Observation of Several Detection Factors Derived from Thermoluminescence of Mineral Separated from Irradiated Korean Sesame and Perilla Seeds Stored under Different Storage Conditions원문보기
Oh, Man-Jin
(Department of Food Science and Technology, Changnam National University)
,
Yi, Sang-Duk
(Department of Food Science and Technology, Changnam National University)
,
Yang, Jae-Seung
(Detection Lab. of Irradiated Food, Kora Atomic Energy Research Institute)
This study was carried out to observe changes in several detection factors derived from thermoluminescence (TL) of minerals separated from irradiated Korean perilla and sesame seeds during storage under normal room and darkroom conditions. The TL intensities of the first glow curves increased from 0...
This study was carried out to observe changes in several detection factors derived from thermoluminescence (TL) of minerals separated from irradiated Korean perilla and sesame seeds during storage under normal room and darkroom conditions. The TL intensities of the first glow curves increased from 0 to 5 kGy but only slightly increase from 5 to 10 kGy. Maximum TL temperatures of the first glow curves in all irradiated samples were around 20$0^{\circ}C$, ranging from 150 to 25$0^{\circ}C$. Since the control (0 day of storage) glow curve ratios of G3 and G4, calculated from re-irradiated (1 kGy) sample were over 0.5, detection of irradiation was possible. However, because Gl ratios were below 0.1, they were classified as non-irradiated. There was n unique first glow curve shape that could be clearly seen in all irradiated samples, regardless of storage conditions, that was never seen in non-irradiated samples. In all samples, the maximum TL temperatures and shape of the second glow curve was in a lower temperature range than that of the first glow curve. Therefore, detection of irradiated Korean perilla and sesame seeds was possible fur up to 3 months after irradiation, regardless of storage conditions, by examining several TL detection factors; including TL intensity, glow curve ratios maximum TL temperatures, and the shapes of glow curves.
This study was carried out to observe changes in several detection factors derived from thermoluminescence (TL) of minerals separated from irradiated Korean perilla and sesame seeds during storage under normal room and darkroom conditions. The TL intensities of the first glow curves increased from 0 to 5 kGy but only slightly increase from 5 to 10 kGy. Maximum TL temperatures of the first glow curves in all irradiated samples were around 20$0^{\circ}C$, ranging from 150 to 25$0^{\circ}C$. Since the control (0 day of storage) glow curve ratios of G3 and G4, calculated from re-irradiated (1 kGy) sample were over 0.5, detection of irradiation was possible. However, because Gl ratios were below 0.1, they were classified as non-irradiated. There was n unique first glow curve shape that could be clearly seen in all irradiated samples, regardless of storage conditions, that was never seen in non-irradiated samples. In all samples, the maximum TL temperatures and shape of the second glow curve was in a lower temperature range than that of the first glow curve. Therefore, detection of irradiated Korean perilla and sesame seeds was possible fur up to 3 months after irradiation, regardless of storage conditions, by examining several TL detection factors; including TL intensity, glow curve ratios maximum TL temperatures, and the shapes of glow curves.
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가설 설정
3)The first and second glow curves measured after storage during 3 months under darkroom condition.
B: The firstglow curve of minerals separated from samples irradiated at 1 kGy.
C: The firstglow curve of minerals separated from samples irradiated at 5 kGy.
D: The firstglow curve of minerals separated from samples irradiated at 10 kGy.
제안 방법
2and 3). Since irradiated samples had the unique first glow curves when heated to around 200℃, but not non-irradiated samples did not, detection of irradiation was possible by comparing the unique first glow curves.
1 (4, 15-17). Therefore, to confirm that the published range is ideal for glow curve ratio determination in oil seeds, re-irradiation was performed at 1, 5 and 10 kGy and the conesponding glow curve ratios were calculated. Gl, which was calculated from non-irradiated samples, were below 0.
이론/모형
Evaluation of the data was carried out according to DIN EN 1788 (4) and the method ofYi and Yang (7, 16, 17).
The preparation of mineral samples was carried out according to method DIN EN 1788 (4) as previously described by Yi et al. (15).
성능/효과
Shapes of the first and second glow curves of minerals separated from irradiated perilla and sesame seeds were not significantly different regardless of TL intensity. When TL intensity of the first glow curves measured immediately after irradiation was compared with the first glow curves measured after 3 months of storage under either room conditions, identification of the unique first glow curves was possible, even though the heights of the first glow curves were lower. Sesame seeds stored for 3 months in a darkroom had the first glow curves that were clearer and higher than those stored under normal conditions, but the storage effect was opposite in perilla seeds.
참고문헌 (20)
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