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Journal Articles

Enhancement in dose sensitivity of polymer gel dosimeters composed of radiation-crosslinked gel matrix and less toxic monomers

Hiroki, Akihiro; Yamashita, Shinichi*; Taguchi, Mitsumasa

Journal of Physics; Conference Series, 573(1), p.012028_1 - 012028_4, 2015/01

BB2014-0610.pdf:0.75MB

 Times Cited Count:4 Percentile:12.73

Polymer gel dosimeters based on radiation-crosslinked hydroxypropyl cellulose gel were prepared, which comprised 2-hydroxyethyl methacrylate (HEMA) and polyethylene glycol dimethacrylate (9G) as less toxic monomers and tetrakis (hydroxymethyl) phosphoniumu chloride (THPC) as an antioxidant. The dosimeters exposed to $$^{60}$$Co $$gamma$$-rays became cloudy at only 1 Gy. The irradiated dosimeters were optically analyzed by using a UV-vis spectrophotometer to evaluate dose response. Absorbance of the dosimeters linearly increased in the dose range from 0 to 10 Gy. The dose sensitivity increased with increasing 9G concentration. The dosimeter with 2 wt% HEMA, 3 wt% 9G, and 0.16 wt% THPC exhibited about 0.04 Abs Gy$$^{-1}$$ of the dose sensitivity. The dose sensitivity of the dosimeters was also enhanced by increment in THPC, reached about 0.06 Abs Gy$$^{-1}$$ at 0.40 wt% THPC.

Journal Articles

Improvement of heat stability of poly(lactic acid) by radiation crosslinking

Nagasawa, Naotsugu

Nippon Secchaku Gakkai-Shi, 41(10), p.420 - 426, 2005/10

no abstracts in English

Journal Articles

Application of poly(lactic acid) modified by radiation crosslinking

Nagasawa, Naotsugu; Kaneda, Ayako*; Kanazawa, Shinichi*; Yagi, Toshiaki; Mitomo, Hiroshi*; Yoshii, Fumio; Tamada, Masao

Nuclear Instruments and Methods in Physics Research B, 236(1-4), p.611 - 616, 2005/07

 Times Cited Count:67 Percentile:2.26(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Improvement of heat stability of poly($$_{L}$$-lactic acid) by radiation-induced crosslinking

Mitomo, Hiroshi*; Kaneda, Ayako*; Tran, M. Q.*; Nagasawa, Naotsugu; Yoshii, Fumio

Polymer, 46(13), p.4695 - 4703, 2005/06

 Times Cited Count:102 Percentile:5.48(Polymer Science)

no abstracts in English

Journal Articles

Modification of enviromentally-friendly polymer by radiation and its applications in agriculture and welfare fields

Yagi, Toshiaki

Dai-14-Kai Hoshasen Riyo Gijutsu Semina; Hirogaru Hoshasen No Sangyo Riyo Koen Tekisuto, p.67 - 72, 2004/10

no abstracts in English

Journal Articles

Application on environment and medical$$cdot$$welfare fields of materials modified by radiation

Yoshii, Fumio

Genshiryoku Shisutemu Nyusu, 15(2), p.31 - 37, 2004/09

no abstracts in English

Journal Articles

Application of functional polymer material modified by radiation processing technique

Yoshii, Fumio

Hoshasen Kagaku, (78), p.26 - 34, 2004/09

no abstracts in English

Journal Articles

Application of radiation-graft material for metal adsorbent and crosslinked natural polymer for healthcare product

Tamada, Masao; Seko, Noriaki; Yoshii, Fumio

Radiation Physics and Chemistry, 71(1-2), p.223 - 227, 2004/09

 Times Cited Count:60 Percentile:3.57(Chemistry, Physical)

Graft polymerization and crosslinking in radiation processing were attractive techniques to modify conventional polymers. In the case of graftpolymerization, metal adsorbent was prepared by introducing the chelate function to trunk polymer like polyethylene. The obtained metal adsorbent was applied to the recovery of uranium in seawater. Three years' marine experiment revealed that 1kg of uranium could be collected by using graft-adsorbent. Natural polymers such as derivatives of starch and cellulose led irradiation crosslinking at paste-like condition and formed hydrogels. These hydrogels had degradability even after crosslinking. The mat of degradable hydrogel was effective to prevent bedsores as a healthcare product. After use, the hydrogel can be converted to fertilizer by decompositions.

Journal Articles

Application of biodegradable polymers modified by radiation

Yoshii, Fumio

Bokin Bobai-Shi, 32(8), p.405 - 412, 2004/08

no abstracts in English

Journal Articles

Syntheses of hydroxypropyl methylcellulose phthalate gels in organic solvents by radiation crosslinking

Xu, L.*; Nagasawa, Naotsugu; Yoshii, Fumio; Kume, Tamikazu

Journal of Applied Polymer Science, 92(5), p.3002 - 3007, 2004/06

 Times Cited Count:3 Percentile:86.01(Polymer Science)

no abstracts in English

Journal Articles

Synthesis of poly(butylene succinate)/glass fiber composite by irradiation and its biodegradability

The, D. T.; Yoshii, Fumio; Nagasawa, Naotsugu; Kume, Tamikazu

Journal of Applied Polymer Science, 91(4), p.2122 - 2127, 2004/02

 Times Cited Count:12 Percentile:58.23(Polymer Science)

no abstracts in English

Journal Articles

Preparation of crosslinked carboxymethylated chitin derivatives by irradiation and their sorption behavior for copper(II) ions

Zhao, L.; Mitomo, Hiroshi*; Yoshii, Fumio; Kume, Tamikazu

Journal of Applied Polymer Science, 91(1), p.556 - 562, 2004/01

no abstracts in English

Journal Articles

Preparation of crosslinked carboxymethylated chitin derivatives by irradiation and their sorption behavior for Copper(II) ions

Zhao, L.; Mitomo, Hiroshi*; Yoshii, Fumio; Kume, Tamikazu

Journal of Applied Polymer Science, 91(1), p.556 - 562, 2004/01

 Times Cited Count:20 Percentile:42.22(Polymer Science)

no abstracts in English

Journal Articles

Application of radiation synthesis hydrogel

Yoshii, Fumio

Kobunshi Geru No Saishin Doko, p.150 - 163, 2004/00

no abstracts in English

Journal Articles

Synthesis of antibacterial PVA/CM-chitosan blend hydrogels with electron beam irradiation

Zhao, L.; Mitomo, Hiroshi*; Zhai, M.*; Yoshii, Fumio; Nagasawa, Naotsugu; Kume, Tamikazu

Carbohydrate Polymers, 53(4), p.439 - 446, 2003/09

 Times Cited Count:146 Percentile:1.73

no abstracts in English

Journal Articles

Syntheses of hydroxypropyl methylcellulose phthalate hydrogels in Na$$_{2}$$CO$$_{3}$$ aqueous solutions with electron-beam irradiation

Xu, L.*; Nagasawa, Naotsugu; Yoshii, Fumio; Kume, Tamikazu

Journal of Applied Polymer Science, 89(8), p.2123 - 2130, 2003/08

 Times Cited Count:6 Percentile:72.35(Polymer Science)

no abstracts in English

Journal Articles

Radiation synthesis and characteristic of the hydrogels based on carboxymethylated chitin derivatives

Zhao, L.; Mitomo, Hiroshi*; Nagasawa, Naotsugu; Yoshii, Fumio; Kume, Tamikazu

Carbohydrate Polymers, 51(2), p.169 - 175, 2003/01

 Times Cited Count:97 Percentile:4.31

no abstracts in English

Journal Articles

Radiation crosslinking of poly(butylene succinate) in the presence of low concentration of trimethallyl isocyanurate and its properties

Suhartini, M.; Mitomo, Hiroshi*; Nagasawa, Naotsugu; Yoshii, Fumio; Kume, Tamikazu

Journal of Applied Polymer Science, 88(9), p.2238 - 2246, 2003/00

 Times Cited Count:37 Percentile:23.21(Polymer Science)

no abstracts in English

Journal Articles

Syntheses of PVA/starch grafted hydrogels by irradiation

Zhai, M.*; Yoshii, Fumio; Kume, Tamikazu; Hashim, K.*

Carbohydrate Polymers, 50(3), p.295 - 303, 2002/11

 Times Cited Count:137 Percentile:1.86

no abstracts in English

Journal Articles

Hydrogel of radiation-induced cross-linked hydroxypropylcellulose

Wach, R. A.*; Mitomo, Hiroshi*; Yoshii, Fumio; Kume, Tamikazu

Macromolecular Materials and Engineering, 287(4), p.285 - 295, 2002/04

 Times Cited Count:42 Percentile:19.44

no abstracts in English

91 (Records 1-20 displayed on this page)