OHTANI Hajime

写真a

Affiliation Department etc.

Department of Life Science and Applied Chemistry
Department of Life Science and Applied Chemistry

Title

Professor

Mail Address

E-mail address

Degree

  • Nagoya University -  Doctor of Engineering

External Career

  • 1998.04
    -
    2005.03

    Associate Professor, Graduate School of Engineering, Nagoya University   Associate Professor (as old post name)  

  • 1995.04
    -
    1998.03

    Associate Professor, Center for Integrated Research in Science and Engineering   Associate Professor (as old post name)  

  • 1986.07
    -
    1995.03

    Assistant Professor, School of Engineering, Nagoya University   Research Assistant  

Academic Society Affiliations

  • 2014.03
    -
    Now

    The Society of Rubber Science and Technology, Japan

  • 2012.10
    -
    Now

    Tha Mass Specttrometry Society of Japan

  • 2002.06
    -
    Now

    American Chemical Society

  • 1998.04
    -
    Now

    Materials Life Society, Japan

  • 1992.05
    -
    Now

    The Japan Scientist Association

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Field of expertise (Grants-in-aid for Scientific Research classification)

  • Polymer chemistry

  • Analytical chemistry

 

Research Career

  • Study on Degradation and Modification of Polymeric Materials

    Collaboration in Japan   (not selected)  

    Project Year:  1986.01  -  Now

  • Basis and Application of Pyrolysis-Gas Chromatography

    International Collaboration   (not selected)  

    Project Year:  1980.04  -  Now

  • Structural Characterization of Polymers

    International Collaboration   (not selected)  

    Project Year:  1980.04  -  Now

Papers

  • Retention in high-performance liquid chromatography at -196ºC

    Tomohiro Motono, Shinya Kitagawa, Hajime Ohtani

    Journal of Chromatography A ( Elsevier )  1503   32 - 37   2017.06  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    Recently, we have developed ultralow-temperature high-performance liquid chromatography (HPLC) at −196 °C using liquid nitrogen-based mobile phases. In this study, a retention model for ultralow-temperature HPLC, in which adsorption exchange and “pseudo partition” modes are combined, is proposed to describe the effect of the mobile phase composition on the retention of analytes. The experimental results agreed well with the equation of the proposed model. It was revealed that, in the low and high additive concentration regions, adsorption exchange and pseudo partition retention, respectively, dominate the analyte retention. The difference in the retention behavior between bare-silica and octadecylsilyl-modified silica (ODS) columns was also studied. Retention of alkanes in the ODS column was greater than that in the bare-silica one. Addition of both ethane and ethylene to the mobile phase in the ODS column afforded the elution of propylene, which was not eluted with the bare-silica column at −196 °C.

  • Effect of column structure on separation efficiency in low-temperature HPLC using pure liquid carbon dioxide as the mobile phase

    Mina Otsubo, Tomohiro Motono, Shinya Kitagawa, Hajime Ohtani

    Chromatography ( クロマトグラフィー科学会 )  38 ( 1 ) 31 - 37   2017.03  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    The effect of column structure and chromatographic conditions (flow rate, inlet pressure, and temperature) on separation behavior in low-temperature HPLC using pure liquid CO2 mobile phase was investigated. Three types of packed columns (fully porous, small nonporous, and core-shell particles) and a monolithic column (fully porous) were used. The effect of temperature (-5 to -30°C), inlet pressure (5.3 or 6.3 MPa), and flow rate (1 or 2 mm/s) on chromatographic behavior was evaluated. The retention factors of the analytes (naphthalene, anthracene, and pyrene) were not affected by either inlet pressure or flow rate. Although the column temperature somewhat affected the separation efficiency, the typical relationship between temperature and separation efficiency was not observed. On the other hand, both inlet pressure and flow velocity affected the separation efficiency. In this study, the highest separation efficiency was achieved in the core-shell column with a flow rate of 1 mm/s and inlet pressure of 6.3 MPa. The best separation efficiency under this condition was 12 m in theoretical plate height (85 000 N/m) for pyrene at -30°C. In addition, the supplied liquid CO2 was found to solidify in the column at low temperatures and its behavior also depends on both the chromatographic conditions (particularly for flow rate) and the column structure. The typical relationship between solidification and chromatographic behavior was not observed clearly.

  • End group analysis of styrene-butyl acrylate copolymers initiatedwith benzoyl peroxide by stepwise chemolysis-pyrolysis gas chromatography

    Hajime Ohtani, Kaoru Takeuchi, Yoshinori Iiguni, Asako Kaneko, Masaaki Kiura, Hikaru Momose

    Journal of Analytical and Applied Pyrolysis ( Elsevier )  124   677 - 681   2017.03  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    End groups in a series of styrene (St)-butyl acrylate (BA) copolymer samples (St:BA, 80:20 molar feed ratio) prepared through radical polymerization with various amounts (1.5–10 wt%) of benzoyl peroxide (BPO) as an initiator were characterized. Two types of end groups originated from the BPO initiator—benzoyloxy and phenyl terminal groups—were individually determined by stepwise chemolysis-pyrolysis gas chromatography (Py-GC) using a double-shot furnace pyrolyzer. In the first (chemolysis) step, the copolymer sample was mixed with tetramethylammonium hydroxide and introduced into the pyrolyzer at 250 °C for 10 min. During this step, the benzoyloxy terminal groups were selectively and quantitatively decomposed into methyl benzoate through the thermally assisted hydrolysis and methylation of ester linkages, which was clearly observed in the pyrogram. In the second step, the residual polymer sample was analyzed by ordinary Py-GC at 600 °C. In the observed pyrogram, benzene and C14H12 were separately detected as the key products reflecting the phenyl terminal groups among the various pyrolyzates of the polymer main chain. Based on the peak intensities of these characteristic products, the relative contents of both types of the end groups from BPO were estimated to be almost proportional to the feed amounts of BPO. Moreover, it was determined that the number of benzoyloxy end groups was roughly twice of that of the phenyl terminal groups.

  • Characterization of the cross-linking structures in UV- and EB-cured acrylic copolymer resins using high resolution MALDI-spiral-TOFMS combined with supercritical methanolysis

    Makoto Miyazawa, Yoshinori Iiguni, Hajime Ohtani

    Polymer Chemistry ( Royal Society of Chemistry )  8 ( 7 ) 1155 - 1162   2017.02  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    The cross-linking structures of ultraviolet (UV) and electron beam (EB)-cured acrylic copolymer resins prepared with pentaerythritol triacrylate and 1-vinyl-2-pyrrolidone (VP) mixtures were characterized using high resolution matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOFMS) combined with supercritical methanolysis. Methyl acrylate (MA)/VP co-oligomers were formed via methanolysis through selective cleavage and methylation at the ester linkages in the radiation-cured resins, which reflected the cross-linking junctions. Almost all of the products were completely separated in the high-resolution spiral TOFMS spectra, including the isotope peaks for a slight mass difference of Δm/z ≃ 0.05. Two types of the copolymeric methanolysis products with different terminal structures were identified for up to 11-mers at approximately m/z 1300 on the MALDI mass spectra. The distributions of the products observed in the mass spectra were interpreted in terms of the original structures of the cured resin samples to reflect the curing reactions.

  • Development of Field-flow Orthogonal Electrochromatography

    Hiroaki MEKATA, Shinya KITAGAWA, Yoshinori IIGUNI, Hajime OHTANI

    Bunseki Kagaku ( The Japan Society for Analytical Chemistry )  65 ( 12 ) 737 - 744   2016.12  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    A novel separation method that combines liquid chromatography and electrophoresis in a field of heterogeneous flow velocity, named as field-flow orthogonal electrochromatography (FFOEC), is proposed. In the theory of FFOEC, the difference in the orthogonal electrochromatographic migration velocity of analytes in a planer stationary phase with pressurized flow of controlled-heterogeneous velocity can enhance the analytes separation in the flow direction as a similar manner of field-flow fractionation (FFF). Since the essence of FFOEC is a one-directional separation, the parallel detection system is not indispensable, akin to a conventional HPLC, even though a planer stationary phase is used. The polymer monolithic layer with a heterogeneous monolith density to control the flow velocity was prepared using a modulation of irradiation intensity in photo-initiated polymerization. In FFOEC using the heterogeneous density polymer monolith layer, the separation efficiency of the analytes was successfully enhanced with an increase in the applied voltage due to orthogonal electrophoresis.

  • Development of a multi-sample micro UV irradiator for accelerated deterioration of polymers

    Kazuko Matsui, Akihiko Hosaka, Atsushi Watanabe, Norio Teramae, Hajime Ohtani

    Polymer Testing ( Elsevier )  56   54 - 57   2016.12  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    The authors previously developed a pyrolysis-gas chromatograph/mass spectrometry (Py-GC/MS) system incorporating a micro ultraviolet (UV) irradiator which allowed more rapid deterioration of polymeric materials compared to outdoor exposure tests and various accelerated weathering test methods such as weather meters. The micro UV irradiator, however, could handle only a single sample at a time. To achieve multi-sample deterioration in a short time, herein a new UV irradiator was developed by which up to 18 samples on a rotatable sample cup holder can be simultaneously deteriorated at a desired temperature under UV irradiation. The basic performance of the irradiator is evaluated in terms of the rate and reproducibility of accelerated deterioration by using high impact polystyrene (HIPS) as the test sample. The HIPS samples before and after deterioration are subjected to evolved gas analysis-mass spectrometry (EGA-MS) focusing on the changes in the peak width observed in the thermograms. High precision in the peak width measurements among the samples irradiated at various positions on the rotatable sample cup holder is observed with RSD values less than 4.3%. The newly developed irradiator for multi-samples requires a six times longer period to accomplish a comparable deterioration level than the previously developed irradiator. This lengthening can be attributed to the difference in the light intensities of both irradiators at the sample position. However, the relationship between the peak width and the irradiation time has similar profiles for both irradiators. This similarity indicates a good correlation of data measured by both irradiators.

  • Morphology-Controlled Synthesis of Hexagonal Boron Nitride Crystals by Chemical Vapor Deposition

    Subash Sharma, Kamal Sharma, Mohamad Saufi Rosmi, Yazid Yaakob, Mona Ibrahim Araby, Hajime Ohtani, Golap Kalita, Masaki Tanemura

    Crystal Growth & Design ( American Chemical Society )  16 ( 11 ) 6440 - 6445   2016.11  [Refereed]

    Research paper (scientific journal)   Multiple Authorship


    Synthesis of hexagonal boron nitride (hBN) crystals with a controlled morphology is a major challenge due to various kinetic and thermodynamic factors at the edge. Supplying BN building blocks by heating precursor ammonia borane at a temperature of 90 °C .

    Synthesis of hBN crystals with a controlled morphology is a major challenge due to various kinetic and thermodynamic factors at the edge. Supplying a controlled amount of BN building blocks to synthesize triangular and hexagonal crystals and modulation from hexagons to triangles is a major achievement due to the single parameter control throughout the experiment. Diffusion and edge attachment determine the morphology of hBN during crystal growth.

  • High Performance Liquid Chromatography at −196 °C

    Tomohiro Motono, Shinya Kitagawa, Hajime Ohtani

    Analytical Chemistry ( American Chemical Society )  88 ( 13 ) 6852 - 6858   2016.07  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    Ultralow temperature high-performance liquid chromatography (HPLC) was developed using a liquefied gas as the mobile phase. HPLC separation of low molecular weight alkanes at −196 °C with liquid nitrogen mobile phase was successfully achieved, whereas their GC separation at −196 °C using helium gas mobile phase failed to elute the analytes due to strong adsorption. Prior to the further study of HPLC at −196 °C, the effect of column temperature on the chromatographic behavior was investigated, and it was found that the retention of analytes drastically increased when the column temperature was over the boiling point of the mobile phase. As the study of retention control in HPLC at −196 °C, the mobile phases of nitrogen and methane mixtures were investigated. The addition of methane to the nitrogen mobile phase suppressed the retention of the analytes (tetra-deuterated methane, ethane, and propane), that is, the retention on HPLC at ultralow temperature could be controlled by the mobile phase composition, akin to the typical retention in HPLC. The selectivity toward the n- and iso-alkane in HPLC at −196 °C was altered compared with that in GC separation at room temperature. A significant enhancement of retention of alkanes compared with alkanes were observed in HPLC at −196 °C.

  • Variation in the chromatographic, material, and chemical characteristics of methacrylate-based polymer monoliths during photoinitiated low-temperature polymerization

    Ayumi Kobayashi, Takuya Nakaza, Tomohiko Hirano, Shinya Kitagawa, Hajime Ohtani

    Journal of Separation Science ( Wiley )  39 ( 13 ) 2459 - 2465   2016.07  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    Both the separation behavior and the structure of a polymer monolith column depends on both the reaction solution composition and the polymerization conditions. In photoinitiated low-temperature polymerization, polymerization temperature, irradiation intensity, and polymerization time were key factors to control the monolith characteristics. In this study, the effect of polymerization time on the chromatographic, material, and chemical characteristics of poly(butyl methacrylate-co-ethylene dimethacrylate) monoliths was studied using pyrolysis-gas chromatography, Raman spectroscopy, inverse size exclusion chromatography, scanning electron microscopy, and chromatographic methods. Both butyl methacrylate and ethylene dimethacrylate monomers were incorporated into the monolith as the polymerization time increased, and it resulted in increases in both the flow resistance (decrease in both permeability and total/through pore porosities) and retention factors. The longer polymerization time led to lower relative amounts of free methacrylate functional groups in the monolith, i.e. cross-linking was enhanced. The increase of the polymerization time from 8 to 12 min significantly reduced the separation efficiency for the retained analyte, whereas an increase in the fraction of the mesoporosity was observed.

  • Preliminary Study of Orthogonal Electrochromatography for Simultaneous Two-Dimensional Separation Using a Monolithic Polymer Layer

    Hiroaki ITO, Mika MATSUGI, Shinya KITAGAWA, Hajime OHTANI

    Chromatography ( クロマトグラフィー科学会 )  37 ( 2 ) 73 - 78   2016.06  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    Fabrication of a monolithic polymer layer, as the stationary phase, equipped with two electrodes was studied for simultaneous two-dimensional separation, combining high performance liquid chromatography and orthogonal electrophoresis. The monolithic polymer layer was prepared between a pair of glass plates by a two-step UV-initiated photo-polymerization. Prior to preparation of the monolithic polymer layer for separation, high-density monolith bars were prepared along the electrodes to suppress the penetration of bubbles formed at the electrodes into the separation monolith. Using the monolithic polymer layer, 2D separation of colored-dyes was successfully achieved by combining gradient HPLC and orthogonal electrophoresis. The 2D separation of proteins was also demonstrated.

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Books

  • Pyrolysis-GC/MS Data Book of Synthetic Polymers

    TSUGE Shin, OHTANI Hajime, WATANABE Chuichi (Part: Multiple Authorship )

    Elsevier  2011.10 ISBN: 978-0-444-53892-5

    This data book provides an extensive reference collection of the behavior of specific polymers during pyrolysis. It fills a big gap in the available standards and data on pyrolysis research, as there are no books that give the same combination of excellent analytical data with such a wide range of polymer systems that are useful to so many areas of multidisciplinary research. The data provided will be useful whenever a new polymer has to be analyzed in order to facilitate the identification or to confirm the results. The book also briefly reviews the instrumentation available in advanced analytical pyrolysis and offers guidance to perform this technique, effectively combining gas chromatography and mass spectrometry. Main contents are comprehensive sample pyrograms, thermograms, identification tables, and representative mass spectra (MS) of pyrolyzates for synthetic polymers. This edition also highlights thermally assisted hydrolysis and methylation techniques effectively applied to 33 basic condensation polymers.

  • Recent Trends of LED-UV Curing Technology and Curing Materials, "jointly worked"

    H. Ohtani (Part: Multiple Authorship )

    CMC Publishing  2010.05 ISBN: 978-4-7813-0221-8

  • Introduction to Polymer Analysis, "jointly works"

    H. Ohtani (Part: Multiple Authorship )

    2010.04 ISBN: 978-4-06-154360-7

  • Conservation of Paper and Books

    H. Ohtnai (Part: Multiple Authorship )

    Iwata-shoin  2009.10 ISBN: 978-4-87294-574-4

  • Crosslinking and Degradation of Polymers for Sustainable Chemistry

    H. Ohtani (Part: Multiple Authorship )

    CMC Publishing  2007.07 ISBN: 978-4-88231-693-0

  • The Fifth Series of Experimental Chemistry 20-1 Analytical Chemistry, "jointly worked"

    H. Ohtani (Part: Multiple Authorship )

    Maruzen  2007.01 ISBN: 978-4-621-07319-3

  • Applied Pyrolysis Handbook second edition, "jointly worked"

    H. Ohtani, S. Tsuge (Part: Multiple Authorship ,  4. Microstructure of Polyolefins, pp.65-80; 5. Degradation Mechanism of Condensation Polymers:Polyesters and Polyamides, pp.81-103;11. Characterization of Condensation Polymers by Pyrolysis-GC in the Presence of Organic Alkali, pp.249-269 )

    CRC Press  2007.01 ISBN: 1-57444-641-X

  • Pyrolysis GC/MS of Highpolymers - Fundamentals and Pyrograms -, "jointly worked"

    S. Tsuge, H. Ohtani, C. Watanabe (Part: Multiple Authorship )

    Technosystem  2006.10 ISBN: 4-924728-51-9

  • Analytical Chemistry, 6th edition, "jointry worked"

    H. Ohtani (Part: Joint Translation )

    Maruzen  2005.03 ISBN: 978-4-621-07554-8

  • The Fifth Series of Experimental Chemistry 26 Polymer Chemistry, "jointly worked"

    H. Ohtani (Part: Multiple Authorship )

    Maruzen  2005.03 ISBN: 4-621-07325-7

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Review Papers

  • Rapid Evaluation of The Weatherrability of polymers bu Xenon Lamp-Based Online Ultraviolet Irradiation-Pyrolysis-GC/MS

    Science and Industry   88 ( 1 ) 19 - 27   2014.01

    Introduction and explanation (others)   Multiple Authorship

  • Evaluation of Acidic Paper Deterioration in Library Materials by Pyrolysis-Gas Chromatography

    Hajime Ohtani

    Senri Ethnological Studies ( 国立民族学博物館 )  85   11 - 19   2013.12

    Introduction and explanation (others)   Single Author

    Pyrolysis-gas chromatography (Py-GC) was used to evaluate deteriorated acidic paper in old books. A tiny piece (ca. 0.25 mg) of deteriorated paper from each book was subjected to Py-GC measurement at a 300 °C pyrolysis temperature. Levoglucosan and its dehydrated form levoglucosenone were typical degradation products, whereas primarily only levoglucosan was observed in control samples of undamaged new paper. The relative intensity of levoglucosenone was much higher in samples taken at the heavily deteriorated marginal edge than in those taken from the center of the same page of an old book. Accordingly, levoglucosenone observed in the pyrogram can be used as a marker to evaluate the degree of deterioration of acidic paper. The formation of levoglucosenone can be attributed to the slow deterioration process of paper, in which the dehydration reaction plays an important role, accompanied by the chain scission of cellulose. The Py-GC method for paper evaluation was also applied to clarify the effect of storage conditions on the deterioration of paper materials and to evaluate the long-term deterioration of the British Parliamentary Papers (1801–1986) collected at the Kyoto University Library.

  • Direct Analysis of Stabilizers in Plastic Materials by Pyrolysis-GC and MALDI-MS

      47 ( 10 ) 336 - 344   2012.10

    Introduction and explanation (international conference proceedings)   Single Author

  • Polymer Characterization by Mass Spectrometry

    OHTANI Hajime

    Journal of Network Polymer, Japan ( Japan Thermosetting Plastic Industry Association )  32 ( 4 ) 219 - 227   2011.07

    Introduction and explanation (international conference proceedings)   Single Author

  • Ongoing study on the conservation of paper and books: evaluating paper deterioration and strengthening of deteriorated paper

    H, Sonoda, M. Seki, T. Okayama, H. Ohtani

    International Preservation News ( The International Federation of Library Associations and Institutions )  48   27 - 29   2009.08

    Introduction and explanation (international conference proceedings)   Multiple Authorship

  • Structural Characterization of UV-cured Acrylic Ester Resins by Specific Sample Decomposition

    H. Ohtani

    Journal of Network Polymer, Japan ( Japan Thermosetting Plastics Industry Association )  30 ( 1 ) 23 - 32   2009.02

    Introduction and explanation (international conference proceedings)   Single Author

Presentations

  • Extraction of Rubbery Material from Plant Produced Emulsion by use of Ionic Liquids

    Yoshiaki Takahashi, Keiko Nakasone, Sou Satou, Hajime Ohtani, Atsushi Takano,Yushu Matsushita

    The International Rubber Conference 2016 Kitakyushu   (北九州国際会議場)  2016.10  -  2016.10  The Organizing Committee IRC2016 Kitakyushu

  • Analysis of Poly(ethylene glycol-co-propylene glycol) Using Travelling Wave Ion Mobility Mass Spectrometry

    K. Ito, S. Kitagawa, H. Ohtani

    RSC Tokyo International Conference 2016   (幕張メッセ)  2016.09  -  2016.09  日本機器分析工業会

  • Development of nLC-1MS employing frequency division multiplexing for simultaneous analyses of multiple samples

    H. Kishi, T. Kumazaki, S. Kitagawa, H. Ohtani

    RSC Tokyo International Conference 2016   (幕張メッセ)  2016.09  -  2016.09  日本機器分析工業会

  • MALDI-MS imaging of hindered amine light stabilizer in polypropylene film sample

    OHTANI Hajime, YAMAHARA Ayaka, HASHIZAKI Riho, KITAGAWA Shinya, IIGUNI Yoshinori

    9th International Conference on Modification, Degradation and Stabilization of Polymers (MoDeSt 2016)  (Qubus Hotel in Krakow)  2016.09  -  2016.09  the ModeSt Society

  • Stabilization of polyoxymethylene by hydrazide compounds studied by MALDI-MS

    NISHIOKA Tetsuma, OHTANI Hajime

    9th International Conference on Modification, Degradation and Stabilization of Polymers (MoDeSt 2016)  (Qubus Hotel in Krakow)  2016.09  -  2016.09  the ModeSt Society

  • Detailed thermal decomposition mechanisms of thermosetting resins in tetralin studied by MALDI-MS and pyrolysis-GC-MS

    SAKAI Shun, KANO Ryota, OHTANI Hajime

    9th International Conference on Modification, Degradation and Stabilization of Polymers (MoDeSt 2016)  (Qubus Hotel in Krakow)  2016.09  -  2016.09  the ModeSt Society

  • Electrophoretic separation of linear synthetic polymers in non-aqueous medium containing ionic surfactants

    S. Kitagawa, T. Yamamura, N. Fukai, H. Ohtani

    31st International Symposium on Chromatography (ISC2016)  (University College Cork)  2016.08  -  2016.09 

  • High performance liquid chromatography at -196ºC and its retention control

    T. Motono, S. Kitagawa, H. Ohtani

    31st International Symposium on Chromatography (ISC2016)  (University College Cork)  2016.08  -  2016.09 

  • Development of tandem micro‐reactor GC/MS system with pressure control module suitable for medium pressure catalytic reactions

    M. Soll, A. Watanabe, K. Ito, C. Watanabe, N. Teramae, H. Ohtani

    21th International Symposium on Analytical & Applied Pyrolysis (PYRO2016)  (the Faculty of Pharmacy in Nancy)  2016.05  -  2016.05  PYRO2016 organizing committee

  • Molar mass dependence of chemical structures in polymer materials characterized by pyrolysis-GC-MS combined with size exclusion chromatographic fractionation

    H. Ohtani, B. Hashimoto, T. Kawakami

    21th International Symposium on Analytical & Applied Pyrolysis (PYRO2016)  (the Faculty of Pharmacy in Nancy)  2016.05  -  2016.05  PYRO2016 organizing committee

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Academic Activity

  • 2016.03
    -
    Now

    The Japan Society for Analytical Chemistry  

  • 2014.04
    -
    Now

    The Japan Society for Analytical Chemistry  

  • 2014.04
    -
    2015.03

    The Japan Society for Analytical Chemistry  

  • 2014.03
    -
    2016.02

    The Japan Society for Analytical Chemistry  

  • 2013.03
    -
    2014.02

    The Japan Society for Analytical Chemistry  

  • 2012.03
    -
    Now

    The Society of Polymer Sciences, Japan  

  • 2012.03
    -
    2013.02

    The Chemical Society of Japan  

  • 2011.03
    -
    2013.02

    The Japan Society for Analytical Chemistry  

  • 2010.03
    -
    2011.02

    The Japan Society for Analytical Chemistry  

  • 2010.03
    -
    2011.02

    The Japan Society for Analytical Chemistry  

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