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Journal Articles

Peak-fitting analysis with Gaussian line shapes against experimental ESR spectrum consisting of multiple peak

Kikuchi, Masahiro; Nagata, Natsuki*; Komoda, Seiichi*; Kameya, Hiromi*; Ukai, Mitsuko*; Kobayashi, Yasuhiko

Shokuhin Shosha, 50(1), p.13 - 19, 2015/10

no abstracts in English

Journal Articles

Performance evaluation of the European Committee Standardization Method EN1785 for the detection of irradiated processed food

Tsutsumi, Tomoaki*; Adachi, Rika*; Takatsuki, Satoshi*; Nei, Daisuke*; Kameya, Hiromi*; Todoriki, Setsuko*; Kikuchi, Masahiro; Kobayashi, Yasuhiko; Matsuda, Rieko*; Teshima, Reiko*

Shokuhin Shosha, 49(1), p.9 - 15, 2014/12

no abstracts in English

Journal Articles

Electron-spin relaxation times of irradiated fructose measured with pulsed ESR

Kikuchi, Masahiro; Kameya, Hiromi*; Shimoyama, Yuhei; Ukai, Mitsuko*; Kobayashi, Yasuhiko

JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 85, 2014/03

Journal Articles

Studies on the relaxation time of radicals in irradiated foods using pulse-ESR and CW-ESR

Kishida, Keigo*; Kawamura, Shoei*; Kameya, Hiromi*; Nakamura, Hideo*; Kikuchi, Masahiro; Kobayashi, Yasuhiko; Ukai, Mitsuko*

Radioisotopes, 63(3), p.131 - 137, 2014/03

Using Pulse-Electron Spin Resonance (Pulse-ESR) spectroscopy and Continuous Wave-Electron Spin Resonance (CW-ESR) spectroscopy, we revealed the relaxation time (T$$_{1}$$, T$$_{2}$$) of radicals induced in irradiated foods. The relaxation time was directly analyzed by Pulse-ESR. Using CW-ESR, the relaxation time was calculated by the measured spectrum parameter indirectly. We succeeded in the detection of Pulse-ESR signal of irradiated hard wheat flour and irradiated black pepper. It was suggested that using CW-ESR T$$_{1}$$ and T$$_{2}$$ can be calculated effectively, but the value was tend to slightly lower due to the parameters for calculation are affected by the contents of food especially protein.

Journal Articles

Electron-spin relaxation phenomena in irradiated saccharides detected by pulsed electron paramagnetic resonance spectroscopy

Kikuchi, Masahiro; Kameya, Hiromi*; Shimoyama, Yuhei; Ukai, Mitsuko*; Kobayashi, Yasuhiko

Radiation Physics and Chemistry, 81(10), p.1639 - 1645, 2012/10

 Times Cited Count:1 Percentile:11.68(Chemistry, Physical)

no abstracts in English

Journal Articles

Analysis of relaxation times of radicals in irradiated black pepper using pulse-ESR and CW-ESR

Kameya, Hiromi*; Kikuchi, Masahiro; Todoriki, Setsuko*; Furuta, Masakazu*; Kobayashi, Yasuhiko; Hara, Hideyuki*; Shimoyama, Yuhei; Ukai, Mitsuko*

Shokuhin Shosha, 47(1), p.6 - 10, 2012/09

no abstracts in English

Journal Articles

Relaxation behaviors of free radicals from $$gamma$$-irradiated black pepper using pulsed EPR spectroscopy

Kameya, Hiromi*; Kikuchi, Masahiro; Hara, Hideyuki*; Furuta, Masakazu*; Todoriki, Setsuko*; Kobayashi, Yasuhiko; Ukai, Mitsuko*; Shimoyama, Yuhei

Applied Magnetic Resonance, 42(2), p.153 - 159, 2012/03

 Times Cited Count:3 Percentile:22.91(Physics, Atomic, Molecular & Chemical)

no abstracts in English

Journal Articles

Initial decay process of radicals induced in irradiated food

Kaimori, Yoshihiko; Sakamoto, Yuki*; Kikuchi, Masahiro; Kameya, Hiromi*; Nakamura, Hideo*; Shimoyama, Yuhei; Kobayashi, Yasuhiko; Ukai, Mitsuko*

Shokuhin Shosha, 46(1), p.13 - 18, 2011/09

Journal Articles

Electron spin relaxation behaviors of radicals induced in $$gamma$$-irradiated food

Ukai, Mitsuko*; Kameya, Hiromi*; Nakamura, Hideo*; Kikuchi, Masahiro; Kobayashi, Yasuhiko

JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 84, 2011/01

Journal Articles

Detection of irradiated garlic blub using ESR spectroscopy, PSL and TL methods

Kameya, Hiromi*; Saito, Kimie*; Kikuchi, Masahiro; Kobayashi, Yasuhiko; Ukai, Mitsuko*; Todoriki, Setsuko*

Nihon Shokuhin Kagaku Kogakkai-Shi, 57(11), p.472 - 478, 2010/11

 Times Cited Count:1 Percentile:8.47(Food Science & Technology)

The detection methods of $$gamma$$ ray irradiated garlic blub were studied using electron spin resonance (ESR) spectroscopy, photo stimulated luminescence (PSL) and thermo luminescence (TL). The radiation source was $$^{60}$$Co, the dose level was 50 to 180 Gy. The ESR spectra were consisted of one singlet signal at $$g$$ = 2.00. Upon irradiation, the intensity of the singlet signal was increased. The intensity of PSL signals from stem of irradiated garlic blub was increased as compared with that from non irradiated ones. In TL measurement the glow 1 curves of irradiated samples exhibited a maximum at temperature range of 180 to 220$$^{circ}$$C, whereas those of the non irradiated samples were observed at about 300$$^{circ}$$C. TL glow ratios calculated over the temperature range of 150 to 250$$^{circ}$$C were significantly smaller in non irradiated samples than in irradiated samples after one year storage. Thus irradiated garlic blub was identified by the shape of TL glow 1 curves and TL glow ratios. We concluded ESR, PSL and TL are suitable for detection method of irradiated garlic blub.

Journal Articles

Relaxation behaviour and dose dependence of radiation induced radicals in irradiated mango

Kameya, Hiromi*; Kakita, Daisuke*; Kaimori, Yoshihiko*; Kikuchi, Masahiro; Kobayashi, Yasuhiko; Ukai, Mitsuko*; Shimoyama, Yuhei

Radioisotopes, 59(10), p.607 - 614, 2010/10

Mangoes are imported to Japan after treated with hot water. Recently, irradiated mangoes imported to U. S. are widely used. This paper reports on the ESR method for analyzing the radiation induced radicals of irradiated mangoes. Upon the $$gamma$$ ray irradiation, a strong signal peak in the flesh and skin of mangoes was observed at $$g$$ = 2.004. This singlet peak may be attributed to organic free radicals. The ESR spectra of the flesh and skin of mangoes showed the radiation induced radicals due to cellulose by irradiation over 12 kGy. The relaxation time (T1 and T2) of the singlet signal were calculated. T2 showed dose response according to increasing the irradiation dose levels, while T1 was almost constant. The value of (T1T2)1/2 showed the dependence of irradiation dose level.

Journal Articles

Sprouting and rooting inhibition of garlic with Co-60 $$gamma$$-rays

Kobayashi, Yasuhiko; Kikuchi, Masahiro; Todoriki, Setsuko*; Saito, Kimie*; Katsura, Yoko*; Kameya, Hiromi*; Ichikawa, Mariko*; Iizuka, Tomoko*; Chiba, Etsuko*; Ukai, Mitsuko*

Shokuhin Shosha, 45(1-2), p.26 - 33, 2010/09

Effect of $$gamma$$-irradiation on sprouting and rooting of garlic was investigated. Sprouting and rooting of garlic were inhibited by irradiation of bulbs at 2 months after harvest with doses more than 30 Gy. Four weeks-later irradiation requires higher doses to complete sprouting/rooting inhibition.

Journal Articles

Detection method for irradiated garlic using ESR

Ukai, Mitsuko*; Kameya, Hiromi*; Nakamura, Hideo*; Todoriki, Setsuko*; Kikuchi, Masahiro; Sakashita, Tetsuya; Funayama, Tomoo; Kobayashi, Yasuhiko

JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 85, 2009/12

By Electron Spin Resonance (ESR) spectroscopy, we revealed free radicals in irradiated garlic. The representative ESR spectrum of garlic is composed of a singlet at the ${it g}$-value of 2.0. The signal is due to organic free radicals. Upon $$gamma$$-irradiation, new signals appeared. To analyze the irradiation effects, we proposed an ESR detection method of irradiated garlic.

Oral presentation

Sprout inhibition of garlic with Co-60 $$gamma$$-rays

Kobayashi, Yasuhiko; Kikuchi, Masahiro; Todoriki, Setsuko*; Saito, Kimie*; Katsura, Yoko*; Kameya, Hiromi*; Ichikawa, Mariko*; Iizuka, Tomoko*; Chiba, Etsuko*; Ukai, Mitsuko*

no journal, , 

no abstracts in English

Oral presentation

Measurement of radical relaxations in irradiated foods

Kikuchi, Masahiro; Kameya, Hiromi*; Shimoyama, Yuhei; Todoriki, Setsuko*; Ukai, Mitsuko*; Kobayashi, Yasuhiko

no journal, , 

no abstracts in English

Oral presentation

Size effect of powdered black pepper on ESR detection method

Kaimori, Yoshihiko; Kikuchi, Masahiro; Kameya, Hiromi*; Kobayashi, Yasuhiko; Ukai, Mitsuko*

no journal, , 

no abstracts in English

Oral presentation

Detection of $$gamma$$-irradiated dried-fruits and shellfish by electron spin resonance

Takatsuki, Satoshi*; Tsutsumi, Tomoaki*; Matsuda, Rieko*; Okano, Masahito*; Kameya, Hiromi*; Todoriki, Setsuko*; Kikuchi, Masahiro; Goto, Hirofumi*; Sekiguchi, Masayuki*; Hara, Hideyuki*; et al.

no journal, , 

no abstracts in English

Oral presentation

The Relaxation behaviors of radicals induced in irradiated foods

Kawamura, Shoei*; Kishida, Keigo*; Kameya, Hiromi*; Kikuchi, Masahiro; Nakamura, Hideo*; Kobayashi, Yasuhiko; Ukai, Mitsuko*

no journal, , 

no abstracts in English

Oral presentation

Analysis of relaxation time of radicals induced in electron beam or $$gamma$$-ray irradiated foods

Kishida, Keigo*; Kawamura, Shoei*; Kameya, Hiromi*; Kikuchi, Masahiro; Nakamura, Hideo*; Kobayashi, Yasuhiko; Ukai, Mitsuko*

no journal, , 

no abstracts in English

Oral presentation

Analysis of relaxation times of radicals induced in irradiated soy beans

Kishida, Keigo*; Yamamoto, Kumiko*; Kikuchi, Masahiro; Kameya, Hiromi*; Shimoyama, Yuhei; Kobayashi, Yasuhiko; Todoriki, Setsuko*; Nakamura, Hideo*; Ukai, Mitsuko*

no journal, , 

no abstracts in English

22 (Records 1-20 displayed on this page)