Author: P.K. Agrawal
Publisher: Elsevier
ISBN: 1483290743
Category : Science
Languages : en
Pages : 581
Get Book Here
Book Description
This detailed treatise is written for chemists who are not NMR spectroscopists but who wish to use carbon-13 NMR spectroscopy. It shows why measurement of carbon-13 NMR is needed and explains how the method can - or should - be used for rapid characterization of flavonoids, one of the most diverse and widespread groups of natural constituents. The first part of the book presents background information and discussion of the essential aspects of flavonoids and carbon-13 NMR spectroscopy and demonstrates its significant role in the revision of several earlier established chemical structures. It discusses various one- and two-dimensional NMR spectroscopic techniques and other relevant experimental methodologies for the interpretation of spectral details which enable individual resonance lines to be associated with the appropriate carbons in a molecule. The second part provides a comprehensive coverage of the carbon-13 chemical shifts of various classes and subclasses of flavonoids. It also illustrates how to utilize carbon-13 data to gain information for the determination of the nature, number and site of any substituent in flavonoids. Vital information for the differential and complete structure elucidation of the various classes of flavonoids by carbon-13 NMR shielding data is described in-depth in the third part of the book. The book will be welcomed by all those working in natural product chemistry who will appreciate the non-mathematical approach and the fact that such a wealth of theoretical and practical information has been assembled in a single volume.
Author: Jeffrey B. Harborne
Publisher: Springer
ISBN: 1489929096
Category : Science
Languages : en
Pages : 1218
Get Book Here
Book Description
The flavonoids, one of the most numerous and widespread groups of natural constituents, are important to man not only because they contribute to plant colour but also because many members (e.g. coumestrol, phloridzin, rotenone) are physiologically active. Nearly two thousand substances have been described and as a group they are universally distributed among vascular plants. Although the anthocyanins have an undisputed function as plant pigments, the raison d'etre for the more widely distributed colourless flavones and flavonols still remains a mystery. It is perhaps the challenge of discovering these yet undisc10sed functions which has caused the considerable resurgence of interest in flavonoids during the last decade. This book attempts to summarize progress that has been made in the study of these constituents since the first comprehensive monograph on the chemistry of the flavonoid compounds was published, under the editorship of T. A. Geissman, in 1962. The present volume is divided into three parts. The first section (Chapters 1-4) deals with advances in chemistry, the main emphasis being on spectral techniques to take into account the re cent successful applications of NMR and mass spectral measurements to structural identifications. Recent developments in isolation techniques and in synthesis are also covered in this section. Advances in chemical knowledge of individual c1asses of flavonoid are mentioned inter aha in later chapters of the book.
Author: John Buckingham
Publisher: CRC Press
ISBN: 148228250X
Category : Medical
Languages : en
Pages : 1064
Get Book Here
Book Description
Widely distributed throughout plant families, flavonoids give many flowers and fruits their vibrant colors. They also play a role in protecting the plants from microbe and insect attacks. More importantly, the consumption of foods containing flavonoids has been linked to numerous health benefits. Recent research indicates that flavonoids can be nutritionally helpful by triggering enzymes that reduce the risk of certain cancers, heart disease, and age-related degenerative diseases. Foods that contain high amounts of flavonoids include blueberries, red beans, cranberries, and blackberries. Many other foods, including red and yellow fruits and vegetables and some nuts, as well as red wine and certain teas are also rich in flavonoids. Due the potential health benefits, research into flavonoids and their potential beneficial effects on human health continues unabated. Dictionary of Flavonoids with downloadable resources lists all known flavonoids (approximately 13,000) in a single volume. It details chemical structures, physical properties, and biological source, and also includes a concise bibliography. Derived from the well-respected Dictionary of Natural Products, it is presented in a compact dictionary format, and is an invaluable reference source for all those working in this area. The book is accompanied by downloadable resources that are fully searchable by chemical structure as well as by physical properties and chemical names. Organized in alphabetical order, each page is packed with authoritative information that readers can easily access. The book and downloadable resource combination gives researchers powerful tools for unlocking and utilizing the secrets held within the colors of the plant kingdom.
Author: J.B. Harborne
Publisher: Routledge
ISBN: 1351410458
Category : Science
Languages : en
Pages : 689
Get Book Here
Book Description
Flavonoids are a group of natural products isolated from a wide variety of plants, and are responsible for much of the coloring found in vascular plants. They exhibit a wide range of biological activities and are of particular interest as potential anti-cancer agents, as insect antifeedants, and as natural insecticides. The Flavonoids: Advances in Research Since 1986 is a self-contained account of this important group of plant products.
Author: Tom Mabry
Publisher: Springer Science & Business Media
ISBN: 364288458X
Category : Medical
Languages : en
Pages : 362
Get Book Here
Book Description
About 1958, the late Professor R. E. ALSTON and Professor B. L. TURNER, both of the Department ofBotany, The University ofTexas at Austin, initiated a general systematic investigation ofthe legurne genus Baptisia. They found that flavonoid patterns, as revealed by two-dimensional paper chromatography, were valid criteria for the recognition of the Baptisia species and for the documentation of their numerous natural hybrids. Later, they showed that the flavonoid chemistry could be used for the analysis of gene flow among populations. At that time no attempt was made to even partially identify the flavonoids which were detected chromatographically. Neverthe1ess, it soon became apparent that the full value of the chemical data for systematic purposes required knowledge of the structures of the flavonoids. In 1962, one of us (T.J.M.) in collaboration with Drs. ALSTON and TURNER beg an the chemical analysis of the more than 60 flavonoids which had been chromatographi cally detected in the 16 Baptisia species. In the intervening years, a number of chemists and botanists, inc1uding Drs. K. BAETCKE, B. BREHM, M. CRANMER, D. HORNE, J. KAGAN, B. KROSCHEWSKY, J. MCCLURE, H. RÖSLER, and J. WALLACE, participated in the devel opment of techniques and procedures for the rapid identification of known flavonoids and in the structure determination of new flavonoids. In addition, the flavonoid chem istry of many plants other than Baptisia was investigated.
Author: J. B. Harborne
Publisher: Springer
ISBN: 1489929150
Category : Science
Languages : en
Pages : 751
Get Book Here
Book Description
The ftavonoid pigments, one of the most numerous and widespread groups of natural constituents, are ofimportance and interest to a wide variety ofphysical and biological scientists and work on their chemistry, occurrence, natural distribution and biological function continues unabated. In 1975, a mono graph covering their chemistry and biochemistry was published by Chapman and Hall under our editors hip entitled The Flavonoids. The considerable success of this publication indicated that it filled an important place in the scientific literature with its comprehensive coverage of these fascinating and versatile plant substances. The present volume is intended to update that earlier work and provide a detailed review of progress in the ftavonoid field during the years 1975 to 1980. Although cross references are made to The Flavonoids, this supplement is entirely self-contained and where necessary, tabular da ta from the earlier volume are incJuded and expanded here. The choice oftopics in Recent Advances has been dictated by the developments that have occurred in ftavonoid research since 1975, so that not all subjects covered in The Flavonoids are reviewed again here. A major advance in ftavonoid separation has been the app1ication ofhigh performance liquid chromatography (HPLC) and this is reviewed inter alia in the opening chapter on separation techniques. An equally important development in the spectral analysis of ftavonoids has been the measurement of carbon-13 NMR spectra and this subject is authoritatively discussed in Chapter 2 and is also illustrated with the spectra of 125 representative ftavonoids.
Author: Helen A. Stafford
Publisher: CRC Press
ISBN: 9780849360855
Category : Technology & Engineering
Languages : en
Pages : 318
Get Book Here
Book Description
This comprehensive review discusses the biosynthesis and catabolism of flavonoids and their regulation in plants. This interesting work approaches the subject matter from both a historical and methodological point of view. It places emphasis on key regulatory enzymic steps in the two pathways leading to the flavonoid basic units as well as the overall pathway within the flavonoid group. This special volume focuses on the known cell-free enzymology at the C15 level, as well as isotopic tracer studies involving the still unknown enzymic steps. This up-to-date text is an excellent resource for all plant physiologists, biological chemists, phytochemists and chemical ecologists.
Author: William V. Dashek
Publisher: CRC Press
ISBN: 1351082930
Category : Science
Languages : en
Pages : 476
Get Book Here
Book Description
Modern plant science research currently integrates biochemistry and molecular biology. This book highlights recent trends in plant biotechnology and molecular genetics, serving as a working manual for scientists in academic, industrial, and federal laboratories. A wide variety of authors have contributed to this book, reflecting the thinking and expertise of active investigators who generate advances in technology. The authors were selected especially for their ability to create and/or implement novel research methods.
Author: Lutz Roth
Publisher: John Wiley & Sons
ISBN: 3527615504
Category : Science
Languages : en
Pages : 510
Get Book Here
Book Description
More and more attention is being paid to natural products chemistry. The number of recently discovered and described natural products is constantly increasing, leading to an abundance of detailed information in diverse specialist journals. The Roth Collection of Natural Products Data gives a clear overview of this development. It presents the data of approximately 75 selected natural products of plant origins in a concise and standardized form. The collection contains descriptions of the products with information on the physical and chemical properties, location, toxicology and risk potential. Complete spectroscopic and chromatographic data with clear information on measurement conditions and peaks round off the detailed depictions. With its illustrations of NMR, mass and IR spectra and its structural formulas, the collection is an important and stimulating reference work. Selected and commented references on each natural product facilitate the search for further information. Natural product chemists, pharmacists, biologists and toxicologists in research, industry and academia will soon find this reference work indispensable.
Author: R. F. Keeler
Publisher: CRC Press
ISBN: 1040279112
Category : Medical
Languages : en
Pages : 760
Get Book Here
Book Description
Featuring the work of 55 leading authorities on natural toxins, this new volume highlights the diversity of chemical classes among toxins, the range of effects on biological systems, and the variety of expressions of toxicoses. Supplying findings that have yielded significant solutions to practical toxicoses problems, this exceptional reference describes the toxicology and chemistry of toxic and phar macologically active compounds from plants and fungi ... discusses the occurrence, incidence, and epidemiology of several types of plant and fungal compound-induced toxicoses in man and animals ... details the structure/activity relation of several plant and fungal toxins and plant teratogens ... covers the toxicologic effects of many plant and fungal compounds on the lung, liver, heart, gastrointestinal tract, muscle, skin, and other organs ... considers the potential usefulness of plant and fungal substances as herbicides, pesticides, and insecticides ... examines plant/herbivore, plant/plant, and plant/fungal interactions as related to plant and fungal toxins ... presents current techniques used in toxicology and teratology studies ... and more! Toxicology of Plant and Fungal Compounds is an indispensable reference for toxicologists; biologists; natural product and organic chemists and biochemists; veterinarians; plant pathologists; land managers; health department personnel; and graduate school students in toxicology, biology, pharmacology, and public health.
