Výsledky vyhledávání - "Kazutoshi Nagata"

Sulfonyl-bridged oligo(benzoic acid)s: synthesis, X-ray structures, and properties as metal extractants

Autor: Tomoko Hayashi, Naoya Morohashi, Tetsutaro Hattori, Kazutoshi Nagata

Publikováno v: Journal of Inclusion Phenomena and Macrocyclic Chemistry. 78:161-170

Sulfonyl-bridged oligo(benzoic acid)s 7 n (n = 2–4) are prepared from the corresponding triflate esters (8 n ) of sulfur-bridged oligophenols by palladium-catalyzed methoxycarbonylation of the triflate moieties, followed by hydrolysis of the result

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d6897c5131ebb156e3e086a3a64c2e17
https://doi.org/10.1007/s10847-012-0283-9

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Synthesis of novel dihydroxydiphosphines and dihydroxydicarboxylic acids having a tetra(thio-1,3-phenylene-2-yl) backbone

Autor: Kazutoshi Nagata, Yuki Akahira, Tetsutaro Hattori, Naoya Morohashi

Publikováno v: Supramolecular Chemistry. 23:144-155

Novel tetradentate PPh2–OH hybrid ligands 5 and CO2H–OH hybrid ligands 6 have been successfully synthesised from tetra(thio-5-tert-butyl-2-hydroxy-1,3-phenylene) (2 4 ) by replacing the hydroxy groups at both the 2-position and either the 2′-,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a549f928a64a0d68e6770a579f4ca1e8
https://doi.org/10.1080/10610278.2010.514913

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A PREDICTION METHOD OF STRENGTH DETERIORATION IN AGING OF CIRCULAR STEEL TUBE CORRODED IN MARINE ENVIRONMENT

Autor: Yoshito Itoh, Eiichi Watanabe, Kazuaki Hashimoto, Kunitomo Sugiura, Kazutoshi Nagata, Hideharu Nakamura, Katashi Fujii, Ikuei Nogami

Publikováno v: Doboku Gakkai Ronbunshuu A. 66:92-105

海洋環境における円形鋼管杭の腐食にともなう強度低下の一予測法を示した．まず，防食工の損傷・劣化を考慮できる防食工の劣化モデルと腐食表面凹凸形状の経年変化を作成するモデ�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::85450a58c6d6d71f88204407b94e56a8
https://doi.org/10.2208/jsceja.66.92

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CORROSION SHAPES OF STEEL ANGLE MEMBER UNDER OCEANIC EXPOSURE DURING 19.5 YEARS

Autor: Yoshito Itoh, Kunitomo Sugiura, Tetsuya Yamasawa, Kazutoshi Nagata, Eiichi Watanabe, Kuniei Nogami, Katashi Fujii

Publikováno v: Doboku Gakkai Ronbunshuu A. 64:27-37

19.5年 (19年6ヶ月) 海洋曝露された無防食普通裸材 (アングル材) を対象にして，レーザ式表面形状測定装置を用いて精密な腐食形状計測を行い，腐食形状および板厚分布を把握した．これ�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b52af4767c7e30191a79e105daa29d6b
https://doi.org/10.2208/jsceja.64.27

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SIMPLIFIED EVALUATION OF COMPRESSIVE STRENGTH OF CORRODED STEEL PLATES

Autor: Eiichi Watanabe, Kunitomo Sugiura, Katashi Fujii, Kazutoshi Nagata, Kuniei Nogami, Isao Tamura, Yoshito Itoh

Publikováno v: Doboku Gakkai Ronbunshuu A. 63:43-55

正弦波で単純モデル化した仮想的腐食形状および実腐食形状を有する周辺単純支持の鋼板に対する数値シミュレーションにより，様々な腐食形状が残存圧縮性能に与える影響について検�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::18b47358981e9f2cd72569d60ac4d5a6
https://doi.org/10.2208/jsceja.63.43

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Resistance of a Portal Frame Bridge Pier Under Earthquake Waves from Arbitrary Directions

Autor: Kunitomo Sugiura, Kazutoshi Nagata, Eiichi Watanabe, Hiromu Okamoto, Toshihiko Naganuma

Publikováno v: Transportation Research Record: Journal of the Transportation Research Board. :367-374

Steel portal frames are used in Japan as basic structural frames for viaducts in metropolitan areas. These structures may be subject to both near-field and far-field earthquake motions from all directions. Although for isolated single piers the earth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::397fcb343e6eb9f9d1181f2ebd802262
https://doi.org/10.3141/trr.11s.2v34m1755g20007p

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