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Titlebook: Chemistry and Significance of Condensed Tannins; Richard W. Hemingway,Joseph J. Karchesy,Susan J. B Book 1989 Plenum Press, New York 1989

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书目名称Chemistry and Significance of Condensed Tannins
编辑Richard W. Hemingway,Joseph J. Karchesy,Susan J. B
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图书封面Titlebook: Chemistry and Significance of Condensed Tannins;  Richard W. Hemingway,Joseph J. Karchesy,Susan J. B Book 1989 Plenum Press, New York 1989
描述This book was developed from the proceedings of the first North American Tannin Conference held in Port. Angeles, Washington, August 1988. The objective of the conference was to bring together people with a common interest in condensed tannins and to promote interdisciplinary interactions that will lead to a better understanding of these important substances. Anot. her objective was the publicat. ion of this book because there has not been a monograph devoted to the chemistry and significance of tannins for several decades. The book is organized into sections dealing with the biosynthesis, structure, re­ actions, complexation with other biopolymers, biological significance, and use of tannins as specialty chemicals. The authors made a special attempt to focus on what we don‘t know as well as to provide a summary of what we do know in an effort to assist in planning future research. Our thanks go to the authors who so kindly contributed chapters and so pa­ tiently responded to our requests. We also thank Rylee Geboski and the Conference Assist. ance Staff, College of Forestry, Oregon State University, for their assistance in planning and conducting t. he conference, and Julia Wilson
出版日期Book 1989
关键词biological; biopolymer; biosynthesis; experiment; forest; forestry; fungi; lead; metabolism; nutrition; plant;
版次1
doihttps://doi.org/10.1007/978-1-4684-7511-1
isbn_softcover978-1-4684-7513-5
isbn_ebook978-1-4684-7511-1
copyrightPlenum Press, New York 1989
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发表于 2025-3-21 21:54:20 | 显示全部楼层
Tannins — Their Place in Plant Metabolism, such as lignans, phenolic acids, tannins, alkaloids, terpenoids etc. Excluding the structural polymers, the functions of many of these compounds (i.e., so-called secondary metabolites) are not well understood. This chapter presents an overview of the metabolism of phenylpropanoids, particularly hy
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Biogenesis of Condensed Tannins — An Overviewuntered proanthocyanidin polymers, each of these biosynthetic proposals invoke isomerase enzymes or chemical intermediates not yet encountered in nature. Thus, substantial further study is required to clarify the pathways involved. An experimental program is proposed to achieve this objective.
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Chemical Nature of Phlobapheneslso used to describe the red insoluble material produced by treating condensed tannins with mineral acid. The chemical composition of the “natural” phlobaphenes is complex and linked to other extraneous materials in addition to condensed tannins. Phlobaphenes are variable from plant source to plant
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Conformational Analysis of Oligomeric Proanthocyanidinss at the interflavan bond and the conformation of the heterocyclic rings. The behavior of the heterocyclic rings can be determined by study of the monomers and dimers. The results obtained from x-ray diffraction and MM2 calculations are reviewed here. Conformations at the interflavan bond are studie
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An Overview of Condensed Tannin Structurenins, phlobaphenes, and phenolic acids. Refining our understanding of the structure of polyflavonoids will lead to a better appreciation of their properties and help in developing their use as a renewable source of commodity and specialty chemicals. Considerable progress has already been made in the
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Chromatography of Proanthocyanidinshy can be carried out using a variety of gel types. Often, repeated separations are required to obtain pure compounds, and it has been found advantageous to alternate each separation with a different gel type. Counter-current separation methods have seen limited application; however, with the develo
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New NMR Experiments Applicable to Structure and Conformation Analysisr the past decade. This chapter summarizes these advances by describing how techniques including n.O.e. difference spectroscopy, homonuclear J-resolved and chemical shift correlation methods, and .C- and heteronuclear experiments have been applied to analyses of some example proanthocyanidins. These
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