Biflavanoids Book

Biflavanoids


  • Author : Shabir Hussain Lone
  • Publisher : Elsevier
  • Release Date : 2016-04-14
  • Genre: Science
  • Pages : 52
  • ISBN 10 : 9780081011904

GET BOOK
Biflavanoids Excerpt :

Biflavanoids are an important class of plant metabolites offering a range of activities, good availability and relatively low toxicity. Long thought to hold possible therapeutic potential, the recent surge in interest for natural product drug discovery has further highlighted the possibility of using them in the discovery of new drugs, and Biflavanoids: Chemical and Pharmacological Aspects provides a quick reference to the area in a focused manner, to support and encourage further research. Beginning with a focus on the structural features and occurrence of biflavanoids, Chapter 1 reviews key background information including notes on nomenclature and natural distribution. Chapter 2 then goes on to discuss methods for identification and isolation, with separation and purification using various chromatography methods reviewed, followed by identification via UV spectroscopy, NRM spectroscopy and mass spectrometry. Synthesis is the focus of Chapter 3, with a broad range of synthetic methods outlined, before the book concludes in Chapter 4 by describing the biochemical pharmacology of Biflavanoids and their anticancer, antimicrobial, antiviral, anti-inflammatory and analgesic activity. With its discussion of both the underlying chemistry and biological activity of Biflavanoids, Biflavanoids: Chemical and Pharmacological Aspects is a concise guide to this important class of compounds for all those working in the fields of medicinal chemistry and natural products drug discovery. Focused coverage of techniques for the isolation, identification, and synthesis of Biflavanoids Practical tool for researchers working with these flavonoid compounds Real-world expertise from the authors provides support for further developments in the growing field of natural product drug discovery Useful, clear illustrations of key structures throughout the text

Fortschritte der Chemie organischer Naturstoffe   Progress in the Chemistry of Organic Natural Products Book

Fortschritte der Chemie organischer Naturstoffe Progress in the Chemistry of Organic Natural Products


  • Author : Anonim
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 376
  • ISBN 10 : 9783709186565

GET BOOK
Fortschritte der Chemie organischer Naturstoffe Progress in the Chemistry of Organic Natural Products Excerpt :

The chemistry of condensed tannins has hitherto represented a relatively unattractive and therefore neglected area of study; one in which the weight of research effort involved is invariably disproportionate to the results achieved, in which the participating schools generally confine their approach to specific molecular species, and in which as yet no consensus has been reached regarding likely precursors. The problems which beset those engaged in this field represent a combined function of the abnormal complexity of the gradational range of oligomers of increasing mass and affinity for substrates which typify most extracts rich in tannins, and the consequent problem of their isolation and purification, the high chirality of tannin oligomers, the need to contend with the phenomenon of dynamic 'rotational isomerism about interflavanoid bonds in the IH n.m.r. spectral interpretation of their derivatives, the lack of precise knowledge regarding the points of bonding at nucleophilic centres, and the obvious limitations of a hitherto predominantly analytical approach. The last of these reflects the need for a general method of synthesis which permits unambiguous proof of both structure and absolute configuration also at higher oligomeric levels. With these objectives in mind we initiated a purely synthetic approach based on the premise that flavan-3,4-diols as source of electrophilic flavanyl-4-carbocations, and flavan-3-0Is as nucleophiles (cf 1,2) represent the prime initiators of a process of repetitive condensation in which the immediate products also represent the sequent nucleophilic substrates.

Flavonoids and Bioflavonoids Book

Flavonoids and Bioflavonoids


  • Author : Loránd Farkas
  • Publisher : Elsevier Science & Technology
  • Release Date : 1977
  • Genre: Bioflavonoids
  • Pages : 467
  • ISBN 10 : CORNELL:31924017633508

GET BOOK
Flavonoids and Bioflavonoids Excerpt :

Natural Products of Woody Plants Book

Natural Products of Woody Plants


  • Author : John W. Rowe
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 1243
  • ISBN 10 : 9783642740756

GET BOOK
Natural Products of Woody Plants Excerpt :

Wood as found in trees and bushes was of primary importance to ancient humans in their struggle to control their environment. Subsequent evolution through the Bronze and Iron Ages up to our present technologically advanced society has hardly diminished the importance of wood. Today, its role as a source of paper products, furniture, building materials, and fuel is still of major significance. Wood consists of a mixture of polymers, often referred to as lignocellulose. The cellulose micro fibrils consist of an immensely strong, linear polymer of glucose. They are associated with smaller, more complex polymers composed of various sugars called hemicelluloses. These polysaccharides are embedded in an amorphous phenylpropane polymer, lignin, creating a remarkably strong com posite structure, the lignocellulosic cell wall. Wood also contains materials that are largely extraneous to this lignocellulosic cell wall. These extracellular substances can range from less than 1070 to about 35% of the dry weight of the wood, but the usual range is 2% -10%. Among these components are the mineral constituents, salts of calcium, potassium, sodium, and other metals, particularly those present in the soil where the tree is growing. Some of the extraneous components of wood are too insoluble to be ex tracted by inert solvents and remain to give extractive-free wood its color; very often these are high-molecular-weight polyphenolics.

Plant Polyphenols Book

Plant Polyphenols


  • Author : Richard W. Hemingway
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 1053
  • ISBN 10 : 9781461534761

GET BOOK
Plant Polyphenols Excerpt :

This book was developed from the proceedings of the 2nd North American Tan nin Conference held in Houghton, Michigan, June, 1991. The objective of this con ference was to bring together people with a common interest in plant polyphenols and to promote interdisciplinary interactions that will lead to a bet ter understand ing of the importance of these substances. Another objective of this conference was to extend the 'tannin family' by making special efforts to encourage participation by scientists outside the United States, obtain more coverage of the hydrolyzable tannins, and further broaden the scope of coverage from the initial concentration on forestry and forest products. Com parison of the contents of this book with 'Chemistry and Significance of Condensed Tannins' that resulted from the proceedings of the 1st North American Tannin Conference shows the degree that these objectives were met. In developing the second conference, care was taken to assure that this book extends rather than duplicates the coverage of the first conference. Therefore, the two books should be taken together to obtain an up to date coverage of the broad area of chemistry and significance of plant polyphenols. Our thanks go to the authors who so kindly contributed chapters and so pa tiently responded to our requests. We thank the Conference Assistance Staff of Michigan Technological University for their help in planning and conducting the conference.

Fortschritte der Chemie organischer Naturstoffe Book

Fortschritte der Chemie organischer Naturstoffe


  • Author : Anonim
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 188
  • ISBN 10 : 9783709163665

GET BOOK
Fortschritte der Chemie organischer Naturstoffe Excerpt :

The condensed tannins (syn. polymeric proanthocyanidins) represent a major group of phenolic compounds in woody and some herbaceous plants (1-3). Their exceptional concentrations in the barks and heartwoods of a variety of tree species have resulted in their commercial extraction with the initial objective of applying the extracts in leather manufacture (4). Essentially all of their biological significance, e. g. the protection of plants from insects, diseases and herbivores, and most of the current, e. g. leather manufacture, and also most promising new uses, e. g. pharmaceuticals or wood preservatives, rest on their com plexation with other biopolymers like proteins and carbohydrates, or metal ions (5, 6). Increasing attention has thus been directed to understanding their conformation and conformational flexibility (7-20) in order to explain their biological activity and to provide a basis for further development of uses for these renewable phenolic compounds. Recent developments have also been initiated by the growing realization that the condensed tannins may additionally be credited for the profound health-beneficial properties of tea, fruit juices and red wine. This is mainly due to their in vitro radical scavenging (21) or antioxidant (22) biological properties, while the polymeric proanthocyanidins in red wine have been implicated in protection against cardiovascular disorders (23), e. g. the "French paradox" (24-26). Collectively these 'positive' characteristics of the polymeric proanthocyanidins have transformed "a relatively unattractive and therefore neglected area of study" (27) into, yet again, a fashionable research field.

Phytochemicals in Human Health Protection  Nutrition  and Plant Defense Book

Phytochemicals in Human Health Protection Nutrition and Plant Defense


  • Author : John T. Romeo
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 432
  • ISBN 10 : 9781461546894

GET BOOK
Phytochemicals in Human Health Protection Nutrition and Plant Defense Excerpt :

Proceedings of the 38th Annual Meeting at the Phytochemical Society of North America on Phytochemicals in Human Health Protection, Nutrition and Plant Defense, held July 26-31, 1998 in Pullman, WA, USA

Gymnosperms Book

Gymnosperms


  • Author : Anonim
  • Publisher : Krishna Prakashan Media
  • Release Date : 2022-07-01
  • Genre: Uncategoriezed
  • Pages : null
  • ISBN 10 : 8182830540

GET BOOK
Gymnosperms Excerpt :

Phenolic Metabolism in Plants Book

Phenolic Metabolism in Plants


  • Author : Ragai K. Ibrahim
  • Publisher : Springer Science & Business Media
  • Release Date : 2012-12-06
  • Genre: Science
  • Pages : 411
  • ISBN 10 : 9781461534303

GET BOOK
Phenolic Metabolism in Plants Excerpt :

This volume contains reviews presented at the 31 st annual meeting of the Phytochemical Society of North America, held at Colorado State University in Fort Collins, Colorado on June 22-26, 1991. This symposium, entitled Phenolic Metabolism in Plants, celebrated the origin of this society as the Plant Phenolics Group of North America; the first symposium, entitled Biochemistry of Plant Phenolic Substances, was also held at Fort Collins from August 31 to September 1, 1961. A brief history of the Society is presented in Chapter 12 by Stewart Brown, one of the original founders of the Society. We dedicate this volume to Hans Grisebach, 1926-1990, Professor of Biochemistry at the Biologisches Institut II, Freiburg, Germany, where he headed for many years a laboratory responsible for major advances in the area of phenolic metabolism; this will be self evident from the numerous bibliographical references cited in the literature for papers by his Freiburg group from about 1958 until now, and subsequently by former students and colla borators. His impact on the data reviewed in this volume will testify to this.

Aromatic and Heteroaromatic Chemistry Book

Aromatic and Heteroaromatic Chemistry


  • Author : C W Bird
  • Publisher : Royal Society of Chemistry
  • Release Date : 2007-10-31
  • Genre: Science
  • Pages : 456
  • ISBN 10 : 9781847555694

GET BOOK
Aromatic and Heteroaromatic Chemistry Excerpt :

Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued.

Biflavanoids Book

Biflavanoids


  • Author : Shabir Hussain Lone
  • Publisher : Elsevier
  • Release Date : 2016-05-19
  • Genre: Uncategoriezed
  • Pages : 52
  • ISBN 10 : 0081010303

GET BOOK
Biflavanoids Excerpt :

Biflavanoids are an important class of plant metabolites offering a range of activities, good availability and relatively low toxicity. Long thought to hold possible therapeutic potential, the recent surge in interest for natural product drug discovery has further highlighted the possibility of using them in the discovery of new drugs, and "Biflavanoids: Chemical and Pharmacological Aspects" provides a quick reference to the area in a focused manner, to support and encourage further research. Beginning with a focus on the structural features and occurrence of biflavanoids, Chapter 1 reviews key background information including notes on nomenclature and natural distribution. Chapter 2 then goes on to discuss methods for identification and isolation, with separation and purification using various chromatography methods reviewed, followed by identification via UV spectroscopy, NRM spectroscopy and mass spectrometry. Synthesis is the focus of Chapter 3, with a broad range of synthetic methods outlined, before the book concludes in Chapter 4 by describing the biochemical pharmacology of Biflavanoids and their anticancer, antimicrobial, antiviral, anti-inflammatory and analgesic activity. With its discussion of both the underlying chemistry and biological activity of Biflavanoids, "Biflavanoids: Chemical and Pharmacological Aspects "is a concise guide to this important class of compounds for all those working in the fields of medicinal chemistry and natural products drug discovery. Focused coverage of techniques for the isolation, identification, and synthesis of BiflavanoidsPractical tool for researchers working with these flavonoid compoundsReal-world expertise from the authors provides support for further developments in the growing field of natural product drug discoveryUseful, clear illustrations of key structures throughout the text

Black Wattle and Its Utilisation Book

Black Wattle and Its Utilisation


  • Author : Alan Gordon Brown
  • Publisher : Unknown
  • Release Date : 1997
  • Genre: Acacia decurrens
  • Pages : 167
  • ISBN 10 : CORNELL:31924073244760

GET BOOK
Black Wattle and Its Utilisation Excerpt :

Flavonoids and Bioflavonoids  1981 Book

Flavonoids and Bioflavonoids 1981


  • Author : Loránd Farkas
  • Publisher : Elsevier Science & Technology
  • Release Date : 1982
  • Genre: Bioflavonoids
  • Pages : 533
  • ISBN 10 : UOM:39015016022181

GET BOOK
Flavonoids and Bioflavonoids 1981 Excerpt :