Tokushima University / Educator and Researcher Directory --- Yamamoto, Yuhei

Personal Web Page

https://researchmap.jp/y.yamamoto000 (researchmap)

Field of Study

○	無機分析化学

Subject of Study

○	環境中の重金属元素に関する化学

Book / Paper

Academic Paper (Judged Full Paper):

1.	Yuhei Yamamoto, Kentaroh Oka, Tokoro Shunichi, Naomichi Nishii, Kikuchi Yoichi, Jun Nishimoto and Shoji Imai : Investigation of the concentration ratios of anthropogenic metal elements in fresh snow at mountain area as a tracer for the discrimination between short and longrange transport contributions, Analytical Sciences, Vol.39, No.1, 679-687, 2023. (Keyword) Anthropogenic aerosol / Trace metal elements / Snow · / Long-range transportation / Remote mountains (Link to Publication Site) ● Publication site (DOI): 10.1007/s44211-022-00261-w (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/s44211-022-00261-w (DOI: 10.1007/s44211-022-00261-w)
2.	Ken-Ichi Fushimi, D. Chernyak, Hiroyasu Ejiri, K. Hata, Ryuta Hazama, T. Iida, H. Ikeda, K. Imagawa, K. Inoue, H. Ishiura, H. Ito, T. Kishimoto, M. Koga, Kenta Kotera, A. Kozlov, K. Nakamura, Reiko Orito, Tatsushi Shima, Y. Takemoto, S. Umehara, Yusuke Urano, Yuhei Yamamoto, K. Yasuda and S. Yoshida : PICOLON dark matter search project, Journal of Physics: Conference Series, Vol.2156, 012045, 2022. (Keyword) cosmic dark matter / crystal growth / 高純度 (Tokushima University Institutional Repository) ● Metadata: 117565 (Link to Publication Site) ● Publication site (DOI): 10.1088/1742-6596/2156/1/012045 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1088/1742-6596/2156/1/012045 (Tokushima University Institutional Repository: 117565, DOI: 10.1088/1742-6596/2156/1/012045)
3.	Shotaro Takano, Mao Tsuchiya, Shoji Imai, Yuhei Yamamoto, Yusuke Fukami, Katsuhiko Suzuki and Yoshiki Sohrin : Isotopic analysis of nickel, copper, and zinc in various freshwater samples for source identification, Geochemical Journal, Vol.55, No.3, 171-183, 2021. (Summary) Nickel (Ni), copper (Cu), and zinc (Zn) are commonly used in human activities and pollute aquatic environments including rivers and oceans. Recently, Ni, Cu, and Zn isotope ratios have been measured to identify their sources and cycles in environments. We precisely determined the Ni, Cu, and Zn isotope ratios in rain, snow, and rime collected from Uji City and Mt. Kajigamori in Japan, and investigated the potential of isotopic ratios as tracers of anthropogenic materials. The isotope and elemental ratios suggested that road dust is the main source of Cu in most rain, snow, and rime samples and that some of the Cu may originate from fossil fuel combustion. Zinc in the rain, snow, and rime samples may be partially attributed to Zn in road dust. Zinc isotope ratios in the Uji rain samples are lower than those in the road dust, which would be emitted via high temperature processes. Nickel isotope ratios are correlated with V/Ni ratios in the rain, snow, and rime samples, suggesting that their main source is heavy oil combustion. Furthermore, we analyzed water samples from the Uji and Tawara Rivers and the Kakita River spring in Japan. Nickel and Cu isotope ratios in the river water samples were significantly heavier than those in rain, snow, and rime samples, while Zn isotope ratios were similar. This is attributed to isotopic fractionation of Cu and Ni between particulate-dissolved phases in river water or soil. (Keyword) isotope / environmental science / ICP-MS (Tokushima University Institutional Repository) ● Metadata: 116028 (Link to Publication Site) ● Publication site (DOI): 10.2343/geochemj.2.0627 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1050851707403501440 ● Search Scopus @ Elsevier (DOI): 10.2343/geochemj.2.0627 (Tokushima University Institutional Repository: 116028, DOI: 10.2343/geochemj.2.0627, CiNii: 1050851707403501440)
4.	Yuhei Yamamoto, SANAGAWA Yosuke and Shoji Imai : Determination of Trace Elements in Aerosols at a Rural Mountainous Area and a Local City of Eastern Shikoku Region, Japan, Analytical Sciences, Vol.36, No.5, 637-643, 2020. (Keyword) ICP-MS / aerosol / lead / PM2.5 / air pollution (Tokushima University Institutional Repository) ● Metadata: 115317 (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.20SBN06 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.20SBN06 (Tokushima University Institutional Repository: 115317, DOI: 10.2116/analsci.20SBN06)
5.	Yuhei Yamamoto, Yosuke Sanagawa, Yuhya Kurumi, Ayumi Saito, Jun Nishimoto, Yoichi Kikuchi and Shoji Imai : Natural Levels of Concentration of Cadmium, Lead and Non seasalt-Sulfate in Clean Rain and Fresh Snow collected in Remote and Rural Areas in Japan, Bunseki Kagaku, Vol.68, No.1, 51-64, 2019. (Keyword) snow / Lead / heavy metals / environmental analytical chemistry / Environmental geochemistry (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.68.51 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.2116/bunsekikagaku.68.51 (DOI: 10.2116/bunsekikagaku.68.51)
6.	Yuhei Yamamoto, Kanekiyo Eri, Shimizu Kaito, Takahashi Genki, Hashimoto Genki and Shoji Imai : Composition and Origin of Cadmium and Lead in Snow Collected from Remote Mountain Area in Japan in a 2015 to 2018, Bunseki Kagaku, Vol.67, No.21, 733-741, 2018. (Keyword) Pb/Cd ratio / snow / remote mountain area / aerosol / long distance transport (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.67.733 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.2116/bunsekikagaku.67.733 (DOI: 10.2116/bunsekikagaku.67.733)
7.	Hitoshi Mizuguchi, Ryota Ishida, Yasushi Kouno, Tadahiko Tachibana, Tomomi Honda, Tatsuro Kijima, Yuhei Yamamoto and Toshio Takayanagi : A Rapid Enrichment Technique for the Ultratrace Determination of Nickel in Water Samples Using a Nanofiber-composite Membrane Filter, Analytical Sciences, Vol.34, No.8, 907-912, 2018. (Summary) A new method for the rapid enrichment and highly sensitive determination of nickel ion has been developed by using a nanofiber-composite membrane filter, which was fabricated by stacking a nanofibrous material made of nylon 6 over a water-permeable membrane filter. The noncharged nickel-α-furil dioxime complex was adsorbed on a nanofibrous layer of the membrane filter under significantly higher flow rates than those used for conventional solid-phase extraction techniques. Highly sensitive determinations with detection limits at sub-parts per billion levels were achieved by enrichment from 50 mL of the complex solution, and the enrichment was completed within 3 min. The color that was developed on the membrane filter was successfully subjected to visual colorimetric analysis and quantitative determination by solid-phase spectrophotometry. In addition, colorimetric determination was feasible with a handheld spectrometer after elution of the colored agent with 50 μL of acetone. This combination of rapid enrichment and spectrometric measurement in a small-volume sample provides a useful analytical method suitable for on-site analysis, which requires neither expensive instruments nor high laboratory skills. (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.18P093 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 30101885 ● Search Scopus @ Elsevier (PMID): 30101885 ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.18P093 (DOI: 10.2116/analsci.18P093, PubMed: 30101885)
8.	Yuhei Yamamoto, Yohsuke Sanagawa, Eri Kanekiyo, Kaito Shimizu, Takashi Yamamoto and Shoji Imai : 実験室型X線吸収分光装置を用いた遠隔山岳地域で採取された湿性沈着中の長距離輸送エアロゾル中に含まれる鉄の化学状態分析, Bunseki Kagaku, Vol.67, No.6, 349-354, 2018. (Keyword) Aerosol / Chemical State Analysis / Environmental Iron / environmental protection (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.67.349 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85049736896 (DOI: 10.2116/bunsekikagaku.67.349, Elsevier: Scopus)
9.	Shoji Imai, Yuhei Yamamoto, Takashi Yamamoto, Kenji KODAMA, Jun Nishimoto and Yoichi KIKUCHI : Sulfur Chemical State and Chemical Composition of Insoluble Substance in Soft Rime, Hard Rime and Snow collected on Remote and Rural Areas in Japan using WDXRF, Analytical Sciences, Vol.34, No.5, 589-598, 2018. (Keyword) WD-XRF / Sulfur / Speciation / PM2.5 / air pollution (Tokushima University Institutional Repository) ● Metadata: 111675 (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.17P277 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 29743432 ● Summary page in Scopus @ Elsevier: 2-s2.0-85046836493 (Tokushima University Institutional Repository: 111675, DOI: 10.2116/analsci.17P277, PubMed: 29743432, Elsevier: Scopus)
10.	Yuhei Yamamoto, Azusa Tagami, Toshihiro Shiarasaki, Akira Yonetani, Takashi Yamamoto and Shoji Imai : Role of iron modifier on boron atomization process using graphite furnace-atomic absorption spectrometry based on speciation of iron using X-ray absorption fine structure, Spectrochimica Acta. Part B: Atomic Spectroscopy, Vol.142, 55-61, 2018. (Keyword) boron / XAFS / Atomic absorption spectrometry / graphite furnace (Link to Publication Site) ● Publication site (DOI): 10.1016/j.sab.2018.01.016 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85041929483 (DOI: 10.1016/j.sab.2018.01.016, Elsevier: Scopus)
11.	Shoji Imai, Yuhei Yamamoto, Shimizu Kaito, Kanekiyo Rie, Jun Nishimoto and Kikuchi Yoichi : Pb / Cd Ratios in Fresh Snow Derived from Cold Air Mass from Northern North Eastern China and Maritime Province in Russia at Remote Area along Japan Sea in Honshu Island and Long-range Transport Mechanism during Winter, Bunseki Kagaku, Vol.67, No.2, 95-101, 2018. (Keyword) snow / determination of Pb, Cd / heavy metals / environmental analysis / environmental analytical chemistry (Tokushima University Institutional Repository) ● Metadata: 111213 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.67.95 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85042739003 (Tokushima University Institutional Repository: 111213, DOI: 10.2116/bunsekikagaku.67.95, Elsevier: Scopus)
12.	Yuhei Yamamoto, Azusa Tagami, Toshihiro Shirasaki, Akira Yonetani, Takashi Yamamoto and Shoji Imai : Atomization Mechanism of Boron by Graphite Furnace Atomic Absorption Spectrometry using Iron Matrix Modifier, Bunseki Kagaku, Vol.66, No.9, 629-637, 2017. (Keyword) 微量元素分析 / boron / heavy metals / 固相反応速度論 / environmental analysis (Tokushima University Institutional Repository) ● Metadata: 111211 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.66.629 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85031103909 (Tokushima University Institutional Repository: 111211, DOI: 10.2116/bunsekikagaku.66.629, Elsevier: Scopus)
13.	Shoji Imai, Yuhei Yamamoto, Yusuke SANAGAWA, Yuhya KURUMI, Isao KUROTANI, Jun Nishimoto and Yoichi KIKUCHI : Long-range Transport Mechanism in 2014 ~ 2008 Winter Season of Cadmium, Lead and nonseasalt-Sulfate ion in Fresh Rime and Fresh Snow Collected on the summit of Mt. Kajigamori, Shikoku Island, Japan, Bunseki Kagaku, Vol.66, No.2, 95-113, 2017. (Keyword) air pollutant / environmental chemistry / heavy metals / Coal burning emissions / PM2.5 (Tokushima University Institutional Repository) ● Metadata: 111209 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.66.95 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85016080760 (Tokushima University Institutional Repository: 111209, DOI: 10.2116/bunsekikagaku.66.95, Elsevier: Scopus)
14.	Yuhei Yamamoto, Kita Ikuya, Isono Narumi and Shoji Imai : Impact of competitive Fe(III) ion on complexation of humic acid and metal ions, Bunseki Kagaku, Vol.66, No.12, 875-883, 2017. (Tokushima University Institutional Repository) ● Metadata: 111212 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.66.875 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85040717184 (Tokushima University Institutional Repository: 111212, DOI: 10.2116/bunsekikagaku.66.875, Elsevier: Scopus)
15.	Shoji Imai, Yuhei Yamamoto and Takeshi Kamimura : Classification and Long-range Transfport of Inorganic Small Spherical Particles in Snow collected on Mountain and Remote Aera along Japan Sea in Honshu Island, Japan, Bunseki Kagaku, Vol.65, No.4, 211-219, 2016. (Summary) In order to investigate the long-range transfer mechanism of inorganic small spherical particles in wet-depositions on mountains and remote areas along the Japan Sea in Honshu Island, Japan in 2014 and 2015, other than the summit of Mt. Kajigamori in Shikoku Island, Japan, the residue was obtained with a 0.45 μm pore-sized filter and a single-particle analysis was carried out for ones below 3 μm by using a Low-Vacuum Tabletop SEM-EDX. Particles were classified in six categories according to their compositions. In this work, it was found that a new category type of distribution patterns of the particles (Al-Si particle) was presented, and proposed that depended on the 24 h back-trajectory in Russia near the coast area of Japan Sea. Relationship between classification and back trajectory of air mass was investigated and discussed. (Keyword) air pollutant / environmental chemistry (Tokushima University Institutional Repository) ● Metadata: 111206 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.65.211 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679637651200 ● Summary page in Scopus @ Elsevier: 2-s2.0-84966550747 (Tokushima University Institutional Repository: 111206, DOI: 10.2116/bunsekikagaku.65.211, CiNii: 1390282679637651200, Elsevier: Scopus)
16.	Yuhei Yamamoto, Toshihiro Shirasaki, Akira Yonetani and Shoji Imai : Study of the Roles of Chemical Modifiers in Determining Boron Using Graphite Furnace Atomic Absorption Spectrometry and Optimization of the Temperature Profile During Atomization, Analytical Sciences, Vol.31, No.5, 357-364, 2015. (Summary) The measurement conditions for determining boron using graphite furnace-atomic absorption spectrometry (GF-AAS) were investigated. Differences in the boron absorbance profiles were found using three different commercially available GF-AAS instruments when the graphite atomizers in them were not tuned. The boron absorbances found with and without adjusting the graphite atomizers suggested that achieving an adequate absorbance for the determination of boron requires a sharp temperature profile that overshoots the target temperature during the atomization process. Chemical modifiers that could improve the boron absorbance without the need for using coating agents were tested. Calcium carbonate improved the boron absorbance but did not suppress variability in the peak height. Improvement of boron absorbance was comparatively less using iron nitrate or copper nitrate than using calcium carbonate, but variability in the peak height was clearly suppressed using iron nitrate or copper nitrate. The limit of detection was 0.0026 mg L(-1) when iron nitrate was used. It appears that iron nitrate is a useful new chemical modifier for the quick and simple determination of boron using GF-AAS. (Keyword) boron / GF-AAS / chemical modifier (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.31.357 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 25958863 ● Summary page in Scopus @ Elsevier: 2-s2.0-84930352509 (DOI: 10.2116/analsci.31.357, PubMed: 25958863, Elsevier: Scopus)
17.	KURUMI Yuhya, SANAGAWA Yosuke, Yuhei Yamamoto, KAMIMURA Takeshi and Shoji Imai : Classification of Inorganic Small Spherical Particles in Rime and Snow at the Summit of Mt. Kajigamori, Shikoku Island, Japan, Bunseki Kagaku, Vol.63, No.10, 837-845, 2014. (Summary) In order to investigate the long-range transfer mechanism of inorganic small spherical particles in wet-depositions, such as rime, snow and glaze, on the summit of Mt. Kajigamori (1399.4 m alt.), Kochi, Shikoku Island, in 2011-2013, the residue was obtained with a 0.45 m pore-sized filter and then, a single-particle analysis was carried out for ones below 3 m by using a Low-Vacuum Tabletop scanning electron microscope-energy dispersion X-ray spectroscopy (SEM-EDX). Particles were classified in the six categories according to their compositions. In this work, it was found that two majour types of distribution patterns of the particles were presented. It was proposed that these depended on the 24 hrs back-trajectory, such as a typical fly-ash category in Huabei type and a Fe-Si-Al particle category in Dongbei type in China. The Zn-included particles were also analyzed. (Keyword) Environmental Chemistry / PM2.5 / environmental analytical chemistry / fly ash (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.63.837 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679637708672 ● Summary page in Scopus @ Elsevier: 2-s2.0-84908543903 (DOI: 10.2116/bunsekikagaku.63.837, CiNii: 1390282679637708672, Elsevier: Scopus)
18.	Daisuke Aosai, Yuhei Yamamoto, Takashi Mizuno, Toru Ishigami and Hiedeo Matsuyama : Size and composition analyses of colloids in deep granitic groundwater using microfiltration/ultrafiltration while maintaining in situ hydrochemical conditions, Colloids and Surfaces A:Physicochemical and Engineering Aspects, Vol.461, 279-286, 2014. (Link to Publication Site) ● Publication site (DOI): 10.1016/j.colsurfa.2014.08.007 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.colsurfa.2014.08.007 (DOI: 10.1016/j.colsurfa.2014.08.007)
19.	Sanagawa Yosuke, Kurumi Yuhya, Yuhei Yamamoto, Kamimura Takeshi and Shoji Imai : Concentrations of Chemical Constituents in Glaze at the Summit of Mt. Kajigamori in Kochi Prefecture, Shikoku Region, Japan, Bunseki Kagaku, Vol.63, No.4, 351-356, 2014. (Summary) The second and third glaze events in Shikoku region were observed to have arisen during the early morning in March 9/2012 and January 14/2013, respectively. In order to obtain information about the concentrations of chemical constituents in glaze, one of the samples was collected from the summit of Mt. Kajigamori (ALT. 1400 m), where is the watershed protection forest of Riv. Yoshinogawa is located. The concentrations of major soluble ions and toxic elements, such as Cd and Pb, were analyzed. High concentrations of nss-SO42- and Pb were observed with the back-trajectory over Middle and North China. The residues in the glaze were analyzed by a SEM-EDX technique. In the residue, various components of small spherical particulate were also found, indicating the presence of various origins of the fly-ash, including coal burning with the effect of long-range transport. (Keyword) Environmental Chemistry / atmosperic particles (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.63.351 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204660417152 ● Summary page in Scopus @ Elsevier: 2-s2.0-84940320087 (DOI: 10.2116/bunsekikagaku.63.351, CiNii: 1390001204660417152, Elsevier: Scopus)
20.	Fukushi Keisuke, Hasegawa Yusuke, Maeda Koushi, Aoi Yusuke, Arai Shoji, Yuhei Yamamoto, Aosai Daisuke and Mizuno Takashi : Sorption of Eu(III) on Granite: EPMA, LA-IPC-MS, Batch and Modeling Studies, Environmental Science and Technology, Vol.47, No.22, 12811-12818, 2013. (Summary) Eu(III) sorption on granite was assessed using combined microscopic and macroscopic approaches in neutral to acidic conditions where the mobility of Eu(III) is generally considered to be high. Polished thin sections of the granite were reacted with solutions containing 10 μM of Eu(III) and were analyzed using EPMA and LA-ICP-MS. On most of the biotite grains, Eu enrichment up to 6 wt % was observed. The Eu-enriched parts of biotite commonly lose K, which is the interlayer cation of biotite, indicating that the sorption mode of Eu(III) by the biotite is cation exchange in the interlayer. The distributions of Eu appeared along the original cracks of the biotite. Those occurrences indicate that the prior water-rock interaction along the cracks engendered modification of biotite to possess affinity to the Eu(III). Batch Eu(III) sorption experiments on granite and biotite powders were conducted as functions of pH, Eu(III) loading, and ionic strength. The macroscopic sorption behavior of biotite was consistent with that of granite. At pH > 4, there was little pH dependence but strong ionic strength dependence of Eu(III) sorption. At pH < 4, the sorption of Eu(III) abruptly decreased with decreased pH. The sorption behavior at pH > 4 was reproducible reasonably by the modeling considering single-site cation exchange reactions. The decrease of Eu(III) sorption at pH < 4 was explained by the occupation of exchangeable sites by dissolved cationic species such as Al and Fe from granite and biotite in low-pH conditions. Granites are complex mineral assemblages. However, the combined microscopic and macroscopic approaches revealed that elementary reactions by a single mineral phase can be representative of the bulk sorption reaction in complex mineral assemblages. (Link to Publication Site) ● Publication site (DOI): 10.1021/es402676n (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 24171426 ● Summary page in Scopus @ Elsevier: 2-s2.0-84888241168 (DOI: 10.1021/es402676n, PubMed: 24171426, Elsevier: Scopus)
21.	水野崇, 青才大介, 新宮信也, 萩原大樹, Yuhei Yamamoto and 福田朱里 : Hydrochemical Changes Associated with Construction of Mizunami Underground Research Laboratory, Transactions of the Atomic Energy Society of Japan, Vol.12, No.1, 89-102, 2013. (Summary) Japan Atomic Energy Agency has undertaken the Mizunami Underground Research Laboratory (MIU) Project at Gifu Pref., central Japan. The aims of the project are to establish methodologies for investigation, analysis, and assessment of the deep geological environment, and to develop engineering techniques for deep-underground applications. The MIU consists of two vertical shafts and a number of horizontal tunnels connecting the two shafts. In this study, hydrochemical properties were monitored continuously to evaluate the hydrochemical changes during the MIU construction. The study demonstrated that groundwater salinity changed in relation to the variation of groundwater-flow conditions as a result of the shaft construction. In particular, "up-coning" of the salinity profile was observed at the bottom of the shafts owing to the upward movement of deeper groundwater. The intensity of up-coning was irregular, and depended on the hydrogeological heterogeneity of the groundwater system. Although pH rose to around 12 due to interaction with the concrete lining the shafts and with the grout injected into the adjacent host rock, it decreased to below 10 in less than 2 years. The redox condition remained reducing, which is considered to be controlled by Fe2+/Fe(OH)3(am) and/or SO4 2-/FeS2 couples. These findings can be summarized in a conceptual model. (Keyword) 原子力 / environmental chemistry / 地球化学 (Link to Publication Site) ● Publication site (DOI): 10.3327/taesj.J12.008 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205185496192 ● Summary page in Scopus @ Elsevier: 2-s2.0-84877721098 (DOI: 10.3327/taesj.J12.008, CiNii: 1390001205185496192, Elsevier: Scopus)
22.	Ryoichi Nakada, Yoshio Takahashi, Guodong Zheng, Yuhei Yamamoto and Hiroshi Shimizu : Abundances of rare earth elements in crude oils and their partitions in water, Geochemical Journal, Vol.44, No.5, 411-418, 2010. (Keyword) rare earth elements / crude oil / partition coefficient / NMR / Junggar Basin (Link to Publication Site) ● Publication site (DOI): 10.2343/geochemj.1.0083 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204554632064 ● Summary page in Scopus @ Elsevier: 2-s2.0-79956280852 (DOI: 10.2343/geochemj.1.0083, CiNii: 1390001204554632064, Elsevier: Scopus)
23.	Yoshio Takahashi, Mika Yamamoto, Yuhei Yamamoto and Kazuya Tanaka : EXAFS study on the cause of enrichment of heavy REEs on bacterial cell surfaces, Geochimica et Cosmochimica Acta, Vol.74, No.19, 5443-5462, 2010. (Link to Publication Site) ● Publication site (DOI): 10.1016/j.gca.2010.07.001 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.gca.2010.07.001 (DOI: 10.1016/j.gca.2010.07.001)
24.	Yuhei Yamamoto, Daisuke Aosai and Takashi Mizuno : Evaluation of behavior of rare earth elements based on determination of chemical state in groundwater in granite, Proceedings of the ASME 13th International Conference on Environmental Remediation and Radioactive Waste Management, Vol.2, 203-212, 2010. (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-80055039234 (Elsevier: Scopus)
25.	Daisuke Aosai, Yuhei Yamamoto and Takashi Mizuno : Development of New Ultrafiltration Techniques Maintaining In-Situ Hydrochemical Conditions for Colloidal Study, Proceedings of the ASME 13th International Conference on Environmental Remediation and Radioactive Waste Management, 2010. (Link to Publication Site) ● Publication site (DOI): 10.1115/ICEM2010-40074 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-80055048580 (DOI: 10.1115/ICEM2010-40074, Elsevier: Scopus)
26.	Yuhei Yamamoto, Yoshio Takahashi and Hiroshi Shimizu : Systematic change in relative stabilities of REE-humic complexes at various metal loading levels, Geochemical Journal, Vol.44, No.1, 39-63, 2010. (Keyword) humic substances / stability constants / metal loading / REE pattern / binding site (Link to Publication Site) ● Publication site (DOI): 10.2343/geochemj.1.0041 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204552210944 ● Summary page in Scopus @ Elsevier: 2-s2.0-77955927112 (DOI: 10.2343/geochemj.1.0041, CiNii: 1390001204552210944, Elsevier: Scopus)
27.	Yuhei Yamamoto, Yoshio Takahashi and Hiroshi Shimizu : Speciation of Iron in Humic Substances by X-ray Absorption Fine Structure and Its Effect on the Complexation between Humic Substances and Trace Metal Ions, Chemistry Letters, Vol.38, No.3, 278-279, 2009. (Link to Publication Site) ● Publication site (DOI): 10.1246/cl.2009.278 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1572824500767770240 ● Search Scopus @ Elsevier (DOI): 10.1246/cl.2009.278 (DOI: 10.1246/cl.2009.278, CiNii: 1572824500767770240)
28.	Yuhei Yamamoto, Yoshio Takahashi, Yutaka Kanai, Yoshio Watanabe, Tomoya Uruga, Hajime Tanida, Yasuko Terada and Hiroshi Shimizu : High-sensitive measurement of uranium L_III-edge X-ray absorption near-edge structure (XANES) for the determination of the oxidation states of uranium in crustal materials, Applied Geochemistry, Vol.23, No.8, 2452-2461, 2008. (Link to Publication Site) ● Publication site (DOI): 10.1016/j.apgeochem.2008.02.005 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.apgeochem.2008.02.005 (DOI: 10.1016/j.apgeochem.2008.02.005)
29.	Yuhei Yamamoto, Yoshio Takahashi and Hiroshi Shimizu : Systematics of Stability Constants of Fulvate Complexes with Rare Earth Ions, Chemistry Letters, Vol.34, No.6, 880-881, 2005. (Link to Publication Site) ● Publication site (DOI): 10.1246/cl.2005.880 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1572261550054591488 ● Search Scopus @ Elsevier (DOI): 10.1246/cl.2005.880 (DOI: 10.1246/cl.2005.880, CiNii: 1572261550054591488)

Academic Paper (Unrefereed Paper):

1.	Yohsuke Sanagawa, Yuya Kurumi, Yuhei Yamamoto and Shoji Imai : 四国の梶ヶ森山頂における樹氷，降雪，冬期降雨中の粒子状物質と黒色浮遊性物質, Natural Science Research, Faculty of Integrated Arts and Sciences, The University of Tokushima, Vol.28, No.2, 7-14, 2014. (Keyword) 冬期降水 / PM2.5 (Tokushima University Institutional Repository) ● Metadata: 106431 (Tokushima University Institutional Repository: 106431)

Review, Commentary:

1.	Ken-Ichi Fushimi, Chernyak Dmitry, Hiroyasu Ejiri, Naoki Chatani, Ryuta Hazama, T. Iida, H. Ikeda, K. Imagawa, K. Inoue, H. Ito, T. Kishimoto, M. Koga, Kenta Kotera, A. Kozlov, K. Nakamura, Reiko Orito, T. Shima, Y. Takemoto, S. Umehara, Y. Urano, Yuhei Yamamoto, K. Yasuda and S. Yoshida : Crystal growth of high-purity NaI(Tl), Journal of the Japanese Association for Crystal Growth, Vol.49, No.4, Jan. 2023. (Keyword) 結晶成長 / 高純度結晶 / 素粒子物理学
2.	Yuhei Yamamoto : Atomization Mechanism of Boron in Graphite Furnace Atomic Absorption Spectrometry -Improvement of analytical performance by Fe modifier and its role-, Scientific Instrument News, Vol.12, 1-8, Apr. 2019.
3.	Yuhei Yamamoto : 中国の国内におけるPM2.5中の微量元素分析, ぶんせき, 2019.
4.	Shoji Imai, Takeshi Kamimura, Kenji Kodama and Yuhei Yamamoto : Analysis of Chemical Species of Water-Insoluble Sulfur Compounds in Rime Ice and Snow and Long-range Transfer Mechanism of Coal Burning Emissions under Winter Monsoon Conditions, Advances in X-Ray Chemical Analysis, Japan, Vol.49, 125-142, Mar. 2018. (Keyword) Sulfur speciation / Inorganic small sphere / SEM-EDX / Coal / WDXRF (Tokushima University Institutional Repository) ● Metadata: 111205 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1050282812443008256 (Tokushima University Institutional Repository: 111205, CiNii: 1050282812443008256)

Proceeding of International Conference:

1.	Yuhei Yamamoto, Yosuke Sanagawa, Yuya Kurumi, Takeshi Kamimura, Kenji Kodama and Shoji Imai : Chemical properties of wet depositions at a remote site in Shikoku highland, Japan, Goldschmidt Conference 2016, Yokohama, Jun. 2016. (Keyword) aerosol
2.	Yuhei Yamamoto, Y. Takahashi, H. Sakami, T. Mizuno, K. Amano, K. Hama and H. Shimizu : Behavior of rare earth elements during chemical alteration of deep granitic rocks at Tono, 21th Annual V.M. Goldschmidt Conference, Prague, Aug. 2011.
3.	Yuhei Yamamoto, D. Aosai, T. Mizuno, K. Watanabe, T. Kogure and Y. Suzuki : A study of colloids in deep groundwater using spectroscopic analysis, American Geophysical Union 2010 Fall Meetion, San Francisco, Dec. 2010.
4.	Yuhei Yamamoto, Y. Takahashi and H. Shimizu : Systematics on the stability constants of REE-humic complexes at various metal loading levels, 18th Annual V.M. Goldschmidt Conference, Vancouver, Jul. 2008.
5.	Yuhei Yamamoto, Y. Takahashi and H. Shimizu : Interpretation of REE patterns in natural water based on the stability constant, 16th Annual V.M. Goldschmidt Conference, Melbourne, Aug. 2006.

Proceeding of Domestic Conference:

1.	Shoji Imai, 繁田大地, 長崎昌太, 上井優佑, 奥田桂子, 中尾佑子 and Yuhei Yamamoto : 四国の渓流水における非海塩性硫酸イオンの分布, 日本分析化学年会第71回, Sep. 2022. (Keyword) 渓流 / 水質 / 非海塩性硫酸イオン
2.	Naomichi Nishii, Yuhei Yamamoto, 菊地洋一 and Shoji Imai : 降雪及び樹氷の融解水中の溶存態と懸濁態の微量元素, 日本分析化学年会第71回, Sep. 2022. (Keyword) 微量元素 / 降雪 / 樹氷 / 溶存態 / 懸濁態
3.	Shunichi Tokoro, Yuhei Yamamoto, 中田亮一, 村瀬遼亮, 田中稜真 and Shoji Imai : ノビアスキレートPA-1固相抽出-二重収束型多重検知ICP-MS法を用いた四国・中国地方において同時採取した夏季降雨中の鉛同位体比による発生源の識別, 第82回分析化学討論会, May 2022. (Keyword) 固相抽出 / heavy metals / 鉛同位体 / 湿性沈着 / ICP-MS
4.	Naomichi Nishii, Yuhei Yamamoto, 豊澤大夢, 岡健太郎, Shunichi Tokoro, Jun Nishimoto, 菊地洋一 and Shoji Imai : 2020年度冬期に四国山岳, 瀬戸内沿岸, 広島県北部, 岩手県山岳で採取した降雪, 降雨及び樹氷中の非水溶性物質の酸分解―ICP-MS 及びGFAAS法による無機微量元素の研究, 第82回分析化学討論会, May 2022. (Keyword) 湿性沈着 / heavy metals / 微量元素 / 非水溶性物質 / ICP-MS
5.	Yuhei Yamamoto : 山岳地域における湿性沈着中の鉛同位体比測定に基づく大気中鉛の発生源解析, 2021年日本化学会中国四国支部大会, Nov. 2021.
6.	Yuhei Yamamoto, 村瀬遼亮, 中田亮一, 永石一弥 and Shoji Imai : 遠隔山岳地域における湿性沈着中の鉛同位体比測定に基づく大気中鉛の発生源解析, 日本分析化学会第70年会, Sep. 2021. (Keyword) 微量元素 / heavy metals / 越境汚染 / エアロゾル
7.	Hiromu Toyosawa, Kentaroh Oka, Yuhei Yamamoto and Shoji Imai : 徳島大学で採取した大気エアロゾル中の微量金属元素, 第81回分析化学討論会, May 2021. (Keyword) 微量元素 / heavy metals / 乾性沈着 / エアロゾル
8.	Yuhei Yamamoto, 村瀬遼亮, Kentaroh Oka and Shoji Imai : 四国山岳地域で採取した降雨中に含まれるNiおよびV, 日本分析化学会第69年会, Sep. 2020. (Keyword) 微量元素 / heavy metals / 越境汚染 / エアロゾル
9.	村瀬遼亮, Ryoma Tanaka, Ryoichi Nakada, Kazuya Nagaishi, Yuhei Yamamoto and Shoji Imai : 四国の山岳地域で同日採取した雪および樹氷中の高分解能MC-ICP-MSを用いた鉛同位体比, 第80回分析化学討論会, May 2020. (Keyword) 微量元素 / 鉛 / 越境汚染 / エアロゾル
10.	Yuhei Yamamoto, Atsuya Higaki and Shoji Imai : 四国の山岳地域における冬季湿性沈着中の非水溶性CdおよびPb, 第80回分析化学討論会, May 2020. (Keyword) 湿性沈着 / 重金属
11.	Yuhei Yamamoto, Hiromu Toyosawa, 村瀬遼亮, Ryoma Tanaka, Genki Takahashi, Genki Hashimoto and Shoji Imai : 四国の山岳地域における湿性沈着中のV，Ni，Cd，Pbの発生源と輸送ルート, 日本分析化学会第68年会, Sep. 2019. (Keyword) 微量元素 / heavy metals / 越境汚染 / エアロゾル
12.	Shoji Imai, Yukiya Miyamoto and Yuhei Yamamoto : GFAAS における種々の原子蒸気とPG表面との物理化学的相互作用, 日本分析化学会第68年会, Sep. 2019. (Keyword) 微量元素 / 原子蒸気 / 原子吸光法
13.	Hiromu Toyosawa, 村瀬遼亮, Ryoma Tanaka, Yuhei Yamamoto and Shoji Imai : 金属元素比を用いた山岳地域における湿性沈着中の微量亜鉛の発生源の推定, 日本分析化学会第68年会, Sep. 2019. (Keyword) 微量元素 / 微量亜鉛 / 越境汚染 / エアロゾル
14.	Yuhei Yamamoto, Hiromu Toyosawa, Ryoma Tanaka, 菊地洋一, Jun Nishimoto and Shoji Imai : 四国・本州の遠隔山岳地域における湿性沈着中の重金属のモニタリング, 第79回分析化学討論会, May 2019. (Keyword) 湿性沈着 / 重金属
15.	土屋真緒, 高野祥太朗, 辻阪誠, Shoji Imai, Yuhei Yamamoto, 申基澈 and 宗林由樹 : 西日本における雨水中Ni, Cu, Zn安定同位体比, 第118回化学研究所研究発表会, Nov. 2018.
16.	土屋真緒, 高野祥太朗, 辻阪誠, Shoji Imai, Yuhei Yamamoto, 申基澈 and 宗林由樹 : 雨水中溶存態Ni, Cu, Zn同位体比分析法の開発, 日本地球化学会第65回年会, Sep. 2018.
17.	Yuhei Yamamoto, Eri Kanekiyo, 清水魁斗, Genki Takahashi, 橋本元輝 and Shoji Imai : 2015年から2018年における国内遠隔山岳地域での降雪降雨中の金属元素組成, 第78年分析化学討論会, May 2018. (Keyword) 降雪 / 降雨
18.	Yuhei Yamamoto, Takashi Yamamoto, 早川慎二郎 and Shoji Imai : X線吸収分光法を用いた大気エアロゾル中の非水溶性硫黄の化学形態分析, 第53回X線分析討論会, Oct. 2017.
19.	Shoji Imai, Takeshi Kamimura, Kenji Kodama and Yuhei Yamamoto : Analysis of Chemical Species of Water-Insoluble Sulfur Compounds in Rime Ice and Snow and Long-range Transfer Mechanism of Coal Burning Emissions under Winter Monsoon Conditions, 第53回X線分析討論会, Oct. 2017. (Keyword) Sulfur speciation / Inorganic small sphere / SEM-EDX / Coal / WDXRF
20.	Yuhei Yamamoto, Takashi Yamamoto, 児玉憲治, 早川慎二郎 and Shoji Imai : 汎用型蛍光X線分析装置を用いた大気エアロゾル中の微量硫黄の化学形態分析, 日本地球化学会第64回年会, Sep. 2017.
21.	Shoji Imai, Yuhei Yamamoto, Takashi Yamamoto, Kenji Kodama, 西本潤 and Yoichi Kikuchi : 蛍光X線分析法を用いた四国の樹氷と日本海沿いの遠隔地における降雪中の不溶性イオウのスペシエーション, 日本分析化学会第66年会, Sep. 2017. (Keyword) 石炭 / 蛍光X線 / XRF / 化学形態 / イオウ
22.	Shoji Imai, Kaito Shimizu, Eri Kanekiyo, Yuhei Yamamoto, Jun Nishimoto and 菊地洋一 : 本州の日本海沿いの山岳における降雪中のPb/Cd濃度比と石炭起源の影響, 日本分析化学会第66年会, Sep. 2017. (Keyword) 石炭 / 山岳 / 越境汚染 / 有害重金属 / 長距離輸送
23.	Shoji Imai, Yuhei Yamamoto, Yukiya Miyamoto, 峯崎正樹 and 小堺久美子 : 黒鉛炉原子吸光法における吸光度プロファイルの減衰過程-2:Tmax>1000K金属・酸化物原子化中間体-, 日本分析化学会第66年会, Sep. 2017. (Keyword) analytical chemistry / 不均一系反応速度論 / 熱平衡 / 黒鉛相互作用 / 原子気体
24.	Yuhei Yamamoto, Kaito Shimizu and Shoji Imai : 遠隔山岳地域で採取されたエアロゾルに対する人口密集地域からの寄与, 第26回環境化学討論会, Jun. 2017. (Keyword) 環境化学 / エアロゾル / 有害金属元素
25.	Yuhei Yamamoto, Fumiya Kita, 磯野成美 and Shoji Imai : 腐植物質と金属イオンの錯生成における競合の影響, 第77回分析化学討論会, May 2017. (Keyword) 分析化学 / 錯体 / 有害金属イオン
26.	Shoji Imai and Yuhei Yamamoto : 黒鉛炉原子吸光法における吸光度プロファイルの減衰過程-1:標準消失過程-, 第77回分析化学討論会, Vol.G2007, May 2017. (Keyword) 分析化学 / 応用分光学 / 不均一系反応速度論
27.	Yuhei Yamamoto, Shoji Imai, 白崎俊浩, 米谷明 and 田上梓 : 黒鉛炉型原子吸光光度計による高温原子化元素の定量における化学修飾剤の化学状態変化が吸光度に及ぼす影響, 日本分析化学会第65回年会, Sep. 2016. (Keyword) analytical chemistry
28.	Shoji Imai, Yuhei Yamamoto, Yuya Kurumi, Yohsuke Sanagawa and Ayumi Saitoh : 日本海沿岸および四国の遠隔地における降雪中のPb/Cd比を用いた長距離輸送機構解明のためのバックグラウンド, 日本分析化学会第65年会北海道大学・札幌, Sep. 2016. (Keyword) 越境汚染 / 降水 / 長距離輸送
29.	Yuhei Yamamoto, Yosuke Sanagawa, Yuya Kurumi, Takeshi Kamimura, Kenji Kodama and Shoji Imai : 四国の山岳地帯における湿性沈着の化学的特徴, 第25回環境化学討論会, Jun. 2016. (Keyword) 越境汚染 / 湿性沈着 / エアロゾル
30.	斉藤あゆみ, Yohsuke Sanagawa, Yuhei Yamamoto and Shoji Imai : 降雨時の大気沈着中微量金属元素濃度の変動, 日本地球化学会第62回年会, Vol.1P07, Sep. 2015. (Keyword) 分析化学 / 地球化学 / 環境化学
31.	Azusa Tagami, Yuhei Yamamoto, 白崎俊宏, 米谷明 and Shoji Imai : 黒鉛炉原子吸光法を用いたホウ素定量における炉寿命に関する研究, 日本分析化学会第64回年会, Vol.F2010Y, Sep. 2015. (Keyword) 分析化学
32.	Shoji Imai, Yuhei Yamamoto, Yuya Kurumi and Ayumi Saitoh : 自由大気層に位置する四国の冬期山岳を利用した越境汚染の評価, 日本分析化学会第64年会, Vol.H2001, Sep. 2015. (Keyword) 環境化学 / 大気汚染 / モニタリング
33.	Yuya Kurumi, Yuhei Yamamoto, 児玉憲治, 上村健 and Shoji Imai : 標高1400m四国の梶ヶ森山頂における冬期越境汚染物質, 第75回分析化学討論会, Vol.C1011, May 2015. (Keyword) 環境化学
34.	Yuhei Yamamoto, Shoji Imai, 白崎俊浩, 米谷明 and Azusa Tagami : 黒鉛炉型原子吸光光度計を用いたホウ素の定量における化学修飾剤の黒鉛炉内での化学状態に関する研究, 日本分析化学会第63回年会, B1008, Sep. 2014. (Keyword) environmental chemistry / analytical chemistry / environmental analytical chemistry
35.	Shoji Imai, 耒見祐哉, 佐名川洋右, Yuhei Yamamoto and 上村健 : 本州と四国山岳での2013年度冬季降雪中のPM2.5相当の一次生成粒子の越境移流経路, 日本分析化学会第63年会広島大, Sep. 2014.
36.	Yuhei Yamamoto : 天然試料の化学状態と分析, 第20回中国四国支部分析化学若手セミナー, B1008, Jul. 2014. (Keyword) environmental chemistry / analytical chemistry / environmental analytical chemistry
37.	Yohsuke Sanagawa, Yuhei Yamamoto and Shoji Imai : 徳島県の大気エアロゾル観測における人為的汚染の評価, 日本分析化学会第62回年会, Sep. 2013. (Keyword) environmental chemistry / air pollutant / analytical chemistry / environmental analytical chemistry
38.	Yuhei Yamamoto, Shoji Imai, 白崎俊浩 and 米谷明 : 黒鉛炉型原子吸光光度計を用いたホウ素の分析における再現性の向上, 日本分析化学会第62回年会, B1008, Sep. 2013. (Keyword) environmental chemistry / analytical chemistry / environmental analytical chemistry
39.	Yuhei Yamamoto, Shoji Imai, 白崎俊浩 and 米谷明 : Determination of boron by graphite furnace atomic absorption spectrometry with chemical modifiers, 第19回中国四国支部分析化学若手セミナー, B1008, Aug. 2013. (Keyword) environmental chemistry / analytical chemistry / environmental analytical chemistry
40.	Yuhei Yamamoto : ICP-MSを用いた天然試料中の微量元素の測定, プラズマ分光分析研究会第88回講演会, B1008, Jun. 2013. (Keyword) environmental chemistry / analytical chemistry / environmental analytical chemistry
41.	Yohsuke Sanagawa, Yuhei Yamamoto and Shoji Imai : 2011, 第73回分析化学討論会, B1008, May 2013. (Keyword) environmental chemistry / air pollutant / analytical chemistry / environmental analytical chemistry
42.	Shoji Imai, Yohsuke Sanagawa, Yuhei Yamamoto and 上村健 : 2011, 第73回分析化学討論会, B1008, May 2013. (Keyword) environmental chemistry / air pollutant / analytical chemistry / environmental analytical chemistry
43.	Yuhei Yamamoto : 地下環境での分析化学「地下水と岩石の世界」, 第17 回徳島地区分析技術セミナー, B1008, Dec. 2012. (Keyword) environmental chemistry / analytical chemistry / environmental analytical chemistry
44.	Daichi Shigeta, Shota Nagasaki, Yohsuke Sanagawa, Yuhei Yamamoto and Shoji Imai : 四国・梶ヶ森山頂における雨氷，降雪，降雨中の化学成分の特徴∼2011年度を中心に∼, 日本分析化学会第61年会, P3046, Sep. 2012. (Keyword) environmental chemistry / air pollutant / analytical chemistry / environmental analytical chemistry
45.	Yuhei Yamamoto, 青才大介 and 水野崇 : 花崗岩地下水中でのREEに関する水 - 岩石反応の解明, 日本地球化学会第58回年会, Sep. 2011.
46.	Yuhei Yamamoto, 高橋嘉夫, 酒見泰, 水野崇, 天野健治, 濱克弘 and 清水洋 : 深部花崗岩の化学変質過程における希土類元素の挙動, 第9回微生物 - 鉱物 - 水 - 大気相互作用研究会, Mar. 2011.
47.	Yuhei Yamamoto, 青才大介 and 水野崇 : 地下水中のコロイド試料回収・分析手法の確立, 日本地球化学会第57回年会, Sep. 2010.
48.	Yuhei Yamamoto, 青才大介 and 水野崇 : 地下環境中での元素の存在状態解明, 第8回微生物 - 鉱物 - 水 - 大気相互作用研究会, Mar. 2010.
49.	Yuhei Yamamoto, 青才大介 and 水野崇 : 花崗岩中の地下水における微量金属元素濃度のサイズ分布特性, 日本地球化学会第56回年会, Sep. 2009.
50.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 腐植物質中の鉄の存在状態解明及び微量元素の錯生成に与える影響, 第7回微生物 - 鉱物 - 水 - 大気相互作用研究会, Mar. 2009.
51.	Yuhei Yamamoto, 高橋嘉夫, 金井豊, 渡部芳夫, 宇留賀朋哉, 谷田肇, 寺田靖子 and 清水洋 : 岩石試料のウランL_III吸収端XANESの蛍光分光法による高感度測定, 日本放射化学会年会第52回放射化学討論会, Sep. 2008.
52.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 腐植物質 - 水酸化鉄共存系における希土類元素の固液分配, 日本地球化学会第55回年会, Sep. 2008.
53.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 希土類元素 - 腐植物質の錯生成反応における結合サイトの推定, 第6回微生物 - 鉱物 - 水 - 大気相互作用研究会, Mar. 2008.
54.	Yuhei Yamamoto, 高橋嘉夫, 金井豊, 渡部芳夫, 宇留賀朋哉, 谷田肇, 寺田靖子 and 清水洋 : 蛍光分光法による岩石試料のウランL_III吸収端XANESの高感度測定, 日本地球化学会第54回年会, Sep. 2007.
55.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 希土類元素の固液分配における有機・無機複合体の影響, 日本地球化学会第54回年会, Sep. 2007.
56.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 腐植物質の影響を考慮した水圏でのREEパターンの定量的解釈とREEの挙動解析, 日本地球化学若手シンポジウム, Oct. 2006.
57.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 腐植物質に対する全希土類元素の錯生成定数決定に基づく水圏での希土類元素の挙動解析, ワークショップ「地下環境における放射性核種の移行に及ぼす溶存有機物の影響評価」, Sep. 2006.
58.	Yuhei Yamamoto, 高橋嘉夫, 金井豊, 渡部芳夫 and 清水洋 : XAFS法による金丸鉱山周辺でのウランの存在状態の解明と挙動解析, 日本地球化学会第53回年会, Sep. 2006.
59.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 腐植物質に対する全希土類元素の錯生成定数決定に基づく水圏での希土類元素の挙動解析, 「放射性廃棄物処分研究ネットワーク」ワークショップ, Aug. 2006.
60.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 腐植物質に対するREEの錯生成定数に基づく水圏でのREEパターンの解釈, 日本地球惑星科学連合2006年大会, May 2006.
61.	Yuhei Yamamoto, 高橋嘉夫 and 清水洋 : 腐植物質に対するREEの錯生成定数に基づく水圏でのREEパターンの解釈, 日本地球化学会第52回年会, Sep. 2005.
62.	Yuhei Yamamoto and 高橋嘉夫 : 全希土類元素に対する腐植物質との錯生成定数の決定に基づく水圏の希土類元素パターンの解析, 日本地球化学会第51回年会, Sep. 2004.

Et cetera, Workshop:

1.	Yuhei Yamamoto : 深部地下水中のコロイド分析, ぶんせき, No.3, 165-166, Mar. 2013. (Keyword) Environmental Chemistry

Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)

Identification of sources of anthropogenic aerosols using vanadium composition and lead isotope ratio origin from coal combustion (Project/Area Number: 20K05585 )
Search by Researcher Number (30571228)

Associate Professor : Yamamoto, Yuhei

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Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)