研究者詳細 - 中西　和樹

論文 - 中西　和樹

分割表示 412 件中 321 - 340 件目／全件表示 >>

Monolithic silica column for in-tube solid-phase microextraction coupled to high-performance liquid chromatography. 査読有り

Shintani Y, Zhou X, Furuno M, Minakuchi H, Nakanishi K

Journal of chromatography. A 985 巻 ( 1-2 ) 頁： 351 - 7 2003年1月

Phase separation in sol-gel system containing mixture of 3-and 4-functional alkoxysilanes 査読有り

Itagaki A, Nakanishi K, Hirao K

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 26 巻 ( 1-3 ) 頁： 153 - 156 2003年1月

Supramolecular templating of mesopores in phase-separating silica sol-gels incorporated with cationic surfactant 査読有り

Nakanishi K, Sato Y, Ruyat Y, Hirao K

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 26 巻 ( 1-3 ) 頁： 567 - 570 2003年1月

Controlled hierarchical pore structures in ethylene-bridged polysilsesquioxane gels 査読有り

Kobayashi Y., Nakanishi K., Hirao K.

Materials Research Society Symposium - Proceedings 788 巻頁： 353 - 358 2003年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Materials Research Society Symposium - Proceedings

Formation of hierarchical macropores and mesopores in ethylene-bridged polysilsesquioxane sol-gel systems via concurrent sol-gel transition and phase separation induced by the incorporation of supramolecular templats has been investigated. A series of poly(ethyleneglycol)-poly(propyleneglycol)- poly(ethyleneglycol) triblock copolymers, EOPOEOs, have been employed as supramolecular templates, while 1,2-bis(trimethoxysilyl)ethane was used as a polysilsesquioxane source. Successful combination of templated mesopores and well-defined macropores due to phase-separation has been found in the system with EOPOEOs having 70 PO units and respective 20 EO units. Although similar macroporous morphology has been obtained for all the EOPOEOs with EO chain longer or shorter than 20 units, die optimum composition for the co-continuous macropores and that for templated mesopores deviated from each other, resulting in the failure of producing hierarchical macropores and mesopores.

DOI： 10.1557/proc-788-ll3.10

Scopus

Monolithic silica columns for high-efficiency chromatographic separations 査読有り

Tanaka N, Kobayashi H, Ishizuka N, Minakuchi H, Nakanishi K, Hosoya K, Ikegami T

JOURNAL OF CHROMATOGRAPHY A 965 巻 ( 1-2 ) 頁： 35 - 49 2002年8月

Monolithic silica columns for high-efficiency chromatographic separations. 査読有り

Tanak N, Kobayashi H, Ishizuka N, Minakuchi H, Nakanishi K, Hosoya K, Ikegami T

Journal of chromatography. A 965 巻 ( 1-2 ) 頁： 35 - 49 2002年8月

Monolithic silica columns with various skeleton sizes and through-pore sizes for capillary liquid chromatography 査読有り

Motokawa M, Kobayashi H, Ishizuka N, Minakuchi H, Nakanishi K, Jinnai H, Hosoya K, Ikegami T, Tanaka N

JOURNAL OF CHROMATOGRAPHY A 961 巻 ( 1 ) 頁： 53 - 63 2002年6月

Monolithic silica columns with various skeleton sizes and through-pore sizes for capillary liquid chromatography. 査読有り

Motokawa M, Kobayashi H, Ishizuka N, Minakuchi H, Nakanishi K, Jinnai H, Hosoya K, Ikegami T, Tanaka N

Journal of chromatography. A 961 巻 ( 1 ) 頁： 53 - 63 2002年6月

Monolithic silica columns for high-efficiency separations by high-performance liquid chromatography 査読有り

Ishizuka N, Kobayashi H, Minakuchi H, Nakanishi K, Hirao K, Hosoya K, Ikegami T, Tanaka N

JOURNAL OF CHROMATOGRAPHY A 960 巻 ( 1-2 ) 頁： 85 - 96 2002年6月

Monolithic silica columns for high-efficiency separations by high-performance liquid chromatography. 査読有り

Ishizuka N, Kobayashi H, Minakuchi H, Nakanishi K, Hirao K, Hosoya K, Ikegami T, Tanaka N

Journal of chromatography. A 960 巻 ( 1-2 ) 頁： 85 - 96 2002年6月

Monolithic HPLC silica columns 査読有り

Lubda D, Cabrera K, Nakanishi K, Minakuchi H

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 23 巻 ( 2 ) 頁： 185 - 187 2002年2月

Phase separation in alkylene-bridged polysilsesquioxane sol-gel systems 査読有り

Nakanishi K, Yamato T, Hirao K

ORGANIC/INORGANIC HYBRID MATERIALS-2002 726 巻頁： 291 - 296 2002年

Phase separation in sol-gel process of alkoxide-derived silica-zirconia in the presence of polyethylene oxide 査読有り

Takahashi R, Sato S, Sodesawa T, Suzuki K, Tafu M, Nakanishi K, Soga N

JOURNAL OF THE AMERICAN CERAMIC SOCIETY 84 巻 ( 9 ) 頁： 1968 - 1976 2001年9月

Chromatographic characterization of macroporous monolithic silica prepared via sol-gel process 査読有り

Ishizuka N, Minakuchi H, Nakanishi K, Hirao K, Tanaka N

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 187 巻頁： 273 - 279 2001年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Colloids and Surfaces A: Physicochemical and Engineering Aspects

A continuous porous silica monolith prepared by the sol-gel process including phase separation was aged in a basic solvent making use of hydrolysis of urea to prepare extended mesopore structures for chromatographic applications. The dissolution-reprecipitation kinetics at the interfaces between wet gel skeletons and an external solvent affected the size and volume of pores formed within the skeletons. At above 200°C, the pore size attained the macropore dimensions (>50 nm). The results of chromatography indicate that the monolithic silica column with wide mesopore could reduce the separation time compared to the conventional column packed with 5 μm silica particle. Copyright © 2001 Elsevier Science B.V.

DOI： 10.1016/S0927-7757(01)00642-2

Monolithic LC columns 査読有り

Tanaka N, Kobayashi H, Nakanishi K, Minakuchi H, Ishizuka N

ANALYTICAL CHEMISTRY 73 巻 ( 15 ) 頁： 420A - 429A 2001年8月

About the total performance of monolithic HPLC-columns. 査読有り

Cabrera K, Minakuchi H, Lubda D, Nakanishi K

ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 221 巻頁： U100 - U100 2001年4月

Three-dimensional structure of a sintered macroporous silica gel 査読有り

Jinnai H, Nakanishi K, Nishikawa Y, Yamanaka J, Hashimoto T

LANGMUIR 17 巻 ( 3 ) 頁： 619 - 625 2001年2月

Macroporous morphology of titania films prepared by sol-gel dip-coating method from a system containing poly(ethylene glycol) and poly(vinylpyrrolidone) 査読有り

Kajihara K, Nakanishi K

JOURNAL OF MATERIALS RESEARCH 16 巻 ( 1 ) 頁： 58 - 66 2001年1月

Apatite formation on ethylene-vinyl alcohol copolymer modified with silane coupling agent and calcium silicate 査読有り

Oyane A., Minoda M., Miyamoto T., Nakanishi K., Kawashita M., Kokubo T., Nakamura T.

Key Engineering Materials 192-195 巻頁： 713 - 716 2001年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Key Engineering Materials

Silanol (Si-OH) groups on materials are believed to induce the apatite nucleation in the body environment. In the present study, the apatite-forming ability of ethylene-vinyl alcohol copolymer (EVOH), whose surface was modified to be abundant in Si-OH groups, was investigated in a simulated body fluid (SBF) with ion concentrations nearly equal to those of human blood plasma. Surface modification of EVOH with Si-OH groups was carried out by reacting isocyanatopropyltriethoxysilane (IPTS) and subsequent hydrolysis of its Si-OC2H5 groups by 1M-HCl or saturated Ca(OH)2 aqueous solution. Apatite was, however, not formed on thus surface-modified EVOH in SBF even after 7 d. When the IPTS-treated EVOH was treated with silica or calcium silicate solution, the obtained specimen formed the apatite on its surface in SBF within 7 or 2 d, respectively. The present surface-modification of EVOH is effective for obtaining an apatite-polymer fiber composite in SBF, which could give bone substitute having bone-bonding ability as well as mechanical properties analogous to those of the natural bone.

Scopus

Macroporous silicate films by dip-coating 査読有り

Kumon S, Nakanishi K, Hirao K

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 19 巻 ( 1-3 ) 頁： 553 - 557 2000年12月

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