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Journal Articles

Stoichiometry between humate unit molecules and metal ions in supramolecular assembly induced by Cu$$^{2+}$$ and Tb$$^{3+}$$ measured by gel electrophoresis techniques

Nakano, Sumika*; Marumo, Kazuki*; Kazami, Rintaro*; Saito, Takumi*; Haraga, Tomoko; Tasaki-Handa, Yuiko*; Saito, Shingo*

Environmental Science & Technology, 55(22), p.15172 - 15180, 2021/11

 Times Cited Count:5 Percentile:27.35(Engineering, Environmental)

Humic acid (HA) can strongly complex with metal ions to form a supramolecular assembly via coordination binding. However, determining the supramolecular size distribution and stoichiometry between small HA unit molecules constituting HA supramolecule and metal ions has proven to be challenging. Here, we investigated the changes in the size distributions of HAs induced by Cu$$^{2+}$$ and Tb$$^{3+}$$ ions using a unique polyacrylamide gel electrophoresis (PAGE) for the separation and quantification of HA complexes and metal ions bound, followed by UV-Vis spectroscopy and EEM-PARAFAC. It was found that the supramolecular behaviors of Cu$$^{2+}$$ and Tb$$^{3+}$$ complexes with HA collected from peat and deep groundwater (HHA) differed. Our results suggest that this supramolecular stoichiometry is related to the abundance of sulfur atoms in the elemental composition of HHA. Our results provide new insights into HA supramolecules formed via metal complexation.

Journal Articles

High energy ion irradiation effects on polymer materials; LET dependence of G value of scission of polymethylmethacrylate (PMMA)

Kudo, Hisaaki; Sasuga, Tsuneo; Seguchi, Tadao

JAERI-Conf 97-003, p.273 - 276, 1997/03

no abstracts in English

Journal Articles

Temperature effects on radiation induced phenomena in polytetrafluoroethylene (PTFE); Change of G-value

; Ikeda, Shigetoshi*; Kudo, Hisaaki; Seguchi, Tadao; Tabata, Yoneho*

Radiation Physics and Chemistry, 50(6), p.611 - 615, 1997/00

 Times Cited Count:61 Percentile:95.93(Chemistry, Physical)

no abstracts in English

Journal Articles

Application of high-performance gel permeation chromatography to aquatic humic substances in natural waters

Nagao, Seiya;

Humic Substances and Organic Matter in soil and Water Environments: Characterization,Transformations, 0, p.71 - 79, 1996/00

no abstracts in English

Journal Articles

Effect of molecular orientation on the radiolysis of polyethylene in the presence of oxygen

; Nishii, Masanobu; Seguchi, Tadao; ;

Radiation Physics and Chemistry, 37(2), p.213 - 216, 1991/00

no abstracts in English

Journal Articles

Effects of water vapor on the radiolysis of methane over molecular sieve 5A

;

Radiation Physics and Chemistry, 33(6), p.567 - 572, 1989/00

no abstracts in English

Journal Articles

Radiation effects on methane in the presence of molecular sieves

; ;

J.Chem.Soc.,Faraday Trans.,I, 79, p.1973 - 1986, 1983/00

no abstracts in English

Journal Articles

Emulsifier-free emulsion polymerization of tetrafluoroethylene by radiation, 4; Effects of additives on polymer molecular weight

; ; ; Machi, Sueo

J.Appl.Polym.Sci., 23(4), p.967 - 983, 1979/00

 Times Cited Count:4

no abstracts in English

Journal Articles

Effect of molecular weight on melting and crystallization behavior of polytertrafluoroethylene As-polymerized

; Takehisa, Masaaki; Machi, Sueo

Kobunshi Rombunshu, 36(6), p.393 - 399, 1979/00

 Times Cited Count:0

no abstracts in English

Journal Articles

Synthesis of polymers by radiation, 1

Machi, Sueo; Yoshida, Kenzo

Genshiryoku Kogyo, 24(10), p.72 - 77, 1978/00

no abstracts in English

Journal Articles

Synthesis of high molecular weight polyacrylamide flocculant by radiation polymerization

; ; Machi, Sueo

J.Appl.Polym.Sci., 20(12), p.3233 - 3240, 1976/12

 Times Cited Count:39

no abstracts in English

Journal Articles

Viscoelastic properties of low molecular weight sintered polytetrafluoroethylene

Sasuga, Tsuneo; Takehisa, Masaaki

J.Polym.Sci.,Polym.Phys.Ed., 12(12), p.2577 - 2578, 1974/12

no abstracts in English

Journal Articles

Effect of molecular weight on the melting and crystallization behaviors of as-polymerized polytetrafluoroethylene

; Seguchi, Tadao; Takehisa, Masaaki; Machi, Sueo

Reports on Progress in Polymer Physics in Japan, 17, p.213 - 216, 1974/00

no abstracts in English

Journal Articles

Journal Articles

Molecular weight distribution and molecular structure of polyethylene produced by radiation induced polymerization

Yamaguchi, Koichi; ; ; Takehisa, Masaaki

J.Polym.Sci.,Polym.Phys.Ed., 11(8), p.1573 - 1584, 1973/08

no abstracts in English

Journal Articles

Bimodal molecular weight distribution of poly(vinyl acetate) produced in n-hexane by radiation

; Machi, Sueo

Journal of Polymer Science; Polymer Letters Edition, 11(2), p.115 - 120, 1973/02

no abstracts in English

16 (Records 1-16 displayed on this page)
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