食品照射
Online ISSN : 1884-3611
Print ISSN : 0387-1975
ISSN-L : 0387-1975
40 巻, 1-2 号
選択された号の論文の7件中1~7を表示しています
  • 片山 豪, 中馬 誠, 等々力 節子, 多田 幹郎
    2005 年 40 巻 1-2 号 p. 1-6
    発行日: 2005/09/30
    公開日: 2010/06/28
    ジャーナル フリー
    Changes in functional properties of pectin extracted from sugar beet or citrus peel by electron beam in solid state or aqueous solution were investigated. Citrus pectin (CP) was degraded at both solid state and aqueous solution by irradiation with electron beam. Sugar beet pectin (SBP) was degraded at solid state but in aqueous solution at high concentrate was polymerized by irradiation with electron beam. SBP polymerized by electron beam formed hydrogel.This hydrophilic polymer was useful as water absorbent. Moreover, it was confirmed that the emulsification stability and acidified milk beverage stabilization of SBP was enhanced by electron beam.
  • 後藤 典子, 宮川 弘之, 藤沼 賢司, 小沢 秀樹
    2005 年 40 巻 1-2 号 p. 7-10
    発行日: 2005/09/30
    公開日: 2010/06/28
    ジャーナル フリー
    Meats, for example, lamb, razorback, wild duck and turkey were irradiated by gamma ray, and the amounts of hydrocarbons formed from fatty acids were measured. Since C20: 0 was found from wild duck and turkey, C1-18: 1 was recommended for internal standard. Good correlation was found between the amount of hydrocarbons and the doses of gamma irradiation. This study shows that such hydrocarbons induced after radiation procedure as C1, 7-16: 2, C8-17: 1, C1-14: 1and C15: 0 may make it possible to detect irradiated lamb, razorback, wild duck and turkey.
  • 後藤 典子, 萩原 昌司, 等々力 節子, 本田 克徳, 山崎 正夫, 関口 正之, 水野 弘明
    2005 年 40 巻 1-2 号 p. 11-14
    発行日: 2005/09/30
    公開日: 2010/06/28
    ジャーナル フリー
    Photostimulated luminescence (PSL) method provides a rapid and markedly sensitive technique to detect of any irradiated food that contain minerals. This method is also convenient as a first screening means in comparison with thermoluminescence (TL) method which requires separating minerals from the food materials. The present study reports the results of PSL measurements for both irradiated and non-irradiated powdered dry leaf vegetable obtained with the prototype of PSL system developed by our groups. This PSL system consists of pulsed Infra-Red (IR) source for photostimulation, single photon counting system for high sensitive detection of luminescence, and computer for data treatments. The PSL intensity of the leaf vegetable increased with increase of gamma radiation dose and show a linear relationship up to a dose of 1kGy. The PSL intensities after four months of storage under light shielding following gamma irradiation (0.49-3.1kGy) decreased to less than half of initial intensities. The PSL intensities of those decreased rapidly for 60 seconds and reached a steady level close to intensity of non-irradiated sample after 300 seconds following photostimulation. We used the information on the shape and slope of PSL intensity curve as a criteria to discriminate whether irradiated foods or not, and possible to detect the irradiation history of food irradiated with a 0.49kGy dose after four months of storage.
  • 後藤 典子, 山崎 正夫
    2005 年 40 巻 1-2 号 p. 15-18
    発行日: 2005/09/30
    公開日: 2010/06/28
    ジャーナル フリー
    As paper has high content of cellulose, sensibility of ESR measurements of paper should be high. We examined stability of ESR signals in irradiated recycled copying paper, and estimated the possibility to utilize ESR measurement of paper for the detection of irradiated food. Cellulose radicals in paper irradiated at 1kGy and stored at 40°C in water was detected for 20 days. Cellulose radicals in irradiated paper stored at 90°C in water were more stable than that stored in air. ESR measurements of 50mg paper are simple and easy, so ESR measurement of rapping paper or corrugated box is good screening method for the detection of irradiated food.
  • 坂部 寛, 斉藤 希巳江, 等々力 節子
    2005 年 40 巻 1-2 号 p. 19-24
    発行日: 2005/09/30
    公開日: 2010/06/28
    ジャーナル フリー
    Thermoluminescence (TL) method has been used for detection of irradiated foods which are contaminated with silicate minerals. After the first TL measurement, minerals are re-irradiated with 60Co-γ-rays for normalization and the first and second glow curves are compared. In the present study, the TL glow curves were investigated for quartz sand and minerals isolated from pepper and potato after the irradiation with gamma and 70keV of X-ray, in order to know the possibility of whether to be able to use X-rays as re-radiation source for normalization. Glow curves of samples irradiated with X-rays showed same shape and peak position as those irradiated with 60Co-γ-rays, but large difference in intensity. The intensity of TL glow curve for X-ray was significantly larger than that for γ-rays. These results indicate that X-ray irradiation has a potential to apply for the confirmation of mineral isolation due to higher TL intensity, and as a reradiation source.
  • 須永 博美
    2005 年 40 巻 1-2 号 p. 25-47
    発行日: 2005/09/30
    公開日: 2011/07/04
    ジャーナル フリー
  • 等々力 節子
    2005 年 40 巻 1-2 号 p. 49-58
    発行日: 2005/09/30
    公開日: 2010/06/28
    ジャーナル フリー
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