食品照射

報文

長期間保存した照射黒胡椒のラジカル

亀谷宏美, 鵜飼光子

2009 年 44 巻 1_2 号 p. 1-4
発行日: 2009年
公開日: 2011/11/25

DOIhttps://doi.org/10.5986/jrafi.44.1

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Using ESR the radiation induced radicals of black pepper after long-term storage were studied. Upon gamma ray irradiation, new signals were detected as twin peaks. It was revealed that these signals were very stable after the six month storage. We concluded that radiation induced new signals are very useful to know that the black pepper was irradiated or not.

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照射誘導ラジカルの緩和現象

小川英之, 鵜飼光子, Lund A., 下山雄平

2009 年 44 巻 1_2 号 p. 5-8
発行日: 2009年
公開日: 2011/11/25

DOIhttps://doi.org/10.5986/jrafi.44.5

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Electron spin relaxation behaviours of radiation induced radicals were studied by the continous microwave saturation method of electron spin resonance (ESR) spectra. Radiation induced radicals in nutmeg yielded a sharp and intense ESR signal at g = 2.0. By the progressive saturation procedure, we could evaluate relaxation times (T1 and T2). The computer program to analyze the ESR line shape using all data points on a saturation curve was applied. Based on the theoretical analysis, the relaxation behaviors of radiacals were revealed. Radiation induced radicals of the specimens yielded relaxation times, T1 in the μsec and T2 in nsec ranges, respectively. Upon the irradiation, T1 shortened, and T2 lengthened. The progressive saturation curve was changed by the irradiation.

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照射マンゴーに誘起されるラジカルの緩和現象

菊地正博, 小川英之, 森下憲雄, 鵜飼光子, 小林泰彦, 下山雄平

2009 年 44 巻 1_2 号 p. 9-13
発行日: 2009年
公開日: 2011/11/25

DOIhttps://doi.org/10.5986/jrafi.44.9

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Using the γ-irradiated fresh mangoes followed by freeze-drying and powderization, electron spin resonance spectrometry of specimens was performed. As a result, a strong single peak in the flesh, the pericarp and the seed was observed at g=2.004 and attributed to organic free radicals. When relaxation times of the peak was calculated using the method of Lund et al., T₂ showed dose responses according to increasing doses while T₁ was almost constant. Dose responsibility of the relaxation time T₂ obtained from flesh specimens of the mangoes could be measured regardless of the preservation period of 1 to 9 days following γ-irradiation. Therefore, there might be possible to detect the irradiation treatment of fresh mangoes using relaxation time T₂.

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乾燥唐辛子で飼育したタバコシバンムシに対するガンマ線の効果

今村太郎, 宮ノ下明大, 等々力節子

2009 年 44 巻 1_2 号 p. 14-16
発行日: 2009年
公開日: 2011/11/25

DOIhttps://doi.org/10.5986/jrafi.44.14

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Effect of gamma irradiation on the survival of the cigarette beetles reared on cayenne pepper was investigated. Gamma ray at a dose of 62 Gy completely killed eggs and larvae of the beetles. Some pupae survived at 540 Gy, but all pupae were killed at 1076 Gy.

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情報

学習指導要領改訂（2009）と放射線教育

桜庭一宏, 中村秀夫, 鵜飼光子

2009 年 44 巻 1_2 号 p. 17-23
発行日: 2009年
公開日: 2011/11/25

DOIhttps://doi.org/10.5986/jrafi.44.17

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The Courses of Study are provided as the standards for educational courses in all schools in Japan. The new Courses of Study have been started this year. In this research, we revealed the ways how to teach radiation using the Courses of Study (2009). Education for radiation was first opened for the third grade of secondary school children. The contents in terms of radiation education in this Courses of Study (2009) are the characterization and application of radiation. To promote this new study courses, the knowledge about radiation of young man and woman were also studied. We concluded it is necessary to start radiation education from elementary school. Furthermore to apply the Courses of Study effectively, we need the comments on radiation education from the researcher of radiation. After the comments, teachers are able to make precise educational materials for their own children.

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熱ルミネセンス（TL）法の原理と測定の実際

山崎正夫, 関口正之, 中川清子, 柚木俊二

2009 年 44 巻 1_2 号 p. 24-27
発行日: 2009年
公開日: 2011/11/25

DOIhttps://doi.org/10.5986/jrafi.44.24

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光ルミネッセンス（PSL）法の原理と測定の実際

萩原昌司, 鍋谷浩志, 等々力節子

2009 年 44 巻 1_2 号 p. 28-31
発行日: 2009年
公開日: 2011/11/25

DOIhttps://doi.org/10.5986/jrafi.44.28

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わが国における食品照射技術の検討状況

日本食品照射研究協議会　事務局

2009 年 44 巻 1_2 号 p. 32-42
発行日: 2009年
公開日: 2011/11/25

DOIhttps://doi.org/10.5986/jrafi.44.32

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