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Journal Articles

Differences in water dynamics between the hydrated chitin and hydrated chitosan determined by quasi-elastic neutron scattering

Hirota, Yuki*; Tominaga, Taiki*; Kawabata, Takashi*; Kawakita, Yukinobu; Matsuo, Yasumitsu*

Bioengineering (Internet), 10(5), p.622_1 - 622_17, 2023/05

 Times Cited Count:0 Percentile:0.01(Biotechnology & Applied Microbiology)

Journal Articles

Current status of adsorbent for metal ions with radiation grafting and crosslinking techniques

Seko, Noriaki; Tamada, Masao; Yoshii, Fumio

Nuclear Instruments and Methods in Physics Research B, 236(1-4), p.21 - 29, 2005/07

 Times Cited Count:104 Percentile:98.74(Instruments & Instrumentation)

Removal of toxic metals from streaming water and ground water is important task to preserve environment. Radiation processings of grafting and crosslinking can synthesis adsorbent having high performances. Graft adsorbent can be synthesized by using the conventional polymer like polyethylene having variety shapes such as membrane, cloth, and fiber. Especially, the obtained fibrous adsorbent has 100 times higher rate of adsorption than that of commercialized resin. Novel fibrous adsorption for arsenic was synthesized by direct grafting of phosphoric monomer and following zirconium-loading. Fibrous adsorbents of amidoxime and iminodiacetate were applied to the removal of cadmium from the scallop waste. Furthermore, the amidoxime adsorbent is useful to recover rare metal such as uranium and vanadium in seawater. Crosslinked natural polymers like chitin-chitosan in the paste-like state are applicable for the metal adsorbent. This adsorbent can be biodegraded after usage.

Journal Articles

Adsorption of metal ions by carboxymethylchitin and carboxymethylchitosan hydrogels

Wasikiewicz, J. M.; Nagasawa, Naotsugu; Tamada, Masao; Mitomo, Hiroshi*; Yoshii, Fumio

Nuclear Instruments and Methods in Physics Research B, 236(1-4), p.617 - 623, 2005/07

 Times Cited Count:54 Percentile:94.94(Instruments & Instrumentation)

The absorption ability of various metal ions into EB - radiation crosslinked carboxymethylchitin and carboxymethylchitosan has been investigated. The highest adsorption of Scandium and Gold has been obtained for carboxymethylchitin (CMCht) and carboxymethylchitosan (CMChts), respectively. Kinetic studies showed that adsorption of most of the metal ions occur in a relatively short period of time (2 hours). Detail investigation of adsorption of gold ions has been carried out for both hydrogels. The maximum uptake of Au cations, based on Langmuir equation was determined to be 37.59 mg/g for CMChts and 11.86 mg/g for CMCht. Both hydrogels indicate favorable adsorption of gold cations.

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

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:54.02(Polymer Science)

no abstracts in English

Journal Articles

Characterization of Eu(III) adsorbed onto chitin and chitosan by time-resolved laser-induced fluorescence spectroscopy

Ozaki, Takuo; Kimura, Takaumi; Yoshida, Zenko; Francis, A. J.*

Chemistry Letters, 32(7), p.560 - 561, 2003/07

 Times Cited Count:5 Percentile:26.45(Chemistry, Multidisciplinary)

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:115 Percentile:96.4(Chemistry, Applied)

no abstracts in English

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