九州大学 研究者情報
論文一覧
藤ヶ谷 剛彦(ふじがや つよひこ) データ更新日:2018.07.15

教授 /  工学研究院 応用化学部門 分子情報システム


原著論文
1. Sumit Verma, Yuki Hamasaki, Chaerin Kim, Wenxin Huang, Shawn Lu, Huei Ru Molly Jhong, Andrew A. Gewirth, Tsuyohiko Fujigaya, Naotoshi Nakashima, Paul J.A. Kenis, Insights into the Low Overpotential Electroreduction of CO2 to CO on a Supported Gold Catalyst in an Alkaline Flow Electrolyzer, ACS Energy Letters, 10.1021/acsenergylett.7b01096, 3, 1, 193-198, 2018.01, [URL], Cost competitive electroreduction of CO2 to CO requires electrochemical systems that exhibit partial current density (jCO) exceeding 150 mA cm-2 at cell overpotentials (|ηcell|) less than 1 V. However, achieving such benchmarks remains difficult. Here, we report the electroreduction of CO2 on a supported gold catalyst in an alkaline flow electrolyzer with performance levels close to the economic viability criteria. Onset of CO production occurred at cell and cathode overpotentials of just -0.25 and -0.02 V, respectively. High jCO (∼99, 158 mA cm-2) was obtained at low |ηcell| (∼0.70, 0.94 V) and high CO energetic efficiency (∼63.8, 49.4%). The performance was stable for at least 8 h. Additionally, the onset cathode potentials, kinetic isotope effect, and Tafel slopes indicate the low overpotential production of CO in alkaline media to be the result of a pH-independent rate-determining step (i.e., electron transfer) in contrast to a pH-dependent overall process..
2. Koichiro Mori, Minoru Kawaguchi, Tsuyohiko Fujigaya, Jun Ohno, Tetsuro Ikebe, Polymer-coated carbon nanotubes as a molecular heater platform for hyperthermic therapy, Journal of Hard Tissue Biology, 10.2485/jhtb.27.139, 27, 2, 139-146, 2018.01, [URL], Carbon nanotubes have been explored as heat-delivery vehicles for thermal ablation of tumors. To use single-walled carbon nanotubes (SWNT) as a “molecular heater” for hyperthermic therapy in cancer treatment, stable dispersibility and smart-targeting potential are necessary. The current study reports the dispersibility and exothermic properties with near-infrared (NIR) exposure for SWNT coated with a copolymer of N-isopropylacrylamide and polyethyleneglycol methacrylate (SWNT/PNIPAM-PEG-hybrid). The SWNT/PNIPAM-PEG hybrid showed stable dispersibility in PBS solution and exothermic potential with NIR exposure. Raman spectroscopy results revealed a hybrid derived Raman peak in mouse liver and spleen lysates for 7 days post-injection that disappeared by 14 days in all tissues (liver, spleen, heart, lung and kidney). These results suggested that the hybrid did not accumulate in mouse organ tissues in the long-term. The SWNT/PNIPAM-PEG hybrid decreased the cell viability (of mouse macrophages) with heat generation by NIR exposure. The results of this study demonstrate that the SWNT/PNIPAM-PEG hybrid is a useful platform for a “molecular heater” applicable to hyperthermic cancer therapy..
3. Tomoya Shimono, Masaya Matsuki, Teppei Yamada, Masa-Aki Morikawa, Nobuhiro Yasuda, Tsuyohiko Fujigaya, Nobuo Kimizuka, Selective ionic conduction in choline iodide/triiodide solid electrolyte and its application to thermocells, Chemistry Letters, 10.1246/cl.171069, 47, 3, 261-264, 2018.01, [URL], A thermocell consisting of choline iodide/triiodide solid electrolyte is developed. Seebeck coefficient of the cell is10.87 mV K11 at ambient temperature, which sign is opposite to that of the aqueous I1/I3 1 cell. The ionic conductivity of I3 1doped choline iodide is higher than that of pure choline iodide by two to four orders of magnitude, reflecting high conductivity of I3 1 in the solid electrolyte. The selective ionic conduction observed in the solid electrolytes provides a novel design principle for the thermoelectric conversion materials..
4. Huei Ru “Molly” Jhong, Claire E. Tornow, Chaerin Kim, Sumit Verma, Justin L. Oberst, Paul S. Anderson, Andrew A. Gewirth, Tsuyohiko Fujigaya, Naotoshi Nakashima, Paul J.A. Kenis, Gold Nanoparticles on Polymer-Wrapped Carbon Nanotubes
An Efficient and Selective Catalyst for the Electroreduction of CO2, ChemPhysChem, 10.1002/cphc.201700815, 18, 22, 3274-3279, 2017.11, [URL], 優れた電気伝導性を持つカーボンナノチューブ上に金ナノ粒子を担持することに成功し、二酸化炭素電気化学還元触媒として用いたところ、高い選択性と低い過電圧を示すことが明らかとなった。.
5. Inas H. Hafez, Mohamed R. Berber, Tsuyohiko Fujigaya, Naotoshi Nakashima, High Electronic Conductivity and Air Stability of Ultrasmall Copper-Metal Nanoparticles Supported on Pyridine-Based Polybenzimidazole Carbon Nanotube Composite, ChemCatChem, 10.1002/cctc.201700921, 9, 22, 4282-4286, 2017.11, [URL], The development of synthetic methods of copper nanoparticles (Cu-NPs) on conductive supports is very challenging and receives much attention. Here, we describe a novel technique to grow stable and uniform metallic Cu-NPs homogeneously on the surface of pristine multiwalled carbon nanotube (MWNTs) catalyst support physically functionalized with a pyridine-based polybenzimidazole (PyPBI) polymer that acts as a ligand to capture the Cu-NPs. Cu-metal nanoparticles with a particle size of 5.0±0.5 nm were obtained on the surface of MWNTs with homogenous and uniform distribution. The newly prepared Cu-NPs show a remarkably enhanced air stability and electrical conductivity, compared to the current state of the art Cu-NPs, over 20 days and 500 potential cycles, respectively, with a limited degradation rate of Cu-metallic state. The PyPBI polymer plays an essential role in the stability of Cu-NPs on the surface of MWNTs through coordination with PyPBI, suppressing the Cu-degradation process, which usually decreases the Cu application efficiency. Accordingly, the prospects of applications of the present Cu-NPs composite are excellent..
6. Mohamed Mahmoud Nasef, Tsuyohiko Fujigaya, Ebrahim Abouzari-Lotf, Naotoshi Nakashima, Electrospinning of poly(vinylpyrrodine) template for formation of ZrO2 nanoclusters for enhancing properties of composite proton conducting membranes, International Journal of Polymeric Materials and Polymeric Biomaterials, 10.1080/00914037.2016.1201829, 66, 6, 289-298, 2017.04, [URL], Nanosized ZrO2 clusters were prepared by electrospinning a poly(vinylpyrrodine) (PVP)/ZrO2 mixture for calcination to remove PVP template and sizing. The morphological, chemical, structural, and thermal resistance changes during preparation stages were investigated using scanning electron microscope, energy-dispersive X-ray spectroscopy, transmission electron microscope, X-ray diffraction, and thermogravimetric analysis. The obtained ZrO2 clusters were used for preparation of nanocomposite membranes by dispersion in 2,6-pyridine polybenzimidazole (2,6-Py-PBI) matrix at 5 wt% content followed by phosphoric acid (PA) doping. The ZrO2 nanoclusters were found to be uniformly distributed in 2,6-Py-PBI/PA matrix leading to a remarkable increase in the PA doping level and proton conductivity of the obtained composite membrane..
7. Jun Yang, Tsuyohiko Fujigaya, Naotoshi Nakashima, Decorating unoxidized-carbon nanotubes with homogeneous Ni-Co spinel nanocrystals show superior performance for oxygen evolution/reduction reactions, Scientific Reports, 10.1038/srep45384, 7, 2017.03, [URL], We present a new concept for homogeneous spinel nanocrystal-coating on high crystalline pristine-carbon nanotubes (CNTs) for efficient and durable oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). Oxidized CNTs have widely been used to functionalize with metal or metal oxides since the defect sites act as anchoring for metal oxide binding. However, such defects on the tubes cause the decrease in electrical conductivity and stability, leading to lower catalyst performance. In the present study, at first, pristine multi-walled carbon nanotubes (MWNTs) were wrapped by pyridine-based polybenzimidazole (PyPBI) to which uniform Ni x Co 3-x O 4 nanocrystals were homogeneously deposited by the solvothermal method without damaging the MWNTs, in which PyPBI acted as efficient anchoring sites for the deposition of spinel oxide nanocrystals with ∼5 nm size. The obtained catalyst (MWNT-PyPBI-Ni x Co 3-x O 4) outperformed most state-of-the-art non-precious metal-based bifunctional catalysts; namely, for OER, the potential at 10 mA cm -2 and Tafel slope in 1 M KOH solution were 1.54 V vs. RHE and 42 mV dec -1, respectively. For ORR, the onset and half-wave potentials are 0.918 V and 0.811 V vs. RHE, respectively. Moreover, the MWNT-PyPBI-Ni x Co 3-x O 4 demonstrates an excellent durability for both ORR and OER..
8. Yuki Nakashima, Naotoshi Nakashima, Tsuyohiko Fujigaya, Development of air-stable n-type single-walled carbon nanotubes by doping with 2-(2-methoxyphenyl)-1,3-dimethyl-2,3-dihydro-1H-benzo[d]imidazole and their thermoelectric properties, Synthetic Metals, 10.1016/j.synthmet.2016.11.042, 225, 76-80, 2017.03, [URL], 近年ウェアラブルデバイスの電源として有望視されている熱電変換材料のうち、フレキシブル性に優れ、高い電気伝導率を持つカーボンナノチューブに注目が集まっている。しかし、カーボンナノチューブのような有機系材料においては大気安定なn型材料を作るのが困難であった。我々はベンズイミダゾール誘導体がカーボンナノチューブを大気安定n型化するドープ剤であることを世界に先駆けて発見した。.
9. Tsuyohiko Fujigaya, Yilei Shi, Jun Yang, Hua Li, Kohei Ito, Naotoshi Nakashima, A highly efficient and durable carbon nanotube-based anode electrocatalyst for water electrolyzers, Journal of Materials Chemistry A, 10.1039/c7ta01318c, 5, 21, 10584-10590, 2017.01, [URL], Iridium (Ir) nanoparticles with a uniform diameter of 1.1 ± 0.2 nm were homogeneously deposited on multi-walled carbon nanotubes (MWNTs) wrapped by polybenzimidazole (PBI), in which PBI enables efficient anchoring of the Ir nanoparticles. The Ir nanoparticles were electrochemically oxidized to afford Ir oxide (IrO) and evaluated as an oxygen evolution reaction catalyst by half-cell measurements. The composite was also used as an anode electrocatalyst for proton exchange membrane water electrolyzers (PEMWEs). It was revealed that the IrO2 on the PBI-wrapped MWNTs exhibited a very high electrocatalytic mass activity and durability even compared to the other state-of-the-art Ir-based catalysts, while the IrO2 deposited on conventional carbon black showed only a poor durability..
10. Tsuyohiko Fujigaya, Chiori Saito, Ziyi Han, Naotoshi Nakashima, Ionomer grafting to polymer-wrapped carbon nanotubes for polymer electrolyte membrane fuel cell electrocatalyst, Chemistry Letters, 10.1246/cl.170744, 46, 11, 1660-1663, 2017.01, [URL], Polybenzimidazole-wrapped carbon nanotubes (CNTs) is grafted by quaternized 1,4-diazabicyclo[2,2,2]octane (DABCO) and used as a new electrocatalyst for the anion-exchange membrane fuel cells after loading of platinum nanoparticles. Single-cell measurements reveal that the power density of the cell is 58.8mWcm-2, higher than that of non-grafted analogue. We found the grafting approach to be a promising strategy to avoid leaching of the water-soluble quaternized ionomer..
11. J. Yang, F. Toshimitsu, Z. Yang, Tsuyohiko Fujigaya, N. Nakashima, Pristine carbon nanotube/iron phthalocyanine hybrids with a well-defined nanostructure show excellent efficiency and durability for the oxygen reduction reaction, Journal of Materials Chemistry A, 10.1039/C6TA07882F, 5, 3, 1184-1191, 2017.01, [URL], Development of non-platinum electrocatalysts with high performance, durability, and scalability for fuel cells and batteries is a strong social demand for a next-generation eco-friendly energy society. Here, we present a pristine multi-walled carbon nanotube/iron phthalocyanine (MWNT/FePc) hybrid catalyst with a well-defined nanostructure for the oxygen reduction reaction (ORR) in alkaline media that meets this demand. By carefully tuning the microstructure of the FePc stack layer deposited on the highly crystallized graphitic surface of a MWNT support, an ultra-high ORR activity as well as excellent durability are obtained. Moreover, a power density of 185 mW cm−2 at 0.8 V was obtained for a zinc-air battery using this optimized MWNT/FePc cathode at room temperature. Density functional theory-based calculations of such a well-defined nanostructure of MWNT/FePc have suggested that deposition on the bent graphitic surface of MWNTs significantly changes the geometric and electronic structures of FePc that originated from π-π interactions, leading to such enhanced electrocatalytic activity and durability..
12. Tsuyohiko Fujigaya, Toward the development of highly durable polymer electrolyte fuel cell using carbon nanotube, Sen'i Gakkaishi, 73, 5, 213-214, 2017.
13. H. Wenxin, N. Nakashima, Tsuyohiko Fujigaya, Solvent-free Fabrication of Carbon Nanotube/Resin Composite for Printable Thermoelectric Device, CHEMISTRY LETTERS, 10.1246/cl.160399, 45, 8, 875-877, 2016.08.
14. Tsuyohiko Fujigaya, Shinsuke Hirata, M. R. Berber, Improved Durability of Electrocatalyst Based on Coating of Carbon Black with Polybenzimidazole and their Application in Polymer Electrolyte Fuel Cells, ACS APPLIED MATERIALS & INTERFACES, 10.1021/acsami.6b01316, 8, 23, 14494-14502, 2016.06.
15. Li Hua, Akiko Inada, Tsuyohiko Fujigaya, Hironori NAKAJIMA, Kazunari SASAKI, Kohei Ito, Effects of operating conditions on performance of high-temperature polymer electrolyte water electrolyzer, Journal of Power Sources, doi:10.1016/j.jpowsour.2016.03.108, 318, 192-199, 2016.04.
16. Yusuke Tsutsumi, Tsuyohiko Fujigaya, Naotoshi Nakashima, Requirement for the Formation of Crosslinked Polymers on Single-walled Carbon Nanotubes Using Vinyl Monomers, CHEMISTRY LETTERS, 10.1246/cl.151086, 45, 3, 274-276, 2016.03.
17. Tsuyohiko Fujigaya, Yusuke Saegusa, Shogo Momota, Nobuhide Uda, Naotoshi Nakashima, Interfacial Engineering of Epoxy/Carbon Nanotube by using Reactive Glue for Effective Reinforcement of the Composite, Polymer Journal, 48, 183-188, 2016.02.
18. Tsuyohiko Fujigaya, ChaeRin Kim, Yuki Hamasaki, Naotoshi Nakashima, Growth and Deposition of Au Nanoclusters on Polymer-wrapped Graphene and Their Oxygen Reduction Activity, SCIENTIFIC REPORTS, 10.1038/srep21314, 6, 2016.02.
19. Tsuyohiko Fujigaya, C.R Kim, Yiki Hamasaki, Naotoshi Nakashima, Growth and Deposition of Au Nanoclusters on Polymer-wrapped Graphene and Their Oxygen Reduction Activity, SCIENTIFIC REPORTS, 10.1038/srep21314, 6, 2016.02.
20. Yusuke Segusa, Tsuyohiko Fujigaya, Naotoshi Nakashima, Interfacial Engineering of Epoxy/Carbon Nanotube by using Reactive Glue for Effective Reinforcement of the Composite, Polymer Journal, 2016.02.
21. Naoki Imazu, Tsuyohiko Fujigaya, Naotoshi Nakashima, Fabrication of flexible transparent conductive films from long double-walled carbon nanotubes, Sci. Technol. Adv. Mater. , 10.1088/1468-6996/15/2/025005, 15, 025005, 2016.01.
22. Zehui Yang, Tsuyohiko Fujigaya, Naotoshi Nakashima, Homogeneous coating of ionomer on electrocatalyst assisted by polybenzimidazole as an adhesive layer and its effect on fuel cell performance, JOURNAL OF POWER SOURCES, 10.1016/j.jpowsour.2015.09.069, 300, 175-181, 2015.12.
23. Yusuke Tsutsumi, Tsuyohiko Fujigaya, Naotoshi Nakashima, Requirement for the Formation of Cross-linked Polymer on Single-walled Carbon Nanotubes Using Vinyl Monomers, Chem. Lett., 45, 3, 274-276, 2015.12.
24. Tsuyohiko Fujigaya, Hirata Shinsuke, Naotoshi Nakashima, A highly durable fuel cell electrocatalyst based on polybenzimidazole-coated stacked graphene, JOURNAL OF MATERIALS CHEMISTRY A, 10.1039/c3ta14469k, 2, 11, 3888-3893, 2015.11.
25. BERBER MOHAMED, Tsuyohiko Fujigaya, Naotoshi Nakashima, A highly durable fuel cell electrocatalyst based on double-polymer-coated carbon nanotubes, Scientific Reports, 5, 167111, 2015.10.
26. Yusuke Tsutsumi, Tsuyohiko Fujigaya, Naotoshi Nakashima, Size reduction of 3D-polymer-coated single-walled carbon nanotubes by ultracentrifugation, NANOSCALE, 10.1039/c5nr05066a, 7, 46, 19534-19539, 2015.10.
27. BERBER MOHAMED, Tsuyohiko Fujigaya, Naotoshi Nakashima, A highly durable fuel cell electrocatalyst based on double-polymer-coated carbon nanotubes, Scientific Reports, 5, 167111, 2015.10.
28. Zehui Yang, ChaeRin Kim, Shinsuke Hirata, Tsuyohiko Fujigaya, Naotoshi Nakashima, Facile Enhancement in CO-Tolerance of a Polymer-Coated Pt Electrocatalyst Supported on Carbon Black: Comparison between Vulcan and Ketjenblack, ACS APPLIED MATERIALS & INTERFACES, 10.1021/acsami.5b03371, 7, 29, 15885-15891, 2015.07.
29. Zehui Yang, ChaeRin Kim, Shinsuke Hirata, Tsuyohiko Fujigaya, Naotoshi Nakashima, Facile Enhancement in CO-Tolerance of a Polymer-Coated Pt Electrocatalyst Supported on Carbon Black: Comparison between Vulcan and Ketjenblack, ACS APPLIED MATERIALS & INTERFACES, 10.1021/acsami.5b03371, 7, 29, 15885-15891, 2015.07.
30. Zehui Yang, Tsuyohiko Fujigaya, Naotoshi Nakashima, A phosphoric acid-doped electrocatalyst supported on poly(para-pyridine benzimidazole)- wrapped carbon nanotubes shows a high durability and performance, J. Mater. Chem. A, 5, 12236, 2015.01.
31. ChaeRin Kim, Tsuyohiko Fujigaya, Naotoshi Nakashima, One-pot Synthesis of Gold-Platinum Core-Shell Nanoparticles on Polybenzimidazole-decorated Carbon Nanotubes, CHEMISTRY LETTERS, 10.1246/cl.140663, 43, 11, 1737-1739, 2014.11.
32. Akiyo Nagashima, Tsuyohiko Fujigaya, Naotoshi Nakashima, Effect of Nanostructure of the Electrocatalyst Based on Carbon Nanotube for the Activation Overpotential for PEFC, JOURNAL OF MATERIALS CHEMISTRY C, 10.1149/06403.0151ecst, 64, 3, 151-157, 2014.10.
33. Tsuyohiko Fujigaya, BERBER MOHAMED, Naotoshi Nakashima, Design of Highly Durable Electrocatalyst for High-Temperature Polymer Electrolyte Fuel Cell, POLYMER ELECTROLYTE FUEL CELLS 14, 10.1149/06403.0159ecst, 64, 3, 159-169, 2014.10.
34. Takao Sada, Tsuyohiko Fujigaya, Naotoshi Nakashima, Layer-by-layer Assembly of Trivalent Metal Cation and Anionic Polymer in Nanoporous Anodic Aluminum Oxide with 35 nm Pore, CHEMISTRY LETTERS, 10.1246/cl.140489, 43, 9, 1478-1480, 2014.09.
35. Yoo JongTae, ChaeRin Kim, Tsuyohiko Fujigaya, Naotoshi Nakashima, Graphene oxide and laponite composite films with high oxygen-barrier properties, NANOSCALE, 10.1039/c4nr03429e, 6, 18, 10824-10830, 2014.09.
36. Naotoshi Nakashima, Tsuyohiko Fujigaya, Junichi Morita, Grooves of Bundled Single-Walled Carbon Nanotubes Dramatically Enhance the Reactivity of Oxygen Reduction Reaction, ChemCatChem, 10.1002/cctc.201402565, 6, 11, 3169-3173, 2014.09.
37. Hafez Inas H, BERBER MOHAMED, Tsuyohiko Fujigaya, Naotoshi Nakashima, Enhancement of Platinum Mass Activity on the Surface of Polymer-wrapped Carbon Nanotube-Based Fuel Cell Electrocatalysts, SCIENTIFIC REPORTS, 10.1038/srep06295, 4, 2014.09.
38. BERBER MOHAMED, Tsuyohiko Fujigaya, Naotoshi Nakashima, Durability Analysis of Polymer-coated Pristine Carbon Nanotube-based Fuel Cell Electrocatalyst at Non-humidified Conditions, Journal of Materials Chemistry A , 2, 44, 19053-19059, 2014.09.
39. Takao Sada, Tsuyohiko Fujigaya, Naotoshi Nakashima, Manipulation of cell membrane using carbon nanotube scaffold as a photoresponsive stimuli generator, SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 10.1088/1468-6996/15/4/045002, 15, 4, 2014.08.
40. JongTae Yoo, ChaeRin Kim, Tsuyohiko Fujigaya, Naotoshi Nakashima, Homogeneous decoration of zeolitic imidazolate framework-8 (ZIF-8) with core-shell structures on carbon nanotubes, RSC ADVANCES, 10.1039/c4ra06792d, 4, 91, 49614-49619, 2014.07.
41. 藤ヶ谷 剛彦, ミセル可溶化カーボンナノチューブ表面での重合による高分子複合化の作製, Colloid & Interface communication , 39, 24-26, 2014.05.
42. Takao Sada, Tsuyohiko Fujigaya, Naotoshi Nakashima, Design and fabrication of Ni nanowires having periodically hollow nanostructures, NANOSCALE, 10.1039/c4nr02625j, 6, 19, 11484-11488, 2014.05.
43. BERBER MOHAMED, 藤ヶ谷 剛彦, 中嶋 直敏, High-Temperature Polymer Electrolyte Fuel Cell Using Poly(vinylphosphonic acid) as an Electrolyte Shows a Remarkable Durability, CHEMCATCHEM, 10.1002/cctc.201300884, 6, 2, 567-571, 2014.02.
44. 藤ヶ谷 剛彦, 金 菜リン, 松本 和也, Palladium-Based Anion- Exchange Membrane Fuel Cell Using KOH- Doped Polybenzimidazole as the Electrolyte, CHEMPLUSCHEM, 10.1002/cplu.201300377, 79, 3, 400-405, 2014.03.
45. Takahiro Fukumaru, Fumiyuki Toshimitsu, Tsuyohiko Fujigaya, Naotoshi Nakashima, Effects of the chemical structure of polyfluorene on selective extraction of semiconducting singlewalled carbon nanotubes, Nanoscale, 10.1039/c4nr00809j, 6, 5879 -5886, 2014.03.
46. 堤 優介, 藤ヶ谷 剛彦, 中嶋 直敏, Polymer synthesis inside a nanospace of a surfactant-micelle on carbon nanotubes: creation of highly-stable individual nanotubes/ultrathin cross-linked polymer hybrids, RSC ADVANCES, 10.1039/c3ra46841k, 4, 12, 6318-6323, 2013.12.
47. Takahiro Fukumaru, Tsuyohiko Fujigaya, Naotoshi Nakashima, Fabrication of Poly(p-phenylene benzobisoxazole) Film Using a Soluble Poly(o-alkoxyphenyl amide) as the Precursor, Macromolecules, 4, 6318-6323, 2013.11.
48. 藤ヶ谷 剛彦, 中嶋 直敏, 福丸貴弘, Fabrication of Poly(p-phenylene benzobisoxazole) Film Using a Soluble Poly(o-alkoxyphenyl amide) as the Precursor, Macromolecules, 10.1021/ma4024526, 47, 2088-2095, 2013.05.

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