evaluation of the electron beam irradiation effects on some natural products based on thermal analysis. Some natural products with therapeutic contributions (artichoke, sea buckthorn, common sage, stonebreaker and cloves) were irradiated with doses up to 9 kGy using accelerated electron beam. The thermal profiles lead to identify three phenomena: dehydration — volatilization, irreversible degradation — molecular reorganization and residue decomposition. The radio-induced degradations determine slight shifts of the temperatures where these phenomena occur. The energetic value of the studied products is affected by e-beam treatment depending on irradiation dose.

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Acta Physiologica Hungarica
Authors: A Todorović, A Todorović, A Todorović, S Pejić, S Pejić, S Pejić, J Kasapović, J Kasapović, J Kasapović, V Stojiljković, V Stojiljković, V Stojiljković, SB Pajović, SB Pajović, SB Pajović, DT Kanazir, DT Kanazir and DT Kanazir

In order to examine if differences in activity and inducibility of antioxidative enzymes in rat cerebral cortex and hippocampus are underlying their different sensitivity to radiation, we exposed four-day-old female Wistar rats to cranial radiation of 3 Gy of g-rays. After isolation of hippocampus and cortex 1 h or 24 h following exposure, activities of copper-zinc superoxide dismutase (CuZnSOD), manganese superoxide dismutase (MnSOD) and catalase (CAT) were measured and compared to unirradiated controls. MnSOD protein levels were determined by SDS-PAGE electrophoresis and Western blot analysis. Our results showed that CuZnSOD activity in hippocampus and cortex was significantly decreased 1 h and 24 h after irradiation with 3 Gy of g-rays. MnSOD activity in both brain regions was also decreased 1 h after irradiation. 24 h following exposure, manganese SOD activity in hippocampus almost achieved control values, while in cortex it significantly exceeded the activity of the relevant controls. CAT activity in hippocampus and cortex remained stable 1 h, as well as 24 h after irradiation with 3 Gy of g-rays. MnSOD protein level in hippocampus and cortex decreased 1 h after irradiation with 3 Gy of g-rays. 24 h after exposure, MnSOD protein level in cortex was similar to control values, while in hippocampus it was still significantly decreased. We have concluded that regional differences in MnSOD radioinducibility are regulated at the level of protein synthesis, and that they represent one of the main reasons for region-specific radiosensitivity of the brain.

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Bagi, G., Bornemisza-Pauspertl, P., Hidvegi, E. J. (1988): Inverse correlation between growth and degrading enzyme activity of seedlings after gamma and neutron irradiation of pea seeds. Int. J. Radiat. Biol

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Abstract  

The effect of high energy irradiation on various starch samples was studied.

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Jaakola, A., Heikkonen, J., Tomilla, P. és mtsai: Strontium plaque irradiation of subfoveal neovascular membranes in age-related macular degeneration. Graefes Arch. Clin. Exp. Ophthalmol., 1998, 236 , 24

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