Tokushima University / Educator and Researcher Directory --- Kurashina, Masashi

Personal Web Page

https://researchmap.jp/read0103634 (researchmap)

Field of Study

○	Inorganic Chemistry, Coordination Chemistry

Subject of Study

○	金属イオンを配列制御した材料の電子・磁気物性 (遷移金属イオン, 電子的相互作用, 磁性, 層状化合物)

Book / Paper

Book:

1.	Masashi Kurashina and Approximately 150 authors : Encyclopedia of Phosphorus, 朝倉書店, Tokyo, Nov. 2017.
2.	Tokuo Ohnishi, Yasuhiro Uosaki, Kenichi Maeda, Masami Shishibori, Susumu Nakano, Yoshihiro Tada, Junji Tamatani, Naoyuki Shimomura, Atsushi Mikami, Masashi Kurashina, Maki Nakamura, Shigeru Sugiyama, Masato Ozawa, Hirotsugu Yamamoto, Tokue Kuroda, Atsushi Tabata, Yuka Sasaki and Mika Shimaki : Safety Manual, Faculty of Engineering, Tokushima, Feb. 2010.

Academic Paper (Judged Full Paper):

1.	Yumeng Zhao, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : Biocompatibility of zwitterionic polymer-modified surface under acidic condition, Modern Physics Letters. B, Vol.37, No.19, 2340033, 2023. (Summary) In this study, properties such as hydrophilicity and biocompatibility of surfaces prepared with 2-methacryloyloxyethyl phosphorylcholine (MPC) were evaluated under neutral to acidic conditions. The MPC-modified surface exhibit high hydrophilicity in neutral condition due to the ionization effect, while under acidic conditions below pH 3, the hydrophilicity gradually decreased due to the decrease in the negative charge of the PC groups. Biocompatibility property was evaluated by measuring the adsorption prevention effect against fibrinogen. The adsorption of fibrinogen was hardly observed on scanning electronic microscope (SEM) pictures under pH 7.6, which was significantly lower than that of the bare glass. However, the adsorption ratio increased under acidic conditions of pH 2.8 indicating a decrease in biocompatibility. (Keyword) Zwitterionic monomer / SI-ARGET-ATRP / protein adsorption / biocompatibility (Link to Publication Site) ● Publication site (DOI): 10.1142/S021798492340033X (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S021798492340033X (DOI: 10.1142/S021798492340033X)
2.	Quyen Hong Ho, Masashi Kurashina and Mikito Yasuzawa : Removal of phosphate from aqueous solution by using thermally modified clamshell, Modern Physics Letters. B, Vol.36, No.16, 2242011, 2022. (Link to Publication Site) ● Publication site (DOI): 10.1142/S0217984922420118 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S0217984922420118 (DOI: 10.1142/S0217984922420118)
3.	Masashi Kurashina, Haoyuan Li, Shiba Keita, Morishita Yuta, Shibata Kazuki, Mikito Yasuzawa and Quyen Hong Ho : Syntheses of D-glucamine and N-methyl-D-glucamine modified chitosan for boron adsorption, Modern Physics Letters. B, Vol.36, No.16, 2242001, 2022. (Tokushima University Institutional Repository) ● Metadata: 117473 (Link to Publication Site) ● Publication site (DOI): 10.1142/S0217984922420015 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S0217984922420015 (Tokushima University Institutional Repository: 117473, DOI: 10.1142/S0217984922420015)
4.	Toshiki Nakao, Masaki GOTO, Masashi Kurashina, Nobutake Tamai, Mikito Yasuzawa and Hitoshi Matsuki : Temperature- and Pressure-Induced Bilayer Phase Transitions of an Amide-Linked Phosphatidylcholine: A Contrasting Effect of Chain Linkage Type, Bulletin of the Chemical Society of Japan, Vol.95, No.2, 261-270, 2022. (Summary) An unnatural phospholipid with two amide linkages, dipalmitoylamidodeoxyphosphatidylcholine (DPADPC), was synthesized and its bilayer phase transitions were observed by differential scanning calorimetry under atmospheric pressure and light-transmittance measurements under high pressure. The DPADPC bilayer membrane showed different phase transitions depending on the thermal history of the lipid sample under atmospheric pressure. The thermal-history dependent transitions were also observed under high pressure. The temperature pressure phase diagram and thermodynamic quantities of the phase transitions of the DPADPC bilayer membrane were compared with those of bilayer membranes of hydrophobic chain-linkage isomers, ester-liked dipalmitoylphosphatidylcholine (DPPC) and ether-linked dihexadecylphosphatidylcholine (DHPC). The thermodynamic quantities of the main transition for these PC bilayer membranes were similar to each other, whereas the suppression of the interdigitation and great stabilization of the hydrated crystal phase were observed for the DPADPC bilayer membrane. Furthermore, the results of nuclear magnetic resonance measurements indicated that the motility of PC molecules in both gel and liquid crystal phases of the DPADPC bilayer membranes were much lower than those of the DPPC and DHPC bilayer membranes. From the above results, we concluded that the molecular interaction in the PC bilayer membranes increases in the order of ether-, ester- and amide-linkage isomers. (Keyword) Amide-linked phospholipid / Lipid bilayer membrane / phase transition (Link to Publication Site) ● Publication site (DOI): 10.1246/bcsj.20210395 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1246/bcsj.20210395 (DOI: 10.1246/bcsj.20210395)
5.	Shigeru Sugiyama, Kenji Wakisaka, Kenta Imanishi, Masashi Kurashina, Naohiro Shimoda, Masahiro Katoh and Jhy-Chern Liu : Recovery of Phosphate Rock Equivalents from Incineration Ash of Chicken Manure by Elution-precipitation Treatment, Journal of Chemical Engineering of Japan, Vol.52, No.9, 778-782, 2019. (Summary) In order to obtain calcium phosphates - a phosphate rock equivalent - from the incineration ash of chicken manure, which is obtained from power generation systems that use the manure for fuel, incineration ash was treated with an aqueous solution of nitric acid to elute phosphorus. By using 0.3 M of HNO3, most of the phosphorus could be eluted from 1.0 g of ash within 0.1 h. Compared with the composted chicken manure that was previously examined in our laboratory, the concentration of HNO3 was increased for this session of elution. Using the incineration ash of chicken manure made it possible to remove inorganic species at a lower boiling or sublimation temperature, and organic species by calcination in the power generation system. Compared with composted chicken manure, the concentrations of phosphorus contained in the incineration ash and the nitric acid extract were higher in the incineration ash. XRD analysis showed that the obtained nitric acid extract could be treated with aqueous NH3 to form a precipitation of poorly-crystallized calcium hydroxyapatite (Ca10(PO4)6(OH)2), which is one of main components in phosphate rock. In order to confirm the formation and purity of calcium phosphate species, the precipitation calcination was conducted at 1,078 K for 5 h. XRD revealed that the calcined solid was tricalcium phosphate, and no contamination was evident. These results reveal that a phosphate rock equivalent could be easily obtained from the incineration ash of chicken manure, which means that approximately 14% of the phosphate rock that is currently being imported into Japan could be replaced by this product. (Keyword) Incineration ash / Chicken manure / Recovery of phosphorus / Phosphate rock equivalent (Tokushima University Institutional Repository) ● Metadata: 113780 (Link to Publication Site) ● Publication site (DOI): 10.1252/jcej.19we030 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85076244800 (Tokushima University Institutional Repository: 113780, DOI: 10.1252/jcej.19we030, Elsevier: Scopus)
6.	Toshio Takayanagi, Yuta Becchaku, Yuki Tomiyama, Masashi Kurashina and Hitoshi Mizuguchi : Polyethylene Glycols for the Dispersion Development of Graphene in an Aqueous Surfactant Solution Studied by Affinity Capillary Electrophoresis, Analytical Sciences, Vol.35, No.3, 307-313, 2019. (Tokushima University Institutional Repository) ● Metadata: 114226 (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.18P433 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 30416168 ● Summary page in Scopus @ Elsevier: 2-s2.0-85062698396 (Tokushima University Institutional Repository: 114226, DOI: 10.2116/analsci.18P433, PubMed: 30416168, Elsevier: Scopus)
7.	Yuki Kato, Shinya Nitta, Sho Shimazu, Masashi Kurashina, Masahiro Katoh, Wataru Ninomiya and Shigeru Sugiyama : Effect of Introduction of Trace Amount of Chromium Species in Improving Catalytic Performance of MCM-48 in Oxidative Dehydrogenation of Isobutane, Journal of Chemical Engineering of Japan, Vol.52, No.1, 99-105, 2019. (Summary) The catalytic performance of MCM-48 was greatly improved by the introduction of a small amount of chromium during the oxidative dehydrogenation of isobutane. Various characterization procedures such as XRD, N2 adsorption-desorption isotherms, TEM, NH3-TPD, XPS, and XAFS were used to clarify the role that chromium played in the improvement, and XPS and XAFS returned the most valuable information. Both measurements revealed that the chromium species existed as Cr6+ inside the framework of MCM-48 before oxidative dehydrogenation, but was reduced to Cr3+ during the reaction. The characteristic pore nature of MCM-48 also contributed to an enhancement of the selectivity to isobutene via a suppression of any consecutive oxidation reactions. (Keyword) Oxidative dehydrogenation / Isobutane / Isobutene / MCM-48 / Chromium (Tokushima University Institutional Repository) ● Metadata: 113241 (Link to Publication Site) ● Publication site (DOI): 10.1252/jcej.18we028 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85062808327 (Tokushima University Institutional Repository: 113241, DOI: 10.1252/jcej.18we028, Elsevier: Scopus)
8.	Masashi Kurashina, Ikeuchi Daiki, Ohara Masaki, Toshio Takayanagi and Mikito Yasuzawa : Syntheses and properties of copper hydroxide nanosheets and controlled deposition, International Journal of Modern Physics B, Vol.32, No.19, 1840047-1-1840047-5, 2018. (Summary) In this study, we synthesized copper hydroxide nanosheet and investigated its electro-chemical property and how to deposit it with a uniform amount. The precursor of the nanosheet was a layered copper hydroxide synthesized by the ion exchange of dodecyl-benzene sulfonate (DBS) with acetate in Cu2(OH)3(CH3COO)·H2O. The nanosheet was prepared by delamination of the layered copper hydroxide by dispersion in 1-butanol. Atomic force microscopy (AFM) images of the nanosheets showed lateral dimensions of ca. 2 μm with the height of ca. 4.5 nm. Cyclic voltammogram of the nanosheet in basic solution showed two cathodic peaks and two anodic peaks similar to the copper oxide electrode. To deposit the nanosheet, a quartz glass slide was dipped in the dispersion of the nanosheet in 1-butanol and dried after washing. This procedure was repeated and the ultraviolet (UV) and visible (Vis) light absorption spectrum of the slide was measured. The absorbance of the slide increased in direct proportion to the number of times of the dip-and-dry procedure. Thus, we confirmed that a controlled amount of nanosheet was deposited on the quartz glass. (Tokushima University Institutional Repository) ● Metadata: 117477 (Link to Publication Site) ● Publication site (DOI): 10.1142/S0217979218400477 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S0217979218400477 (Tokushima University Institutional Repository: 117477, DOI: 10.1142/S0217979218400477)
9.	Quyen Hong Ho, Maki Yoshioka, Masashi Kurashina, Mikito Yasuzawa and Thuy Thi Xuan Le : Eco-friendly removal of phosphate from aqueous solution using natural dietary fibers and minerals, International Journal of Modern Physics B, Vol.32, No.19, 1840075-1-1840075-5, 2018. (Summary) In this study, we focused on the investigation of phosphate removal using calcium oxide (CaO) and calcium hydroxide (Ca(OH)2) which are mainly from the calcined shells as adsorbents. Hydroxylapatite Ca10(PO4)6(OH)2, the component of industrial fertilizer was formed after the adsorption process following the XRD results. The phosphate removal increased from 20% to 97% with the aid of the mixture of flocculants alginic acid (AA), NaHCO3 and CaCl2 · 2H2O in the case of 50 ppm phosphate concentration when the samples were filtered through 2.7 μm particle retention filter paper which is roughly equivalent to the case of phosphate removal rate of 0.2 μm membrane filter paper without flocculants (99%). The results suggest that AA, NaHCO3 and CaCl2 · 2H2O as the flocculants are effective for phosphate removal from 20 to 100 ppm. (Link to Publication Site) ● Publication site (DOI): 10.1142/S0217979218400751 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S0217979218400751 (DOI: 10.1142/S0217979218400751)
10.	Masashi Kurashina, Fumiaki Suzuka and Mikito Yasuzawa : Electrochemical Oxidation of Glucose Using Copper Hydroxide Nanosheets, ECS Transactions, Vol.86, No.15, 23-26, 2018. (Summary) In this study, we synthesized copper hydroxide nanosheet and investigated electrochemical oxidation of glucose using the copper hydroxide nanosheets. The precursor of the nanosheet was a layered copper hydroxide synthesized by the ion exchange of dodecylbenzene sulfonate with acetate in Cu2(OH)3(CH3COO)·H2O. Delamination of the layered copper hydroxide prepared the nanosheet by dispersion in 1-butanol. Atomic force microscopy images of the nanosheets showed lateral dimensions of ca. 2 μm with a height of ca. 4.5 nm. Cyclic voltammogram of the nanosheet coated electrode showed oxidation current peak depend on the concentration of glucose at around +0.6 V vs. Ag/AgCl. Amperometry was measured at +0.6V vs. Ag/AgCl with successive addition of glucose solution. Glucose concentration and catalytic current were almost proportional. When the linear range is 0.1 to 4.9 mM, the sensitivity was 1.16 mA mM-1cm-2 from the slope. (Tokushima University Institutional Repository) ● Metadata: 117478 (Link to Publication Site) ● Publication site (DOI): 10.1149/08615.0023ecst (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1149/08615.0023ecst (Tokushima University Institutional Repository: 117478, DOI: 10.1149/08615.0023ecst)
11.	Toshio Takayanagi, Natsumi Shimakami, Masashi Kurashina, Hitoshi Mizuguchi and Tomoki Yabutani : Determination of the Acid-Base Dissociation Constant of Acid-Degradable Hexamethylenetetramine by Capillary Zone Electrophoresis, Analytical Sciences, Vol.32, No.12, 1327-1332, 2016. (Summary) The acid-base equilibrium of hexamethylenetetramine (hexamine) was analyzed with its effective electrophoretic mobility by capillary zone electrophoresis. Although hexamine is degradable in a weakly acidic aqueous solution, and the degraded products of ammonia and formaldehyde can be formed, the effective electrophoretic mobility of hexamine was measured in the pH range between 2.8 and 6.9. An acid-base dissociation equilibrium of the protonated hexamine was analyzed based on the mobility change, and an acid dissociation constant of pKa = 4.93 ± 0.01 (mean ± standard error, ionic strength: 0.020 mol dm(-3)) was determined. The monoprotic acid-base equilibrium of hexamine was confirmed through comparisons of its electrophoretic mobility with the N-ethylquinolinium ion and with the monocationic N-ethyl derivative of hexamine, as well as a slope analysis of the dissociation equilibrium. (Tokushima University Institutional Repository) ● Metadata: 114221 (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.32.1327 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 27941263 ● Summary page in Scopus @ Elsevier: 2-s2.0-85009453117 (Tokushima University Institutional Repository: 114221, DOI: 10.2116/analsci.32.1327, PubMed: 27941263, Elsevier: Scopus)
12.	Takuya Ehiro, Ai Itagaki, Hisanobu Misu, Masashi Kurashina, Keizo Nakagawa, Masahiro Katoh, Yuuki Katou, Wataru Ninomiya and Shigeru Sugiyama : Oxidative Dehydrogenation of Isobutane to Isobutene on Metal-doped MCM-41 Catalysts, Journal of Chemical Engineering of Japan, Vol.49, No.2, 136-143, 2016. (Summary) MCM-41 (#41 Mobil Composition of Matter) is a favorable material for heterogeneous reactions because of its unique porous structure. However, the catalytic activity of MCM-41 for the oxidative dehydrogenation (ODH) of isobutane to isobutene is known to be quite low. In the present study, a metal-doping method was employed to improve this catalytic activity. Doping of Cr, Co, Ni, or Mo into MCM-41 resulted in a great improvement in the catalytic activity. Since chromium-doped MCM-41 (Cr-MCM-41) showed the greatest catalytic activity among these catalysts, its redox property was further analyzed via XPS, XAFS and H2-TPR techniques. The XPS spectrum of Cr-MCM-41 suggested that it has Cr3+ and Cr6+ species on its surface. Also, a pre-edge peak due to Cr6+ species was confirmed in the XANES spectrum of Cr-MCM-41. In H2-TPR measurement, Cr-MCM-41 was more reducible than crystalline Cr2O3, which showed low catalytic activity for the ODH of isobutane. The reducible Cr6+ species on Cr-MCM-41 contributed to an improvement in the catalytic activity of MCM-41. (Keyword) Oxidative dehydrogenation / Isobutane / Isobutene / MCM-41 / Metal-doping (Tokushima University Institutional Repository) ● Metadata: 109877 (Link to Publication Site) ● Publication site (DOI): 10.1252/jcej.15we106 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1252/jcej.15we106 (Tokushima University Institutional Repository: 109877, DOI: 10.1252/jcej.15we106)
13.	Takuya Ehiro, Ai Itagaki, Masashi Kurashina, Masahiro Katoh, Keizo Nakagawa, Yuuki Katou, Wataru Ninomiya and Shigeru Sugiyama : Effect of the Template Ion Exchange Behaviors of Chromium into FSM-16 on the Oxidative Dehydrogenation of Isobutane, Journal of the Ceramic Society of Japan, Vol.123, No.12, 1084-1089, 2015. (Summary) The template ion exchange of chromium cations into FSM-16 (#16 Folded Sheets Mesoporous Materials) for 247 h resulted in a 2.89 wt% incorporation of those cations into the FSM-16, although only a 0.3 wt% incorporation had previously been reported. The XRD pattern of the resultant solid (Cr-FSM-16) showed that the hexagonal structure characteristic of FSM-16 remained after the 2.89 wt% incorporation of chromium cations. XPS could be used to detect the Cr3+ and Cr6+ species on the surface of Cr-FSM-16. A pre-edge peak that was due to a tetrahedrally coordinated Cr6+ species was confirmed in the XANES spectrum of the Cr-FSM-16, which showed that the coordination state around some Cr species was similar to that around the Si species in FSM-16. With the increase in the amount of chromium cations in FSM-16, its catalytic activity and stability during the oxidative dehydrogenation of isobutane were evidently improved. (Keyword) Template Ion Exchange / FSM-16 / Chromium / Oxidative Dehydrogenation / Isobutane (Tokushima University Institutional Repository) ● Metadata: 109868 (Link to Publication Site) ● Publication site (DOI): 10.2109/jcersj2.123.1084 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84948769052 (Tokushima University Institutional Repository: 109868, DOI: 10.2109/jcersj2.123.1084, Elsevier: Scopus)
14.	Yuki Ogawa, Masashi Kurashina, Eiji Kanezaki and Takashi Yamamoto : Effect of Aging Method on Adsorption and Elution of Phosphate in Mg/Fe Layered Double Hydroxide, Advanced Materials Research, Vol.1110, 287-290, 2015. (Link to Publication Site) ● Publication site (DOI): 10.4028/www.scientific.net/AMR.1110.287 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.4028/www.scientific.net/AMR.1110.287 (DOI: 10.4028/www.scientific.net/AMR.1110.287)
15.	Yamanoi Yoshinori, Takahashi Kazuhiro, Hamada Takeshi, Ohshima Norikazu, Masashi Kurashina, Hattori Yohei, Kusamoto Tetsuro, Sakamoto Ryota, Miyachi Mariko and Nishihara Hiroshi : Synthesis, characterization, and physical properties of oligo(1-(N,N-dimethylamino)pyrrole)s and their doped forms, precursors of candidates for molecular flat-band ferromagnets, Journal of Materials Chemistry. C, Materials for Optical and Electronic Devices, Vol.3, No.17, 4316-4320, 2015. (Link to Publication Site) ● Publication site (DOI): 10.1039/C4TC02941K (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84928722872 (DOI: 10.1039/C4TC02941K, Elsevier: Scopus)
16.	Masashi Kurashina, Tatsuki Inoue, Chihiro Tajima and Eiji Kanezaki : Removal of borate by coprecipitation with Mg/Al layered double hydroxide, Modern Physics Letters. B, Vol.29, No.6 & 7, 1540031, 2015. (Link to Publication Site) ● Publication site (DOI): 10.1142/S021798491540031X (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84928395089 (DOI: 10.1142/S021798491540031X, Elsevier: Scopus)
17.	Ken-Ichiro Sotowa, Takahiro Togawa, Yuika Shimizu, Masashi Kurashina, Toshihide Horikawa and Jesus Rafael Alcantara Avila : Effect of Mixing Methods on the Precipitation of Basic Copper Acetate, Applied Mechanics and Materials, Vol.625, 201-204, 2014. (Link to Publication Site) ● Publication site (DOI): 10.4028/www.scientific.net/AMM.625.201 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84914133399 (DOI: 10.4028/www.scientific.net/AMM.625.201, Elsevier: Scopus)
18.	Masashi Kurashina, Tomohiro Amatsu, Takaaki Ochi, Nozomi Ohigashi and Eiji Kanezaki : Elution Behavior of Phosphate Contained in Mg/Fe and Zn/Fe Layered Double Hydroxide, International Journal of Modern Physics: Conference Series, Vol.6, No.1, 156-161, 2012. (Link to Publication Site) ● Publication site (DOI): 10.1142/S2010194512003108 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S2010194512003108 (DOI: 10.1142/S2010194512003108)
19.	Hirokazu Miyoshi, Kensho Sakamoto, Masashi Kurashina and Eiji Kanezaki : Photoinduced Electron Accumulation of Titanium Dioxide Nanoparticle Modified Electrodes, International Journal of Modern Physics: Conference Series, Vol.6, No.1, 61-66, 2012. (Link to Publication Site) ● Publication site (DOI): 10.1142/S2010194512002942 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S2010194512002942 (DOI: 10.1142/S2010194512002942)
20.	Kennichi Muranishi, Akihiro Shimamura, Masashi Kurashina and Eiji Kanezaki : Grafting interlayer MoO4 2- in Mg/Al layered double hydroxide by thermal treatment below collapsing the layered structure, International Journal of Modern Physics: Conference Series, Vol.6, No.1, 127-132, 2012. (Link to Publication Site) ● Publication site (DOI): 10.1142/S2010194512003054 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S2010194512003054 (DOI: 10.1142/S2010194512003054)
21.	Masashi Kurashina, Akio Eguchi, Eiji Kanezaki, Takuya Shiga and Hiroki Oshio : Synthesis and Properties of Cobalt and Nickel Hydroxide Nanosheets, International Journal of Modern Physics B, Vol.24, No.15n16, 2291-2296, 2010. (Keyword) Nanosheet / Cobalt hydroxide / Nickel hydroxide / atomic force microscopy / magnetism (Link to Publication Site) ● Publication site (DOI): 10.1142/S0217979210064812 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S0217979210064812 (DOI: 10.1142/S0217979210064812)
22.	Akihiro Shimamura, Masashi Kurashina and Eiji Kanezaki : Thermal behavior of phosphate intercalated Mg/Al-layered double hydroxides, International Journal of Modern Physics B, Vol.24, No.15n16, 3226-3229, 2010. (Keyword) layered double hydroxides / phosphate / thermal behavior (Link to Publication Site) ● Publication site (DOI): 10.1142/S0217979210066367 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1142/S0217979210066367 (DOI: 10.1142/S0217979210066367)
23.	Hirokazu Miyoshi, Shuhei Katayama, Masashi Kurashina and Eiji Kanezaki : Novel Accumulation of Photo-Induced MV+ Embedded in a TiO2 Shell and Discharge of Electrons to a Pt Electrode, Chemical Communications, Vol.46, No.21, 3797-3799, 2010. (Summary) After UV-irradiation of a TiO(2) shell on Pt anode was cut off, anodic current was observed continuously for some time because long-lived MV(+)* produced from MV(2+) embedded inside the shell, as a result of the electron transfer from the conduction band of the irradiated TiO(2) shell, diffused slowly and discharged to the shell thus realizing electron accumulation inside the TiO(2) shell. (Link to Publication Site) ● Publication site (DOI): 10.1039/c000262c (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 20393664 ● Search Scopus @ Elsevier (PMID): 20393664 ● Search Scopus @ Elsevier (DOI): 10.1039/c000262c (DOI: 10.1039/c000262c, PubMed: 20393664)
24.	Toshiyuki Nakaya, Kosuke Namiki, Masaki Murata, Katsuhiko Kanaizuka, Masashi Kurashina, Takako Fujita and Hiroshi Nishihara : Electronic Communication in the Mixed-valence States of Cyclobutadienecobalt Complexes having Two Ferrocenes and Two Anthraquinones, Journal of Inorganic and Organometallic Polymers and Materials, Vol.18, No.1, 124-130, 2008. (Link to Publication Site) ● Publication site (DOI): 10.1007/s10904-007-9182-8 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/s10904-007-9182-8 (DOI: 10.1007/s10904-007-9182-8)
25.	Satoshi Yamashita, Takuya Shiga, Masashi Kurashina, Masayuki Nihei, Hiroyuki Nojiri, Hiroshi Sawa, Toru Kakiuchi and Hiroki Oshio : Manganese(III,IV) and Manganese(III) Oxide Clusters Trapped by Copper(II) Complexes, Inorganic Chemistry, Vol.46, No.10, 3810-3812, 2007. (Summary) Reactions of quinquedentate Schiff base ligands with Mn and Cu ions afforded icosa- and hexadecanuclear mixed-metal clusters in which dinuclear CuII complexes trapped oxo-bridged [MnIII8MnIV4O12] and [MnIII6O6] cores, respectively. Maximum entropy method analysis for synchrotron X-ray diffraction data was used to determine the oxidation states of the Mn ions. (Link to Publication Site) ● Publication site (DOI): 10.1021/ic062258h (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 17432848 ● Search Scopus @ Elsevier (PMID): 17432848 ● Search Scopus @ Elsevier (DOI): 10.1021/ic062258h (DOI: 10.1021/ic062258h, PubMed: 17432848)
26.	Masashi Kurashina, Masaki Murata and Hiroshi Nishihara : Synthesis and Physical Properties of p-Conjugated Metallacycle Polymers of Cobalt and Ruthenium, Macromolecular Symposia, Vol.209, No.1, 141-162, 2004. (Link to Publication Site) ● Publication site (DOI): 10.1002/masy.200450510 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-4644293769 (DOI: 10.1002/masy.200450510, Elsevier: Scopus)
27.	Masashi Kurashina, Masaki Murata, Noriko Watanabe and Hiroshi Nishihara : Synthesis of Poly(biphenylene ruthenacyclopentatrienylene), a New Organometallic Conducting Polymer with Ferromagnetic Interaction in Its Reduced State, Journal of the American Chemical Society, Vol.125, No.41, 12420-12421, 2003. (Summary) A ruthenacyclopentatriene polymer 2 was synthesized by metallacycling polymerization (MCP). Polymer 2 with Mn = 3400 and Mw = 5800 consisted of identical ruthenacyclopentatriene units. The UV-vis spectra of 2 showed a shift of the pi-pi* band to a longer wavelength due to the enlargement of the pi-conjugation. Polymer 2 underwent reversible reduction due to the ruthenacycle moiety at -1.01 V versus ferrocenium/ferrocene. The EPR spectrum of the reduced form of 2 in frozen THF indicated ferromagnetic interaction of spins at ruthenacyclopentatriene units. (Link to Publication Site) ● Publication site (DOI): 10.1021/ja036934f (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 14531680 ● Search Scopus @ Elsevier (PMID): 14531680 ● Search Scopus @ Elsevier (DOI): 10.1021/ja036934f (DOI: 10.1021/ja036934f, PubMed: 14531680)
28.	Hiroshi Nishihara, Masashi Kurashina and Masaki Murata : Organometallic Conducting Polymers Synthesized by Metallacycling Polymerization, Macromolecular Symposia, Vol.196, No.1, 27-38, 2003. (Keyword) Materials Chemistry / Polymers and Plastics / Organic Chemistry / Condensed Matter Physics (Link to Publication Site) ● Publication site (DOI): 10.1002/masy.200390168 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1362262944569465600 ● Search Scopus @ Elsevier (DOI): 10.1002/masy.200390168 (DOI: 10.1002/masy.200390168, CiNii: 1362262944569465600)

Academic Paper (Unrefereed Paper):

1.	礒合俊輔, 日裏健太郎, 丹波萌, Masashi Kurashina and Mikito Yasuzawa : FABRICATION OF GLUCOSE OXIDASE-IMMOBILIZED ELECTRODE USING ELECTRODEPOSITION METHOD, 化学センサ, Vol.33, No.Supplement A, 75-77, 2017. (Summary) Glucose oxidase (GOx)-immobilized electrodes were prepared by the combination of electrodeposition and photopolymerization. Methacryloyl choline chloride (NMA) were employed as photo-polymeriable methacrylates and were added in the enzyme- electrdeposition solution, in order to be entrapped in the enzyme film. In order to investigate the enzyme film formation behavior during the electrodeposition process, quartz crystal microbalance (QCM) technique was employed. QCM measurement results indicated that the amount of deposit increased continuously up to around 15 minutes, while the decrease of deposit was observed after that time. The amount of GOx immobilized on the electrode was also measured using Amplex Red Assay Kit and showed that the decrease of deposit was parallel with the decrease of GOx on the electrode. However, the amount of enzyme on the electrode started to increase again after electrodeposition time of 40 minutes. The glucose sensor sensitivity of the obtained electrode showed a good correlation with the amount of enzyme immobilized on the electrode.

Academic Letter:

1.	Masashi Kurashina, Kato Daiki, Li Haoyuan, Shiba Keita, Morishita Yuta, Shibata Kazuki, Quyen Hong Ho and Mikito Yasuzawa : Synthesis of N-Methyl-D-Glucamine Modified Chitosan Nanofibers for Boron Adsorption, The 3rd International Conference on Nanomaterials and Advanced CompositesProceedings of NAC 2022,Springer Proceedings in Physics, Vol.298, No.chapter 4, 31-35, 2023. (Tokushima University Institutional Repository) ● Metadata: 119155 (Link to Publication Site) ● Publication site (DOI): 10.1007/978-981-99-7153-4_4 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85178519943 (Tokushima University Institutional Repository: 119155, DOI: 10.1007/978-981-99-7153-4_4, Elsevier: Scopus)

Review, Commentary:

1.	Masashi Kurashina : レーダー無機層状化合物の剥離ナノシートの複合体と機能, Chemistry and Education, Vol.64, No.9, 446-447, Sep. 2016. (Tokushima University Institutional Repository) ● Metadata: 118062 (Tokushima University Institutional Repository: 118062)
2.	Masashi Kurashina : 注目の論文 100倍に膨らむ無機層状物質, 化学, Vol.68, No.8, 61-62, Aug. 2013.

Proceeding of International Conference:

1.	Mikito Yasuzawa, Sato Yusuke, KIDO Takanari, Zhao Yumeng, Masashi Kurashina, Masao Nagase, Tomoyuki Ueki and Atsushi Tabata : Preparation of Platinum Nanoelectrodes Using Tapered Tungsten Probes and Their Application to a Single Cell Measurement, PRiME 2024 (Pacific rim meeting on electrochemisty and solid state science 2024) , Hawaii, M02-4340, Honolulu, Oct. 2024. (Summary) Platinum nanoelectrodes, which the electroactive region is located on the tip, were prepared in two steps. First, an insulating film was formed on the tapered tungsten probe by electrodeposition coating using the cationic electrodeposition paint, and then platinum nanopillars with a diameter of about 200 nm were formed on the tip using Focused-Ion-Beam Chemical-Vapor-Deposition (FIB-CVD). The conditions for forming an insulating film on tungsten surface with low thickness and excellent insulation properties were investigated and were evaluated by electrochemical measurements and SEM observations, and an appropriate insulating film was successfully produced. After the formation of a platinum pillar on the tip of an insulating film-coated tungsten probe, a platinum nanoelectrode was obtained and confirmed to function as an electrode. Using automatic micro manipulation system, repeated insertion of platinum nanoelectrode into HeLa cell was attempted. The results showed that the insertion of platinum nanoelectrodes into HeLa cells appeared to be successful.
2.	Masashi Kurashina, Kondo Shintaro, Tsuyama Tsugumi, Okabe Tomoki and Mikito Yasuzawa : Investigation of the adhesion of liquid phase exfoliated graphene to surface modified substrates, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), IE36, Tokushima, Sep. 2024. (Summary) Graphene, with its excellent electrical and mechanical properties, is expected to be applied in various fields. Liquid-phase exfoliation is a method to produce graphene with a small area but few defects. Coating the surface of the substrate with such graphene is critical for using the graphene as an electronic material. Understanding the adhesion behavior of liquid-phase exfoliated graphene to solid surfaces is essential for controlling its arrangement on substrates. In this study, we investigated how modifying substrate surfaces affects the adhesion of liquid-phase exfoliated graphene. The graphene dispersion was prepared as follows, referring to a previous report.[1] 0.1 g of kish graphite, 2.0 g of sodium dodecylbenzenesulfonate, 2.0 g of sodium chloride, and 100 mL of water were mixed, heated to reflux for 48 hours, and dried under reduced pressure. This mixture was added to ethanol and then sonicated for 3 hours. The dispersion was collected by filtering with a membrane filter (pore size: 0.45 µm), washed with water, and the particles on the filter were dispersed by sonication in water. The supernatant, which was allowed to stand for at least 7 days, was used as the liquid phase exfoliated graphene dispersion. As surface-modified substrates, gold-sputtered silicon wafers were immersed in ethanol solutions of five thiols: 6-amino-1-hexanethiol hydrochloride (AHT), 1-octadecanethiol (ODT), 10-carboxy-1-decanethiol (CDT), 4-aminobenzenethiol (ABT), benzenethiol (BT). The prepared substrates were immediately immersed in liquid phase exfoliated graphene dispersion overnight.The liquid-phase exfoliated graphene was measured by atomic force microscopy (AFM) to be about 1.5-6 nm thick. Considering that the thickness of the graphene itself is 0.3 nm, the dispersion consisted of graphene covered with dodecylbenzenesulfonate (DBS) ions on its surface, and several layers were stacked. Adhered liquid-phase exfoliated graphene was observed by AFM on substrates modified with AHT, ABT, and BT, but not on the other substrates. These results suggest that the adhesion of graphene on the substrate was due to the electrostatic interaction between the terminal amino group of the modified thiol and the sulfonic acid group of the DBS ion, and the π-π interaction between the benzene ring of the modified thiol and the benzene ring of the DBS ion. This result is expected to lead to the control of graphene alignment on substrates.[1] L. Niu et al., Nanoscale, 5(16), 7202-7208, 2013.
3.	Kido Takanari, Sato Yusuke, Masashi Kurashina, Masao Nagase and Mikito Yasuzawa : Investigation of Insulating Film Formation Method for Fabrication of Pt Nanoelectrodes for Intracellular Measurement, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PE68, Tokushima, Sep. 2024. (Summary) Establishing an electrochemical measurement method to analyze single cells would be useful for understanding and elucidating cell functions and mechanisms, while there is no electrochemical measurement system with high practical utility. One factor is that electrodes with an outer diameter of 200 nm or less are desirable to eliminate the effects of damage caused by the manipulation of electrode insertion into cells, but the fabrication technology for such devices is very limited. Recently, we are interested in microelectrode fabrication using the Focused-Ion-Beam Chemical-Vapor-Deposition (FIB-CVD) method, since it can provide nanopillar with an outer diameter of several hundred nm with controlled length. In this study, platinum nanoelectrodes, which the electroactive region is located on the tip, were prepared in three steps. Firstly, diamond-like carbon (DLC) nanopillar was formed on the tip of tapered tungsten probe using FIB-CVD. Secondary, an insulating film was formed on the tapered tungsten probe and DLC nanopillar by electrodeposition coating using the cationic electrodeposition paint ELECOAT TFY and baking. Finally, platinum nanopillar with a diameter of about 200 nm was formed on the tip of insulating film coated-DLC nanopillar using FIB-CVD. The conditions for forming an insulating film on tungsten surface with low thickness and excellent insulation properties were investigated and were evaluated by electrochemical measurements and SEM observations. It was found that a thin insulating film was successfully produced by placing the electrodeposition container in an ultrasonic cleaner and during the electrodeposition. After the formation of a platinum pillar on the tip of an insulating film-coated tungsten probe, a platinum nanoelectrode was obtained and confirmed to function as an electrode. Using automatic micro manipulation system, repeated insertion of platinum nanoelectrode into HeLa cell was attempted. References 1) S. Han et al., Biochem Biophys. Res. Commun, 2005, 332(3), 633-639
4.	Qiu ZhengWei, Masashi Kurashina, Bai Yi Meng and Mikito Yasuzawa : Synthesis of copper hydroxide nanosheet-conjugated Au/Pt nanoparticles aimed for electrode modification, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PE67, Tokushima, Sep. 2024. (Summary) The increase in atmospheric CO2 concentration is a globally important issue as it is considered to have an impact on climate change. Electrochemical reduction of CO2 to other useful compounds is one way to reduce CO2 amount. CO2 reduction is the aim of this study. First is to synthesize a suitable material for electrode. Here, we introduce a possible catalytic material, copper hydroxide nanosheet. Copper hydroxide is a very well-known material that has some potential for providing good electrochemistry ability, possibly can provide good activation area in electrochemistry. Besides, the advantage of using copper hydroxide for electrode material is that it can produce methane or ethane, which is a useful by-product on renewable energy. This can make hydroxide nanosheet a potential non-enzymatic electrode. After ion exchange of dodecylbenzenesulfonate, the crystal structure will be analyzed by XRD, to define the difference before and after ion exchange. On the other hand, Au/Pt nanoparticles bimetallic nanoparticle also had been synthesized, the advantage of the nanoparticles is it also provides wide catalytic area, so this can theoretically provide good effect on the catalytic process of electrode. So far, we have two kinds of potential nanomaterial to conduct electrochemistry, and we consider the possibility to connect these two materials to provide better electrochemistry ability.If we can conjugate these two materials together, we can possibly provide better ability on electrochemistry. Therefore, this research will be focus on the conjugation of two materials, the conjugation compound will be 3-mercapto-1-propanesulfonic acid sodium salt (MPS), which provide sulfonate and thiol functional groups bonding between copper hydroxide nanosheet and Au/Pt nanoparticles, MPS has found and shown affinity in the previous research, and sulfonate bonding in the compound may conjugate to copper hydroxide, so it was chosen to be the intermediate compound to conjugate both materials. The experiment has tried some different methods to conjugate. Different solvent dispersion methods and different mixing methods.
5.	Matsuyama Akihiro, Masashi Kurashina and Mikito Yasuzawa : Glucose Oxidation Using Electrode Modified with Nickel Hydroxide Nanosheets, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PE66, Tokushima, Sep. 2024. (Summary) Quantitative analysis of glucose is valuable in many fields, and the development of non-enzymatic glucose oxidation catalysts that do not use enzymes is highly anticipated to facilitate measurements under conditions not possible with enzymes.[1] Various metals are used as catalysts, and several examples of glucose oxidation using nanostructured nickel compounds with high electrocatalytic activity have been reported.[2] Because differences in nanostructure and composition are expected to improve catalytic performance, in this work, we synthesized nickel hydroxide nanosheets and investigated their electrochemical glucose oxidation. Nickel hydroxide nanosheets were synthesized according to a previous report.[3] A nickel acetate tetrahydrate was mixed with an ethanol-water solution and refluxed. The resulting layered nickel basic acetate was collected by centrifuge and was added to an aqueous solution of sodium dodecyl benzenesulfonate to increase the interlayer distance by ion exchange. The resulting layered nickel hydroxides were exfoliated by ultrasonication in 1-butanol and left for over a week to obtain a nanosheet dispersion. The working electrode was prepared as follows. The supernatant of the nanosheet dispersion was mixed with Ketjen black, and the mixture was concentrated under reduced pressure. Nafion or cellulose nanofibers were mixed as binder and drop cast on a φ3 mm glassy carbon (GC) electrode and dried. The electrochemical measurements of the working electrode were carried out in 0.1 M NaOH solution in a standard one-compartment cell. The cyclic voltammograms of the nanosheet-coated electrode showed an oxidation current peak caused by the oxidation of glucose at +0.6V vs. Ag/AgCl. Amperometry was measured at +0.6V vs. Ag/AgCl with continuous addition of glucose solution. The current of the nanosheet-coated electrode increased stepwise with the addition of the glucose solution. The catalytic current was almost proportional to the glucose concentration in the range of 0.09 to 1.69 mM. In the linear range, the sensitivity was 5.25 mA mM¹ cm² as determined from the slope. This value is comparable to other glucose electro-oxidation electrodes using nickel. This work demonstrated that glucose oxidation is possible using nickel hydroxide nanosheet-modified electrodes.[1] S. Y. Tee et al., Mater. Sci. Eng. C, 70, 1018-1030, 2017. [2] E. M. Almutairi et al., Arab. J. Chem., 15(1), 103467, 2022.[3] M. Kurashina et al., Int. J. Mod. Phys. B, 24(15n16), 2291-2296, 2010.
6.	Ishii Yuta, Momomoto Waka, Li Haoyuan, Masashi Kurashina, Quyen Hong Ho and Mikito Yasuzawa : Synthesis of insoluble beads of glycosylated chitosan nanofibers for boron adsorption, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PE65, Tokushima, Sep. 2024. (Summary) Boric acid is widely used in the glass industry and detergents however high concentrations of it are toxic to living organisms, so recovery technologies have been developed. Boron adsorbents, such as Amberlite IRA 743, are synthetic polymers in the main chain with ortho-polyol functional groups in the side chains. In order to reduce the environmental impact of the adsorbents, it is expected that the main chains will be converted to naturally degradable material. In our laboratory, we have developed efficient boron adsorbents based on biodegradable chitosan or chitosan nanofibers.[1, 2] In view of their industrial use, this study investigated the effect of material bead size and insolubilization on boron adsorption.The chitosan nanofiber (Sugino Machine, 2 wt%) was mixed with D-glucono-1,5-lactone and heated to reflux for 24 hours and the reaction product was concentrated under vacuum. The resulting viscous solution was dropped through a 1.75 mm diameter hole into a 1 M NaOH solution to obtain beads A with a diameter of 3 mm. Apart from that, ethylene glycol diglycidyl ether (EGDE) was mixed with the viscous solution and dropped through holes of 1.75 and 0.3 mm diameter into 1 M NaOH solution and heated at 60 °C for 24 hours to obtain beads B and C of 3 and 2.3 mm diameter, respectively. In the boron adsorption experiment, these beads were put into sodium tetraborate decahydrate solutions with different concentrations (10-400 ppm as boron) separably and shaken at 25 °C. The adsorption amount of boron was calculated from the difference of concentrations between before and after adsorption. At 24 hours reaction time, the adsorption amount of each adsorbent followed the Langmuir adsorption isotherm well. The theoretical maximum adsorption capacity of beads A, B, C, and Amberlite IRA743 were 14.1, 3.7, 4.1, and 5.6 mg g-1, respectively. Beads B and C are insoluble in HCl due to cross-linking reaction by EGDE, but the amount of adsorption decreased from A. The time to reach 90% saturation adsorption was 11 hours for bead A and 5 hours for bead C, suggesting the effect of small bead size. [1] Ho Hong Quyen, Doctoral thesis, Tokushima University, 2019. [2] M Kurashina et al., Mod. Phys. Lett. B, 36(16), 2242001, 2022.
7.	Nakano Kiichi, Zhao Yumeng, Masashi Kurashina, Atsushi Tabata, Hitoshi Matsuki and Mikito Yasuzawa : Preparation of zwitterionic polymer brush surface using optical ATRP method and its inhibitory effect on protein adsorption, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PE59, Tokushima, Sep. 2024. (Summary) Medical devices that are implanted in the body are subject to adsorption reactions of various components, such as proteins and blood cells, by the body's immune defense system. Therefore, it is essential for medical devices that come into contact with bodily fluids to have a surface that inhibits the adsorption of proteins such as fibrinogen, which occurs in the early stages of the immune response. For this purpose, materials with the ability to retain water are considered useful, and polymers such as sulfobetaine methacrylate (SBMA) and phosphorylcholine methacrylate (MPC), which are zwitterionic polymers, are used [1]. On the other hand, the surface-initiated atom transfer radical polymerization (SI-ATRP) method is interesting because it can form dense polymer brushes (PB) on the substrate surface, and furthermore, photo-ATRP, in which the catalyst is regenerated by UV irradiation, can be fabricated in a simple environment because it proceeds even in the presence of oxygen [2]. In this study, zwitterionic PB was prepared on the substrate surface using Photo-ATRP. SBMA and methacrylate 2-(methacryloyloxy)ethyl choline hydrogen phosphate (MCHP), a novel phosphobetaine methacrylate in which the polar groups of MPC is reversed, were used as zwitterionic monomers. Quartz crystal with SiO2 surface (QCM-SiO2) was used as substrate and fibrinogen adsorption behavior was evaluated using the flow quartz crystal microbalance system. Successful PB modification of SBMA and MCHP on QCM-SiO2 were confirmed by XPS. PBS containing fibrinogen was flowed through the system and the change in mass per unit area of the modified surface was measured. The unmodified SiO2 cell adsorbed 240 ng/cm2, while the SBMA-PB-modified surface adsorbed 118 ng/cm2 and the MCHP-PB-modified surface 20 ng/cm2. Thus, protein adsorption was significantly inhibited by both PB modifications, but the inhibitory effect of MCHP-PB modification was superior to that of SBMA-PB modification. [1] S. Nishimura et al., Bull. Chem. Soc. Jpn. 96, 1052 (2023) [2] W.-Q. Yan et al., Macromolecules 53, 8, 2801 (2020)
8.	Tsai YuanChih, SHIMAHARA Hisui, Zhao Yumeng, Nakano Kiichi, Masashi Kurashina, Atsushi Tabata, Hitoshi Matsuki, Mikito Yasuzawa and Bai MengYi : The in vitro evaluations of photo-curing 2-(methacryloyloxy)ethyl choline hydrogen phosphate bio-printing scaffold, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PE58, Tokushima, Sep. 2024. (Summary) Patients who require tooth extraction due to trauma, severe periodontal disease, or caries often have the bone defect repaired before receiving future restorations or dental implants. However, such procedures frequently need the use of bone graft powder and/or other materials to promote bone cell proliferation and prevent epithelial cells from migrating prematurely into the defect, putting physicians' skills and techniques to the test. Medical imaging and bioprinting technologies enable the customization of bone scaffolds prior to surgery, which is anticipated to reduce the surgery time and help with estimating the quantity of implant material necessary. 2-methacryloyloxyethyl phosphorylcholine (MPC) is a biocompatible phosphocholine structure with minimal cytotoxicity. Based on the abovementioned features, we further modified its structures to synthesize a novel chemical, i.e., 2-(methacryloyloxy)ethyl choline hydrogen phosphate (MCHP), which phosphocholine structure is translocated, allowing for a wider range of uses. In this study, we combined this material with calcium triphosphate and a photoinitiator to produce a photocurable bioink. In vitro investigations using various bioinks with varying formula ratios revealed that this material is also showing biocompatible and has no significant cytotoxic properties toward cell lines. It also demonstrated a plausible microenvironment for cultured osteoblasts (OB) to differentiation growth, indicating promise for bone regeneration and therapeutic uses in patients with bone abnormalities in the future.
9.	Zhao Yumeng, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : Introducing Biocompatibility into Polypropylene Implant Devices Using 2-(Methacryloyloxy)ethyl Choline Hydrogen Phosphate Copolymers, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PE57, Tokushima, Sep. 2024. (Summary) To improve the biocompatibility of hydrocarbon-based implanted materials, we conducted a study using a novel zwitterionic copolymer to modify the surface of polypropylene (PP) substrates. This modification aimed to decrease protein adsorption, a crucial initial phase of physiological reactions that significantly influences subsequent biological responses. 2-methacryloyloxyethyl phosphorylcholine (MPC) is widely used for medical device surface modification to prevent protein adsorption and platelet adhesion. In our previous research, we have synthesized 2-(methacryloyloxy)ethyl choline hydrogen phosphate (MCHP), in which the order of polar groups is reversed from that of MPC, and applied them to material surface modification. Unlike MPC, MCHP-modified surfaces maintained higher hydrophilicity even in acidic environments. Earlier studies demonstrated that block copolymers with controlled chain orientation, consisting of 70% n-butyl methacrylate (BMA) and 30% MPC units, provided water insoluble copolymers with excellent blood compatibility. To optimize the biocompatibility and stability of MCHP, we synthesized di-block copolymers with varying ratios of BMA and MCHP units and investigated the optimal synthesis conditions. In this study, MCHP and BMA block polymers were synthesized using the RAFT polymerization method. By controlling the polymerization time, we adjusted the chain lengths of MCHP and BMA and determined the monomer ratios in the polymers through molecular weight measurements. These block polymers were then used to modify PP substrates via hydrophobic interactions, and their modification stability and biocompatibility were evaluated. The experimental results revealed that a block polymer with a MCHP to BMA ratio of 2:8 provided high stability and biocompatibility on the modified surface. Compared to the optimal 3:7 ratio for MPC and BMA block polymers, MCHP required a longer hydrophobic chain to maintain stability due to its higher hydrophilicity. Nevertheless, the MCHP-modified surface retained biocompatibility with a shorter zwitterionic chain. In summary, our study demonstrates that MCHP-based block copolymers modification can effectively introduce the biocompatibility of PP substrates, providing a promising approach for improving the performance of implanted materials.
10.	Shimahara Hisui, Zhao Yumeng, Nakano Kiichi, Tsai YuanChih, Masashi Kurashina, Antonio Norio Nakagaito, Bai MengYi and Mikito Yasuzawa : Synthesizing composite materials using zwitterionic polymers and tricalcium phosphate, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PE56, Tokushima, Sep. 2024. (Summary) As the population ages, bone-related diseases such as osteoporosis, bone cancer, and bone tumors are rapidly increasing. This has led to the current need for bone replacement and bone regeneration [1]. Bone is a multiphase material made of collagen matrix and mineral crystals. The collagen matrix provides toughness, while the mineral crystals give bone its rigidity [2]. Therefore, a composite material combining organic and inorganic components was considered to fill bone defects. Calcium phosphate (CaP) biomaterials are widely used as an alternative to autogenous bone grafts [3]. On the other hand, the zwitterionic methacrylate 2-(methacryloyloxy)ethyl choline hydrogen phosphate (MCHP) has high biocompatibility and is thought to have a high affinity with CaP-based materials due to its terminal phosphate group. In addition, as MCHP is a methacrylate, light irradiation of the mixtures of MCHP and CaP are expected to allow for the formation of moldings to compensate for bone defects. In this study, a mixture of tricalcium phosphate (TCP) and MCHP, which is considered to be easily absorbed by bone among Caps, was prepared. MCHP and TCP were mixed in Milli-Q water in the weight ratio MCHP : TCP = 3 : 7, 4 : 6, 5 : 5, and a photoinitiator was added to obtain a paste-like mixture. The mixture was placed in a mold and photo-irradiated with a xenon flashlamp to obtain a solid product. Each sample was named MCP-TCP37, MCP-TCP46, and MCP-TCP55 according to its weight ratio.All of the composite solids obtained absorbed water and swelled. The magnitude of swelling was in the order of MCP-TCP37, MCP-TCP46, and MCP-TCP55MCP, indicating that the higher the percentage of MCP, the greater the swelling.The MCHP elution from the composite solids and the physical properties of the composite solids were also investigated.Keywords: Composite materials; Scaffold; Zwitterionic polymers; Tricalcium phosphate. [1] M. M. Zerankeshi, et al., Ceram. Int. 48, 2264722663 (2022) [2] Charles H. Turner. Ann. N.Y. Acad. Sci. 1068: 429446 (2006)[3] C. Schopper, et al., J. Biomed. Mater. Res. Part B: Appl. Biomater. 74B, 458467 (2005)
11.	Nishimura Kaito, Masashi Kurashina and Mikito Yasuzawa : Improved reproducibility of glucose oxidation of copper hydroxide nanosheet-modified electrode with polyurethane coatings, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PB30, Tokushima, Sep. 2024. (Summary) Quantitative analysis of glucose is used in various fields. Compared to precious metals (Pt, Au, etc.), the transition metal Cu is inexpensive, and sensors using copper-based compounds are known to exhibit excellent catalytic properties and stability, making them promising candidates for non-enzymatic electrodes.[1] In our laboratory, we have synthesized copper hydroxide nanosheets, which catalyze the electrolytic oxidation of glucose.[2] However, this electrode was unstable during repeated measurements. In this study, the reproducibility of the electrode was improved by coating it with polyurethane. The working electrode was prepared as follows. The copper hydroxide nanosheets dispersion in 1-butanol were prepared according to the previous report.[2] Ketjen black was mixed with the dispersion of copper hydroxide nanosheets and this mixture was cast onto the surface of a disk electrode and dried. Then DMF and THF solution of polyurethane was cast over it as a protective layer. Electrochemical measurements of this working electrode were carried out in a standard one-compartment cell equipped with a platinum wire counter electrode and an Ag/AgCl reference electrode in 0.1 M NaOH solution. Amperometry was measured at +0.55 V vs. Ag/AgCl with continuous addition of glucose solution. The electrodes without the polyurethane cover showed a current response only during the first measurement, with almost no response in subsequent measurements. Electrodes covered with polyurethane were capable of multiple measurements, although the amount of current varied because the amount of polyurethane covered was not constant. For the one electrode with the polyurethane cover, the sensitivity in the first measurement was 27.4 mA mM-1 cm-2, and from the second to the sixth measurements, the sensitivity gradually decreased from 63.1 mA mM-1 cm-2 to 50.5 mA mM-1 cm-2. For the other electrode with the polyurethane cover, the results showed that the values gradually decreased from 104.8 mA mM-1 cm-2 to 14.4 mA mM-1 cm-2 over the ten measurements. The electrodes were left in the electrolyte solution for one day and the eleventh measurement yielded a value of 7.4 mA mM-1 cm-2. These results show that using polyurethane as a protective layer significantly improves the stability of the electrodes during multiple measurements.[1] Z. Amirzadeh et al., Synth. Met., 245, 160-166, 2018.[2] M. Kurashina et al., ESC Trans., 86(15), 23-26, 2018.
12.	Tomisaka Yuzuki, Masashi Kurashina, Bai MengYi and Mikito Yasuzawa : Carbon Dioxide Reduction using Copper Hydroxide Nanosheet Modified Electrode, International Conference on Advanced Materials Development and Performance 2024 (AMDP 2024), PB29, Tokushima, Sep. 2024. (Summary) Electrochemical reduction of carbon dioxide using transition metal catalysts can produce carbon monoxide and formic acid, both of which are used in large quantities around the world. Copper is the only catalyst that can produce industrially useful ethylene, in addition to these products, but it also produces other products. Since product selectivity is affected by the structure of the catalyst, the development of novel nanostructured copper catalysts is expected. In our laboratory, we have synthesized copper hydroxide nanosheets by introducing long-chain alkyls to the interlayer of basic copper acetate to expand the basal spacing and disperse them in 1-butanol. When applied to electrode modification, the nanosheets were found to be capable of electrolytic oxidation of glucose.[1] In this study, we investigate the reduction of carbon dioxide at electrodes using copper hydroxide nanosheets. Layered basic copper acetate Cu2(OH)3(CH3COO)·H2O was synthesized as previously reported.[2] This compound was reacted with sodium oleate aqueous solution at 30 °C for one day, collected by centrifugation. X-ray diffraction showed that the basal spacing of Cu2(OH)3(CH3COO)·H2O was 0.93 nm but expanded to 3.29 nm after the reaction, indicating that the interlayer acetate ions were exchanged for oleate ions. The ion exchanger was dispersed in 1-butanol at a ratio of 1.0 mg/mL to obtain the nanosheet dispersion. The dispersion was dropped onto a glassy carbon (GC) electrode and dried to prepare a working electrode. Cyclic voltammetry (CV) was measured using this as the working electrode in 0.5 M sodium hydroxide aqueous solution as the electrolyte with an Ag/AgCl electrode as the reference electrode and a platinum wire as the counter electrode, and the potential was swept from the open circuit potential to -1.2 V vs. Ag/AgCl. The CV was measured before and after carbon dioxide bubbling. No significant peak was observed before bubbling, but after carbon dioxide bubbling, a reduction current peak was observed at 1.0 V, which is considered to be the reduction peak of carbon dioxide. When carbon dioxide was blown in again, it did not react. We are in the process of studying the continuing electrolytic reduction of carbon dioxide.[1] M. Kurashina et al., ESC Trans., 86(15), 23-26, 2018.[2] K. Sotowa et al., Applied Mechanics and Materials, 625, 201-204, 2014.
13.	Mikito Yasuzawa, Zhao Yumeng, Nakano Kiichi, Tsai YuanChih, Masashi Kurashina, Hitoshi Matsuki, Bai Meng-Yi, Anzai Takao, Liu Yihua and Abe Yoshihiko : An Innovative Approach to Enhancing Biocompatibility of Metal Surfaces, 12th World Biomaterials Congress (WBC 2024), OS4-10-3, Daegu, May 2024. (Summary) Medical devices such as stents and ventricular assist devices, which are in direct contact with blood, must have excellent biocompatibility on the device surface, since fibrinogen and platelets can be adsorbed and thrombi can be formed. For this purpose, it is considered useful to coat the surface with a material having zwitterionic ions that express high hydrophilicity. However, since methacrylate polymers with zwitterionic ions are water-soluble, stable surface modification is achieved by forming and fixing chemical bonds to the surface, or by synthesizing water-insoluble copolymers with hydrophobic methacrylate and coating them. On the other hand, we have recently developed a new compound, 2-((2-(methacryloyloxy)ethyl)dimethylammonio)ethyl hydrogen phosphate (MCHP), in which the order of the positively charged quaternary amine portion and the negatively charged phosphoric acid portion of the polar group of 2-methacryloyloxyethylphosphorylcholine (MPC) is reversed, and was confirmed that biocompatibility can be introduced by using the obtained polymer. MCHP has a phosphoric acid group at its terminus, which may form bonds to stainless steel and Nitinol surfaces, and thus can be stably modified. In this study, we attempted to form biocompatible surfaces by immersing samples of stainless steel and Nitinol in an aqueous solution of a single polymer of MCHP polymer and then rinsing them with water. As a result, excellent biocompatibility was formed on both samples, and the biocompatibility was maintained even after prolonged immersion in saline solution. In the same way, when the Nitinol stent was treated with MCHP polymer coating and blood circulation experiments were conducted, the untreated sample showed significant platelet adhesion, whereas the MCHPpolymer treated sample showed very little platelet and thrombus adhesion, confirming anti-thrombogenic properties equivalent to the commercially available treatment method.
14.	Tsai YuanChih, SHIMAHARA Hisui, NAKANO Kiichi, Masashi Kurashina, Antonio Norio Nakagaito, Bai Meng-Yi, Hitoshi Matsuki, Bai MengYi and Mikito Yasuzawa : Preparation of bio-printing scaffold using 2-(methacryloyloxy)ethyl cholinephosphate, 12th World Biomaterials Congress (WBC 2024), P2-086, Daegu, May 2024. (Summary) Reconstruction procedures for patients afflicted with bone abnormalities resulting from maxillofacial trauma and periodontal disease frequently necessitate the utilization of bone powder and bone regeneration materials. The surgical procedure is complicated and takes a significant amount of time. Bio-printing, a significant technique within the field of tissue engineering, possesses the capability to fabricate personalized regeneration graft utilizing preoperative images. Moreover, it has the potential to alleviate challenges encountered by surgeons during surgical procedures. Recently, we have succeeded tosynthesize 2-(methacryloyloxy)ethylcholine phosphate (MCP), in which 2-methacryloyloxyethyl phosphorylcholine (MPC)polar groups order is reversed. Since MCP has phosphoric acid as a terminal group, MCP and its polymers have a negative charge even in the acidic region and show excellent biocompatibility in wide pH range. In addition, MCP has unique adsorption characteristics not found in MPC. The bioink formulation involved the combination of MCP and calcium triphosphate, followed by the incorporation of a photoinitiator to yield a compound capable of undergoing curing through exposure to ultraviolet (UV) radiation. The bio-printer was utilized proficiently in the fabrication of the scaffold's structure, which subsequently underwent a curing process that rendered it insoluble property. It is expected that this technique will possess potential uses in the field of bone regeneration and in the therapeutic intervention for individuals with craniofacial injuries.
15.	YUMENG ZHAO, NAKANO Kiichi, Tsai YuanChih, Masashi Kurashina, Hitoshi Matsuki, Bai Meng-Yi and Mikito Yasuzawa : Preparation of biocompatible surface using a new phospholipid analogue polymer, 12th World Biomaterials Congress (WBC 2024), P1-037, Daegu, May 2024. (Summary) Zwitterionic polymer coatings on biomedical devices are considered an effective and promising way to improve the biocompatibility of materials and reduce the secondary damage that implanted materials can cause to the human body. Polymers prepared from the zwitterionic monomer 2-methacryloyloxyethyl phosphorylcholine (MPC) have been widely commercialized for this purpose. However, our recent studies have shown that MPC polymers become positively charged at low pH, and their biocompatibility decreases with decreasing hydrophilicity. It is well known that under conditions such as inflammation, the local environment within the human body decreases to acidic levels. Therefore, it is desirable for devices implanted in the body to show high biocompatibility even in acidic regions. On the other hand, we have recently succeeded to synthesize 2-(methacryloyloxy) acetylcholine phosphate (MCP), in which the order of MPC and the positively charged quaternary amine moiety and the negatively charged phosphoric acid moiety are reversed. Since MCP has phosphoric acid as a terminal group, MCP and its polymers are expected to have a negative charge in the acidic region and exhibit excellent biocompatibility. In this study, MCP polymer modification such as MCP polymer brush formation using SI-ATRP was employed, and protein adsorption tests were performed in different pH region. MPC polymer modified samples were prepared in a similar manner and compared. As a result, no significant difference was observed between MCP and MPC in the protein adsorption test in the neutral region, but a clear difference was observed in the acidic region, confirming that the modified surface obtained with MCP is superior. The modified surface obtained with MCP showed no decrease in hydrophilicity in the acidic region.
16.	Bai Meng-Yi, Masashi Kurashina, Qiu Zheng-Wei, Tomisaka Yuzuki and Mikito Yasuzawa : Electrochemical Reduction of CO2 using Au@Pt Nanoparticle and Copper Hydroxide Nanosheet Electrode, GoldPlatinum Bimetallic Nanoparticles-decorated Copper hydroxide nanosheets Boosts Carbon Dioxide Reduction to Industrial Chemicals: An Electrochemical Way of Conversion, The 10th International Forum on Advanced Technologies (IFAT 2024), 12-16, Tokushima, Mar. 2024.
17.	NAKANO Kiichi, YUMENG ZHAO, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : Evaluation of nonspecific adsorption-suppressed surface prepared using Photo-ATRP, 4th International Conference on Nanomaterials and Advanced Composites (NAC 2023) Abstract Booklet & Event Agenda, 122, Busan, Nov. 2023.
18.	Zhao Yumeng, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : Preparation and Biocompatibility Evaluation of the Surface Modified with 2-Methacryloyloxyethyl Choline Phosphate, 4th International Conference on Nanomaterials and Advanced Composites (NAC 2023) Abstract Booklet & Event Agenda, 112, Busan, Nov. 2023.
19.	Masashi Kurashina, Qiu Zheng-Wei, Mikito Yasuzawa and Bai Meng-Yi : Electrochemical Reduction of CO2 using Au@Pt Nanoparticle and Layered Copper Hydroxide Electrode, 4th International Conference on Nanomaterials and Advanced Composites (NAC 2023) Abstract Booklet & Event Agenda, 37, Busan, Nov. 2023.
20.	Zhao Yumeng, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : Preparation and Biocompatibility Evaluation of the Surface Modified with Zwitterionic Polymer, the 3rd International Conference on Nanomaterials and Advanced Composites, Tokushima, Jul. 2022.
21.	Haruka Tsubohira, Hiroki Ishikawa, Fumiaki Suzuka, Masashi Kurashina and Mikito Yasuzawa : Improvement of Reproducibility of Glucose Oxidation Electrode Using Copper Hydroxide Nanosheets, the 3rd International Conference on Nanomaterials and Advanced Composites, Tokushima, Jul. 2022.
22.	Masashi Kurashina, Daiki Kato, LI HAOYUAN, Keita Shiba, Yuta Morishita, Kazuki Shibata, Quyen Hong Ho and Mikito Yasuzawa : Synthesis of N-methyl-D-glucamine Modified Chitosan Nanofibers for Boron Adsorption, the 3rd International Conference on Nanomaterials and Advanced Composites, Tokushima, Jul. 2022.
23.	QUYEN HONG HO, Masashi Kurashina and Mikito Yasuzawa : Removal of Phosphate from Aqueous Solution by Using Thermally Modified Clamshell, International Conference on Advanced Materials Development and Performance 2021, Dalian, Oct. 2021.
24.	Masashi Kurashina, LI HAOYUAN, Quyen Hong Ho and Mikito Yasuzawa : Synthesis of glycosylated chitosan nanofibers for boron adsorption, International Conference on Advanced Materials Development and Performance 2021, Dalian, Oct. 2021.
25.	Zhao Yumeng, Tsubasa Miki, Toshiki Nakao, Masashi Kurashina, Yukihiro Arakawa, Yasushi Imada, Keiji Minagawa, Hitoshi Matsuki and Mikito Yasuzawa : Preparation of Biocompatible Surface Using Zwitterionic Polymer, 6th International Forum on Advanced Technologies, Tokushima, Mar. 2020.
26.	Shigeru Sugiyama, Kenji Wakisaka, Kenta Imanishi, Masashi Kurashina, Naohiro Shimoda, Masahiro Katoh and Jhy-Chern Liu : Recovery of Phosphate Rock Equivalents from Incineration Ash of Chicken Manure by Elution-precipitation Treatment, The 18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019), Vol.52, No.9, 778-782, Sapporo, Sep. 2019. (Summary) In order to obtain calcium phosphates - a phosphate rock equivalent - from the incineration ash of chicken manure, which is obtained from power generation systems that use the manure for fuel, incineration ash was treated with an aqueous solution of nitric acid to elute phosphorus. By using 0.3 M of HNO3, most of the phosphorus could be eluted from 1.0 g of ash within 0.1 h. Compared with the composted chicken manure that was previously examined in our laboratory, the concentration of HNO3 was increased for this session of elution. Using the incineration ash of chicken manure made it possible to remove inorganic species at a lower boiling or sublimation temperature, and organic species by calcination in the power generation system. Compared with composted chicken manure, the concentrations of phosphorus contained in the incineration ash and the nitric acid extract were higher in the incineration ash. XRD analysis showed that the obtained nitric acid extract could be treated with aqueous NH3 to form a precipitation of poorly-crystallized calcium hydroxyapatite (Ca10(PO4)6(OH)2), which is one of main components in phosphate rock. In order to confirm the formation and purity of calcium phosphate species, the precipitation calcination was conducted at 1,078 K for 5 h. XRD revealed that the calcined solid was tricalcium phosphate, and no contamination was evident. These results reveal that a phosphate rock equivalent could be easily obtained from the incineration ash of chicken manure, which means that approximately 14% of the phosphate rock that is currently being imported into Japan could be replaced by this product. (Keyword) Incineration ash / Chicken manure / Recovery of phosphorus / Phosphate rock equivalent (Link to Publication Site) ● Publication site (DOI): 10.1252/jcej.19we030 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85076244800 (DOI: 10.1252/jcej.19we030, Elsevier: Scopus)
27.	Mikito Yasuzawa, Jhong Huan-Ping, Masashi Kurashina, Chen-Hao Wang and Wei-Hung Chiang : Glucose Sensor Prepared By the Immobilization of Glucose Oxidase Together with Nanocarbons and Prussian Blue By Electrodeposition Procedure, 235th ECS Meeting, Dallas, May 2019.
28.	Mikito Yasuzawa, Jhong Huan-Ping, Masashi Kurashina, Chen-Hao Wang and Wei-Hung Chiang : Fabrication of Glucose Sensors Prepared by the Electrodeposition of Glucose Oxidase and Nanomaterials, 5th International Forum on Advanced Technologies, Taipei, Mar. 2019.
29.	Ono Ryosuke, Masashi Kurashina, Mikito Yasuzawa, Yasuhide Ohno and Masao Nagase : Fabrication of Nanopillars Using Focus Ion Beam-Chemical Vapor Deposition Method, 5th International Forum on Advanced Technologies, Taipei, Mar. 2019.
30.	Masashi Kurashina, Suzuka Fumiaki and Mikito Yasuzawa : Electrochemical Oxidation of Glucose Using Copper Hydroxide Nanosheets, Americas International Meeting on Electrochemistry and Solid State Science (AiMES 2018), Cancun, Oct. 2018.
31.	Mikito Yasuzawa, Nakataki Shinsaku, Li Jiang, Masashi Kurashina and Harada Toshihiko : Sensitivity Improvement of a Low-Invasive Type Amperometric Glucose Sensor, Americas International Meeting on Electrochemistry and Solid State Science (AiMES 2018), Cancun, Oct. 2018.
32.	Mikito Yasuzawa, Masahiro Uchimaru, Jhong Huan-Ping, Masashi Kurashina, Chen-Hao Wang, Yusuke Fuchiwaki and Toshihiko Harada : Electrodeposition of Both Carbon Nanotube and Glucose Oxidase on Pt Electrode Using a Dispersed Electrolytic Solution, 233rd ECS Meeting, Seattle, May 2018.
33.	Jhong Huan-Ping, Masahiro Uchimaru, Shunsuke Isoai, Masashi Kurashina, Mikito Yasuzawa, Chen-Hao Wang, Wei-Hung Chiang, Yusuke Fuchiwaki and Toshihiko Harada : Immobilization of Nanocarbons and Glucose Oxidase by Electrodeposition Method for Glucose Sensor Fabrication, 22nd Topical Meeting of the International Society of Electrochemistry, Tokyo, Apr. 2018.
34.	Quyen Hong Ho, Maki Yoshioka, Thuy Thi Xuan Le, Masashi Kurashina and Mikito Yasuzawa : Effective Phosphate Removal from Aqueous Solution Using Environmental-Friendly Adsorbent'', 4th International Forum on Advanced Technologies, Tokushima, Mar. 2018.
35.	Jhong Huan-Ping, Mikito Yasuzawa, Masashi Kurashina, Masahiro Uchimaru, Chen-Hao Wang and Wei-Hung Chiang : Immobilization of Enzyme by Modifying with Detergent and Polymer in Glucose Biosensor Detection, 4th International Forum on Advanced Technologies, Tokushima, Mar. 2018.
36.	Mikito Yasuzawa, Shinsaku Nakataki, Toshihiko Harada, Jiang Li, Yusuke Fuchiwaki and Masashi Kurashina : Low invasive biosensor for continuous glucose monitoring, International Conference on Advanced Materials Development and Performance 2017, Pune, Jul. 2017.
37.	Masashi Kurashina, Daiki Ikeuchi, Masaki Ohara, Toshio Takayanagi and Mikito Yasuzawa : Syntheses and Properties of Copper Hydroxide Nanosheets and Controlled Deposition, International Conference on Advanced Materials Development and Performance 2017, Pune, Jul. 2017.
38.	Quyen Hong Ho, Maki Yoshioka, Thuy Thi Xuan Le, Masashi Kurashina and Mikito Yasuzawa : Eco-Friendly Removal of Phosphate from Aqueous Solution Using Natural Dietary Fibers and Minerals, International Conference on Advanced Materials Development and Performance 2017, Pune, Jul. 2017.
39.	Mikito Yasuzawa, Daisuke Mima, Shunsuke Isoai, Masashi Kurashina, Yusuke Fuchiwaki and Toshihiko Harada : Preparation of Enzyme-Immobilized Film Using Cellulose Nanofibers, 3rd International Forum on Advanced Technologies, 花蓮, Mar. 2017.
40.	Masashi Kurashina, Yuki Ogawa and Eiji Kanezaki : Effect of aging method on adsorption and elution of phosphate in Mg/Fe layered double hydroxide, Pacifichem 2015, Honolulu, Dec. 2015.
41.	Yuki Ogawa, Masashi Kurashina, Eiji Kanezaki and Takashi Yamamoto : Effect of aging method on adsorption and elution of phosphate in Mg/Fe layered double hydroxide, International Conference on Advanced Materials Development and Performance 2014, Busan, Jul. 2014.
42.	Masashi Kurashina, Tatsuki Inoue, Chihiro Tajima and Eiji Kanezaki : Removal of borate by coprecipitation with Mg/Al layered double hydroxide, International Conference on Advanced Materials Development and Performance 2014, Busan, Jul. 2014.
43.	Takahiro Togawa, Ken-Ichiro Sotowa, Masashi Kurashina, Toshihide Horikawa and Jesus Rafael Alcantara Avila : Basic Copper Acetate Synthesis using a Microchannel-Assisted Crystallizer, Joint Congress of ACTS-2014 and CGOM11, Nara, Jun. 2014.
44.	Ken-Ichiro Sotowa, Takahiro Togawa, Yuika Shimizu, Masashi Kurashina, Toshihide Horikawa and Jesus Rafael Alcantara Avila : Effect of Mixing Methods on the Precipitation of Basic Copper Acetate, International Conference on Process Engineering and Advanced Materials 2014, Kuala Lumpur, Jun. 2014.
45.	Masashi Kurashina : Removal of oxyanions by use of layered double hydroxides, Bilateral Research Symposium, Auckland, Oct. 2012.
46.	Masashi Kurashina, Yuuji Taketa, Eri Yasui, Hirohumi Kujime, Akio Eguchi and Eiji Kanezaki : Assembly of Nickel and Cobalt Hydroxide Nanosheets by Stacking, International Conference on Emerging Advanced Nanomaterials (ICEAN) 2012, Brisbane, Oct. 2012.
47.	Masashi Kurashina, Tomohiro Amatsu, Takaaki Ochi, Nozomi Ohigashi and Eiji Kanezaki : Elution Behavior of Phosphate Contained in Mg/Fe and Zn/Fe Layered Double Hydroxides, International Conference on Advanced Materials Development and Performance 2011, Tokushima, Jul. 2011.
48.	Hirokazu Miyoshi, Kensho Sakamoto, Masashi Kurashina and Eiji Kanezaki : Photo-induced Electron Accumulation of Titanium Dioxide Nanoparticle Modified Electrodes, International Conference on Advanced Materials Development and Performance 2011, Tokushima, Jul. 2011.
49.	Kennichi Muranishi, Akihiro Shimamura, Masashi Kurashina and Eiji Kanezaki : Grafting interlayer MoO4 2- in Mg/Al layered double hydroxide by thermal treatment below collapsing the layered structure, International Conference on Advanced Materials Development and Performance 2011, Tokushima, Jul. 2011.
50.	Hatsuko Hamaguchi, Masashi Kurashina, Toshihiro Moriga and Eiji Kanezaki : Composites of magnetic material and photocatalyst for water treatment, International Conference on Advanced Materials Development and Performance 2008, Beijing, Oct. 2008.
51.	Akihiro Shimamura, Masashi Kurashina and Eiji Kanezaki : Thermal Behavior of Phosphate Intercalated Mg/Al-Layered Double Hydroxides, International Conference on Advanced Materials Development and Performance 2008, Beijing, Oct. 2008.
52.	Yuichi Kamo, Masashi Kurashina and Eiji Kanezaki : Intercalation and De-intercalation of [Cu(EDTMP)]3- in Mg/Al-Layered Double Hydroxide, International Conference on Advanced Materials Development and Performance 2008, Beijing, Oct. 2008.
53.	Masashi Kurashina, Akio Eguchi, Eiji Kanezaki, Takuya Shiga and Hiroki Oshio : Syntheses and Properties of Cobalt and Nickel Hydroxide Nanosheets, International Conference on Advanced Materials Development and Performance 2008, Beijing, Oct. 2008.

Proceeding of Domestic Conference:

1.	YUMENG ZHAO, NAKANO Kiichi, Masashi Kurashina, Atsushi Tabata, Hitoshi Matsuki and Mikito Yasuzawa : Preparation of biocompatible surface using a new phosphobetaine monomer, 日本バイオマテリアル学会シンポジウム2024, 2P-002, Oct. 2024.
2.	Yusuke Sato, Kazuki Hashimoto, Masashi Kurashina, Masao Nagase and Mikito Yasuzawa : タングステンプローブを用いた白金ナノ電極の作製法の検討, 2023年度日本化学会中国四国支部大会, Nov. 2023.
3.	NAKANO Kiichi, YUMENG ZHAO, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : Photo-ATRPを用いた双性イオンポリマーブラシの合成, 2023年度日本化学会中国四国支部大会, Nov. 2023.
4.	Tomoki Kubo, Ryusei Shinomiya, Masashi Kurashina and Mikito Yasuzawa : 三酸化アンチモン粉末の表面改質による疎水性媒体中における分散性の向上, 2022年度日本化学会中国四国支部大会, Nov. 2022.
5.	Kazuki Hashimoto, Atsushi Ikenoue, Mikito Yasuzawa, Masashi Kurashina and Masao Nagase : FIB-CVD法を用いた安定なナノピラーの作製および細胞挿入の検討, 2022年度日本化学会中国四国支部大会, Nov. 2022.
6.	Takeru Terauchi, Takuya Yamamoto, Tomoya Yoshikawa, Masashi Kurashina and Mikito Yasuzawa : キトサンナノファイバーを酵素固定膜として用いた微細針状グルコースセンサの作製とその評価, 2022年度日本化学会中国四国支部大会, Nov. 2022.
7.	Shoya Kyokawa, Rina Ikeda, YUMENG ZHAO, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : ホスホリルコリン基を有する新規ポリマーの合成及び生体適合性評価, 2022年度日本化学会中国四国支部大会, Nov. 2022.
8.	Yumeng Zhao, Rina Ikeda, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : Biocompatibility Evaluation of Surafce Prepared Using 2-Methacryloyloxyethyl Choline Phosphate, 13th Annual Meeting of Chugoku/Shikoku Branch in the Biophysical Society of Japan, May 2022.
9.	中尾俊樹, Masaki GOTO, Masashi Kurashina, Nobutake Tamai, Mikito Yasuzawa and Hitoshi Matsuki : ホスファチジルコリン二重膜におよぼす疎水鎖結合様式の影響, 第59回生物物理学会年会, Nov. 2021.
10.	中尾俊樹, Masaki GOTO, Masashi Kurashina, Nobutake Tamai, Mikito Yasuzawa and Hitoshi Matsuki : グリセロ-スフィンゴ混合型非天然リン脂質の二分子膜相転移, 第35回九州コロイドコロキウム, Sep. 2021.
11.	中尾俊樹, Masaki GOTO, Masashi Kurashina, Nobutake Tamai, Mikito Yasuzawa and Hitoshi Matsuki : モジュール構造変更アナログ脂質の合成と二重膜物性, 日本膜学会第43年会, Jun. 2021.
12.	久次米昭宏, Tsubasa MIki, Masashi Kurashina and Mikito Yasuzawa : 生体適合性双性イオンポリマーを用いたコポリマーの作製およびその機能性評価, 日本生物物理学会第12回中国四国支部大会, May 2021.
13.	Haoyuan Li, Quyen Hong Ho, Masashi Kurashina and Mikito Yasuzawa : Synthesis of N-glucosylated chitosan nanofiber for boron adsorbent, 12th Annual Meeting of Chugoku/Shikoku Branch in the Biophysical Society of Japan, May 2021.
14.	Yumeng Zhao, Toshiki Nakao, Tsubasa MIki, Masashi Kurashina, Hitoshi Matsuki and Mikito Yasuzawa : Preparation of Biocompatible Surface Using Zwitterionic Polymer, 12th Annual Meeting of Chugoku/Shikoku Branch in the Biophysical Society of Japan, May 2021.
15.	Toshiki Nakao, Masaki GOTO, Masashi Kurashina, Nobutake Tamai, Mikito Yasuzawa and Hitoshi Matsuki : Organic Synthesis and Bilayer Properties of a Sphingolipid Analog, an Amide-Linked Phosphatidylcholine, 12th Annual Meeting of Chugoku/Shikoku Branch in the Biophysical Society of Japan, May 2021.
16.	中尾俊樹, Masaki GOTO, Masashi Kurashina, Nobutake Tamai, Mikito Yasuzawa and Hitoshi Matsuki : スフィンゴリン脂質類似アミド型リン脂質二重膜の熱的相転移:鎖結合様式の対照的効果, 第56回熱測定討論会, Oct. 2020.
17.	中尾俊樹, Masaki GOTO, Masashi Kurashina, Nobutake Tamai, Mikito Yasuzawa and Hitoshi Matsuki : スフィンゴ脂質類似アミド結合型ホスファチジルコリンの有機合成と二重膜物性, 日本膜学会第42年会, Jun. 2020.
18.	Keiji Minagawa, Mikito Yasuzawa, Masashi Kurashina, Yukihiro Arakawa, Yasushi Imada and Shingo Fujita : 教えることによる学びを活用した高大院連携実験出張講義の実践, 大学教育カンファレンス in 徳島, Dec. 2019.
19.	近藤真太朗, Masashi Kurashina and Mikito Yasuzawa : 液相剥離グラフェンの配列制御に向けた基板への付着特性の評価, 2019年度日本化学会中国四国支部大会, Nov. 2019.
20.	柏原健太, Mikito Yasuzawa and Masashi Kurashina : プラズマエッチングを用いたフッ素樹脂材料の表面活性化及び親水化, 2019年度日本化学会中国四国支部大会, Nov. 2019.
21.	櫻井春希, 大野椋介, Masashi Kurashina, Mikito Yasuzawa and Masao Nagase : 集束イオンビーム化学気相蒸着(FIB-CVD)法を用いたナノピラーの作製及び細胞挿入の試み, 2019年度日本化学会中国四国支部大会, Nov. 2019.
22.	趙雨濛, 中尾俊樹, Mikito Yasuzawa, Masashi Kurashina and Hitoshi Matsuki : Evaluation on Nonspecific Adsorption on Modified Silica Surface using 2-Iminobiotin Avidin Interaction, 2019年度日本化学会中国四国支部大会, Nov. 2019.
23.	中尾俊樹, Masashi Kurashina, Masaki GOTO, Nobutake Tamai, Mikito Yasuzawa and Hitoshi Matsuki : アミド結合型ホスファチジルコリンの有機合成および二分子膜相転移評価, 2019年度日本化学会中国四国支部大会, Nov. 2019.
24.	QUYEN HONG HO, Yuta Morishita, Kazuki Shibata, Masashi Kurashina, Mikito Yasuzawa, 平賀由起 and 梶浦平旭 : Synthesis of borate adsorbent using chitosan nanofiber, 日本海水学会第70年会, Jun. 2019.
25.	Keiji Minagawa, Mikito Yasuzawa, Masashi Kurashina, Yukihiro Arakawa, Yasushi Imada and Kenji Mitsunaga : 科学技術コミュニケーション科目による高大院連携およびグローバル教育の試行, 大学教育カンファレンス in 徳島, Dec. 2018.
26.	Jhong Huan-Ping, Mikito Yasuzawa, Masashi Kurashina, Masahiro Uchimaru, Chen-Hao Wang and Wei-Hung Chiang : Immobilization of Nanocarbons and Prussian Blue by Electrodeposition for Glucose and H2O2 Biosensor Detection, 2018年電気化学秋季大会, Sep. 2018.
27.	Masashi Kurashina, 鈴鹿史明 and Mikito Yasuzawa : 酵素または銅ナノ構造を用いたグルコース酸化電極, 日本海水学会第69年会, Jun. 2018.
28.	Keiji Minagawa, Mikito Yasuzawa, Masashi Kurashina, Yukihiro Arakawa, Yasushi Imada and Kenji Mitsunaga : 学部生と大学院生のティーチングアシスタントチームによる高大院連携化学実験出張講義, 大学教育カンファレンス in 徳島, Jan. 2018.
29.	Masashi Kurashina, Yoshioka Maki, Quyen Hong Ho and Mikito Yasuzawa : 環境親和型材料を用いたリン酸イオンの吸脱着と回収, 第4回海水・生活・化学連携シンポジウム, Oct. 2017.
30.	Masashi Kurashina, Yoshioka Maki, Quyen Hong Ho and Mikito Yasuzawa : 環境親和型材料を用いたリン酸イオンの吸脱着と回収, 日本海水学会第68年会, Jun. 2017.
31.	礒合俊輔, 日裏健太郎, 丹波萌, Masashi Kurashina and Mikito Yasuzawa : FABRICATION OF GLUCOSE OXIDASE-IMMOBILIZED ELECTRODE USING ELECTRODEPOSITION METHOD, 第61回化学センサ研究発表会, Mar. 2017. (Summary) Glucose oxidase (GOx)-immobilized electrodes were prepared by the combination of electrodeposition and photopolymerization. Methacryloyl choline chloride (NMA) were employed as photo-polymeriable methacrylates and were added in the enzyme- electrdeposition solution, in order to be entrapped in the enzyme film. In order to investigate the enzyme film formation behavior during the electrodeposition process, quartz crystal microbalance (QCM) technique was employed. QCM measurement results indicated that the amount of deposit increased continuously up to around 15 minutes, while the decrease of deposit was observed after that time. The amount of GOx immobilized on the electrode was also measured using Amplex Red Assay Kit and showed that the decrease of deposit was parallel with the decrease of GOx on the electrode. However, the amount of enzyme on the electrode started to increase again after electrodeposition time of 40 minutes. The glucose sensor sensitivity of the obtained electrode showed a good correlation with the amount of enzyme immobilized on the electrode.
32.	Keiji Minagawa, Mikito Yasuzawa, Masashi Kurashina, Yukihiro Arakawa, Yasushi Imada and Shingo Fujita : 化学実験出張講義への外国人研究者・留学生の参加―グローバル化を目指した高大連携, 大学教育カンファレンス in 徳島, 46-47, Dec. 2016.
33.	Masashi Kurashina : 層状複水酸化物のリン酸イオン吸脱着能の結晶サイズによる制御, 第3回日本海水学会若手会海水・生活・化学連携シンポジウム, Oct. 2016.
34.	Masashi Kurashina : 層状複水酸化物のリン酸イオン吸脱着能の結晶サイズによる制御, 日本海水学会第67年会, Jun. 2016.
35.	別役優太, Masashi Kurashina and Toshio Takayanagi : グラフェン懸濁液のミセル動電クロマトグラフィーにおけるポリエチレングリコールの添加効果, 第76回分析化学討論会, May 2016.
36.	Hirokazu Miyoshi, Masayuki Shono, shingo Imagawa, Tamaki Otani, Masashi Kurashina and Eiji Kanezaki : 細胞膜吸着性と徐放出性を有する新規マルトール-シリカナノ粒子複合体の調製, 2015日本化学会中国四国支部大会, Nov. 2015.
37.	Masashi Kurashina, Yuki Ogawa and Eiji Kanezaki : 層状複水酸化物のリン酸イオン吸脱着能の制御, 第2回日本海水学会若手会海水・生活・化学連携シンポジウム, Oct. 2015.
38.	Masashi Kurashina, Yuki Ogawa and Eiji Kanezaki : Mg/Fe層状複水酸化物の熟成方法によるリン酸イオン吸脱着と結晶子サイズの変化, 第59 回粘土科学討論会, Sep. 2015.
39.	Masashi Kurashina : 層状複水酸化物を用いたオキソ酸の除去と利用, 日本海水学会第66年会, Jun. 2015.
40.	新妻章一, Hirokazu Miyoshi, Masashi Kurashina and Eiji Kanezaki : テトラヒドロキシチタン(IV)を用いて調製された酸化チタンナノ構造体の光電気化学特性, 日本化学会第95春季年会, Mar. 2015.
41.	Takuya Ehiro, Hisanobu Misu, Masashi Kurashina, Keizo Nakagawa, Masahiro Katoh, Shigeru Sugiyama, Yuuki Katou and Wataru Ninomiya : Improvement of the Catalytic Activity on MCM-41 for Oxidative Dehydrogenation of Isobutane, 化学工学会第80年会, Mar. 2015.
42.	Ai Itagaki, Masashi Kurashina, Keizo Nakagawa, Masahiro Katoh, Shigeru Sugiyama, Yuuki Katou and Wataru Ninomiya : Characterization and Catalytic Activity for Oxidative Dehydrogenation of Isobutane on Cr-FSM-16 Catalyst Prepared Using Ion Exchange Method, 化学工学会第80年会, Mar. 2015.
43.	Masashi Kurashina, 田中惇浩, 大西孝二, 井上樹, 田嶋千裕 and Eiji Kanezaki : Mg/Al層状複水酸化物を用いたモリブデン酸・ホウ酸の吸着, 2014年日本化学会中国四国支部大会, Nov. 2014.
44.	小川友希, Masashi Kurashina and Eiji Kanezaki : Mg/Fe層状複水酸化物からのリン酸イオンの溶出, 2014年日本化学会中国四国支部大会, Nov. 2014.
45.	山城美咲, Masashi Kurashina and Eiji Kanezaki : ドデシルベンゼンスルホン酸を含む銅水酸化物ナノシートの合成, 2014年日本化学会中国四国支部大会, Nov. 2014.
46.	Masashi Kurashina : 層状複水酸化物を用いたオキソ酸の除去と利用 ∼モリブデン酸・ホウ酸・リン酸∼, 日本海水学会若手会海水・生活・化学連携シンポジウム, Sep. 2014.
47.	Masashi Kurashina, 田中惇浩, 大西孝二 and Eiji Kanezaki : Mg/Al層状複水酸化物によるモリブデン酸イオンの吸着, 日本海水学会第65年会, Jun. 2014.
48.	Masashi Kurashina : Synthesis of nanosheet from layered transition-metal hydroxide, 錯体化学会第63回討論会, Nov. 2013.
49.	Yuki Ogawa, Masashi Kurashina and Eiji Kanezaki : 粘土層間にあるリン酸イオンの肥料への応用, 第3回CSJ化学フェスタ2013, Oct. 2013.
50.	Ken-Ichiro Sotowa, Yuika Shimizu, Takahiro Togawa, Masashi Kurashina, Toshihide Horikawa and Jesus Rafael Alcantara Avila : 塩基性酢酸銅の析出に及ぼす原料混合条件の影響, 化学工学会第45回秋季大会, Sep. 2013.
51.	Shoichi Niizuma, Hirokazu Miyoshi, Masashi Kurashina and Eiji Kanezaki : 5CB液晶分子を内包したシリカナノカプセルの調整とその分光学特性, 日本化学会第93回春季年会, Mar. 2013.
52.	増田真之, Masashi Kurashina and Eiji Kanezaki : Synthesis of lepidocrocite (γ-FeOOH) nanosheet via delamination of Fe(II)/Fe(III) layered double hydroxide, 日本化学会第93春季年会, Mar. 2013.
53.	田中惇浩, Masashi Kurashina and Eiji Kanezaki : 層状複水酸化物を用いたモリブデン酸イオンの吸着, 2012年日本化学会西日本大会, Nov. 2012.
54.	増田真之, Masashi Kurashina and Eiji Kanezaki : FeII/FeIII層状複水酸化物(Green rust)を経由したナノシートの合成, 2011年日本化学会西日本大会, Nov. 2011.
55.	八木隆幸, Hirokazu Miyoshi, Masashi Kurashina and Eiji Kanezaki : 酸化チタンナノ構造体の光蓄電特性に及ぼす照射光強度の効果, 2011年日本化学会西日本大会, Nov. 2011.
56.	天津智大, Masashi Kurashina and Eiji Kanezaki : Ion Exchange of Interlayer-Hydrogenphosphate in Zn/Fe Layered Double Hydroxide, 日本化学会第91春季年会, Mar. 2011.
57.	日浦宏一, Hirokazu Miyoshi, Masashi Kurashina and Eiji Kanezaki : ヨウ素分子を固定したメソポーラス酸化チタン粒子の光蓄電特性, 第29回固体・表面光化学討論会(九州大学), Nov. 2010.
58.	櫂谷繁広, 前田慎平, Hirokazu Miyoshi, Masashi Kurashina and Eiji Kanezaki : メチルビオロゲン分子を被包した酸化チタン構造体の光蓄電特性に及ぼすpHの効果, 第29回固体・表面光化学討論会(九州大学), Nov. 2010.
59.	坂本健尚, Hirokazu Miyoshi, Masashi Kurashina and Eiji Kanezaki : メチルビオロゲンを挟み込んだ酸化チタン超微粒子修飾電極の光蓄電特性, 第29回固体・表面光化学討論会(九州大学), Nov. 2010.
60.	Kazuo Hida, Yuki Aono, Masashi Kurashina, Etsuko Fujinaga, Shoko Ueta, Masaki Nishiuchi and Yasuhiko Kawamura : Generation of Unique Compounds Based on the Cycloaddition of Cumulenes, 21st Symposium on Physical Organic Chemistry, Sep. 2010. (Summary) クムレンの有する累積二重結合は，構成するsp炭素原子がそれぞれ反応点となり得ることから多様な生成物が期待できる．しかし，ラジアレンの合成出発物としての研究が主なものであり，詳細な反応分析はなされていない．本研究では，クムレンの付加環化を基軸とした拡張ラジアレンの生成，複素環化合物や四員環化合物，さらに交叉共役二重結合化合物の生成と，多様性に富んだクムレンの化学変換を明らかにする． (Keyword) Cumulated Double Bond / Cumulene / Cycloaddition / Radialene / Four-membered Ring Compound
61.	舟越俊弘, Masashi Kurashina and Eiji Kanezaki : Thermal change of the emission intensity from Eu3+ at interlayer of Mg/Al layered double hydroxide, 日本化学会第90春季年会, Mar. 2010.
62.	越智貴亮, Masashi Kurashina and Eiji Kanezaki : Elution Behavior of Phosphate Contained in Mg-Fe Layered Double Hydroxide, 日本化学会第90春季年会, Mar. 2010.
63.	武田裕次, 久次米博文, 江口顕生, Masashi Kurashina and Eiji Kanezaki : Stacking of Nickel and Cobalt Hydroxide Nanosheets, 日本化学会第90春季年会, Mar. 2010.
64.	舟越俊弘, Masashi Kurashina and Eiji Kanezaki : Intercalation of Eu(EDTMP) into Mg/Al layered double hydroxide, 日本化学会第89春季年会, Mar. 2009.
65.	加茂佑一, Eiji Kanezaki and Masashi Kurashina : A reversible change in the basal spacing of Mg/Al layered double hydroxide with interlayer [Cu(edtmp)], 日本化学会第89春季年会, Mar. 2009.
66.	Masashi Kurashina, 井上直紀, 江口顕生, Eiji Kanezaki, 志賀拓也 and 大塩寛紀 : Nanosheets of Layered Transition Metal Hydroxides and Its Magnetic Properties, 日本化学会第89春季年会, Mar. 2009.
67.	櫂谷繁広, 日浦宏一, Hirokazu Miyoshi, 片山周平, Masashi Kurashina and Eiji Kanezaki : ルテニウム錯体を内部に高密度に固定し被包した酸化チタンナノ構造体の調製, 第27回固体・表面光化学討論会, Nov. 2008.
68.	Hirokazu Miyoshi, 片山周平, Masashi Kurashina and Eiji Kanezaki : 酸化チタンナノ構造体に被包したメチルビオロゲンの光化学的挙動, 第27回固体・表面光化学討論会, Nov. 2008.
69.	Masashi Kurashina, 江口顕生, Eiji Kanezaki, 志賀拓也 and 大塩寛紀 : ニッケル層状水酸化物の層剥離と磁気的性質, 日本化学会第88春季年会, Mar. 2008.
70.	江口顕生, Masashi Kurashina, Eiji Kanezaki, 志賀拓也 and 大塩寛紀 : コバルト層状水酸化物の層剥離と磁気的性質, 日本化学会第88春季年会, Mar. 2008.
71.	片山周平, Hirokazu Miyoshi, 三谷恵理子, 坂田孝夫, 森博太郎, Masashi Kurashina and Eiji Kanezaki : 酸化チタンナノカプセルに被包された長寿命メチルビオロゲンラジカルカチオンの生成, 日本化学会第88春季年会, Mar. 2008.
72.	片山周平, 三谷恵理子, Hirokazu Miyoshi, 坂田孝夫, 森博太郎, Masashi Kurashina and Eiji Kanezaki : 酸化チタンナノカプセルに被包したメチルビオロゲンの光化学, 2007年日本化学会西日本大会, Nov. 2007.
73.	Masashi Kurashina, 江口顕生, Eiji Kanezaki, 志賀拓也 and 大塩寛紀 : コバルト，ニッケル層状水酸化物の層剥離と磁性の検討, 第57回錯体化学討論会, Sep. 2007.
74.	嶋村彰紘, 杉原紗矢, Masashi Kurashina and Eiji Kanezaki : 層間に有機物を含むMg-Al系層状複水酸化物の調製と特性評価, 第51回粘土科学討論会, Sep. 2007.
75.	Hirokazu Miyoshi, 片山周平, Masashi Kurashina and Eiji Kanezaki : 酸化チタンナノカプセルの調製と光化学特性, 日本化学会第87春季年会, Mar. 2007.
76.	江口顕生, Masashi Kurashina and Eiji Kanezaki : コバルト層状水酸化物の合成と微粒子化, 日本化学会第87春季年会, Mar. 2007.
77.	嶋村彰紘, Masashi Kurashina and Eiji Kanezaki : リン酸イオンを層間に含むMg/Al 層状複水酸化物の合成と物性, 日本化学会第87春季年会, Mar. 2007.
78.	若松秀美, Masashi Kurashina and Eiji Kanezaki : Mg/Al層状複水酸化物へのインターカレーションによるオレンジIIの不溶化, 日本化学会第87春季年会, Mar. 2007.
79.	Masashi Kurashina, 江口顕生 and Eiji Kanezaki : ニッケル層状水酸化物の合成と層剥離の検討, 日本化学会第87春季年会, Mar. 2007.
80.	浜田剛志, 大嶋紀一, Masashi Kurashina, 長谷川雄大, 山野井慶徳, 西原寛, 有田亮太郎, 諏訪雄二, 黒木和彦 and 青木秀夫 : 平坦バンド強磁性体として設計されたオリゴ[1-(ジメチルアミノ)ピロール]の電気化学及び磁気特性, 第52回ポーラログラフィーおよび電気分析化学討論会, Nov. 2006.

Et cetera, Workshop:

1.	Masashi Kurashina : 応用化学システムコースでの「基礎化学実験」, 教育シンポジウム2024, No.3, Jan. 2024.
2.	Masashi Kurashina : 層状水酸化物の機能と応用, 第20回社会産業理工学研究交流会2022, Sep. 2022.
3.	Masashi Kurashina : リン酸を含むMg/FeおよびZn/Fe層状複水酸化物の溶出挙動, 12th ENGINEERING FESTIVAL The University of Tokushima, Sep. 2012.

Report:

1.	Tomoki Yabutani, Yoshihisa Suzuki, Masaki Nishiuchi, Masashi Kurashina and Toshihide Horikawa : 化学応用工学科のFD活動について, 平成23年度FD研究報告書, 32-49, Feb. 2012.

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

銅水酸化物ナノシート触媒電極でのCO2還元による選択的な有用有機物生成 (Project/Area Number: 23K04418 )
Recovery of rare metals by use of non-strong acid and non-nitrogen containing solvents from wastes (Project/Area Number: 22656207 )
Search by Researcher Number (30400708)

Assistant Professor : Kurashina, Masashi

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