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20090915--> ID: Pass: Lost Password? / Register Now! --> 20090915--> --> The NI technologies for the collection and sharing of Neuro-related data are important for the brain understanding. These information include electrical resources, papers, experimental data, mathematical models, simulations, URLs, etc. Hence, it is necessary to develop a database system to integrate these disparate resources into a single base named XooNIps, which serves as the Base Platform for each research fields. 20090915--> Home News Forum 20090915--> Advanced Search--> Login XooNIps検索    全て タイトル & キーワード メタデータ Article      詳細検索 インデックスツリー open all close all Public 全て タイトル & キーワード メタデータ Article --> 詳細 閲覧数:1722 ID AN00181569-19741200-1009 アイテムタイプ Article このアイテムを表示する 画像 本文 AN00181569-19741200-1009.pdf Type : application/pdf Size : 120.7 KB Last updated : Nov 19, 2010 Downloads : 983 Total downloads since Nov 19, 2010 : 983 タイトル P.M.R Evidence for biaxial Long-Range Couplings in Some Pyranosid-2-and 3-Ulose Derivatives 著者 Yotaro KONDO (Kondo yotaro) 教養部 版 Publisher 出版地 奈良 出版者 奈良大学 上位タイトル 奈良大学紀要 (Memoirs of the Nara University). Vol.3号, (1974. 12) ,p.99- 105 識別番号 ISSN 03892204 抄録 Long_range coupling constants over four bonds (4J), which are closely correlated with stereochemistry, provide valuable information on structures, conformations and configurations of organic compounds (1,2). It is generally known that the occurrence of intensive 4J long-range couplings in saturated cyclic systems requires a bonding system of the coupled protons in the planar W-arrangement(3,4), and indeed the protons of a 1,3-diequatorial orientationin a pyraroid carbohydrate with the chair conformation have been reported to show 4J. On the contrary, there have been several reports demonstrating occurrence of 1,3-diaxial long-range couplings in halogenocyclohexanones(5) and carbohydrates (6-8). In a previous paper (9), the author has reported a small 4J long-range coupling constant (1.OHz) between H-2 and H-4 in methyl 2-O-acetyl-4, 6-O-benzylidene-a-D-Yibo-hexopyranosid-3-ulose(1). 言語 eng 資源タイプ text ジャンル Departmental Bulletin Paper Index / Public / 奈良大学紀要 / 3号 関連アイテム