研究领域

Inorganic Chemistry, Analytical Chemistry

Study on Silsesquioxanes keyword : silsesquioxane, hydorogenatom, cage structure, encapsulation, ESR 1987.04. Study on Chemistry of Rare Earth Elements keyword : rare earth element, heteropoly anion, redox behavior, stabilization, crown ether 1983.04. Study on Concentration of Trace Elements keyword : gold, adsorption, reduction, metal oxide, manganese nodule 2000.10. Study on Dissolution of Copper Buildings by Acid Rain keyword : acid rain, copper building, dissolution mechanism, XPS, XAFS 2000.04.

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Experimental Study on the Effect of Polyacrylic Acid on the Growth of Silica Scale. Mayumi Etou, Tsutomu Kurisaki, Yoshihiro Okaue, Hisanobu Wakita, Takushi Yokoyama,13C and 27Al NMR Study of Complexation between Aluminium Ion and Simple Dicarboxylic Acids under an Acidic Condition: New Peak Assignments of 27Al NMR Spectra of Mixed Solutions of Al3+ and Simple Dicarboxylic Acids,Anal. Sci. ,Vol.29,No.8,2013.08. Gaowa Naren, Hironori OHASHI, Yoshihiro Okaue, Takushi Yokoyama,Adsorption kinetics of silicic acid on akaganeite,Journal of Colloid and Interface Science,Vol.399,pp.87-91,2013.06. Emi Otsu, Mayumi Etou, Hironori OHASHI, Ikuko Nishida, Shuquin Bai, Yoshihiro Okaue, Takushi Yokoyama,Quantification Method of Size Distribution of Polysilicic Acid in Supersaturated Silicic Acid Solution,Anal. Sci. ,Vol.29,No.3,2013.03. Gaowa Naren, Akane Miyazaki, Motoyuki Matsuo, Bai Shuqin, KOTARO YONEZU, Yoshihiro Okaue, Takushi Yokoyama,A study on the interaction between ferric ion and silicic acid in hydrosphere: Si-containing ferruginous deposits formed in neutral hot spring waters ,Chin. J. Geochem.,Vol.32,No.1,2013.03. Mayumi Etou, Satoru Hagiwara, Tomoyuki Saito, Hiroaki Noma, Yoshihiro Okaue, Takushi Yokoyama,Chemical Properties of Aluminum Tridecamer Transferred onto Chelating Resin,Soil Sci. Soc. Am. J.,Vol.76,2012.11. Shuqin Bai, Gaowa Naren, Hiroaki Noma, Mayumi Etou, Hironori OHASHI, FUJINO Yasuhiro, Katsumi DOI, Yoshihiro Okaue, Takushi Yokoyama,Silica deposition induced by isolated aluminum ions bound on chelate resin as a model compound of the surface of microbes ,Colloids and Surfaces B,Vol.95,pp.208-213,2012.06. State Analysis of Au Nanoparticles Supported on NiO. Characterization of Gold Nanoparticles Supported on Metal Oxides by X-Ray Absorption Spectroscopy and 197Au Mössbauer Spectroscopy: Detection of Gold Alloy. A New Insight of Gel Chromatography for Silicic Acid: A combination with Dynamic Light Scattering. Pornthip Parinayok, Mamiko Yamashita, Kotaro Yonezu, Hironori Ohashi, Koichiro Watanabe, Yoshihiro Okaue, Takushi Yokoyama,Interaction of Au(III) and Pt(IV) complex ions with Fe(II) ions as a scavenging and a reducing agent: A basic study on the recovery of Au and Pt by a chemical method,Journal of Colloid and Interface Science,Vol.364,No.1,pp.272-275,364(1), 272-275,2011.12. Ikuko Nishida, Yoshihiro Okaue, Takushi Yokoyama,The inhibition abilities of multifunctional polyelectrolytes for silica scale formation in cooling water systems: Role of the nonionic functional group,Journal of Colloid and Interface Science,Vol.360,No.1,pp.110-116,360(1), 110-116,2011.08. The Effect of Organic Compounds on Si Concentration in Soil Solution　　　　- the Comparision of Poly(N-vinylpyrrolidone) and N-methyl-2-pyrrolidone ̶. Shuqin Bai, Yutaka Tsuji, Yoshihiro Okaue, Takushi Yokoyama,Complexation of Silicic Acid with Tiron in Aqueous Solution under Near Natural Condition,Journal of Solution Chemistry,Vol.40,No.2,pp.348-356,2011.02. Mayumi Etou, Yuka Masaki, Yutaka Tsuji, Tomoyuki Saito, Shuqin Bai, Ikuko Nishida, Yoshihiro Okaue, Takushi Yokoyama,Interaction between Al3+ and Acrylic Acid and Polyacrylic Acid in Acidic Aqueous Solution: A Model Experiment for the Behavior of Al3+ in Acidified Soil Solution,Analytical Sciences,Vol.27,No.1,pp.111-115,2011.01. Gaowa Naren, Ikuko Nishida, Yuuki Shimada, Yutaka Tsuji, Shuqin Bai, Yoshihiro Okaue, Takushi Yokoyama,Formation of a silicato complex of zinc in aqueous solution and its accelerating effect on the formation of silica scales in cooling water systems,Journal of Colloid and Interface Science,Vol.353,No.1,pp.331-334,2011.01. Ikuko Nishida, Yoshihiro Okaue, Takushi Yokoyama,Effects of Adsorption Conformation on the Dispersion of Aluminum Hydroxide Particles by Multifunctional Polyelectrolytes,Langmuir,Vol.26,No.14,pp.11663-11669,2010.07. Rare Earth Elements in the Silica Scales from Geothermal Water. Shuqin Bai, Yoshihiro Okaue, Takushi Yokoyama,Depolymerization of polysilicic acid by tiron,Polymer Degradation and Stability,Vol.94,No.10,pp.1795-1799,2009.10. Akira Etou, Shuqin Bai, Tomoyuki Saito, Hiroaki Noma, Yoshihiro Okaue, Takushi Yokoyama,Formation conditions and stability of a toxic tridecameric Al polymer under a soil environment,Journal of Colloid and Interface Science,Vol.337,No.2,pp.606-609,2009.09.