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Kudo Y, Kumaki F, Nagasaka M, Adachi JI, Noguchi Y, Koga N, Itabashi H, Hiyama M. Experimental and Theoretical Study for Core Excitation of Firefly Luciferin in Carbon K-Edge Spectra. J Phys Chem A 2024; 128:611-617. [PMID: 38227306 DOI: 10.1021/acs.jpca.3c07504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
Carbon (C) K-edge X-ray absorption spectra for firefly luciferin were measured and assigned using time-dependent density functional theoretical calculations for luciferin anion and dianion to elucidate the effect of hydroxy-group deprotonation. It was found that the C K-edge spectra for luciferin had four characteristic peaks. The effect of deprotonation of the hydroxy group appears in the energy difference of the first and second peaks of these spectra. This energy difference is 1.0 eV at pH 7 and 2.3 eV at pH 10. The deprotonation of the hydroxy group can be distinguished based on the soft X-ray absorption spectra.
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Affiliation(s)
- Yuto Kudo
- Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Fumitoshi Kumaki
- Department of Materials Structure Science, School of High Energy Accelerator Science, SOKENDAI (The Graduate University for Advanced Studies), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Masanari Nagasaka
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
- Department of Functional Molecular Science, School of Physical Sciences, SOKENDAI (The Graduate University for Advanced Studies), Myodaiji, Okazaki 444-8585, Japan
| | - Jun-Ichi Adachi
- Department of Materials Structure Science, School of High Energy Accelerator Science, SOKENDAI (The Graduate University for Advanced Studies), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Yoshifumi Noguchi
- Department of Applied Chemistry and Biochemical Engineering, Graduate School of Engineering, Shizuoka University, Johoku 3-5-1, Hamamatsu, Shizuoka 432-8561, Japan
| | - Nobuaki Koga
- Graduate School of Informatics, Nagoya University, Nagoya 464-8601, Japan
| | - Hideyuki Itabashi
- Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
- Gunma University Center for Food Science and Wellness, Maebashi, Gunma 371-8510, Japan
| | - Miyabi Hiyama
- Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
- Gunma University Center for Food Science and Wellness, Maebashi, Gunma 371-8510, Japan
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2
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Suzuki T, Komatsu T, Shibata H, Tanioka A, Vargas D, Kawabata-Iwakawa R, Miura F, Masuda S, Hayashi M, Tanimura-Inagaki K, Morita S, Kohmaru J, Adachi K, Tobo M, Obinata H, Hirayama T, Kimura H, Sakai J, Nagasawa H, Itabashi H, Hatada I, Ito T, Inagaki T. Crucial role of iron in epigenetic rewriting during adipocyte differentiation mediated by JMJD1A and TET2 activity. Nucleic Acids Res 2023; 51:6120-6142. [PMID: 37158274 PMCID: PMC10325906 DOI: 10.1093/nar/gkad342] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 04/10/2023] [Accepted: 04/21/2023] [Indexed: 05/10/2023] Open
Abstract
Iron metabolism is closely associated with the pathogenesis of obesity. However, the mechanism of the iron-dependent regulation of adipocyte differentiation remains unclear. Here, we show that iron is essential for rewriting of epigenetic marks during adipocyte differentiation. Iron supply through lysosome-mediated ferritinophagy was found to be crucial during the early stage of adipocyte differentiation, and iron deficiency during this period suppressed subsequent terminal differentiation. This was associated with demethylation of both repressive histone marks and DNA in the genomic regions of adipocyte differentiation-associated genes, including Pparg, which encodes PPARγ, the master regulator of adipocyte differentiation. In addition, we identified several epigenetic demethylases to be responsible for iron-dependent adipocyte differentiation, with the histone demethylase jumonji domain-containing 1A and the DNA demethylase ten-eleven translocation 2 as the major enzymes. The interrelationship between repressive histone marks and DNA methylation was indicated by an integrated genome-wide association analysis, and was also supported by the findings that both histone and DNA demethylation were suppressed by either the inhibition of lysosomal ferritin flux or the knockdown of iron chaperone poly(rC)-binding protein 2. In summary, epigenetic regulations through iron-dependent control of epigenetic enzyme activities play an important role in the organized gene expression mechanisms of adipogenesis.
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Affiliation(s)
- Tomohiro Suzuki
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
| | - Tetsuro Komatsu
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
| | - Hiroshi Shibata
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
| | - Akiko Tanioka
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
| | - Diana Vargas
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
| | - Reika Kawabata-Iwakawa
- Division of Integrated Oncology Research, Gunma University Initiative for Advanced Research, Gunma University, Gunma371-8511, Japan
| | - Fumihito Miura
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka 812-8582, Japan
| | - Shinnosuke Masuda
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
| | - Mayuko Hayashi
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
| | - Kyoko Tanimura-Inagaki
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
- Department of Endocrinology, Metabolism and Nephrology, Graduate School of Medicine, Nippon Medical School, Tokyo 113-8602, Japan
| | - Sumiyo Morita
- Laboratory of Genome Science, Biosignal Genome Resource Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
| | - Junki Kohmaru
- Institute for Molecular and Cellular Regulation Joint Usage/Research Support Center, Gunma University, Gunma371-8512, Japan
| | - Koji Adachi
- Kaihin Makuhari Laboratory, PerkinElmer Japan Co., Ltd., Chiba261-8501, Japan
| | - Masayuki Tobo
- Institute for Molecular and Cellular Regulation Joint Usage/Research Support Center, Gunma University, Gunma371-8512, Japan
| | - Hideru Obinata
- Education and Research Support Center, Gunma University Graduate School of Medicine, Gunma371-8511, Japan
| | - Tasuku Hirayama
- Laboratory of Pharmaceutical and Medicinal Chemistry, Gifu Pharmaceutical University, Gifu501-1196, Japan
| | - Hiroshi Kimura
- Cell Biology Center, Tokyo Institute of Technology, Kanagawa226-8503, Japan
| | - Juro Sakai
- Division of Metabolic Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo153-8904, Japan
- Division of Molecular Physiology and Metabolism, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Hideko Nagasawa
- Laboratory of Pharmaceutical and Medicinal Chemistry, Gifu Pharmaceutical University, Gifu501-1196, Japan
| | - Hideyuki Itabashi
- Graduate School of Science and Technology, Gunma University, Gunma376-8515, Japan
| | - Izuho Hatada
- Laboratory of Genome Science, Biosignal Genome Resource Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
- Viral Vector Core, Gunma University Initiative for Advanced Research, Gunma371-8511, Japan
| | - Takashi Ito
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka 812-8582, Japan
| | - Takeshi Inagaki
- Laboratory of Epigenetics and Metabolism, Institute for Molecular and Cellular Regulation, Gunma University, Gunma371-8512, Japan
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3
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Ono R, Osawa K, Takahashi Y, Noguchi Y, Kitada N, Saito-Moriya R, Hirano T, Maki SA, Shibata K, Akiyama H, Kanno KI, Itabashi H, Hiyama M. Quantum yield of near-infrared bioluminescence with firefly luciferin analog: AkaLumine. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Kumagai R, Ono R, Sakimoto S, Suzuki C, Kanno KI, Aoyama H, Usukura J, Kobayashi M, Akiyama H, Itabashi H, Hiyama M. Photo-cleaving and photo-bleaching quantum yields of coumarin-caged luciferin. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Uchiyama A, Fujiwara C, Inoue Y, Uchida K, Hiyama M, Itabashi H, Motegi S. The effect of balneotherapy with natural mineral dissolved water on dry skin in atopic dermatitis: A phase IIa, nonrandomized, controlled study. J Cutan Immunol Allergy 2021. [DOI: 10.1002/cia2.12195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Akihiko Uchiyama
- Department of Dermatology Gunma University Graduate School of Medicine Maebashi Japan
| | - Chisako Fujiwara
- Department of Dermatology Gunma University Graduate School of Medicine Maebashi Japan
| | - Yuta Inoue
- Department of Dermatology Gunma University Graduate School of Medicine Maebashi Japan
| | - Kazushi Uchida
- Graduate School of Science and Technology Gunma University Kiryu Japan
| | - Miyabi Hiyama
- Graduate School of Science and Technology Gunma University Kiryu Japan
| | - Hideyuki Itabashi
- Graduate School of Science and Technology Gunma University Kiryu Japan
| | - Sei‐ichiro Motegi
- Department of Dermatology Gunma University Graduate School of Medicine Maebashi Japan
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7
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Ogawa H, Ono R, Noguchi Y, Kitada N, Saito-Moriya R, Maki SA, Akiyama H, Itabashi H, Hiyama M. Absorption Spectra for Firefly Bioluminescence Substrate Analog: TokeOni in Various pH Solutions. Photochem Photobiol 2021; 97:1016-1022. [PMID: 34081790 DOI: 10.1111/php.13458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/01/2021] [Indexed: 01/24/2023]
Abstract
AkaLumine hydrochloride, named TokeOni, is one of the firefly luciferin analogs, and its reaction with firefly luciferase produces near-infrared (NIR) bioluminescence. Prior to studying the bioluminescence mechanism, basic knowledge about the chemical structures, electronic states, and absorption properties of TokeOni at various pH values of solution has to be acquired. In this paper, the absorption spectra for TokeOni and AkaLumine at pH 2-10 were measured. Density functional theory (DFT) calculations, time-dependent DFT calculations, and the vibrational analyses were carried out. The absorption spectra indicate that the chemical forms of TokeOni in solutions are same as those of AkaLumine. The peaks at pH 7-10 in the absorption spectra correspond to the excitation from the ground state of a carboxylate anion of AkaLumine, the peak at pH 2 corresponds to the excitation from the ground state of a carboxylate anion with an N-protonated thiazoline ring and N-protonated dimethylamino group of AkaLumine, and the peak at pH 4 corresponds to the excitation from the ground state of a carboxylate anion with an N-protonated thiazoline ring of AkaLumine.
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Affiliation(s)
- Haruhisa Ogawa
- Graduate School of Science and Technology, Gunma University, Gunma, Japan
| | - Ryohei Ono
- Graduate School of Science and Technology, Gunma University, Gunma, Japan.,Institute for Solid State Physics, The University of Tokyo, Chiba, Japan
| | - Yoshifumi Noguchi
- Department of Applied Chemistry and Biochemical Engineering, Graduate School of Engineering, Shizuoka University, Shizuoka, Japan
| | - Nobuo Kitada
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu, Tokyo, Japan.,Center for Neuroscience and Biomedical Engineering (CNBE), The University of Electro-Communications, Chofu, Tokyo, Japan
| | - Ryohei Saito-Moriya
- School of Pharmacy, Tokyo University of Pharmacy & Life Sciences, Hachioji, Tokyo, Japan
| | - Shojiro A Maki
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu, Tokyo, Japan.,Center for Neuroscience and Biomedical Engineering (CNBE), The University of Electro-Communications, Chofu, Tokyo, Japan
| | - Hidefumi Akiyama
- Institute for Solid State Physics, The University of Tokyo, Chiba, Japan.,AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), Kashiwa, Chiba, Japan
| | - Hideyuki Itabashi
- Graduate School of Science and Technology, Gunma University, Gunma, Japan
| | - Miyabi Hiyama
- Graduate School of Science and Technology, Gunma University, Gunma, Japan.,Institute for Solid State Physics, The University of Tokyo, Chiba, Japan
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Ishii T, Mori M, Hisayasu S, Tamura R, Ikuta Y, Fujishiro F, Ozaki JI, Itabashi H, Mori M. Direct conversion of lignin to high-quality graphene-based materials via catalytic carbonization. RSC Adv 2021; 11:18702-18707. [PMID: 35478608 PMCID: PMC9033452 DOI: 10.1039/d1ra02491d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 05/17/2021] [Indexed: 11/21/2022] Open
Abstract
Directly converting lignin to graphene via catalytic carbonization is expected to expand the industrial use of lignin and graphene-based materials.
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Affiliation(s)
- Takafumi Ishii
- International Research and Education Center for Element Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Mikaru Mori
- Faculty of Science and Technology
- Kochi University
- Kochi 780-8072
- Japan
| | - Shiguma Hisayasu
- Graduate School of Science and Technology
- Kochi University
- Kochi 780-8072
- Japan
| | - Ryusuke Tamura
- Graduate School of Science and Technology
- Kochi University
- Kochi 780-8072
- Japan
| | - Yuki Ikuta
- Graduate School of Science and Technology
- Kochi University
- Kochi 780-8072
- Japan
| | - Fumito Fujishiro
- Faculty of Science and Technology
- Kochi University
- Kochi 780-8072
- Japan
- Graduate School of Science and Technology
| | - Jun-ichi Ozaki
- International Research and Education Center for Element Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | | | - Masanobu Mori
- Faculty of Science and Technology
- Kochi University
- Kochi 780-8072
- Japan
- Graduate School of Science and Technology
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9
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Mori M, Aoyagi K, Tomoda T, Ishikawara F, Sakamoto S, Myochin H, Kuga M, Kozaki D, Ohshima N, Izumi T, Itabashi H, Shoho Y, Yoshida A, Tsunekawa K, Kimura T, Murakami M. Simultaneous capillary electrophoresis of anions and cations in a single injection using an anion exchanger-modified capillary for determination of salivary ions in combination with statistical analyses. J Chromatogr A 2020; 1635:461647. [PMID: 33291035 DOI: 10.1016/j.chroma.2020.461647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 10/23/2022]
Abstract
This paper describes the simultaneous capillary electrophoresis (CE) of anions and cations using an anion exchange-modified capillary, which was prepared by chemical coating with a cationic silylating reagent, and its application to saliva analysis. The CE method provides high-throughput (5 min for a single sample injection) analysis by generating a high-velocity electroosmotic flow at pH 3.0-3.5. The detection limits at a signal-to-noise ratio of 3 ranged from 1.2 to 18 μM for anions and 1.0 to 2.7 μM for cations. The relative standard deviations for the migration times and peak areas of analytes (n = 4) ranged from 0.05% to 0.40% and 0.94% to 4.7%, respectively. The CE system was used to analyze 11 common ions in saliva samples collected from long-distance runners and sedentary university students before and after running for a set distance or a set time. Interestingly, the SCN- concentrations decreased in the saliva samples of all 14 athletes and 16 sedentary students after running. Furthermore, when the concentrations of the analyzed ions were compared with that of cortisol as a typical stress marker by multiple regression analysis, SCN- and NO3- in saliva samples from the two subject groups strongly correlated with cortisol levels, as determined by an electrochemiluminescence immunoassay. This study improves our knowledge of both the analytical methodology for CE and statistical methods for identifying common ions that could be used as physical stress markers.
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Affiliation(s)
- Masanobu Mori
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan.
| | - Keisuke Aoyagi
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Toshihiro Tomoda
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Fumi Ishikawara
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Shou Sakamoto
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Hironori Myochin
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Midori Kuga
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Daisuke Kozaki
- Department of Chemistry and Life Science, Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan
| | - Noriyasu Ohshima
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Takashi Izumi
- Department of Biochemistry, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan; Faculty of Health Care, Teikyo Heisei University, 2-51-4, Higashiikebukuro, Toshima-ku, Tokyo, 170-8445, Japan
| | - Hideyuki Itabashi
- Department of Chemical Engineering, Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Yoshifumi Shoho
- Faculty of Education, Ikuei University, 1656-1, Kyoume-machi, Takasaki, Gunma 370-0011, Japan
| | - Akihiro Yoshida
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Katsuhiko Tsunekawa
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Takao Kimura
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
| | - Masami Murakami
- Department of Clinical Laboratory Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan
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10
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Sugita T, Kobayashi K, Yamazaki T, Isaka M, Itabashi H, Mori M. Development of evaluation method for photocatalytic ability by ion chromatography combined with a flow-type reactor: Application to immobilized photocatalyst materials prepared by double-layer coating method. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Wada N, DI G, Itabashi H, Mori M, Lin Y, Deng S, Xu W, Guo W, Luo Y, Zhu D. Variations in Cadmium Concentrations in Rice and Oxidation-Reduction Potential at the Soil Surface with Supplementation of Fermented Botanical Waste-based Amendment in Large-scale Farmland. ANAL SCI 2020; 36:531-538. [PMID: 32173674 DOI: 10.2116/analsci.19sbp01] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We monitored the relationship between the cadmium (Cd) concentration uptake of rice and the oxidation-reduction potential (ORP) at the soil surface with the supplementation of fermented botanical waste-based amendment (FBWA), an organic fertilizer prepared from woody and food wastes. This study was carried out for 3 years in the western part of Jiangsu Province, China. It was found that the Cd concentration taken up by rice was correlated to a decreased the ORP of the cultivated soil. The yield of rice was ∼1.20 times higher than that of the control plot. The effects of reducing the Cd content in rice and increasing the rice yield remained for 2 years after FBWA application. Finally, Cd was immobilized in the soil with adsorption to FBWA or the decomposed products. The ORP measurement during rice cultivation might be a key index to predict the suppression effect of Cd uptake into the rice or limitation of the sustainable effect by the FBWA.
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Affiliation(s)
- Nobuhiko Wada
- Graduate School of Science and Technology, Gunma University.,Shanghai Shenglong Environment Remediation Materials, Co. Ltd
| | - Gao DI
- Graduate School of Science and Technology, Gunma University
| | | | | | - Yusuo Lin
- Nanjing Institute of Environmental Science, MEP, P. R. China
| | - Shaopo Deng
- Nanjing Institute of Environmental Science, MEP, P. R. China
| | - Weiwei Xu
- Geological Survey of Jiangsu Province
| | - Weiwei Guo
- Shanghai Shenglong Environment Remediation Technologies, Co. Ltd
| | - Yuanheng Luo
- Shanghai Shenglong Environment Remediation Technologies, Co. Ltd
| | - Dianyu Zhu
- School of the Environment, Nanjing University
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Kasamatsu Y, Kondo N, Nakamura K, Kuboki Y, Ninomiya H, Shigekawa Y, Watanabe E, Yasuda Y, Toyomura K, Nagase M, Yokokita T, Komori Y, Haba H, Yoshimura T, Itabashi H, Shinohara A. Solvent Extraction of Zr and Hf from HCl by Aliquat 336 using a Flow-Type Extraction Apparatus Toward Online Chemical Studies of Element 104, Rutherfordium. Solvent Extraction and Ion Exchange 2020. [DOI: 10.1080/07366299.2020.1726075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Narumi Kondo
- Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Kouhei Nakamura
- Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Yuki Kuboki
- National Institute of Technology, Ibaraki College, Hitachinaka, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Japan
| | - Hidemi Ninomiya
- Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Yudai Shigekawa
- Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Eisuke Watanabe
- Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Yuki Yasuda
- Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Keigo Toyomura
- Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Masahiro Nagase
- Graduate School of Science, Osaka University, Toyonaka, Japan
| | - Takuya Yokokita
- Graduate School of Science, Osaka University, Toyonaka, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Japan
| | - Yukiko Komori
- Graduate School of Science, Osaka University, Toyonaka, Japan
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Japan
| | - Hiromitsu Haba
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Japan
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13
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Yoshii S, Mori M, Kozaki D, Hosokawa T, Itabashi H. Utilization of Anion-exchange Guard Column as an Ion Chromatographic Column of Anions Including Application to Simultaneous Separation of Anions and Cations. ANAL SCI 2019; 35:1117-1122. [PMID: 31231089 DOI: 10.2116/analsci.19p146] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study demonstrated that a guard column containing anion-exchange resin has the potential for use as a separation column for acid eluent. Specifically, a 1-cm long anion-exchange guard column with a 4.6-mm internal diameter provided good separation of monovalent inorganic anions, by elution of 8 mM tartaric acid or 4 mM malic acid. Using the guard column with acid eluent could be applied to evaluation of nitrite and nitrate ions in mountain and urban river water samples. When the guard column was connected in front of a cation-exchange separation column (15 cm long × 4.6 mm internal diameter) in a series, the system provided simultaneous separation of anions and cations in eluent of 8 mM tartaric acid and 0.5 mM 18-crown-6 ether by a single injection.
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Affiliation(s)
- Sakura Yoshii
- Graduate School of Science and Technology, Gunma University
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14
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Zhao M, Shinozaki H, Itabashi H, Kozaki D, Mori M. Dynamic Four-step Sequential Extraction Procedure Using a Four-channel Circulating Flow System for Extracting Cd, Cu, Pb, and Zn from Solid Environmental Samples. ANAL SCI 2019; 35:1089-1096. [PMID: 31204369 DOI: 10.2116/analsci.19p077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A method for extracting metals from solid samples was developed. The system had four flow channels (each containing a column packed with a solid sample), a single-flow peristaltic pump, and eight six-port valves. An extractant was passed into each channel for a specified period, then the valves were closed. We evaluated the system by performing a four-step sequential extraction procedure to extract heavy metals from a lake sediment sample. The four extractants were, in order of use, magnesium chloride, ammonium acetate, hydroxylamine hydrochloride, and hydrochloric acid. The concentrations of the analytes extracted agreed well with the concentrations determined using the batch method. The system was also successfully used to analyze heavy metals in a soil sample from a parking lot and fly ash from a domestic waste disposal facility. The total amount of extractant required per sample using the system was two-thirds of the amount required using the batch method.
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Affiliation(s)
- Meichao Zhao
- Graduate School of Science and Technology, Gunma University
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Sun X, Kobayashi S, Tokue A, Itabashi H, Mori M. Enhanced radiocesium uptake by rice with fermented bark and ammonium salt amendments. J Environ Radioact 2019; 202:59-65. [PMID: 30798153 DOI: 10.1016/j.jenvrad.2019.02.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 02/05/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
There are ongoing problems with radioactive cesium (Cs) contaminated agricultural soil after the Fukushima Daiichi Nuclear Power Plant accident. In this study, the behavior of Cs uptake by rice plants grown in soil sprayed with fermented bark amendment (FBA) was investigated. In rice cultivation by pot, the application of FBA resulted in the acceleration of Cs uptake by rice plants. This might be related to the reduction of oxidation reduction potential in the soil caused by spraying FBA. Also, when 0.1 wt% ammonium sulfate was used as a fertilizer in Cs-contaminated soil, the bioconcentration factor (BCF) of Cs taken up into rice straw was 1.4-times higher than that in soil sprayed with FBA. The Cs uptake effect was further enhanced by the combination of 1 wt% FBA with 0.1 wt% ammonium sulfate to soil where the BCF was enhanced to 1.8-times higher than that in soil sprayed with FBA alone. The enhanced uptake into rice was likely because of accelerated uptake of leachable forms of Cs based on the cation-exchange to NH4+ in soil; this was confirmed by the Cs fractionation by sequential extraction procedures. The phytoremediation capability of rice is considered to be lower than that of commonly used phytoremediation plants, but supplementation with FBA and ammonium salt could enhance Cs accumulation even for low-efficiency phytoremediation plants.
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Affiliation(s)
- Xiaotong Sun
- Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
| | - Shizusa Kobayashi
- Graduate School of Agriculture, Hokkaido University, 9-9, Kita-ku, Kita, 060-8589, Japan
| | - Ai Tokue
- Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
| | - Hideyuki Itabashi
- Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
| | - Masanobu Mori
- Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan.
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16
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Sun X, Mo H, Hatano KI, Itabashi H, Mori M. Simultaneous suppression of magnetic nanoscale powder and fermented bark amendment for arsenic and cadmium uptake by radish sprouts grown in agar medium. Environ Sci Pollut Res Int 2019; 26:14483-14493. [PMID: 30877534 DOI: 10.1007/s11356-019-04756-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
In this study, we effectively suppressed arsenic and cadmium uptake into a plant using magnetic nanoparticle powder (MNP) and fermented bark amendment (FBA) in agar medium. The MNP (which consists of FeO·Fe2O3) quantitatively adsorbed arsenite (As(III)) and the FBA (which mainly consists of bark waste) adsorbed cadmium, regardless of the pH. The properties of MNP and FBA in agar medium were compared based on the amounts of arsenic and cadmium in cultivated radish sprouts. While adding FBA selectively suppressed cadmium uptake by radishes, adding MNP suppressed the uptake of both arsenic and cadmium. Considering that the uptake of analytes was slightly reduced even in agar without any additives, the agar itself might also have contributed to the suppression of analyte uptake into plants. In addition, even when radish sprouts were cultivated in agar containing arsenic and cadmium (100 μg/L each) mixed with 25 g MNP and 1.25 g FBA per 25 mL agar, arsenic and cadmium absorption decreased by 90% and 82%, respectively, versus agar without additives. Furthermore, adding the mixed amendment to agar accelerated the growth of radishes, whereas MNP significantly inhibited radish growth even though it reduced analyte uptake. Our results indicated that mixing inorganic and organic adsorbents could simultaneously inhibit cadmium and arsenic uptake by plants and accelerate plant growth in the cadmium and arsenic-contaminated agar medium.
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Affiliation(s)
- Xiaotong Sun
- Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho,, Kiryu, Gunma, 376-8515, Japan
| | - Huijiao Mo
- Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho,, Kiryu, Gunma, 376-8515, Japan
| | - Ken-Ichi Hatano
- Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho,, Kiryu, Gunma, 376-8515, Japan
| | - Hideyuki Itabashi
- Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho,, Kiryu, Gunma, 376-8515, Japan
| | - Masanobu Mori
- Faculty of Science and Technology, Kochi University, 2-5-1, Akebono-cho, Kochi, 780-8520, Japan.
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Zhao M, Wada N, Shinozaki H, Seko N, Mori M, Itabashi H. Monitoring of the Palladium Concentration in River Water and Sediment at an Acidic Hot Spring Spa Area in Gunma Prefecture. ANAL SCI 2018; 34:1357-1364. [PMID: 30122735 DOI: 10.2116/analsci.18p211] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In an effort to elucidate the deposition pathway of Pd in river sediments, we analyzed the amount of Pd in the river water and sediments of the Yukawa and Yazawa rivers, as well as in the sediments of the Shinaki dam-lake of the Kusatsu hot-spring area, which is located northwest in Gunma Prefecture of Japan. The crystal structures and elemental compositions of the river sediment samples differed significantly before and after neutralization. This was attributed to the lime input, which also affected the Pd abundance ratio obtained by the sequential extraction procedure. Additionally, the low leachability of Pd in the sediment suggested possible difficulties in its recovery. Considering the analysis of the Pd variation in the environments, it was concluded that the Pd content in the sediment of the Shinaki dam-lake was mainly supplied by the Yukawa river water inflowing the surrounding tributary rivers and hot-spring waters before neutralization, rather than the lime input.
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Affiliation(s)
- Meichao Zhao
- Graduate School of Science and Technology, Gunma University
| | - Nobuhiko Wada
- Graduate School of Science and Technology, Gunma University.,Shanghai Shenglong Environment Remediation Technologies, Co., Ltd
| | | | - Noriaki Seko
- National Institutes for Quantum and Radiological Science and Technology (QST), Quantum Beam Science Research Directorate, Takasaki Advanced Radiation Research Institute
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Mori M, Sugita T, Fujii K, Yamazaki T, Isaka M, Kobayashi K, Iwamoto S, Itabashi H. Evaluation of Photocatalytic Abilities by Variation of Conductivity and Dimethyl Sulfoxide: Photocatalytically Active TiO 2-coated Wire Mesh Prepared via a Double-layer Coating Method. ANAL SCI 2018; 34:1449-1453. [PMID: 30224563 DOI: 10.2116/analsci.18n012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Herein, we evaluated the quality of a double-layer coating method to stably immobilize photocatalysts by photodecomposition of dimethyl sulfoxide (DMSO) on a stainless-steel wire mesh using a flow analytical system, which included the reactor and conductimetric detector (FAS-CD). The prepared photocatalyst consisted of an amorphous titanium peroxide sol layer and a layer of a sol mixture containing TiO2 and amorphous titanium peroxide. Stable photocatalytic activity was demonstrated through successive photodecomposition tests of DMSO using FAS-CD/equipment.
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Affiliation(s)
| | - Tsuyoshi Sugita
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA)
| | - Kengo Fujii
- Graduate School of Science and Technology, Gunma University
| | - Taiki Yamazaki
- Graduate School of Science and Technology, Gunma University
| | - Mayu Isaka
- Graduate School of Science and Technology, Gunma University
| | | | - Shinji Iwamoto
- Graduate School of Science and Technology, Gunma University
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Mori M, Kotaki K, Gunji F, Kubo N, Kobayashi S, Ito T, Itabashi H. Suppression of cadmium uptake in rice using fermented bark as a soil amendment. Chemosphere 2016; 148:487-94. [PMID: 26841291 DOI: 10.1016/j.chemosphere.2016.01.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Revised: 12/27/2015] [Accepted: 01/04/2016] [Indexed: 05/07/2023]
Abstract
The contamination of rice paddies with heavy metals has become a serious concern due to their high toxicity to human health. In this study, we developed a chemical-free, fermented bark amendment (FBA) and used it for organic rice cultivation. The application of FBA resulted in the fixation of heavy metals, especially cadmium (Cd), in the soil and suppressed their uptake in brown rice. The suppression of Cd uptake was most effective, since its uptake in rice from FBA-supplemented soil was 10 times lower than that from untreated soil under ordinary water-filling conditions. These results could be explained by the rapid conversion of sulfate ions to sulfide ions, which subsequently react with Cd producing insoluble sulfide species, as well as Cd adsorption to the decomposed bark in soil. The FBA did not affect the uptake of metals, such as calcium and iron, which are necessary for the growth of rice. Thus, the FBA may suppress Cd uptake in rice, and its effectiveness is related to application time and water regime.
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Affiliation(s)
- Masanobu Mori
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
| | - Kenta Kotaki
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Fumine Gunji
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Naoyuki Kubo
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Shizusa Kobayashi
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Tsukasa Ito
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Hideyuki Itabashi
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
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20
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Mori M, Ishikawara F, Tomoda T, Yamada S, Okamoto M, Itabashi H, Seki Y, Matsumoto R, Shoho Y, Martha L, Sumino H, Murakami M. Use of capillary electrophoresis with dual-opposite end injection for simultaneous analysis of small ions in saliva samples from wrestlers undergoing a weight training program. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1012-1013:178-85. [DOI: 10.1016/j.jchromb.2016.01.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 01/18/2016] [Accepted: 01/21/2016] [Indexed: 11/24/2022]
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21
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Mori M, Nakano K, Sasaki M, Shinozaki H, Suzuki S, Okawara C, Miró M, Itabashi H. Dynamic leaching and fractionation of trace elements from environmental solids exploiting a novel circulating-flow platform. Talanta 2016; 148:617-25. [PMID: 26653492 DOI: 10.1016/j.talanta.2015.06.081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/23/2015] [Accepted: 06/26/2015] [Indexed: 10/23/2022]
Abstract
A dynamic flow-through microcolumn extraction system based on extractant re-circulation is herein proposed as a novel analytical approach for simplification of bioaccessibility tests of trace elements in sediments. On-line metal leaching is undertaken in the format of all injection (AI) analysis, which is a sequel of flow injection analysis, but involving extraction under steady-state conditions. The minimum circulation times and flow rates required to determine the maximum bioaccessible pools of target metals (viz., Cu, Zn, Cd, and Pb) from lake and river sediment samples were estimated using Tessier's sequential extraction scheme and an acid single extraction test. The on-line AIA method was successfully validated by mass balance studies of CRM and real sediment samples. Tessier's test in on-line AI format demonstrated to be carried out by one third of extraction time (6h against more than 17 h by the conventional method), with better analytical precision (<9.2% against >15% by the conventional method) and significant decrease in blank readouts as compared with the manual batch counterpart.
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Affiliation(s)
- Masanobu Mori
- Department of Environmental Engineering Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu Gunma 376-8515, Japan.
| | - Koji Nakano
- Department of Environmental Engineering Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu Gunma 376-8515, Japan
| | - Masaya Sasaki
- Department of Environmental Engineering Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu Gunma 376-8515, Japan
| | - Haruka Shinozaki
- Department of Environmental Engineering Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu Gunma 376-8515, Japan
| | - Shiho Suzuki
- Department of Environmental Engineering Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu Gunma 376-8515, Japan
| | - Chitose Okawara
- Department of Environmental Engineering Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu Gunma 376-8515, Japan
| | - Manuel Miró
- FI-TRACE group, Department of Chemistry, University of the Balearic Islands, Carretera de Valldemossa km 7.5, E-07122 Palma de Mallorca, Illes Balears, Spain
| | - Hideyuki Itabashi
- Department of Environmental Engineering Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu Gunma 376-8515, Japan
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Mori M, Sagara K, Arai K, Nakatani N, Ohira SI, Toda K, Itabashi H, Kozaki D, Sugo Y, Watanabe S, Ishioka NS, Tanaka K. Simultaneous analysis of silicon and boron dissolved in water by combination of electrodialytic salt removal and ion-exclusion chromatography with corona charged aerosol detection. J Chromatogr A 2015; 1431:131-137. [PMID: 26755416 DOI: 10.1016/j.chroma.2015.12.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 12/16/2015] [Accepted: 12/18/2015] [Indexed: 11/17/2022]
Abstract
Selective separation and sensitive detection of dissolved silicon and boron (DSi and DB) in aqueous solution was achieved by combining an electrodialytic ion isolation device (EID) as a salt remover, an ion-exclusion chromatography (IEC) column, and a corona charged aerosol detector (CCAD) in sequence. DSi and DB were separated by IEC on the H(+)-form of a cation exchange resin column using pure water eluent. DSi and DB were detected after IEC separation by the CCAD with much greater sensitivity than by conductimetric detection. The five-channel EID, which consisted of anion and cation acceptors, cathode and anode isolators, and a sample channel, removed salt from the sample prior to the IEC-CCAD. DSi and DB were scarcely attracted to the anion accepter in the EID and passed almost quantitatively through the sample channel. Thus, the coupled EID-IEC-CCAD device can isolate DSi and DB from artificial seawater and hot spring water by efficiently removing high concentrations of Cl(-) and SO4(2-) (e.g., 98% and 80% at 0.10molL(-1) each, respectively). The detection limits at a signal-to-noise ratio of 3 were 0.52μmolL(-1) for DSi and 7.1μmolL(-1) for DB. The relative standard deviations (RSD, n=5) of peak areas were 0.12% for DSi and 4.3% for DB.
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Affiliation(s)
- Masanobu Mori
- Graduate School of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
| | - Katsuya Sagara
- Graduate School of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Kaori Arai
- Graduate School of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Nobutake Nakatani
- Department of Environmental and Symbiotic Sciences, College of Agriculture, Food and Environmental Science, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan
| | - Shin-Ichi Ohira
- Department of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
| | - Kei Toda
- Department of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
| | - Hideyuki Itabashi
- Graduate School of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Daisuke Kozaki
- Faculty of Industrial Sciences and Technology, University Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang Kuantan, Pahang Darul Makmur, Malaysia
| | - Yumi Sugo
- Medical Radioisotope Application Group, Biotechnology and Medical Application Division, Quantum Beam Science Center, Japan Atomic Energy Agency, Takasaki, Gunma 370-1292, Japan
| | - Shigeki Watanabe
- Medical Radioisotope Application Group, Biotechnology and Medical Application Division, Quantum Beam Science Center, Japan Atomic Energy Agency, Takasaki, Gunma 370-1292, Japan
| | - Noriko S Ishioka
- Medical Radioisotope Application Group, Biotechnology and Medical Application Division, Quantum Beam Science Center, Japan Atomic Energy Agency, Takasaki, Gunma 370-1292, Japan
| | - Kazuhiko Tanaka
- Department of Applied Chemistry, Chubu University, 1200, Matsumoto-cho, Kasugai-shi, Aichi 487-8501, Japan
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Mori M, Masuno T, Kozaki D, Nakatani N, Tanaka K, Itabashi H. Cations on Ion Chromatography by Phosphate-Coated Zirconia Stationary Phase Column. ACTA CHROMATOGR 2015. [DOI: 10.1556/achrom.27.2015.4.13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Yoshihara T, Hosaka M, Terata M, Ichikawa K, Murayama S, Tanaka A, Mori M, Itabashi H, Takeuchi T, Tobita S. Intracellular and in Vivo Oxygen Sensing Using Phosphorescent Ir(III) Complexes with a Modified Acetylacetonato Ligand. Anal Chem 2015; 87:2710-7. [DOI: 10.1021/ac5040067] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Toshitada Yoshihara
- Department
of Chemistry and Chemical Biology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Masahiro Hosaka
- Department
of Biotechnology, Akita Prefectural University, Shimoshinjo, Akita 010-0195, Japan
| | - Motoki Terata
- Department
of Biotechnology, Akita Prefectural University, Shimoshinjo, Akita 010-0195, Japan
| | - Kazuki Ichikawa
- Department
of Chemistry and Chemical Biology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Saori Murayama
- Department
of Chemistry and Chemical Biology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Asami Tanaka
- Department
of Chemistry and Chemical Biology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Masanobu Mori
- Department
of Environmental Engineering Science, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Hideyuki Itabashi
- Department
of Environmental Engineering Science, Gunma University, Kiryu, Gunma 376-8515, Japan
| | | | - Seiji Tobita
- Department
of Chemistry and Chemical Biology, Gunma University, Kiryu, Gunma 376-8515, Japan
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Nakamura M, Jin K, Kato K, Itabashi H, Kakisaka Y, Iwasaki M, Nakasato N. P118: Difference in sleep architecture between left and right temporal lobe epilepsy. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50263-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Sato N, Mori M, Itabashi H. Cloud point extraction of Cu(II) using a mixture of triton X-100 and dithizone with a salting-out effect and its application to visual determination. Talanta 2013; 117:376-81. [DOI: 10.1016/j.talanta.2013.08.025] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 08/13/2013] [Accepted: 08/15/2013] [Indexed: 11/28/2022]
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Sugita T, Mori M, Nakane H, Mase A, Itabashi H. Preparation of Hydroxyapatite-coated Anatase by Photoinduced Superhydrophilic Reaction of TiO 2 for Water Purification. CHEM LETT 2013. [DOI: 10.1246/cl.2013.209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | | | - Akinori Mase
- Graduate School of Engineering, Gunma University
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Mori M, Sugita T, Mase A, Funatogawa T, Kikuchi M, Aizawa K, Kato S, Saito Y, Ito T, Itabashi H. Photodecomposition of humic acid and natural organic matter in swamp water using a TiO(2)-coated ceramic foam filter: potential for the formation of disinfection byproducts. Chemosphere 2013; 90:1359-1365. [PMID: 22921646 DOI: 10.1016/j.chemosphere.2012.07.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 07/24/2012] [Accepted: 07/25/2012] [Indexed: 06/01/2023]
Abstract
This paper reports on the photodecomposition of aqueous humic acid (HA) by a TiO(2)-coated ceramic foam filter (TCF) reactor and on the potential for the formation of disinfection byproducts (DBPs) upon chlorination of the photocatalytically treated solutions. This photocatalytic reactor can also be applied to the removal of natural organic matter (NOM) in swamp waters. The proposed photocatalytic reaction system was operated as per standardized methodologies. First, the ability of the TCF to decompose HA (a representative compound of NOM) was evaluated from the changes in the total organic carbon (TOC) and UV(254) with the reaction time. Remarkably, TOC removal and UV(254) values ranging from 44% to 61% and from 60% to 83%, respectively, were achieved. The potential for the formation of DBPs (total trihalomethane and total haloacetic acid) by chlorination of the phototreated solution was strongly dependent on the TOC removal and UV(254) values in the solution. The degree of photodecomposition of NOMs in the swamp water samples and the DBP formation potential showed similar trends as in the case of the standard solutions containing HA. The method used in this study could be effectively used to evaluate the efficiency of TCF for reducing HA and NOM, while suppressing the formation of DBP products.
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Affiliation(s)
- Masanobu Mori
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
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Mori M, Ikeda T, Itabashi H. Effect of perfluorinated surfactant as additive of background electrolyte for capillary electrophoresis of inorganic cations. ACTA CHROMATOGR 2012. [DOI: 10.1556/achrom.24.2012.4.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Murakami N, Takeshita E, Oto Y, Itabashi H, Shiraishi M, Kudo K, Nagai T. G.P.47 Congenital generalized lipodystrophy type 4 with muscular dystrophy: Clinical manifestations in early childhood. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mori M, Hironaga T, Itabashi H, Nakatani N, Kozaki D, Tanaka K. Simultaneous determination of NH4+, NO2(-) and NO3(-) by ion-exclusion/anion-exchange chromatography on a strongly basic anion-exchange resin with basic eluent. Se Pu 2012; 30:356-360. [PMID: 22799190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
Ion-exclusion/anion-exchange chromatography (IEC/AEC) on a combination of a strongly basic anion-exchange resin in the OH(-)-form with basic eluent has been developed. The separation mechanism is based on the ion-exclusion/penetration effect for cations and the anion-exchange effect for anions to anion-exchange resin phase. This system is useful for simultaneous separation and determination of ammonium ion (NH4+), nitrite ion (NO2(-)), and nitrate ion (NO3(-)) in water samples. The resolution of analyte ions can be manipulated by changing the concentration of base in eluent on a polystyrene-divinylbenzene based strongly basic anion-exchange resin column. In this study, several separation columns, which consisted of different particle sizes, different functional groups and different anion-exchange capacities, were compared. As the results, the separation column with the smaller anion-exchange capacity (TSKgel Super IC-Anion) showed well-resolved separation of cations and anions. In the optimization of the basic eluent, lithium hydroxide (LiOH) was used as the eluent and the optimal concentration was concluded to be 2 mmol/L, considering the resolution of analyte ions and the whole retention times. In the optimal conditions, the relative standard deviations of the peak areas and the retention times of NH4+, NO2(-), and NO3(-) ranged 1.28% - 3.57% and 0.54% - 1.55%, respectively. The limits of detection at signal-to-noise of 3 were 4.10 micromol/L for NH4+, 1.87 micromol/L for NO2(-) and 2.83 micromol/L for NO3(-).
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Affiliation(s)
- Masanobu Mori
- Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan.
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Arai K, Mori M, Hironaga T, Itabashi H, Tanaka K. Ion chromatographic separation of inorganic ions using a combination of hydrophilic interaction chromatographic column and cation-exchange resin column. Se Pu 2012; 30:404-408. [PMID: 22799200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
A combination of hydrophilic interaction chromatographic (HILIC) column and a weakly acidic cation-exchange resin (WCX) column was used for simultaneous separation of inorganic anions and cations by ion chromatography (IC). Firstly, the capability of HILIC column for the separation of analyte ions was evaluated under acidic eluent conditions. The columns used were SeQuant ZIC-HILIC (ZIC-HILIC) with a sulfobetaine-zwitterion stationary phase (ZIC-HILIC) and Acclaim HILIC-10 with a diol stationary phase (HILIC-10). When using tartaric acid as the eluent, the HILIC columns indicated strong retentions for anions, based on ion-pair interaction. Especially, HILIC-10 could strongly retain anions compared with ZIC-HILIC. The selectivity for analyte anions of HILIC-10 with 5 mmol/L tartaric acid eluent was in the order of I(-) > NO3(-) > Br(-) > Cl(-) > H2PO4(-). However, since HILIC-10 could not separate analyte cations, a WCX column (TSKgel Super IC-A/C) was connected after the HILIC column in series. The combination column system of HILIC and WCX columns could successfully separate ten ions (Na+, NH4+, K+, Mg2+, Ca2+, H2PO4(-), Cl(-), Br(-), NO3(-) and I(-)) with elution of 4 mmol/L tartaric acid plus 8 mmol/L 18-crown-6. The relative standard deviations (RSDs) of analyte ions by the system were in the ranges of 0.02% - 0.05% in retention times and 0.18% - 5.3% in peak areas through three-time successive injections. The limits of detection at signal-to-noise ratio of 3 were 0.24 - 0.30 micromol/L for the cations and 0.31 - 1.2 micromol/L for the anions. This system was applied for the simultaneous determination of the cations and the anions in a vegetable juice sample with satisfactory results.
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Affiliation(s)
- Kaori Arai
- Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan
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Mori M, Kaseda M, Yamamoto T, Yamada S, Itabashi H. Capillary ion electrophoresis–capacitively coupled contactless conductivity detection of inorganic cations in human saliva on a polyvinyl alcohol-coated capillary. Anal Bioanal Chem 2012; 402:2425-30. [DOI: 10.1007/s00216-011-5688-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 12/08/2011] [Accepted: 12/20/2011] [Indexed: 11/30/2022]
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Jeong J, Lee J, Simizu Y, Tazaki H, Itabashi H, Kimura N. Effects of the Fusarium mycotoxin deoxynivalenol on in vitro rumen fermentation. Anim Feed Sci Technol 2010. [DOI: 10.1016/j.anifeedsci.2010.09.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Aoki N, Furukawa S, Sato K, Kurokawa Y, Kanda S, Takahashi Y, Mitsuzumi H, Itabashi H. Supplementation of the diet of dairy cows with trehalose results in milk with low lipid peroxide and high antioxidant content. J Dairy Sci 2010; 93:4189-95. [DOI: 10.3168/jds.2009-2961] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Accepted: 04/26/2010] [Indexed: 11/19/2022]
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Mori M, Itabashi H, Tanaka K. Utilization of Ion-Exclusion Chromatography for the Quality Test of Water Purifications of Photocatalytic Environmental Materials. BUNSEKI KAGAKU 2010. [DOI: 10.2116/bunsekikagaku.59.565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Masanobu Mori
- Department of Chemistry and Chemical Biology, Graduation School of Engineering, Gunma University
| | - Hideyuki Itabashi
- Department of Chemistry and Chemical Biology, Graduation School of Engineering, Gunma University
| | - Kazuhiko Tanaka
- Division of Development Science, Graduate School for International Development and Cooperation, Hiroshima University
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Nakano K, Sato M, Tsuda A, Sekiya H, Mori M, Itabashi H. Speciation Analysis for Heavy Metals in Sediments at Kusaki Dam-Lake with Sequential Extraction Procedure. BUNSEKI KAGAKU 2010. [DOI: 10.2116/bunsekikagaku.59.829] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Koji Nakano
- Graduate School of Engineering, Gunma University
| | | | - Ayako Tsuda
- Graduate School of Engineering, Gunma University
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Aizawa S, Tsunoda A, Yasuda M, Tsunoda KI, Itabashi H. Concentrations of Heavy Metals in Caddisfly Larvae of the Tone River System and Their Seasonal Variations. BUNSEKI KAGAKU 2009. [DOI: 10.2116/bunsekikagaku.58.273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Shoichi Aizawa
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University
| | - Atsuko Tsunoda
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University
| | | | - Kin-ichi Tsunoda
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University
| | - Hideyuki Itabashi
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University
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Mori M, Tanaka K, Satori T, Ikedo M, Hu W, Itabashi H. Influence of acidic eluent for retention behaviors of common anions and cations by ion-exclusion/cation-exchange chromatography on a weakly acidic cation-exchange resin in the H+-form. J Chromatogr A 2006; 1118:51-5. [PMID: 16546200 DOI: 10.1016/j.chroma.2006.02.083] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2005] [Revised: 02/25/2006] [Accepted: 02/27/2006] [Indexed: 11/21/2022]
Abstract
Influence of acidic eluent on retention behaviors of common anions and cations by ion-exclusion/cation-exchange chromatography (ion-exclusion/CEC) were investigated on a weakly acidic cation-exchange resin in the H(+)-form with conductivity. Sensitivities of analyte ions, especially weak acid anions (F(-) and HCOO(-)), were affected with degree of background conductivity level with pK(a1) (first dissociation constant) of acid in eluent. The retention behaviors of anions and cations were related to that of elution dip induced after eluting acid to separation column and injecting analyte sample. These results were largely dependent on the natures of acid as eluent. Through this study, succinic acid as the eluent was suitable for simultaneous separation of strong acid anions (SO(4)(2-), Cl(-), NO(3)(-) and I(-)), weak acid anions (F(-), HCOO(-) and CH(3)COO(-)), and cations (Na(+), K(+), NH(4)(+), Mg(2+) and Ca(2+)). The separation was achieved in 20 min under the optimum eluent condition, 20 mM succinic acid/2 mM 18-crown-6. Detection limits at S/N=3 ranged from 0.10 to 0.51 microM for strong acid anions, 0.20 to 5.04 microM for weak acid anions and 0.75 to 1.72 microM for cations. The relative standard deviations of peak areas in the repeated chromatographic runs (n=10) were in the range of 1.1-2.9% for anions and 1.8-4.5% for cations. This method was successfully applied to hot spring water containing strong acid anions, weak acid anions and cations, with satisfactory results.
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Affiliation(s)
- Masanobu Mori
- Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan.
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Mori M, Itabashi H, Helaleh MIH, Kaczmarski K, Głód B, Kowalska T, Xu Q, Ikedo M, Hu W, Tanaka K. Vacancy ion-exclusion chromatography of inorganic acids on a weakly acidic cation-exchange resin column. J Chromatogr A 2006; 1118:41-5. [PMID: 16472541 DOI: 10.1016/j.chroma.2006.01.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2005] [Revised: 01/05/2006] [Accepted: 01/09/2006] [Indexed: 10/25/2022]
Abstract
Vacancy ion-exclusion chromatography (VIEC) for inorganic acids such as H(2)SO(4), HCl, H(3)PO(4), HNO(3), HI and HF is tested on a polymethacrylate-based weakly acidic cation-exchange resin column in the H(+)-form. That is, mixture of inorganic acids in the mobile phase is adsorbed to the resin phase passing through the separation column, and each vacant peak induced by injecting water is determined. Retention times are dependent on the degrees of retention for each analyte in the resin phase. In VIEC, well-shaped peaks of inorganic acids are produced, leading to efficient separations. However, retention behaviors of inorganic acids were strongly affected by the concentrations of the acids in the mobile phase. Sulfosalicylic acid was mixed with inorganic acids in the mobile phase prior to the introduction of a separation column in order to obtain the well-resolutions in the lower concentrations of the acids. By using this method, the separations of inorganic acids could be achieved in the range of 0.01-1 mM, and the linear ranges could be extended over two-orders of magnitude. This is considered since the protonated carboxylic groups fixed on the resin phase were increased with increasing the acid concentrations in the mobile phase, and the penetration effects for the acids to the resin phase were thus enhanced. The detection limits (S/N=3) were below 1.0 microM for all analyte acids. Precision values for retention times were below 0.32% and for peak area were below 0.91%.
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Affiliation(s)
- Masanobu Mori
- Faculty of Engineering, Gunma University, Kiryu, Gunma, Japan.
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Mori M, Itabashi H, Ikedo M, Tanaka K. Ion-exclusion chromatography with the direct UV detection of non-absorbing inorganic cations using an anion-exchange conversion column in the iodide-form. Talanta 2006; 70:174-7. [PMID: 18970747 DOI: 10.1016/j.talanta.2006.01.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2005] [Revised: 01/10/2006] [Accepted: 01/30/2006] [Indexed: 10/24/2022]
Abstract
An ion-exclusion chromatographic method for the direct UV detection of non-absorbing inorganic cations such as sodium (Na(+)), ammonium (NH(4)(+)) and hydrazine (N(2)H(5)(+)) ions was developed by connecting an anion-exchange column in the I(-)-form after the separation column. For example, NH(4)(+) is converted to a UV-absorbing molecule, NH(4)I, by the anion-exchange column in the I(-)-form after the ion-exclusion separation on anion-exchange column in the OH(-)-form with water eluent. As a result, the direct UV detection of Na(+), NH(4)(+) and N(2)H(5)(+) could be successfully obtained as well as the well-resolved separation. The calibration graphs of the analyte cations detected with UV at 230nm were linear in the range of 0.001-5.0mM. The detection limits at S/N=3 of the cations were below 0.1muM. This method was applied to real water analysis, the determination of NH(4)(+) in river and rain waters, or that of N(2)H(5)(+) in boiler water, with the satisfactory results. This could be applied also to low- or non-absorbing anions such as fluoride or hydrogencarbonate ions by the combination of a weakly acidic cation-exchange resin in the H(+)-form as the separation column and the anion-exchange conversion column.
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Affiliation(s)
- Masanobu Mori
- Faculty of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
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Mori M, Ikedo M, Hu W, Helaleh MIH, Xu Q, Itabashi H, Tanaka K. High-speed ion-exclusion chromatography of dissolved carbon dioxide on a small weakly acidic cation-exchange resin column with ion-exchange enhancement columns of conductivity detection. J Chromatogr A 2005; 1092:250-3. [PMID: 16199234 DOI: 10.1016/j.chroma.2005.08.060] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2004] [Revised: 08/16/2005] [Accepted: 08/18/2005] [Indexed: 10/25/2022]
Abstract
The high-speed ion-exclusion chromatographic determination of dissolved carbon dioxide, i.e., carbonic acid, hydrogencarbonate or carbonate, with conductivity detection was obtained using a small column packed with a weakly acidic cation-exchange resin in the H+-form (40 mm long x 4.6 mm i.d., 3 microm-particle and 0.1 meq./ml-capacity). Two different ion-exchange resin columns, which were a strongly acidic cation-exchange resin in the K+-form and a strongly basic anion-exchange resin in the OH- -form, were connected after the separation column. The sequence of columns could convert dissolved carbon dioxide to KOH having high conductivity response. The enhancement effect for dissolved carbon dioxide could retain even on the vast chromatographic runs, by using the enhancement columns with high ion-exchange capacity above 1.0 meq./ml. The retention time was in 60 s at flow-rate of 1.2 ml/min. The calibration graph of dissolved carbon dioxide estimated as H2CO3- was linear in the range of 0.005-10 mM. The detection limit at signal to noise of 3 was 0.15 microM as H2CO3-. This method was applicable to several rainwater and tap water samples.
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Affiliation(s)
- Masanobu Mori
- Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, Japan.
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Lila ZA, Mohammed N, Yasui T, Kurokawa Y, Kanda S, Itabashi H. Effects of a twin strain of saccharomyces cerevisiae live cells on mixed ruminal microorganism fermentation in vitro. J Anim Sci 2005; 82:1847-54. [PMID: 15217013 DOI: 10.2527/2004.8261847x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This experiment was designed to investigate the effects of different concentrations (0, 0.33, 0.66, 0.99, and 1.32 g/L) of a twin-strain of Saccharomyces cerevisiae live cells on in vitro mixed ruminal microorganism fermentation of corn starch, soluble potato starch, and sudangrass hay (60.5%, DM basis) plus concentrate mixture (39.5%, DM basis). Ruminal fluid was collected from two dairy cows, mixed with phosphate buffer (1:2), and incubated (30 mL) anaerobically at 38 degrees C for 6 and 24 h with or without yeast supplement, using 200 mg (DM basis) of each substrate. Medium pH, ammonia-N, and numbers of protozoa were unaffected (P = 0.38) by yeast cells in all substrates. Molar proportion of acetate was unchanged (P = 0.56) with cornstarch and soluble potato starch, but increased quadratically (P = 0.02) with hay plus concentrate by treatment. Addition of yeast cells caused a linear increase of total VFA (P = 0.008) in all substrates. Excluding the soluble potato starch, supplementation of S. cerevisiae resulted in a quadratic increase of propionate (P = 0.01), with a quadratic decrease (P = 0.04) of acetate:propionate. When soluble potato starch was used as a substrate, a linear increase (P = 0.006) of the molar proportion of propionate and a quadratic decrease (P = 0.007) in acetate:propionate was observed by treatment. Molar proportion of butyrate was unchanged (P = 0.35) with cornstarch and soluble potato starch, whereas it decreased linearly (P = 0.007) with hay plus concentrate by yeast cell supplementation. When cornstarch and soluble potato starch were used as a substrate, minor VFA were decreased (P = 0.05) by treatment. Accumulation of lactate was linearly decreased by treatment (P = 0.007) in all substrates. During incubation with hay plus concentrate, IVDMD was linearly increased (P = 0.006), whereas production of methane (linear; P = 0.02) and accumulation of hydrogen was decreased (quadratic; P = 0.005) by treatment after 24 h. These results showed that a twin strain of S. cerevisiae live cells stimulated in vitro mixed ruminal microorganism fermentation with decreased lactate, and a small decrease of methane and hydrogen with hay plus concentrate.
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Affiliation(s)
- Z A Lila
- Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
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Tatsuoka N, Mohammed N, Mitsumori M, Hara K, Kurihara M, Itabashi H. Phylogenetic analysis of methyl coenzyme-M reductase detected from the bovine rumen. Lett Appl Microbiol 2004; 39:257-60. [PMID: 15287871 DOI: 10.1111/j.1472-765x.2004.01566.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
AIMS The object of the present study is isolation of methyl coenzyme-M reductase (MCR) genes (mcrA) from the bovine rumen fluid and determination of phylogenetical placements of the genes to investigate mechanisms of methanogenesis in the rumen from a point of view of mcrA genes. METHODS Genes for methanogen-specific MCR were isolated from the bovine rumen by PCR amplification. The deduced amino acid sequences were fitted to the alignments of mcrA gene products from the referred sequences. SIGNIFICANCE AND IMPACT OF THE STUDY Although the deduced amino acid sequences of mcrA genes, isolated from the bovine rumen in the present study, were close to that of Methanobrevibacter ruminantium, these amino acid sequences did not fall into known clusters of MCR. The findings suggest that methanogenesis in the rumen would be partially carried out by unknown methanogens.
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Affiliation(s)
- N Tatsuoka
- Bio Research Corporation of Yokohama, Kanagawa, Japan
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Mohammed N, Ajisaka N, Lila ZA, Hara K, Mikuni K, Hara K, Kanda S, Itabashi H. Effect of Japanese horseradish oil on methane production and ruminal fermentation in vitro and in steers1. J Anim Sci 2004; 82:1839-46. [PMID: 15217012 DOI: 10.2527/2004.8261839x] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The effects of alpha-cyclodextrin-horseradish oil complex (CD-HR) on methane production and ruminal fermentation were studied in vitro and in steers. In the in vitro study, diluted ruminal fluid (30 mL) was incubated anaerobically at 38 degrees C for 6 h with or without CD-HR, using cornstarch as substrate. The CD-HR was added at various concentrations (0, 0.17, 0.85 and 1.7 g/L). Treatment affected neither the pH of the medium nor the number of protozoa. Total VFA increased in a linear manner (P = 0.02), and NH3-N decreased quadratically (P = 0.04) as the concentration of CD-HR increased from 0.17 g/L to 1.7 g/L. Molar proportions of acetate decreased in a linear manner (P = 0.03), and propionate increased linearly (P = 0.008) with increasing concentrations of CD-HR. Production of methane was inhibited up to 90%, whereas accumulation of dihydrogen was increased 36-fold by 1.7 g/L of CD-HR supplementation relative to controls. The effect of CD-HR on methane production, ruminal fermentation and microbes, and digestibility was further investigated in vivo using four Holstein steers in a crossover design. The CD-HR supplement was mixed into the concentrate portion of a (1.5:1) Sudangrass hay plus concentrate mixture that was fed twice daily to the steers. Ruminal samples were collected 0, 2, and 5 h after the morning feeding. No effects of CD-HR supplementation on ruminal pH (P = 0.63) or protozoal numbers (P = 0.44) were observed. Molar proportion of acetate was decreased (P = 0.04) and propionate was increased (P = 0.005) by CD-HR treatment. Molar proportion of butyrate was increased (P = 0.05) in CD-HR-supplemented steers. Ruminal NH3-N was decreased (P = 0.05) by treatment. Blood plasma glucose concentration was increased (P = 0.02) and urea-N was decreased (P = 0.04) with CD-HR supplementation. Daily DMI was decreased (P = 0.04), and apparent digestibility of DM (P = 0.13), NDF (P = 0.14), and CP tended (P = 0.14) to be increased by treatment. Methane production was decreased (P = 0.03) by 19%, and the number of methanogens was also decreased (P = 0.03). Although N retention (P = 0.11), total viable bacteria (P = 0.15), and sulfate-reducing bacteria (P = 0.17) were not significantly altered by treatment, tendencies for increases were noted with CD-HR supplementation. The number of cellulolytic (P = 0.38) and acetogenic bacteria (P = 0.32) remained unchanged by treatment. These results indicate that CD-HR supplementation can be used to decrease methane production in steers.
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Affiliation(s)
- N Mohammed
- Bioresearch Corporation of Yokohama, Yokohama 230-0004, Japan
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Mohammed N, Lila ZA, Ajisaka N, Hara K, Mikuni K, Hara K, Kanda S, Itabashi H. Inhibition of ruminal microbial methane production by beta-cyclodextrin iodopropane, malate and their combination in vitro. J Anim Physiol Anim Nutr (Berl) 2004; 88:188-95. [PMID: 15189423 DOI: 10.1111/j.1439-0396.2004.00456.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The objective of this study was to evaluate the effects of different concentrations of l-malate (0, 5, 10 and 20 mm), 2-iodopropane-beta-cyclodextrin complex (CD-IP) (0, 0.1, 0.2 and 0.4 mm) and a combination of malate (10 and 20 mm) plus CD-IP (0.2 and 0.4 mm) on methane production from corn starch. Ruminal fluid was collected from dairy cows, mixed with phosphate buffer (1 : 2) and incubated (30 ml) anaerobically at 38 degrees C for 6 h with or without additives. Fermentation of corn starch in the presence of malate resulted in an increase (p < 0.05) in pH of the medium, total volatile fatty acid (VFA), total gas production and molar proportion of propionate. Acetate and ammonia-N concentration were unchanged. Methane production was decreased (p < 0.05) (15.5 to 20.4%). Addition of CD-IP in corn starch resulted in an increase (p < 0.05) in total VFA and molar proportion of propionate. Acetate, pH and ammonia-N concentration of the medium were decreased (p < 0.05). Total gas production was unchanged. Methane production was decreased (p < 0.05) (25.2 to 97.1%) and hydrogen production was increased (p < 0.05). Addition of l-malate to CD-IP resulted in an increase (p < 0.05) in total VFA, total gas production and molar proportion of propionate. Acetate and ammonia-N concentration were decreased (p < 0.05). No effects were observed on medium pH. Methane production was decreased (p < 0.05) (49.5 to 97.1%). Hydrogen production was also decreased (p < 0.05) (54.5 to 64.1%) compared with those of CD-IP alone. Therefore, these additives may be used as supplements to inhibit methane production as well as to improve rumen fermentation and animal performance.
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Affiliation(s)
- N Mohammed
- Bio Research Corporation of Yokohama, Fukuura, Kanazawa-ku, Yokohama, Japan
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Abstract
This experiment was designed to investigate the effects of different concentrations (0, 1.2, 1.8, 2.4, and 3.2 g/L) of sarsaponin on ruminal microbial methane production using the substrates soluble potato starch, cornstarch, or hay plus concentrate (1.5:1). Ruminal fluid was collected from a dairy cow, mixed with phosphate buffer (1:2) and incubated (30 ml) anaerobically at 38 degrees C for 6 and 24 h with or without sarsaponin. Excluding the lower level of sarsaponin, pH of the medium was slightly decreased. Ammonia-N concentration and numbers of protozoa were decreased in a dose-dependent manner. Total volatile fatty acids and total gas production were increased. Molar proportion of acetate was decreased and propionate was increased with a corresponding decrease in acetate:propionate ratio. Hydrogen production was decreased. As the concentration of sarsaponin increased from 1.2 to 3.2 g/L, fermentation of soluble potato starch, cornstarch, or hay plus concentrate decreased methane production from 20 to 60% (6 h) and 17 to 50% (24 h), 21 to 58% (6 h) and 18 to 52% (24 h), and 23 to 53% (6 h) and 15 to 44% (24 h), respectively. Excluding the lower dose concentration (1.2 g/L) of sarsaponin, in vitro disappearance of dry matter of hay plus concentrate was decreased after 24 h. In conclusion, these results show that sarsaponin stimulated the mixed ruminal microorganism fermentation as well as to inhibit methane production in vitro.
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Affiliation(s)
- Z A Lila
- Laboratory of Agricultural Production Technology, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
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49
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Itabashi H, Kamata Y, Kawaguchi D, Kawamoto H. Evaluation of the copper(II) complexing ability of ultrafiltered humic acid by the solvent extraction method. ANAL SCI 2003; 19:1277-80. [PMID: 14516079 DOI: 10.2116/analsci.19.1277] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A commercial humic acid dissolved in water was fractionated to nine samples by means of ultrafiltration (UF); the nominal molecular weight used for UF membranes was 1 k-200 kDa. Concerning the nine samples, copper(II) complexing capacities (CuCC) and conditional stability constants (beta) of the formed copper(II) complexes were measured by a solvent extraction method. A total organic carbon (TOC) and the UV-VIS absorption ratio (E350 nm/E450 nm) were also measured. From a comparison of these data, it was found that a) humic acids in each fraction formed two kinds of copper(II) complexes with different stability; b) the beta values obtained from each fraction were almost the same; c) large CuCC values were observed in the molecular weight range from 10 kDa to 20 kDa and below 1 kDa; d) molecules with molecular weight higher than 50 kDa scarcely had any copper(II) complexing ability; e) the values of CuCC/TOC of each fraction were in the range from 1.7 to 3.4 x 10(-7) mol mg(-1).
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Affiliation(s)
- Hideyuki Itabashi
- Department of Applied Chemistry, Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan
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50
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Itabashi H, Yoshida M, Kawamoto H. Kinetically controlled separation of cadmium(II) from zinc(II) with dithizone in the presence of nitrilotriacetic acid. ANAL SCI 2001; 17:1301-4. [PMID: 11759513 DOI: 10.2116/analsci.17.1301] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The extraction rates of cadmium(II) and zinc(II) with dithizone (H2dz) in the presence of nitrilotriacetic acid (NTA) were measured, and the possible kinetic separation of cadmium(II) from zinc(II) was investigated. Upon the addition of NTA, the difference in the extraction rate between cadmium(II) and zinc(II) became large. Based on the observed rate constant under the condition [NTA] = 1 x 10(-2) mol dm-3, [H2dz]org = 1 x 10(-3) mol dm-3, and pH = 7.0, the shaking time required for the quantitative separation of cadmium(II) from zinc(II) was calculated to be between 326 and 995 s. The experimental results agreed with the prediction, and the quantitative separation of cadmium(II) from zinc(II) was performed within the above-mentioned range of shaking times.
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Affiliation(s)
- H Itabashi
- Department of Applied Chemistry, Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan
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